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Using image signal

Subclass of:

348 - Television

348207990 - CAMERA, SYSTEM AND DETAIL

348335000 - Optics

348345000 - Focus control

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
348353000 By detecting contrast 16
348352000 With motion detection 14
348350000 With auxiliary sensor or separate area on imager 8
348354000 By analyzing high frequency component 4
20090244359OPTICAL APPARATUS - An optical apparatus is disclosed which achieves high focusing accuracy and favorable responsiveness in AF control. The apparatus includes a signal generator which extracts signals in a plurality of frequency bands from an output from an image-pickup part and generates focus signals from the extracted signals, and a controller which performs focus control such that the focus signal approaches the highest value. The controller uses a first focus signal and a second focus signal in the focus control. The second focus signal is a synthesis signal formed by synthesizing a focus signal in a relatively high or the highest frequency band of the plurality of frequency bands and a focus signal in another frequency band and contains a component of the focus signal in the relatively high or highest frequency band at a higher ratio as compared with the first focus signal.10-01-2009
20090322936AUTO FOCUSING METHOD FOR FACE DETECTION OF DIGITAL IMAGING DEVICE - A auto focusing method for face detection of a digital imaging device is described, in which high-frequency information of a focusing area is increased according to a size, a position of a face of a person to be shot, and an image area at least covering the face and body of the person, thereby improving a focusing success ratio.12-31-2009
20100295986ELECTRONIC CAMERA - An electronic camera includes an imager which outputs an object scene image in a designated cycle. The first changer changes a distance from a focus lens to the imaging surface. The first adjustor adjusts the designated cycle to a length corresponding to an illuminance of the object scene in association with a process of the first changer. The first specifier specifies a distance range including a focal point in parallel with the process of the first changer. The second changer changes the distance from the focus lens to the imaging surface in the distance range specified by the first specifier. The second adjustor adjusts the designated cycle to a length corresponding to a contrast of the object scene in association with a process of the second changer. The second specifier specifies the distance corresponding to the focal point in parallel with the process of the second changer.11-25-2010
20110310291Image pickup apparatus - An image pickup apparatus of the invention includes: an optical imaging system; an image pickup device; a defocus quantity calculation section for calculating a defocus quantity based on a phase difference between signals for focus detection obtained from pixels for focus detection; a high-frequency component quantity detection section for detecting a quantity of high-frequency component contained in a pixel signal outputted from a pixel other than the pixels for focus detection; a region determination section for determining in accordance with which of the defocus quantity and the high-frequency component quantity the optical imaging system is to be driven, according to a detection result of detecting in which of a plurality of divided blocks of the image pickup device an object of interest is present; and a focusing section for driving the optical imaging system in accordance with a determination result of the region determination section.12-22-2011
348351000 With oscillation of lens or sensor to optimize error signal 2
20110032413AUTO-FOCUSING TECHNIQUES BASED ON STATISTICAL BLUR ESTIMATION AND ASSOCIATED SYSTEMS AND METHODS - This is generally directed to auto-focusing techniques based on statistical blur estimation. An image can be captured at two or more candidate lens positions. The amount of blur of each image can then be determined, and the image containing the least amount of blur can be chosen as the “in-focus” image. In some embodiments, the amount of blur of an image can be determined by identifying how “Gaussian” an image is. Characteristics that are more Gaussian in nature can indicate that the image is more blurry. The Gaussianity of an image can be determined by estimating a generalized Gaussian shape parameter for that image. A smaller shape parameter can indicate the image is less Gaussian in nature. The shape parameter can be estimated in any suitable manner such as, for example, through a 2-d discrete wavelet transform, through a 1-d discrete wavelet transform, or through any other suitable manner.02-10-2011
20110001870IMAGING APPARATUS - An apparatus includes an imaging unit including an image sensor configured to photoelectrically convert an object image formed by a photographic lens, a light-blocking member configured to adjust an exposure time of the image sensor by mechanically closing an aperture thereof to block a light flux from the photographic lens from entering the image sensor through the aperture, and a driving unit configured to drive the imaging unit along an optical axis within a range including a position where at least a part of the imaging unit is inside the aperture of the light-blocking member.01-06-2011
Entries
DocumentTitleDate
20130044255AUTO-FOCUS IMAGE SYSTEM - An auto-focus image system includes a pixel array and a focus signal generator coupled to the pixel array. The pixel array captures an image that has more than one edge. The generator generates a focus signal. Each edge has a width and contributes a quantity to compute the focus signal. The quantity may remain unchanged if all pixel values that enter a computation of the quantity are scaled up by a common multiplier. The quantity may have a dimension based solely on a dimension of length. The quantity may be the width. The generator eliminates an edge whose gradient profile has a first width at a first percentage height of the gradient profile that falls outside a tolerance region. The tolerance region varies with a second width of the gradient profile at a second percentage height. Alternatively, the edge's contribution to the focus signal is deemphasized.02-21-2013
20110176051SYSTEM AND METHOD FOR FOCUSING OPTICS - In an apparatus and system for focusing optics an objective lens is configured to collect light from a region of an object to be imaged, said region having a feature with a known geometric characteristic, wherein the geometric characteristic is known before the feature is imaged by the optical device. A focusing sensor is configured to observe a shape of the feature and a splitter is configured to split the collected light into a first portion and a second portion, and directing said first portion through a weak cylindrical lens to the focusing sensor. A processor is configured to analyze the observed shape and determine whether the observed shape of the feature has a predetermined relationship to the known geometric characteristic and a mechanism is configured to autofocus the optical device by moving at least one of the objective lens and the object to be imaged in response to the analysis and determination of the processor. In some embodiments, the feature can be a fluorescent bead. In some embodiments, the splitting step can be accomplished with a dichroic mirror. In other embodiments, the splitting step can be accomplished with a partial mirror. In some embodiments, the known geometric characteristic of the feature can be substantially spherical, the observed shape can be an oval, and the predetermined relationship can be an allowable aspect ratio of the oval. In some embodiments, the allowable aspect ratio can be approximately one.07-21-2011
20090195689DIGITAL IMAGE PHOTOGRAPHING APPARATUS, METHOD OF CONTROLLING THE APPARATUS, AND RECORDING MEDIUM HAVING PROGRAM FOR EXECUTING THE METHOD - Provided are a digital image photographing apparatus which easily captures an image of a composition intended by a user, a method of controlling the apparatus, and a recording medium having a program for executing the method. The apparatus includes: an image capturing device for receiving light to generate data on an image; and an auto-focusing tracking unit for allowing a lens to be auto-focused on a subject selected by a user. The image capturing device generates data on a still image when the subject on which the lens is auto-focused is located in a predetermined region of interest (ROI).08-06-2009
20110194018IMAGE CAPTURING APPARATUS AND CONTROL METHOD THEREFOR - An image capturing apparatus capable of switching between an optical viewfinder and live view which involves periodically reading out an image signal out of an image sensor and sequentially displaying the image signal on a display unit, comprises a phase difference focus control unit that performs auto focus control using a phase difference detection method; a selection unit that selects one of a plurality of focus detection areas used for the auto focus control; an electronic zoom unit that changes an angle of view; and a control unit that causes the phase difference focus control unit to perform auto focus control by the phase difference detection method using the selected focus detection area if the selected focus detection area is located within the changed angle of view, otherwise not to perform auto focus control by the phase difference detection method using the selected focus detection area.08-11-2011
20130076970IMAGE PICKUP APPARATUS AND FOCUS DETECTION METHOD - The image pickup apparatus includes an image sensor photoelectrically converting paired object images formed by light fluxes from mutually different pupil areas of an image capturing optical system, a signal producing part producing, by using output from each of plural pixel lines in a focus detection area in the image sensor, paired image signals corresponding to the paired object images for each pixel line, a calculating part calculating a defocus amount by using the paired image signals produced for each pixel line. The calculating part shifts the paired image signals relatively, produce first correlation data showing change of a correlation value of the paired image signals according to their relative shift amount, adds the first correlation data produced for the respective plural pixel lines to produce second correlation data, and calculates the defocus amount from the second correlation data.03-28-2013
20100073551CAMERA BODY - The camera body includes an imaging element, a hot shoe, an internal light source, and a camera controller. The imaging element is configured to convert an optical image of the subject into an electrical signal, and is configured to produce image data for the subject. The hot shoe allows the flash device to be mounted. The internal light source is arranged to shine light on the subject. The camera controller is configured to calculate an evaluation value on the basis of the image data produced by the imaging element, and is configured to perform video autofocusing on the basis of the evaluation value. The camera controller controls the imaging element and the internal light source so that when the camera controller decides that the auxiliary light is needed, and the camera controller decides that the flash device mounted to the hot shoe has an external auxiliary light source arranged to emit near infrared light, the internal light source emits light during the video autofocusing and the image data is acquired.03-25-2010
20100073550SYSTEM AND METHOD FOR MEASURING A BORDER OF AN IMAGE OF AN OBJECT - A system and method for measuring a border of an image of an object includes setting measurement parameters, selecting a start point, an end point, and a image capture direction, and marking isS=true, moving a CCD lens to a current point, capturing an image by the CCD lens, and obtaining sequential border points of the image. The method further includes determining if the sequential border points are fuzzy, performing an automatic focus function if the sequential border points are fuzzy, or further determining the border of the object has been completely captured if the sequential border points are clear, calculating accurate border points if the border of the object has not been completely captured, and determining a new start point to capture the next image of the object.03-25-2010
20130038779FOCUS DETECTOR, AND LENS APPARATUS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A focus detector for detecting a defocus amount of an image pickup optical system based on a displacement amount between two images formed by two beams divided from the image pickup optical system and passed through two pupil areas, the focus detector including: two lenses; two phase difference sensors for photoelectrically converting two subject images formed by the two lenses into two image signals; a correlation computing unit for dividing the two image signals based on a reference number-of-pixels to compute an image displacement amount for each divided area; a waveform coincidence computing unit for computing a coincidence degree of the two image signals in the each divided area in which the image displacement amount is computed by the correlation computing unit; and a defocus computing unit for computing a defocus amount based on the coincidence degree of the two image signals computed by the waveform coincidence computing unit.02-14-2013
20130038780AUTO FOCUSING APPARATUS AND AUTO FOCUSING METHOD, AND IMAGE SENSING APPARATUS - a When a face is detected from image signals, stability determination time is set for determining if the face is recognized in a stable manner, and a period of time for which the face is consecutively detected starts to be measured. Until the measured period of time exceeds the stability determination time, an AF evaluation value acquired from a normal frame set to include a face frame corresponding to the face is used to exercise TV-AF control. Once the measured time exceeds the stability determination time, TV-AF control is exercised based on AF evaluation values acquired from each of the face frame and the normal frame.02-14-2013
20130038778FOCUS DETECTION SENSOR AND OPTICAL APPARATUS USING THE SAME - A focus detection sensor includes a line sensor comprised of a pair of sensor arrays in which a plurality of pixels are arranged. The sensor arrays include a pixel of a first type having an arrangement for transferring charges generated by a photoelectric conversion device to a corresponding memory device and causing the memory device to integrate the charges during a charge accumulation period, and a pixel of a second type having an arrangement for integrating, in the pixel, the charges generated by the photoelectric conversion device during the charge accumulation period without transferring the charges to the memory device until the end of the charge accumulation period, and transferring the charges to the corresponding memory device when the charge accumulation period has ended. An accurate charge accumulation result can be obtained by a simple arrangement.02-14-2013
20100045849IMAGE SENSING APPARATUS, IMAGE SENSING SYSTEM AND FOCUS DETECTION METHOD - An image sensing apparatus including: an image sensor including a plurality of focus detection pixel pairs that perform photoelectric conversion on each pair of light beams that have passed through different regions of a photographing lens and output an image signal pair; a flash memory that stores shift information on relative shift between an optical axis of the photographing lens and a central axis of the focus detection pixel pairs; a correction unit that corrects a signal level of the image signal pair based on the shift information and exit pupil information of the photographing lens so as to compensate for an unbalanced amount of light that enters each of the focus detection pixel pairs; and a focus detection unit that detects a focus of the photographing lens using the image signal pair corrected by the correction unit.02-25-2010
20100097515AUTO FOCUSING APPARATUS AND AUTO FOCUSING METHOD, AND IMAGE SENSING APPARATUS - When a face is detected from image signals, stability determination time is set for determining if the face is recognized in a stable manner, and a period of time for which the face is consecutively detected starts to be measured. Until the measured period of time exceeds the stability determination time, an AF evaluation value acquired from a normal frame set to include a face frame corresponding to the face is used to exercise TV-AF control. Once the measured time exceeds the stability determination time, TV-AF control is exercised based on AF evaluation values acquired from each of the face frame and the normal frame.04-22-2010
20120212662IMAGING DEVICE AND IMAGING APPARATUS - An imaging device includes a micro lens that collects light from a subject, a light sensing element that generates a signal for performing focusing determination through phase difference detection by sensing subject light collected by the micro lens, a first light blocking unit that performs pupil division by blocking a portion of the subject light, and a second light blocking unit that is disposed between the first light blocking unit and the micro lens, and blocks the portion of the subject light which is incident to the first light blocking unit, wherein an aperture area of the second light blocking unit is smaller than an aperture area of an image generation pixel.08-23-2012
20130027606LENS POSITION - Embodiments provide methods, apparatuses, and articles of manufacture for generating frames and changing lens positions based on the analysis of the frames. In one example, a controller coupled to a first camera and a second camera is to change a lens position of the first camera for a second frame based on the identification of a focal target in a frame generated by the second camera.01-31-2013
20130057753TWO-DIMENSIONAL IMAGER WITH SOLID-STATE AUTO-FOCUS - An imaging system having a solid-state auto focusing system advantageously images broadband light reflected from an object to be imaged using a lens objective having chromatic aberration, which focuses different colors of light at different focal planes. Using the color information in the focal planes in conjunction with an object distance determined by a range finder, a luminance plane is constructed that has a focused image of the object. The system provides the focused image of the object without the use of any moving parts.03-07-2013
20130135520APPARATUS FOR ADJUSTING AUTOFOCUS AND METHOD OF CONTROLLING THE SAME - An apparatus for adjusting an autofocus and a method of controlling the same are provided. The apparatus includes an imaging device that photographs light from a subject so as to generate an image signal; a contrast calculation unit that calculates a first contrast value of an image from the image signal; a correction unit that corrects a luminance of the image signal if the calculated first contrast value is equal to or less than a reference value; and a focus adjustment unit that adjusts a focus by using a second contrast value that is calculated from the corrected image signal, thereby providing an improved focus adjustment function.05-30-2013
20090268080Bracketing apparatus and method for use in digital image processor - Provided are an apparatus for and method of processing a digital image, specifically, a bracketing apparatus and method for use in a digital image processor, which can reduce a photographing time by calculating focuses for all detected faces by moving a focus motor only once after face detection, and then performing bracketing by compensating the focuses by an interval of the focus motor applied while calculating the focuses of each face. The bracketing apparatus includes a digital signal processor, which detects one or more faces from a live-view image, detects focus values for all detected faces by moving a focus motor only once, and then performs bracketing by compensating a focus by an interval of the focus motor applied while detecting the focus values of each face.10-29-2009
20090237553DIGITAL PHOTOGRAPHING APPARATUSES, METHODS OF CONTROLLING THE SAME, AND RECORDING MEDIUM STORING COMPUTER READABLE INSTRUCTIONS FOR EXECUTING THE METHODS - A digital photographing apparatus capable of automatically determining whether a macro mode is an appropriate mode, a methods of controlling the same, and a computer readable recording medium storing instructions for executing the method(s) is disclosed A lens position determining unit is disclosed that determines whether an auto-focusing lens position is within the lens position range corresponding to a macro mode, according to the position relationship between a lens position point corresponding to a maximum value of the plurality of auto-focus values obtained by an auto-focus value obtaining unit and other lens position points corresponding to other auto-focus lens values.09-24-2009
20090237552ELECTRONIC CAMERA - An electronic camera includes an imaging device. The imaging device has an imaging surface irradiated with an optical image of an object scene that undergoes a focus lens, and outputs an object scene image produced on the imaging surface. A CPU predicts a focus direction based on a focus position registered in a register when a shutter button is half-depressed. The CPU also changes a position of the focus lens by referencing a prediction result of the focus direction, and based on the object scene image outputted from the imaging device in parallel with this change process, adjusts the position of the focus lens to the focus position. The CPU further registers the adjusted position of the focus lens, as the focus position, into the register.09-24-2009
20090009652IMAGE DISPLAY CONTROL APPARATUS - An image display control apparatus includes a determination unit (step S01-08-2009
20120113316FOCUSING DEVICE AND CAMERA - A focusing device including: an optical system that includes a focusing lens; an image sensor that captures a subject image formed via the optical system and outputs an image signal containing a plurality of color components; an edge detection unit that detects an edge in correspondence to each color component among the plurality of color components contained in the image signal; a differential value calculation unit that calculates a differential value of an edge strength of the edge detected by the edge detection unit, in correspondence to the each color component; and a decision-making unit that determines a moving direction along which the focusing lens is to move for purposes of focus adjustment of the optical system based upon the differential value calculated by the differential value calculation unit.05-10-2012
20120113315FOCUSING DEVICE, IMAGE PICK-UP APPARATUS, AND CONTROL METHOD - A focusing device includes a first focus-position determining unit configured to determine a focus position based on a change in a radio-frequency component in an image signal obtained with movement of a focusing lens, a second focus-position determining unit configured to determine a focus position by using a different process from a process performed by the first focus-position determining unit, a mode setting unit configured to select at least a first mode which uses a result with the first focusing-position determining unit together with the second focusing-position determining unit or a second mode which uses a result with the first focus-position determining unit without the second focus-position determining unit, and a control unit configured to control driving of the focusing lens according to selection by the mode setting unit such that the focusing lens is driven in the first mode at a higher speed than in the second mode.05-10-2012
20100171871IMAGE SENSING APPARATUS AND CONTROL METHOD THEREFOR - In an image sensing apparatus including an image sensing unit with an image sensor and an EVF, first image signals obtained every preset number of frames, of image signals output from the image sensing unit are displayed on the EVF, focus evaluation values indicating a focus state of an image are obtained from second image signals obtained in frames other than the frames for the first image signals of the image signals output from the image sensing unit, a direction of driving a focus lens for an in-focus state is determined on the basis of the obtained focus evaluation values, and the determined driving direction is displayed on the EVF. Further, the focus lens is moved for image sensing in the frames for the second image signals to carry out image sensing of the subject at different focus lens positions for each frame.07-08-2010
20130021519APPARATUS AND METHOD FOR ADJUSTING FOCAL POINT BY USING IMAGING DEVICE FOR OUTPUTTING PHASE DIFFERENCE SIGNAL - Apparatus and method for adjusting a focal point using an imaging device including phase difference detection pixels are disclosed. An apparatus is provided that includes an imaging device comprising an optical aperture disposed between a micro lens and a photoelectric conversion unit of each of a plurality of pixels, the optical aperture being eccentric with respect to an optical axis of the respective micro lens, the imaging device configured to output a phase difference signal; and a control unit that detects a focal position from the phase difference signal detected from entire pixels of the imaging device to drive a focus lens and that adjusts a focal point.01-24-2013
20120013786FOCUS ADJUSTMENT APPARATUS AND METHOD, AND IMAGE CAPTURING APPARATUS AND CONTROL METHOD THEREOF - A focus adjustment apparatus comprises a detection unit that detects a subject/subjects having a predetermined characteristic from an image obtained while shooting a moving picture, a selection unit that, in the case where a subject/subjects having the predetermined characteristic have been detected by the detection unit, selects, from the detected subject/subjects, a subject that also fulfils a predetermined condition, and a focus adjustment unit that controls a focus lens to focus on the subject selected by the selection unit. The focus adjustment unit does not control the focus lens in the case where no subject having the predetermined characteristic has been detected by the detection unit.01-19-2012
20090102963Auto-focus image system - An auto focus image system that includes an image sensor coupled to a controller. The image sensor captures an image that has at least one edge with a width. The controller generates a focus signal that is a function of the edge width. A lens receives the focus signal and adjust a focus. The edge width can be determined by various techniques including the use of gradients. A histogram of edge widths can be used to determine whether a particular image is focused or unfocused. A histogram with a large population of thin edge widths is indicative of a focused image.04-23-2009
20090284645Camera - A face detecting section of a camera detects a face area in a shooting screen under an output of an image sensor. A focus detecting section calculates a defocus amount from a relative interval of a pair of images under an optical flux passed through a shooting lens in each of optional areas in the shooting screen. A first focus controlling section specifies a focus detecting area from the optional areas under an output of the face detecting section, and performs a focus operation under the defocus amount of the focus detecting area. A second focus controlling section calculates a focus evaluation value in the face area under an output of the image sensor, and performs a focus operation by using the focus evaluation value. A control section causes at least one of the first focus controlling section and the second focus controlling section to perform a focus operation.11-19-2009
20100201864IMAGE PICKUP APPARATUS AND IMAGE PICKUP METHOD - An image pickup apparatus which can reduce the time required for automatic focus scanning. The size of the face is determined based on information on a subject's face, which is detected from image data acquired by shooting by an image pickup device. The subject distance is estimated based on the determined size of the face. The depth of field is calculated. A range over which the focus lens is driven varies according to the estimated subject distance and the calculated depth of field.08-12-2010
20110134311IMAGING DEVICE AND IMAGING METHOD - An imaging device includes: an optical system which obtains an optical image of a photographic subject; an image sensor which converts the optical image to an electric signal; a digital signal processor which produces image data based on the electric signal; a display section which displays a photographic subject image expressed by the image data; and an operating section which performs a necessary setting regarding imaging, the digital signal processor including: an autofocus operation section which performs an autofocus operation based on data of an autofocus area set in the photographic subject image; a main area setting section which sets a main area in the photographic subject image; and a blurring operation section which performs a blurring operation on an area other than the main area in the photographic subject image, wherein the autofocus area is set automatically to overlap with at least a part of the main area.06-09-2011
20090207299ELECTRONIC CAMERA - An electronic camera includes an imaging device. The imaging device has an imaging surface capturing an object scene through a focus lens and repeatedly produces an object scene image. The focus lens is moved in an optical-axis direction in parallel with a process of the imaging device. A high-frequency component of the object scene image is extracted by a focus evaluation circuit in parallel with moving of the focus lens. A CPU specifies lens positions respectively corresponding to local maximum values found from the extracted high-frequency component. When an interval ΔF between the specified lens positions falls below a threshold value, the focus lens is placed at a lens position on the nearest side, out of the specified lens positions. When the interval ΔF is equal to or more than the threshold value, the focus lens is placed at a position different from the lens position on the nearest side.08-20-2009
20080316353IMAGE TAKING APPARATUS AND LENS APPARATUS - An image taking apparatus which can perform a focusing operation quickly is described. The image taking apparatus comprises a light splitting unit which splits a light flux from the image-taking lens into a plurality of light fluxes, a view finder optical system for observing an object image formed by the light flux from the image-taking lens, an image pickup element which photoelectrically converts the object image to an electric signal and a focus detection unit for detecting the focusing state of the image-taking lens according to a phase difference detection system. Here, the light splitting unit changes between a first state in which the light flux is directed to the view finder optical system and the focus detection unit and a second state in which the light flux is directed to the image pickup element and the focus detection unit.12-25-2008
20090273704Method and Apparatus for Motion Detection in Auto-Focus Applications11-05-2009
20090256953IMAGE CAPTURING APPARATUS AND CONTROL METHOD THEREFOR - In an image capturing apparatus that carries out TV-AF type autofocus control by setting an AF frame on a predetermined object, for example a person's face, that is detected in an image, in a case in which a in-focus position search direction cannot be determined from an AF evaluation value, changes in the size of the region of the object are detected and focus detection is carried out by determining the in-focus position search direction based on the changes in the size of the region of the object.10-15-2009
20120268647IMAGE PICKUP APPARATUS AND CONTROL METHOD THEREOF - The image pickup apparatus electrically converts an object image to produce an image signal and includes a first detector detecting a first in-focus position by a phase difference detection method, a second detector detecting a second in-focus position by a contrast detection method using the image signal, and a corrector correcting, based on a difference between the first and second in-focus positions, the first in-focus position for image pickup. A controller instructs the optical apparatus to move the focus lens by a predetermined movement amount when the second in-focus position is detected, receives, from the optical apparatus, information on an actual movement amount of the focus lens in response to the instruction, and instructs again the optical apparatus to move the focus lens with change of the predetermined movement amount when a difference between the predetermined and actual movement amounts exceeds a predetermined value.10-25-2012
20090167931IMAGING DEVICE - An imaging device is provided to perform focus control by detecting a facial part of a person, or to prevent focus shift to a background other than a human subject even when no facial part is detected, and to ensure that a subject desired by a user is photographed. A timer is started by a half-pressing operation of a release button. When a facial part of a person is detected, photographing is performed by focusing on the facial part. When no facial part is detected, the lengths of a time period T07-02-2009
20090322935IMAGING APPARATUS AND IMAGING METHOD - An imaging apparatus includes an imaging unit configured to receive an optical image transmitted through a lens unit and configured to convert the image into image data, a target image detection unit configured to detect a target image satisfying a predetermined form from the image data converted by the imaging unit, and a focus control unit configured to move a focus position of the lens unit by a predetermined amount according to a result of the target image detected by the target image detection unit. The target image detection unit detects the target image from image data converted by the imaging unit in the moved focus position when the focus control unit moves the focus position of the lens unit by the predetermined amount according to the detected result of the target image.12-31-2009
20090180021METHOD FOR ADJUSTING POSITION OF IMAGE SENSOR, METHOD AND APPARATUS FOR MANUFACTURING A CAMERA MODULE, AND CAMERA MODULE - A lens unit and a sensor unit are held by a lens holding mechanism and a sensor shift mechanism. As the sensor unit is moved in a Z axis direction on a second slide stage, a chart image is captured with an image sensor through a taking lens so as to obtain in-focus coordinate values in at least five imaging positions on an imaging surface. An approximate imaging plane is calculated from the relative position of plural evaluation points which are defined by transforming the in-focus coordinate value of each imaging position in a three dimensional coordinate system. The second slide stage and a biaxial rotation stage adjust the position and tilt of the sensor unit so that the imaging surface overlaps with the approximate imaging plane.07-16-2009
20100141828APPARATUS AND METHOD FOR ELECTRO-OPTICAL SPLIT IMAGE FOCUSING - Provided are an electro-optical split image focusing apparatus and method through which an in-focus position of a photographed plane with respect to the image of a subject can be detected with accuracy and speed. The apparatus comprises at least one electro-optical element disposed along an optical axis between a subject and a photographed plane. The electro-optical element is characterized by a refractive index that varies with distance along a perpendicular to the optical axis when a voltage is applied. An image of the subject is transmitted toward the photographed plane through the electro-optical element.06-10-2010
20130120642DIGITAL PHOTOGRAPHING APPARATUS AND METHOD OF CONTROLLING THE SAME - A digital photographing apparatus and a method of controlling the same. According to the method of controlling a digital photographing apparatus, when an image of a portion of an area is expanded for display for manual focusing, an image of the entire area and the expanded image are displayed simultaneously so that the user is able to determine which part of the entire image is currently being focused on. Thus, user convenience may be improved.05-16-2013
20130120643FOCUS DETECTION APPARATUS AND IMAGE PICKUP APPARATUS - The focus detection apparatus includes an image pickup part 05-16-2013
20130120644IMAGE CAPTURE ELEMENT AND IMAGING DEVICE - In a second image sensor 05-16-2013
20130215320Zoom Lens System, Imaging Optical Device, and Digital Appliance - A zoom lens system is composed of negative, positive, negative, and positive lens groups, of which at least the first to third move during zooming. During zooming from the wide-angle end to the telephoto end, the distance between the first and second lens groups decreases, the distance between the second and third lens groups varies, and the distance between the third and fourth lens groups increases. The conditional formulae 1.0≦|f2/f1|≦1.5 and 2.0≦|f4/f1|≦5.0 are fulfilled (f1, f2, and f4 representing the focal lengths of the first, second, and fourth lens groups).08-22-2013
20090086084Solid-state image device - A solid-state image device has a photoelectric conversion part and has pixels for focus detection and pixels for image which are allocated in a row direction and a column direction, and the solid-state image device includes a vertical scanning circuit for image which reads image signals to a horizontal output circuit for image via vertical signal lines for image, a horizontal scanning circuit for image which outputs in a horizontal direction image signals of one row read to the horizontal output circuit for image, a horizontal scanning circuit for focus detection which reads signals for focus detection to a vertical output circuit for focus detection via horizontal signal lines for focus detection, and a vertical scanning circuit for focus detection which outputs in a vertical direction signals for focus detection of one column read to the vertical output circuit for focus detection.04-02-2009
20080284901AUTOMATIC FOCUS ADJUSTING APPARATUS AND AUTOMATIC FOCUS ADJUSTING METHOD, AND IMAGE PICKUP APPARATUS AND IMAGE PICKUP METHOD - In an automatic focus adjusting method for adjusting the focus based on image signals in a preset focus detection area, the face is detected from an image, and the detected face area is set as the focus detection area in a front-light scene. On the other hand, when a backlight scene is identified, an area in which the detected face area is reduced is set as the focus detection area. This enables to control the focus so that the face is accurately focused on without being affected by the contrast of the contour of the face in a backlight scene (contrast of the contour of the face is strong in the backlight scene).11-20-2008
20100165177AUTOMATIC FOCUSING METHOD IN HIGH-NOISE ENVIRONMENT AND DIGITAL IMAGING DEVICE USING THE SAME - An automatic focusing method in a high-noise environment and a digital imaging device using the same are used for determining an object distance. The method includes taking two digital images at a farthest object distance and taking two digital images at a nearest object distance, under a first exposure condition and a second exposure condition; capturing digital images under the first exposure condition at a plurality of different object distances other than the farthest and nearest object distances; selecting at least two images captured at adjacent object distances to create a composite image; calculating an object distance of the composite image; calculating high-frequency signals of the second farthest object distance image, the second nearest object distance image, and the composite image in the focusing frame; determining from the images an object distance corresponding to the maximum high-frequency signal; and moving an automatic focusing lens to the object distance.07-01-2010
20100157136SYSTEM AND METHOD TO AUTOFOCUS ASSISTED BY AUTOEXPOSURE CONTROL - In a particular embodiment, a method is disclosed that includes comparing a frame rate of image capture by an image sensor to a frame rate threshold at an image capture device. The method also includes when the frame rate is less than the frame rate threshold, increasing the frame rate to a modified frame rate that is greater than or at least equal to the frame rate threshold. The method further includes performing an autofocus operation on an image to be captured at the modified frame rate.06-24-2010
20100002128IMAGE PICKUP APPARATUS, METHOD OF CONTROLLING THE SAME, AND STORAGE MEDIUM - An image pickup apparatus which is capable of performing stable and high-speed focusing on an object intended by a photographer. In a video camera as the image pickup apparatus, an image pickup element picks up an object image formed by a photographic optical system including a focus lens and thereby outputs a video signal. A face-detecting section detects a face detection area based on the video signal. An AF signal processing circuit generates an AF evaluation value signal. An external ranging unit generates object distance information. A microcomputer performs a TV-AF process using an AF evaluation value of the AF evaluation value signal and an external ranging AF process using the object distance information. The microcomputer controls execution of the two focus control processes according to a result of the detection by the face-detecting section.01-07-2010
20100182495FOCUSING MEASUREMENT DEVICE, FOCUSING MEASUREMENT METHOD, AND PROGRAM - A focusing measurement device according to the present application includes an image input section that obtains a captured image; a filter section that generates, with respect to the image, blurred images by using each pair of filters having different frequency characteristics; an extracting section that extracts, at each of specific points on the image, a first feature quantity and a second feature quantity both from the image and the respective blurred images; and a focusing measurement section that calculates, from the first feature quantity and the second feature quantity, a focusing amount indicating a degree of in-focus to measure a focusing level at each of the specific points on the image.07-22-2010
20100259670Methods and Apparatus for Coordinated Lens and Sensor Motion - In exemplary implements of this invention, a lens and sensor of a camera are intentionally destabilized (i.e., shifted relative to the scene being imaged) in order to create defocus effects. That is, actuators in a camera move a lens and a sensor, relative to the scene being imaged, while the camera takes a photograph. This motion simulates a larger aperture size (shallower depth of field). Thus, by translating a lens and a sensor while taking a photo, a camera with a small aperture (such as a cell phone or small point and shoot camera) may simulate the shallow DOF that can be achieved with a professional SLR camera. This invention may be implemented in such a way that programmable defocus effects may be achieved. Also, approximately depth-invariant defocus blur size may be achieved over a range of depths, in some embodiments of this invention.10-14-2010
20110058096FAST FOCUSING METHOD FOR DIGITAL CAMERA - A fast focusing method for a digital camera is applied in an auto focusing stage for judging whether the digital camera needs to be refocused. The fast focusing method includes recording a system time after a previous focusing (defined as a first time); capturing a system time before a current focusing (defined as a second time); performing a fuzziness detection procedure to acquire a focus value when a difference obtained by subtracting the first time from the second time is greater than a focusing time threshold; setting a focusing focal length range covering a reference focal length when the focus value is between a lower limit focusing threshold and an upper limit focusing threshold; capturing images at different focusing focal lengths respectively in the focusing focal length range; calculating a contrast value of each image; calculating a target focal length from the contrast values through a quadratic curve approximation method.03-10-2011
20100220230METHOD AND APPARATUS FOR CONTROLLING AUTO FOCUS, AND DIGITAL PHOTOGRAPHING APPARATUS USING THE METHOD AND APPARATUS - Provided is a method and apparatus for controlling an auto focus (AF) function. The method performs AF only on an area that is converted according to a shape of a subject, instead of on an area in a predetermined frame. Accordingly, focus is accurately adjusted even in a backlight situation or in a dark place, and also, an AF speed is increased since an AF area to be calculated is reduced.09-02-2010
20090256952Correlation calculation method, correlation calculation device, focus detection device and image-capturing apparatus - A focus detection device includes: a light-receiving unit that receives a pair of images and outputs a first signal string and a second signal string; a decision-making unit that determines a condition assumed as the light-receiving unit receives the pair of images; a selection unit that selects a correlation operation expression among a plurality of correlation operation expressions in correspondence to the condition; a correlation calculation unit that calculates a correlation quantity between a plurality of first/second signals included in the first/second signal string by applying the correlation operation expression selected; a shift amount detection unit that detects a shift amount between the pair of images; and a focus detection unit that detects a focusing condition. The selection unit selects the correlation operation expression to reduce an extent to which signal intensity difference between the first and the second signal strings affects the correlation quantity.10-15-2009
20090115887IMAGING APPARATUS AND METHOD - If an aperture of the objective-imaging is the same as an aperture when a state has turned into a focused state with autofocus before the objective-imaging or if an F value of the objective-imaging is equal to or greater than an F value when a state has turned into a focused state with autofocus before the objective-imaging, the focused state is maintained and the focusing of the objective-imaging is skipped. Even in other cases, a in-focus position is detected near the in-focus position before the objective-imaging. Alternatively, if the user selects a speed priority, the in-focus position is detected in a narrow range near the in-focus position before the objective-imaging. This enables to achieve both enough speed and focus accuracy of the main-photographing.05-07-2009
20090115886AUTO-FOCUS METHOD AND DIGITAL CAMERA - An auto-focus method for camera is provided. First, a digital signal processor sets a first parameter p and a second parameter q. An image capture unit captures an only image. Then, the digital signal processor utilizes the only image, the first parameter p and the second parameter q to compute an object distance. Then, an optical focusing device utilizes the object distance to regulate a focal position. Therefore, the present invention substantially shortens the time for regulating the focal position.05-07-2009
20080284900Digital camera - A digital camera includes: an imaging unit that receives and images a light from a subject transmitted a photographing optical system; a recognition unit that recognizes a feature region of the subject using an image obtained by imaging with the imaging unit; a detection unit that detects a size of the feature region that is recognized with the recognition unit; and a control unit that predicts a distance to the subject after a predetermined period of time according to the size of the feature region, and controls the photographing optical system so as to focus on the subject.11-20-2008
20080278619IMAGING DEVICE - In a present imaging device, an optical image formed through a lens group from a subject is converted into an imaging signal by an imaging element and a focused area is detected by a focused area detection portion. Optical displacement or physical movement of the lens group is detected by a focus lens movement detector and an adjustment stage of the lens group is determined by a focused stage determination portion based on a detection signal output from this. Based on the determination result, the focused area of the imaging signal is automatically enlarged and output.11-13-2008
20110122310CAMERA AND METERING METHOD FOR CAMERA - A camera includes: a taking lens forming an image of a subject; an image pickup unit; a subject brightness acquisition unit acquiring the brightness information of the subject on the basis of the output of the image pickup unit; a control unit controlling the exposure according to the brightness information acquired by the subject brightness acquisition unit; and a storage unit storing the information indicating the optical state of the taking lens before the subject brightness acquisition unit acquires the brightness information. The control unit determines whether or not the brightness information is acquired again by the subject brightness acquisition unit according to the information about the optical state of the taking lens stored in the storage unit when the subject brightness acquisition unit previously acquired the brightness information, and the information about the optical state of the taking lens when the latest brightness information is acquired.05-26-2011
20110128434LENS DRIVE DEVICE, IMAGE-CAPTURING DEVICE, AND ELECTRONIC APPARATUS - An image-capturing device includes a detector which detects that a resistance value of an actuator, made of shape memory alloy, is maintained within a predetermined range. The image-capturing device moves a lens step by step from a place corresponding to a first field in order to obtain image data from each one of the fields provided in a focus region. The image-capturing device also calculates a target place, where the lens should be finally positioned, by using the obtained image data, and then positions the lens at the calculated target place. The foregoing structure allows obtaining reliable and stable data.06-02-2011
20110115967METHOD AND APPARATUS FOR FOCUSING ON SUBJECT IN DIGITAL IMAGE PROCESSING DEVICE - An method and apparatus focus on a subject in a digital image processing device, the apparatus including a digital signal processor (DSP) for focusing on a subject based on an eye detected from a face of a subject having a greater ratio than a predetermined ratio in a picture.05-19-2011
20110085073Camera Module and Method for Adjusting Focus of Lens in Camera Module - Disclosed herein is a camera module having a selective focus adjustment function. The camera module includes a lens part containing a multiple of lenses, an image sensor converting an optical image transmitted through the lens part into an electric signal, and a main control part transferring the lens part driving signal to set a focusing area around the finger end part indicated by a finger in an image obtained from the optical image in a preview state. According to the proposed invention, a focusing region is set around the end part of a finger at the time of capturing an image when a user indicates a desired focusing setting area by a finger, so that the user can take the focus by selecting a desirable focus position freely at the time of photographing an image using a portable terminal having a camera module of the present invention.04-14-2011
20090213263IMAGING SYSTEM AND METHOD FOR DETECTING TARGET OBJECT - An imaging system includes an imaging device, a recognition device, a focus detector, a correcting device, and a selecting device. The imaging device is configured to capture an image formed by an imaging optics. The recognition device is configured to recognize a target object candidate in the image captured by the imaging device. The focus detector is configured to detect a focus adjustment state of the imaging optics. The correcting device is configured to obtain a magnification of an image of the target object candidate and configured to correct the magnification based on the focus adjustment state with respect to the target object candidate detected by the focus detector. The selecting device is configured to select a target object from the target object candidate based on the corrected magnification corrected by the correcting device.08-27-2009
20120188437ELECTRONIC CAMERA - An electronic camera includes an imager. An imager has an imaging surface capturing an optical image through a focus lens and repeatedly outputs an electronic image corresponding to the optical image. A designator designates, on the imaging surface, an area corresponding to a partial image coincident with a dictionary image out of the electronic image outputted from the imager. A changer repeatedly changes a distance from the focus lens to the imaging surface after a designating process of the designator. A calculator calculates a matching degree between a partial image outputted from the imager corresponding to the area designated by the designator and the dictionary image, corresponding to each of a plurality of distances defined by the changer. An adjuster adjusts the distance from the focus lens to the imaging surface based on a calculated result of the calculator.07-26-2012
20110249173FOUR-DIMENSIONAL POLYNOMIAL MODEL FOR DEPTH ESTIMATION BASED ON TWO-PICTURE MATCHING - Camera depth estimation is performed in response to picture matching based on blur difference computed between images captured at different focal positions. A blur difference model is stored in the camera based on characterization of the camera with a series of matching curves in which blur difference varies depending on the focal length, aperture, subject distance, and lens focus position. A four-dimensional polynomial model is created to fit the matching curves for use in estimating subject distance. During operation, images are captured for use in estimating subject distance. Motion compensation is applied and blur difference is determined. Blur difference is utilized in the polynomial model to estimate subject distance. Subject distance estimates can be output or utilized within an auto focus process to provide accurate focus adjustments.10-13-2011
20120120304Digital Image Processing Using Face Detection and Skin Tone Information - A technique for processing a digital image uses face detection to achieve one or more desired image processing parameters. A group of pixels is identified that corresponds to a face image within the digital image. A skin tone is detected for the face image by determining one or more default color or tonal values, or combinations thereof, for the group of pixels. Values of one or more parameters are adjusted for the group of pixels that correspond to the face image based on the detected skin tone.05-17-2012
20110043680AUTO FOCUSING APPARATUS AND CONTROL METHOD - The invention includes steps of setting a main area set within the frame of a photographed image signal, and a plurality of auxiliary areas each of which is smaller than the main area, selecting one or a plurality of focus detection areas from the main area and the auxiliary areas in accordance with the in-focus position of a focus lens based on the focus signals of the main area and the auxiliary areas, and controlling the focus lens to move to the in-focus position of the focus lens in the focus detection area selected in the selecting step.02-24-2011
20110043681IMAGING APPARATUS AND METHOD FOR CONTROLLING THE SAME - An apparatus includes an imaging unit configured to photoelectrically convert an object image incident via a focus lens to acquire image data; a detection unit configured to detect a size and a position of an object based on the acquired image data; an adjustment unit configured to execute focus adjustment by acquiring a focus signal indicating a focusing state of the focus lens based on the image data while moving the focus lens, and moving the focus lens based on the focus signal; and a control unit configured to execute an operation if the detected size has changed, and to change the operation if the detected position has changed while the detected size has not changed.02-24-2011
20110019068COMPUTATIONAL IMAGING SYSTEM - An imaging sub-system, a liquid crystal (LC) element, and a digital focus processor are provided. The LC element is placed in the light path of the imaging sub-system, functioning as the aperture of the imaging sub-system, and includes a periodically patterned electrode which is patterned according to a periodical modulation function and configured to blur an intermediate image captured by the imaging sub-system by applying a controllable voltage thereto. The digital focus processor is configured to deconvolute the periodical modulation function to remove the blur away from the intermediate image and determine an all-in-focus real image.01-27-2011
20100097516Method And System For Providing Background Blurring When Capturing An Image Using An Image Capture Device - A method and system are described for providing background blurring when capturing an image using an image capture device. According to one aspect, input is received for initiating an image capture process for capturing an image of a subject at an image capture device. A depth of field for capturing the image of the subject in a half of the depth of field furthest from the image capture device is automatically determined. The image is captured using the automatically adjusted depth of field to provide background blurring in the captured image.04-22-2010
20120200765CAMERA BODY - The camera body includes an imaging element, a hot shoe, an internal light source, and a camera controller. The camera controller is configured to calculate an evaluation value on the basis of the image data produced by the imaging element, and perform video autofocusing on the basis of the evaluation value. When the camera controller decides that the auxiliary light is needed, and that the flash device mounted to the hot shoe has an external auxiliary light source arranged to emit near infrared light, the internal light source emits light during the video autofocusing.08-09-2012
20110157457AUTO-FOCUS INTRA-ORAL CAMERA HAVING A LINEAR PIEZOELECTRIC ACTUATOR - An auto-focus camera has an optical system for forming an image of a target, a moveable sensor for recording a set of one or more images of the target, the set of one or more images corresponding to a set of one or more positions for the moveable sensor, and a linear piezoelectric actuator mechanically coupled to the moveable sensor for driving the moveable sensor to the set of one or more positions along a predetermined moving direction in response to a stimulus. A driving system is actuable to generate the stimulus to drive the piezoelectric actuator. An image processor, in response to stored instructions, obtains the set of one or more recorded images from the moveable sensor, processes the set of one or more obtained recoded images, and identifies the image that is in focus.06-30-2011
20120033128Optical Device and Focus State Detection Method - An optical device comprises an image sensor having plural pixels and a detection unit configured to detect a focus state. The pixels include first focus state detection pixel pairs that respectively receive a pair of light fluxes having transmitted different pupil areas of the photographing lens, and second focus state detection pixel pairs that respectively receive a pair of light fluxes having transmitted pupil areas shifted by a predetermined amount from the pupil areas where the pair of light fluxes received by the first focus state detection pixel pairs have transmitted. The detection unit detects the focus state based on signal pairs obtained by adding the signals output from the first and second focus state detection pixel pairs, respectively, if a subject to be photographed is darker than a predetermined brightness, otherwise the detection unit detects the focus state based on signal pairs output from the first and second focus state detection pixel pairs, respectively.02-09-2012
20100315545Zoom lens and image pickup apparatus - Provided is a zoom lens including a first lens group, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power, wherein conditional expressions f12-16-2010
20110134312AUTO-FOCUS IMAGE SYSTEM - An auto focus image system that includes a pixel array coupled to a focus signal generator. The pixel array captures an image that has at least one edge with a width. The focus signal generator may generate a focus signal that is a function of the edge width and/or statistics of edge widths. A processor receives the focus signal and/or the statistics of edge widths and adjusts a focus position of a focus lens. The edge width can be determined by various techniques including the use of gradients. A histogram of edge widths may be used to determine whether a particular image is focused or unfocused. A histogram with a large population of thin edge widths is indicative of a focused image. The generator may eliminate an edge having an asymmetry of a gradient profile of an image signal. The generator may also eliminate an edge that fails a template for an associated peaking of the gradient.06-09-2011
20110261252IMAGING SYSTEM AND METHOD OF OPERATING THE SAME - An imaging system includes a lens assembly, an image sensor, an image processing unit, an actuator, and a control unit. The lens assembly is configured for focusing a subject image. The image sensor is located at the image side of the lens assembly for providing image information corresponding to the subject image. The image processing unit is electrically connected to the image sensor for modifying the image information in a digital image process. The actuator is connected to the lens assembly for adjusting the depth of field of the lens assembly. The control unit is electrically connected to the image sensor, the image processing unit and the actuator for receiving the electronic information to control the image processing unit or the actuator so as to provide a clear image.10-27-2011
20100182494WAVELENGTH DETECTING APPARATUS AND FOCUS DETECTING APPARATUS HAVING THE SAME - A wavelength detecting apparatus capable of detecting the main wavelength of the light coming into an image capture apparatus and a focus detecting apparatus using the same are disclosed. The wavelength detecting apparatus may include a spectral unit which separates the incoming light according to the respective wavelengths, and may focus the separated light onto a sensor. The main wavelength can be determined based on the wavelength distribution sensed by the sensor. The determined wavelength can be used to further determine amount of adjustment to be made to the defocus amount to compensate for the chromatic aberration associated with the wavelength of the light illuminating the source.07-22-2010
20100194972FOCUSING DEVICE AND IMAGE PICKUP APPARATUS - A focusing device includes a distance information acquisition section acquiring information on a distance to a subject based on a plurality of image data acquired by taking images of the subject at a plurality of different viewpoint positions. A subject detection section detects a first area and a second area based on the distance information and threshold information for the distance range within which a subject of interest that obstructs a main subject in the subject is present. In the first area, the subject of interest is present in each of the plurality of image data. In the second area, the subject of interest is not present. A focusing estimation section estimates the focusing of the main subject based on the distance information on the second area in each of the plurality of image data.08-05-2010
20100194971TWO-DIMENSIONAL POLYNOMIAL MODEL FOR DEPTH ESTIMATION BASED ON TWO-PICTURE MATCHING - Apparatus and method for electronically estimating focusing distance between a camera (still and/or video camera) and a subject. Images at different focal positions of a calibration target are collected with distances between subject positions. In one aspect, histogram matching is performed to reduce noise error. A focus matching model is then generated in response to detected blur differences between successive images of the calibration target. The focus matching model is preferably converted to a polynomial equation of a desired order to smooth out image collection noise. The focus matching model is stored for access during operation. In use, the distance to subject is estimated in response to capturing images, detecting blur differences between the images and entering the blur difference information into the matching model.08-05-2010
20100194970Automatic focusing apparatus and optical device - The present invention is directed to the provision of an automatic focusing apparatus that can detect a focusing point at a sufficiently high speed for practical use and can achieve a lens condition having good focusing performance. The automatic focusing apparatus of the present invention includes a liquid crystal lens which forms a refractive index profile, an optical-to-electrical conversion unit which converts an optical image focused through the liquid crystal lens into an electrical signal and outputs the electrical signal as an image signal, a focus signal extracting unit which causes the refractive index profile to change by applying a first range of voltage to the liquid crystal lens, and extracts a plurality of focus signals based on the image signal, a focusing point identifying unit which identifies a focus signal corresponding to a focusing point from among the plurality of extracted focus signals, and a focusing point adjusting unit which adjusts the focusing point by applying to the liquid crystal lens a second voltage that is capable of generating the refractive index profile corresponding to the focus signal identified by the focusing point identifying unit and that is smaller than the first range of voltage applied to the liquid crystal lens in order to obtain the focus signal identified by the focusing point identifying unit.08-05-2010
20090135292Image recognition device, focus adjustment device, image-capturing device, and image recognition method - An image recognition device includes; an image sensor that captures an image via an image forming optical system and outputs image information repeatedly; a detector that detects differences between reference image information related to a reference image and a plurality of sets of partial information included in the image information; a recognition circuit that includes a microprocessor and recognizes a set of partial information, for which a smallest difference value among a plurality of differences detected in correspondence to the plurality of sets of partial information is calculated, as information matching the reference image information if the smallest value is smaller than a threshold value; and a controller that includes a microprocessor and sets the threshold value in correspondence to a color indicated in the reference image information05-28-2009
20110063494CONTINUOUS FOCUSING METHOD FOR DIGITAL CAMERA - A continuous focusing method for a digital camera is described, which is applicable to determine whether the digital camera performs a focusing procedure or not when the digital camera switches from a first scene to a second scene in a live view stage. The continuous focusing method includes the following steps. A preview image of a second scene is obtained. A blur detection procedure is performed on the preview image, so as to acquire a corresponding focus value. It is determined whether the focus value exceeds a focusing threshold value or not; if not, a focusing procedure is performed; otherwise, if the focus value is greater than the focusing threshold value, the digital camera still maintains a current focusing focal length, which represents that a focusing focal length of the second scene is the same as that of the first scene.03-17-2011
20120008038ASSISTING FOCUSING METHOD FOR FACE BLOCK - An assisting focusing method is applicable in an image capture device having an auto focusing (AF) procedure. The AF procedure has a preset sampling interval. The assisting focusing method includes the following steps. An image for focusing is captured. A face parameter of a face block in the image for focusing is calculated. According to the face parameter, a parameter-to-focus conversion table is looked up to acquire a focusing section. According to the focusing section and a face sampling interval, the AF procedure is performed to acquire a target focus. The face sampling interval is smaller than the preset sampling interval.01-12-2012
20120057072FOCUS ADJUSTMENT APPARATUS AND IMAGE CAPTURING APPARATUS - A focus adjustment apparatus for performing focus adjustment using a captured image and a plurality of point spread functions prepared in advance for each defocus direction and defocus amount is provided. The apparatus includes a focus adjusting stop whose aperture does not have rotational symmetry about an optical axis. Focus adjustment is performed by comparing the plurality of point spread functions prepared in advance with a point spread function of an image captured using the focus adjusting stop and not having rotational symmetry about the optical axis, obtaining the defocus direction and the defocus amount, and performing the focus adjustment according to the obtained defocus direction and defocus amount.03-08-2012
20120307133System And Method For Extending Depth Of Field In A Lens System By Use Of Color-Dependent Wavefront Coding - An optical system for generating an image having extended depth of field. The system includes a phase mask and a chromatic wavefront coding lens. The chromatic wavefront coding lens provides axial color separation of light by generating specified chromatic aberration in an image created by the lens. The phase mask causes the optical transfer function of the optical system to remain substantially constant within a specified range away from the image plane, and the optical transfer function of the system contains no zeroes within at least one spectral passband of interest. Digital processing may be performed on the image to generate a final image by reversing a decrease in modulation transfer function generated by the phase mask.12-06-2012
20120062788FOCUSING APPARATUS - A focusing apparatus including a focus lens; a focus lens driving unit that drives the focus lens; an imaging device configured to generate an image signal; a focus evaluation value calculating unit configured to receive an image signal from the imaging device and to calculate a focus evaluation value of a captured image; a difference calculating unit configured to calculate a difference between a current focus evaluation value and a previous focus evaluation value; a first determining unit configured to compare the difference to each of a plurality of threshold values different from each other; a counter configured to count results of comparing the difference to each of the plurality of threshold values and to generate count information; and a second determining unit configured to compare the count information to threshold count information and to determine a target drive direction in which the focus lens is to be driven.03-15-2012
20120154669IMAGING APPARATUS AND METHOD - An imaging apparatus that adjusts focus based on frequency components extracted from an image signal is provided. The apparatus includes a 1st order Infinite Impulse Response (IIR)-filter including a plurality of sample delayers having a plurality of line buffers for buffering and delaying a plurality of samples to sequentially read pixels of the image signal through raster scanning and extracting frequency components of the image signal from the read pixels by using the plurality of sample delayers; and a delay sample number controller for controlling the IIR-filter to match the number of horizontal pixels sequentially read from the image signal through raster scanning to the number of the plurality of samples buffered by the plurality of line buffers, wherein the delay sample number controller commands the IIR-filter to read a sample from each of the plurality of line buffers in a direction perpendicular to a direction of the raster scanning, and perform filtering processing on the read sample.06-21-2012
20120300116IMAGE PICKUP APPARATUS AND CONTROL METHOD THEREFOR - The image pickup apparatus includes a first detector detecting a first in-focus position by a phase difference detection method using paired image signals, a controller controlling position of a focus lens a basis of the first in-focus position to perform focusing, a second detector detecting a second in-focus position by a contrast detection method, a calculating part calculating a correction value for correcting the first in-focus position in image capturing on a basis of difference between the first and second in-focus positions, and a determining part determining a level of reliability of the first in-focus position. The controller calculates the correction value when the level of reliability is a first level, and to restrict the calculation of the correction value when the level of reliability is a second level lower than the first level.11-29-2012
20100245657FOCUS POSITION CONTROL APPARATUS AND CAMERA - A focus position control apparatus includes a lens for forming an image from light from a subject, an imaging element and an imaging controller for performing photoelectric conversion on the subject image, lights having at least two different wavelengths or wavelength bands, on an imaging plane to generate at least a visible-region image signal and an infrared-region image signal, a focus-position movement mechanism for moving the lens in a direction along an optical axis relative to the imaging plane, a focusing state evaluator for evaluating a focusing state in each wavelength or wavelength band based on the generated visible-region image signal and infrared-region image signal, and a movement controller for driving the focus-position movement mechanism based on the evaluation result from the focusing state evaluator.09-30-2010
20120127360IMAGE-CAPTURE SYSTEM AND METHOD WITH TWO OPERATING MODES - The invention relates to a system for capturing at least one image of a scene. The system comprises: an optical system, a sensor, an autofocus module for adjusting the focus of the system, and a digital processing means. The system estimates at least one value representative of the sharpness in at least one area of at least one initial captured image of a scene. The autofocus module captures the initial image with a predefined focus. On the basis of at least the value representative of the estimated sharpness, the system selects a first operating mode or a second operating mode. In the first mode, the autofocus module controls the focus of the system to capture a sharper image of the scene. In the second mode, the initial captured image or another captured image is processed by the digital processing means, the other image being captured with the predefined focus.05-24-2012
20100208127Image capturing apparatus, control method thereof, and program - An image capturing apparatus includes an image sensor obtaining a captured image of a subject, a face detection section detecting a face of the subject from the captured image, a focusing control section performing a tracking focusing operation for maintaining a state in which the face of the subject is focused on the basis of a signal obtained from a distance measuring area provided in an image capturing area, a first determination section determining whether the face of the subject is present in the distance measuring area when the face of the subject is detected by the face detection section, and a second determination section determining whether a body area in which a body corresponding to the face of the subject is expected to be present is present in the distance measuring area when the face of the subject is determined not to be present in the distance measuring area.08-19-2010
20120218461IMAGE PICKUP APPARATUS AND IMAGE PICKUP METHOD USED FOR THE SAME - An aspect of the present invention provides an image pickup apparatus, comprising: an image pickup optical system which forms an image of a subject; an imaging device which obtains an image by picking up the image of the subject via the image pickup optical system; a target detection device which detects a size of a target in the image; a first control device which controls a focus position of the image pickup optical system according to the size of the target detected by the target detection device; and a second control device which performs continuous AF that detects a focusing position where a contrast in the image reaches a local maximum by moving the focus position of the image pickup optical system, moves the focus position of the image pickup optical system to the focusing position and keeps an in-focus state.08-30-2012
20090059062IMAGING DEVICE AND AUTOFOCUSING METHOD - In a digital video camera according to one aspect of the invention, a black level of a video signal is specified during an initialization process. An autofocusing process obtains an AF evaluation value and a brightness evaluation value at each current position of a compensator lens and updates a maximum AF evaluation value and a corresponding position of the compensator lens based on the obtained data. The autofocusing process also detects an AGC gain, computes an offset value of the AF evaluation value from the detected AGC gain, the obtained brightness evaluation value, and the specified black level, and calculates a threshold value from the computed offset value and the updated maximum AF evaluation value. When the obtained AF evaluation value is less than the calculated threshold value, the lens position corresponding to the maximum AF evaluation value is specified as the focus position. When the obtained AF evaluation value is not less than the calculated threshold value, on the other hand, this series of processing is repeated with a position shift of the compensator lens by a preset number of steps. This arrangement ensures efficient and precise hill-climbing autofocus control in view of the potential influence of high frequency noise in the digital video camera or another electronic camera.03-05-2009
20100271537IMAGING APPARATUS, IMAGING METHOD, AND COMPUTER-READABLE STORAGE MEDIUM STORING PROGRAM THEREIN - An imaging apparatus is equipped with a voltage control section, which individually controls the focus distance of a lens managed on the basis of each of a plurality of pieces of management information in accordance with a predetermined control condition corresponding to each of the pieces of management information and switches the focus distance of the lens at the time of imaging at a predetermined switching period in accordance with the focus distance indicated by each piece of management information while switching the plurality of pieces of management information at the predetermined switching period.10-28-2010
20120257099DRIVER CIRCUIT FOR A CAMERA VOICE COIL MOTOR - A driver circuit for a camera voice coil motor (VCM) is described. A first power switch selectively conducts current from a VCM node to a power supply node, and a second power switch selectively conducts current from the VCM node to a power return node. A pulse width modulation circuit controls the first and second power switches. In another embodiment, a switch mode current control circuit sources VCM current alternately from the power supply node and the power return node, into the VCM node. Other embodiments are also described and claimed.10-11-2012
20120314121AUTO-FOCUS IMAGE SYSTEM - An auto-focus image system that includes a pixel array coupled to a focus signal generator. The pixel array captures an image that has a plurality of edges. The generator generates a focus signal that is a function of a plurality of edge-sharpness measures, each being measured from a different one of the plurality of edges. The edge-sharpness measure is a quantity that has a unit that is a power of a unit of length. It may be a distance in the edge. It may be an area. It may be a central moment. The generator may reduce a relative extent to which an edge contributes to the focus signal on basis of detecting that the edge does not have sufficient reflection symmetry in a sequence of gradients of an image signal across the edge according to a predefined criterion. The edge may be prevented from contributing altogether.12-13-2012
20120224096IMAGING DEVICE AND IMAGING APPARATUS - An imaging device includes a micro lens that collects light from a subject, a light sensing element that generates a signal for performing focusing determination through phase difference detection by sensing subject light collected by the micro lens, and a light blocking portion that is disposed between the micro lens and the light sensing element and performs pupil division for the subject light by blocking a part of the subject light, wherein the light blocking portion is set such that a position of an image forming point of subject light passing through the micro lens and a position of an end portion of the light blocking portion on an entrance side become distant from each other according to a variation in image height.09-06-2012
20090021632LENS CORRECTION LOGIC FOR IMAGE SENSORS - Methods of calibrating a pixel correction function for compensating for vignetting in an optical device include exposing an optical device to a reference object in order to generate pixel data of at least part of an image of the reference object. A pixel correction function is provided including a first number of unknown constant values. Pixel data of a second number of sample points is provided from the pixel data of the at least part of the image. The second number is equal to the first number or the first number plus one. The constant values are determined using the pixel data of the second number of sample points. The method allows a pixel correction function to be calibrated with a small number of sample points, thereby simplifying calibration processes for individual optical devices, and thus reducing the manufacturing costs.01-22-2009
20120262623OPTICAL APPARATUS - An optical apparatus includes: a first focus detection unit that detects a focusing condition of an image forming optical system through a first focus detection method and outputs a first focus detection signal; a second focus detection unit that detects the focusing condition of the image forming optical system through a second focus detection method different from the first focus detection method and outputs a second focus detection signal; a focus adjustment unit that executes focus adjustment for the image forming optical system based upon either the first focus detection signal or the second focus detection signal; and a notification unit that alters a focus detection method notification in correspondence to the focus adjustment that the focus adjustment unit executes.10-18-2012
20100328521APPARATUS FOR DETECTING FOCUS - An apparatus for detecting a focus state has an optical image-forming system that forms an object image, a plurality of line sensors that is arranged on a projected area of the optical image-forming system; a plurality of monitor sensors that is arranged on the projected area along the direction of a line-sensor array, each monitor sensor being adjacent to a corresponding line sensor and monitoring an amount of light incident on the corresponding line sensor; and a signal processor that outputs image-pixel signals corresponding to the object image on the basis of electric charges accumulated in the plurality of line sensors. At least an endmost monitor sensor corresponding to an endmost line sensor is arranged on the center-facing side of the endmost line sensor.12-30-2010
20120320257AUTO-FOCUS ACTUATOR FOR FIELD CURVATURE CORRECTION OF ZOOM LENSES - A wide field angle camera module that incorporates field curvature correction suitable for an electronic device is described herein. By way of example, the wide field angle camera module comprises micro optical lenses adapted to capture field angles of greater than thirty degrees, and is further adapted to provide field curvature correction for a range of object distances, and for a range of zoom configurations include 1×, 2× and 3× zoom configurations. Furthermore, the field correction can be implemented alone or in conjunction with signal processing that corrects barrel distortion introduced by the micro optical lenses. In particular aspects, the field correction can be automated based on image quality analysis to provide a high quality image for object distances substantially 30 centimeters or larger.12-20-2012
20120320258IMAGE PICKUP APPARATUS AND CONTROL METHOD THEREOF - A controller configured to move a lens to reduce a defocus amount of a focus area selected from among a plurality of focus areas, wherein the controller repeats a detection of a defocus amount while moving the lens, and performs a selection of a focus area by using face position information, which is obtained and output by the first detection unit after detection of the defocus amount is repeated a plurality of times.12-20-2012
20110037889METHOD FOR DETERMINING WHETHER AUTO-FOCUS OPERATION IS RE-EXECUTED AND IMAGE PICKUP DEVICE USING SUCH METHOD - A method for determining whether an auto-focus operation is re-executed and an image pickup device using such a method are provided. The image pickup device includes an image sensor, a register and a back-end chip. According to the automatic exposure value change amount and the automatic gain value change amount in a focusing environment, the back-end chip determines whether the auto-focus operation is re-executed.02-17-2011
20120327290OPTICAL INSTRUMENT, AND CONTROL METHOD FOR OPTICAL INSTRUMENT - An optical instrument of the present invention comprises a ring member which is arranged to be rotatable with respect to a lens barrel, and also to slide in an optical axis direction to a first position and a second position, a rotation position detection section for outputting a preset distance that has been set by a rotation operation, when the ring member is at the second position, and a control section for, when the ring member has been subjected to a slide operation between the first position and the second position, moving a photographing lens at a first speed or a second speed up to a distance corresponding to an operation position.12-27-2012
20100177236IMAGING DEVICE - An imaging device of the present invention includes a normal operation period and a focusing operation period and includes: a CCD (07-15-2010
20130016276IMAGE CAPTURING APPARATUS AND CONTROL METHOD THEREFOR - In an image capturing apparatus that carries out TV-AF type'autofocus control by setting an AF frame on a predetermined object, for example a person's face, that is detected in an image, in a case in which a in-focus position search direction cannot be determined from an AF evaluation value, changes in the size of the region of the object are detected and focus detection is carried out by determining the in-focus position search direction based on the changes in the size of the region of the object.01-17-2013
20130021520APPARATUS AND METHOD FOR AUTOMATICALLY ADJUSTING FOCUS IN IMAGE CAPTURING DEVICE - An apparatus and a method for automatically adjusting a focus in an image capturing device are provided. The method includes generating an image by capturing a subject through a lens when a flash unit is enabled, dividing the image into a plurality of windows, determining a brightest window from among the plurality of windows, and setting an Auto Focus (AF) detection area for performing an AF function centering on the determined window.01-24-2013
20080225159AUTOMATIC FOCUSING SYSTEM - A taking lens 09-18-2008
20080225158Imaging device and imaging method - An imaging device having an imaging element which takes a subject image by light from a subject passing through a photographing lens and obtains an image data, includes a filter selection device configured to select a filter transmitting an optional frequency component of the subject image; an autofocus detection device configured to detect a focus from an image data obtained by moving a focus lens to a lens position; and an acquisition timing setting device configured to set a timing of capturing the image data, the imaging device being configured to use the acquisition timing setting device in accordance with a photographing condition, and change the filter of the filter selection device in accordance with the acquisition timing set by the acquisition timing setting device.09-18-2008
20130169857SELF-CALIBRATED RINGING COMPENSATION FOR AN AUTOFOCUS ACTUATOR IN A CAMERA MODULE - Various embodiments of the present invention relate to an actuator driver in a camera module, and more particularly to methods, systems and devices of employing self-calibrated ringing compensation to improve the autofocus rate of the camera module that is driven by an actuator. Oscillation characteristics of the actuator are calibrated to control a sink current that drives the actuator during an autofocus. The actuator driver comprises a digital-to-analog converter (DAC), a filter, a current sink and a self calibration module. The self calibration module calibrates the free-oscillation frequency and damping coefficient, and accordingly, the DAC generates a voltage that may be subsequently bypassed, filtered or shaped by the filter. This voltage is further converted to the sink current by the current sink. Such self-calibrated ringing compensation allows close tracking of free oscillation, and may efficiently enhance the settling time of the lens and autofocus rate of the camera module.07-04-2013
20130113986Lens Driving Device and Lens Driving Method Thereof - A lens driving device and a lens driving method thereof The lens driving device comprises an image sensing element used to sense an image of an image pickup target; a focus lens group used to change a focus point of the image; a direct current motor used to drive and move the focus lens group; and a microcontroller electrically coupled to the image sensing element for receiving the image signal, and used to control the direct current motor to drive and move the focus lens group for changing the focus point of the image, such that a contrast ratio of the image signal will change. Also, the microcontroller calculates a contrast value according to the contrast ratio. A process of focusing is completed while the focus lens group is located at a position of a maximum contrast value corresponding to the image signal.05-09-2013
20130093943FOCUS ADJUSTMENT APPARATUS - In a focus position control apparatus, a control unit performs, when a size changing amount of an object image is larger than a predetermined amount during control for driving a focus lens according to a distance change of an object image in an optical axis direction based on a determination result of a determination unit, a following driving operation corresponding to the distance change as a driving control, and limits the following driving operation corresponding to the distance change when the size changing amount of the object image smaller than the predetermined amount. The predetermined amount is changed according to an imaging parameter and an object status.04-18-2013
20130113987FOCUS DETECTION APPARATUS AND IMAGE PICKUP APPARATUS - The focus detection apparatus includes an image pickup part (05-09-2013
20130128099AUTOFOCUS CAMERA SYSTEMS AND METHODS - A method for focusing a miniature camera includes providing a current through a coil, moving a lens of a camera based on the current to adjust a focus of the camera, and limiting movement of the lens along an optical path of the camera.05-23-2013
20130141631AUTO-FOCUS APPARATUS, IMAGE PICK-UP APPARATUS, AND AUTO-FOCUS METHOD - Disclosed is an auto-focus apparatus utilized for an image pickup apparatus having a focus ring. The auto-focus apparatus includes an evaluation value calculator periodically calculating a plurality of evaluation values for a plurality of areas of a subject image based on high frequency components of image signals of the plurality of areas of the subject image; and a control unit, after detecting that the focus ring has been stopped, performing image processing on an area of the subject image where fluctuations of the evaluation values obtained just before the focus ring has been stopped exhibit a predetermined history, based on an evaluation value obtained in the area of the subject image exhibiting the predetermined history, and outputting instruction signals for moving a focus lens base on a peak of the evaluation values obtained by the image processing.06-06-2013
20110211108METHOD AND DIGITAL IMAGING APPLIANCE ADAPTED FOR SELECTING A FOCUS SETTING - A method for selecting a focus setting for a digital image acquisition appliance, the method comprising: acquiring a first image (09-01-2011
20110211107Method to perform sobel calculations and normalization for auto-focus in a digital camera - A focus motor of a digital camera is moved to a point of focus from which image data is integrated and evaluated for sharpness and luminance. When the focus motor is stopped, a delay is initiated to allow integration of the image data from which a Sobel value and a luminance value are determined to allow the calculation of a focus value to be calculated from the ratio of the Sobel value to the luminance value. Once the focus value is calculated, the next motor position is determined from which a next focus value is determined.09-01-2011
20080198259Auto focus system - The auto focus system obtains focus information on a lens-interchangeable camera body of a TV camera and sends the focus information to a lens apparatus mounted on the camera body. The lens apparatus controls an auto focus based on the focus information. It is thereby possible to control the focus on adequate conditions according to optical specifications of the lens apparatus and so on.08-21-2008
20080198258Single lens reflex type electronic imaging apparatus - There is disclosed an electronic imaging apparatus capable of selecting a first observation mode in which a subject image is observed using an optical finder and a second observation mode in which the subject image is acquired as image data from an image pickup device and is displayed in a monitor. In this electronic imaging apparatus, subject information (e.g., a person position) recognized based on the image data from the image pickup device in the second observation mode is succeeded even in the first observation mode, and shooting conditions can be set based on the subject information even in the first observation mode.08-21-2008
20130148010AUTO FOCUSING APPARATUS AND CONTROL METHOD - The invention includes steps of setting a main area set within the frame of a photographed image signal, and a plurality of auxiliary areas each of which is smaller than the main area, selecting one or a plurality of focus detection areas from the main area and the auxiliary areas in accordance with the in-focus position of a focus lens based on the focus signals of the main area and the auxiliary areas, and controlling the focus lens to move to the in-focus position of the focus lens in the focus detection area selected in the selecting step.06-13-2013
20130182173SOLID-STATE IMAGING DEVICE AND ELECTRONIC CAMERA - A solid-state imaging device includes a second image sensor having an organic photoelectric conversion film transmitting a specific light, and a first image sensor which is stacked in layers on a same semiconductor substrate as that of the second image sensor and which receives the specific light having transmitted the second image sensor, in which a pixel for focus detection is provided in the second image sensor or the first image sensor. Therefore, an AF method can be realized independently of a pixel for imaging.07-18-2013
20120019710Autofocus control circuit, autofocus control method, and image pickup apparatus - An autofocus control circuit, includes a focusing unit determining an in-focus location of a subject image based on a contrast evaluation value of a compressed image data under a first environment, and based on a size of the compressed image data under a second environment.01-26-2012
20120019709ASSISTING FOCUSING METHOD USING MULTIPLE FACE BLOCKS - A method using multiple face blocks for assisting focusing is applicable in an image capture device. The assisting focusing method includes the following steps. A focusing image is captured individually at a focusing distance. The focusing image has a plurality of face blocks. The face blocks in the focusing image are detected. Clarities of the face blocks in the focusing image are calculated with the image capture device. A face focal length corresponding to the face block is calculated according to the clarity corresponding to the face block. A target focal length is obtained according to the face focal length.01-26-2012
20120038818FOCUSING APPARATUS, FOCUSING METHOD AND MEDIUM FOR RECORDING THE FOCUSING METHOD - Provided are a focusing apparatus for generating an image signal by converting image light incident through a focus lens to an electrical signal by an image pickup device, storing the image signal un a memory, calculating an AF evaluation value for an image signal read from the memory in a direction different from a reading direction of the image pickup device, and driving the focus lens by deriving a focus lens position corresponding to the calculated AF evaluation value, a focusing method thereof, and a recording medium for recording the focusing method. Accordingly, a focus can be correctly adjusted for various subject images, and a focus can be effectively adjusted for the images even in a high speed capturing mode.02-16-2012
20130201386IMAGE SIGNAL PROCESSING APPARATUS AND IMAGE SIGNAL PROCESSING METHOD - An image signal processing apparatus is disclosed. This device includes a divided area setup unit which sets rows and columns of divided areas in an area defined by a focal evaluation value calculation area setup unit, a high-brightness pixel presence/absence check unit which determines whether a high-brightness pixel exists in each divided area defined by the divided area setup unit, a high-brightness pixel judgment threshold setup unit which sets a threshold for use in the high-brightness pixel presence/absence checker, and an area-selective focal point evaluation value calculation unit which selects a divided area that was determined by the high-brightness pixel checker to contain no high-brightness pixels as a focal evaluation value calculation target and then calculates a focal evaluation value. Variable control of the high-brightness pixel judgment threshold that is set by the high-brightness pixel judgment threshold setup unit is started and stopped at specified timings.08-08-2013
20130201385OPTICAL APPARATUS - An optical apparatus includes an image sensor that includes a focus detecting pixel and an image pickup pixel, a first focus detector configured to provide a focus detection based upon a phase difference between the pair of image signals detected by the focus detecting pixel of the image sensor, a second focus detector configured to provide a focus detection based upon a contrast value based upon an output of the image pickup pixel of the image sensor, and a controller configured to provide autofocus utilizing the first focus detector when a focus detection precision of the first focus detector is equal to or higher than a first value and an image magnification variation amount calculated from a wobbling amount of the image pickup optical system used for the second focus detector is equal to or higher than a second value.08-08-2013
20130201387IMAGE PICKUP APPARATUS THAT MAKES MOVEMENT OF FOCUS LENS INCONSPICUOUS, AND CONTROL METHOD FOR THE IMAGE PICKUP APPARATUS - An image pickup apparatus includes a detector configured to detect an in-focus direction based on a focus signal that results from an output signal of an image pickup device by reciprocating a focus lens in an optical axis direction, and a focus controller configured to provide focusing by moving the focus lens in the in-focus direction. The focus controller is configured to set an amplitude of the focus lens when moving a center of a reciprocation of the focus lens, to be less than that of the focus lens when the center of the reciprocation of the focus lens is not moved.08-08-2013

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