Entries |
Document | Title | Date |
20080239095 | CAMERA WITH AUTOMATIC FLUORESCENT LIGHTING MODE - A novel method and apparatus for controlling operation of a photosensor array in a portable electronic device to reduce flicker resulting from fluorescent light having a periodic intensity. The method comprises selecting a time zone in which the device is to be operated, correlating the time zone with a corresponding frequency of the fluorescent light, and signaling the photosensor array to operate in accordance with a mode optimized to reduce flicker based on the selected time zone. | 10-02-2008 |
20080278603 | METHOD AND APPARATUS FOR REDUCING FLICKER OF IMAGE SENSOR - Provided is a method and apparatus for reducing flickers of an image sensor capable of reducing line flickers due to a complementary metal-oxide-semiconductor (CMOS) sensor. The method includes: estimating a profile of a light source per line on the basis of information on image frames which are continuously input; filtering information of the estimated profile of the light source with a predetermined bandwidth; normalizing the filtered information of the estimated profile of the light source, and extracting a correction gain per line; and selecting the correction gain per line repeated in units of predetermined frames, and applying the correction gain to an input image signal. | 11-13-2008 |
20080291291 | Apparatus and method for detecting flicker noise and computer readable medium stored thereon computer executable instructions for performing the method - An apparatus for detecting flicker noise disclosed in the present invention comprises an output unit for outputting a standard data for flicker noise judgment using a statistical calculation value for each calculated line based on brightness information of pixels for each line of an object image for flicker noise detection; a flicker line detection unit for detecting flicker lines, namely, lines corresponding to the standard data where the distance between the lines are within a predetermined allowance of a regular interval; and a judgment unit for comparing the number of the detected flicker lines with a standard number for flicker noise judgment to judge if the object image is a flicker noise image. | 11-27-2008 |
20080303920 | Imaging Device and Signal Processing Method - The present invention is to allow an XY-address scanning-type imaging device such as a CMOS imaging device to detect a fluorescent flicker correctly and accurately and reduce a fluorescent flicker component surely and sufficiently. The RGB primary color signals arising from A/D conversion of the RGB primary color signals obtained from an imaging element are clamped. Subsequently, for the clamped RGB primary color signals, the following processes are executed: correction of the gains of reading-out channels; reduction of fixed pattern noise; correction of the data of defective pixels; noise reduction; lens shading correction; and gain adjustment for exposure adjustment. Thereafter, for the resultant signals, a flicker detection and reduction unit | 12-11-2008 |
20080309791 | VIDEO CAMERA AND FLICKER REDUCTION METHOD IN VIDEO CAMERA - To reduce flicker appropriately according to illumination condition of an imaging subject, a video camera is provided. The video camera includes an imaging unit for generating a subject image; a superimposing image generator for generating a superimposing image; an image synthesizer for synthesize the subject image and the superimposing image to generate a synthesized image; a video signal generator for generating a video signal from the synthesized image so as to display the synthesized image. The video camera also includes a flicker reduction unit to reduce flicker caused by luminance fluctuation of a light source. The flicker reduction unit has a plurality flicker reduction modes. The mode setting unit makes the superimposing image generator to generate a settings screen as the superimposing image for assisting selection of one of the flicker reduction modes. | 12-18-2008 |
20090002520 | IMAGING APPARATUS, IMAGING METHOD, STORAGE MEDIUM STORING PROGRAM, AND INTEGRATED CIRCUIT - An imaging apparatus reduces flicker occurring under fluorescent lamp illumination in real time and also effectively reduces noise of a captured image generated by low-sensitive pixel areas fixed on an imaging surface. The imaging apparatus obtains a first image signal including no flicker element and a second image signal including a flicker element for each frame, and calculates a gain correction coefficient for eliminating the flicker element in the second image signal based on the first and second image signals, eliminates the flicker element from the second image signal based on the gain correction coefficient, and combines the first and second image signals to generate an image signal from which the flicker element has been eliminated. The imaging apparatus also effectively reduces noise of a captured image generated by low-sensitive pixel areas fixed on an imaging surface by changing the charge accumulation time of pixels depending on each frame. | 01-01-2009 |
20090033763 | Flicker Correcting Device and Flicker Correcting Method - Provided are a flicker correcting device and a flicker correcting method which are capable of reducing the frequency of occurrence of a flicker during detection of the flicker. A nonvolatile memory stores information on a power source frequency of illumination under an image pickup environment. A control unit performs a setting related to flicker correction of an image pickup unit based on the information stored in the nonvolatile memory. A signal processing circuit detects a flicker from image data acquired in the set state. The control unit writes the information on the power source frequency of illumination under the image pickup environment into the nonvolatile memory based on a result of flicker detection by the signal processing circuit. | 02-05-2009 |
20090046172 | Flare Monitoring - A computer assisted method identifies characteristics of a flare. A digital image of the flare is obtained, such as by a color digital video camera and a region of interest likely containing the flare is identified. Flare pixels within the region of interest are identified and color information is extracted from such flare pixels. The extracted color information is associated to characterizations of the flare, and an operator is provided an alert when such characterizations indicate an abnormal flare | 02-19-2009 |
20090051782 | FLICKER CORRECTING METHOD, FLICKER CORRECTING CIRCUIT, AND IMAGING DEVICE USING THEM - An arithmetic processing section executes an arithmetic process on a flicker correction signal output from a flicker correction signal outputting section and corresponding to the flicker component contained in a video signal of each of specific periods and the video signal of each of the specific periods to form a corrected video signal of the specific period corrected for the flicker component of the specific period for the video signal of each of the specific periods formed as a succession of specific periods and containing a flicker component as supplied from a video signal generating section in response to a correction error signal of each of the specific periods supplied from a correction error detecting section. | 02-26-2009 |
20090086054 | IMAGE PICKUP APPARATUS AND CONTROL METHOD THEREFOR - It is determined whether or not flicker has occurred in an image signal obtained on the basis of an output signal of an image pickup element. If it is determined that flicker has occurred, a flicker correction method is selected according to a gain value set in the image signal. | 04-02-2009 |
20090122155 | IMAGE PICKUP APPARATUS AND FLICKER DETECTION METHOD THEREFOR - An image pickup apparatus capable of accurately detecting a flicker in a short time period without regard to a state of object and a photography scene. A signal processing circuit reads out an n-th line of an image subjected to collective reset/collective transfer readout, reads out an n-th line of an image subjected to rolling readout, and subtracts an output of a pixel section of a particular column of the n-th line of the image subjected to the rolling readout from an output of a corresponding pixel section of the image subjected to the collective reset/collective transfer readout. The signal processing circuit determines that a flicker is generated, if there is a differential value not less than a predetermined threshold value between each pair of outputs from the pixel sections of the same line and if there is a periodicity in an image vertical direction. | 05-14-2009 |
20090147103 | Automatic flicker detection and correction apparatus and method in a video capture device - To automatically detect and correct flickers in a video capture device, a frame number generator receives a plurality of frames and generates frame numbers. A storage device stores brightness values of partial pixels of a frame numbered 1. An extractor extracts brightness values of partial pixels of a frame numbered N. A difference summation device computes differences of the brightness values of the partial pixels of the frames numbered 1 and numbered N and sums up the differences to generate a brightness difference summation signal. A flicker detector detects a banding value in the brightness difference summation signal. A flicker corrector uses the banding value and the frame numbers to find a fixed frequency flicker effect in the frames, and generates a flicker correction signal when the fixed frequency flicker effect in the frames is found. | 06-11-2009 |
20090167894 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes a change unit configured to change a driving state of an image sensor for capturing an image signal in response to an operation for changing the driving state of the image sensor, and a flicker correction unit configured to correct an image signal based on a flicker component detected from image signals of a frame captured a predetermined number of frames before the frame of the image signal to be corrected, wherein the flicker correction unit is configured to change the predetermined number when the driving state of the image sensor is changed by the change unit. | 07-02-2009 |
20090195671 | METHOD FOR INTEGRATING IMAGE SENSOR - Disclosed is a method for integrating an image sensor capable of removing a flicker noise without causing any burdens on a hardware due to setting up additional logics. The method for integrating an exposure time of an image sensor employing a line scan method, including the steps of: performing an integration to a first line when an integer multiple of a light source frequency is different from an integration time; and performing an integration to a second line at a phase substantially equal to a phase in which the integration to the first line is started. | 08-06-2009 |
20090219409 | Image processing apparatus, flicker reduction method, imaging apparatus, and flicker reduction program - An image processing apparatus includes: an integrating unit integrating an input image signal over a time interval equal to one horizontal period or longer; a normalizing unit normalizing an integrated value obtained by the integrating unit, or a difference value in the integrated value between adjacent fields or frames; an extracting unit extracting a spectrum of the normalized integrated value or difference value; an estimating unit estimating a flicker component on a field-by-field basis or frame-by-frame basis from the extracted spectrum; a detecting unit detecting a deviation of the latest flicker component, from the estimated latest flicker component and one or more flicker components estimated in the past; a correcting unit correcting the latest flicker component on the basis of the detected deviation of the flicker component; and a computing unit computing a corrected flicker component and the input image signal so as to cancel out the corrected flicker component. | 09-03-2009 |
20090284615 | IMAGE CAPTURE DEVICE AND METHOD THEREOF - An image capture device to eliminate flicker includes an image detection unit forming consecutive preview images at a predetermined rate, each formed with a group of parameters, and a flicker elimination unit acquiring the exposure count of the preview images, plotting the exposure count to form a waveform, determining whether the exposure count is fluctuating, analyzing the information of the waveform to allow determination of modulation of one of the group of parameters if the exposure count is fluctuating, and modulating one of the group of parameters according to the analysis result. | 11-19-2009 |
20090295940 | Interchangeable Lens, Camera Body, and Imaging Apparatus - There are provided a camera body, an interchangeable lens, and an imaging apparatus that enable to perform appropriate exposure control even when the zoom magnification is changed by a user after the camera body sets the diaphragm value of the interchangeable lens. The interchangeable lens, which includes a diaphragm and a movable lens and is mountable to a camera body, have a request signal receiving unit that receives a request signal requesting to send information on brightness of the interchangeable lens, the request signal being sent from the camera body on a frame-by-frame basis; a brightness information calculating unit that calculates information on brightness of the interchangeable lens based on states of the diaphragm and the movable lens when the request signal receiving unit receives the request signal; and a brightness information sending unit that sends the calculated information on brightness of the interchangeable lens to the camera body. | 12-03-2009 |
20090316020 | Signal processing apparatus, signal processing method, control program, readable recording medium, solid-state image capturing apparatus, and electronic information device - A signal processing apparatus according to the present invention includes: a common pre-processing section for performing signal processing common to a photographed image process and a flicker detection process on an input image signal; a photographed image processing section for performing image signal processing for a displayed image on an image signal from the common pre-processing section; a flicker detection pre-processing section for performing image signal processing for flicker detection on the image signal from the common pre-processing section; and a flicker detecting section for performing flicker detection based on the image signal from the flicker detection pre-processing section. | 12-24-2009 |
20100013953 | IMAGING APPARATUS AND FLICKER DETECTION METHOD - An exposure control unit | 01-21-2010 |
20100013954 | VIDEO CAMERA - A video camera includes an image sensor. The image sensor repeatedly outputs an object scene image captured on an imaging surface. A CPU detects a luminance component of the object scene image outputted from the image sensor, i.e., an AE/AWB evaluation value, and also detects a high-frequency component of the object scene image outputted from the image sensor, i.e., an AF evaluation value. Moreover the CPU executes a flicker determining process for determining whether or not a flicker is occurred based on the luminance component of the object scene image. However, prior to the flicker determining process, whether or not there is a dynamic object in the object scene is determined based on the high-frequency component of the object scene image. The flicker determining process is prohibited when there is the dynamic object while it is permitted when there is no dynamic object. | 01-21-2010 |
20100045819 | DETECTING ILLUMINANT FLICKER - A method of determining when an image capture device with a rolling shutter is in an environment having a flickering illuminant by using autocorrelation or frequency analysis of difference vectors produced from first and second captured images. | 02-25-2010 |
20100053369 | IMAGE TAKING APPARATUS, CORRECTION CIRCUIT AND CORRECTION METHOD - Disclosed herein is an image taking apparatus including an image taking device, a gain adjustment circuit, and a correction circuit. The image taking device operates with timings based on a frame rate determined in advance and the total number of horizontal lines, has an electronic shutter allowing a shutter speed to be adjusted, receives light in a period equal to the shutter speed of the electronic shutter and carries out an opto-electrical conversion process on the light for every horizontal line in order to generate a predetermined signal. The gain adjustment circuit adjusts the gain of the electrical signal received from the image taking device. The correction circuit compares an image taking video signal with a reference video signal to compute a flicker component as a component oriented in the vertical direction of an image represented by the image taking video signal in a flicker correction process of eliminating flickers. | 03-04-2010 |
20100060751 | Image Processing Under Flickering Lighting Conditions Using Estimated Illumination Parameters - Methods for estimating illumination parameters under flickering lighting conditions are disclosed. Illumination parameters, such as phase and contrast, of a intensity-varying light source may be estimated by capturing a sequence of video images, either prior to or after a desired still image to be processed. The relative average light intensities of the adjacently-captured images are calculated and used to estimate the illumination parameters applicable to the desired still image. The estimated illumination parameters may be used to calculate the point spread function of a still image for image de-blurring processing. The estimated illumination parameters may also be used to synchronize the exposure timing of a still image to the time when there is the most light, as well as for use in motion estimation during view/video modes. | 03-11-2010 |
20100110225 | IMAGING APPARATUS, IMAGING METHOD, STORAGE MEDIUM, AND INTEGRATED CIRCUIT - An imaging apparatus that removes horizontal bands of high-luminance noise caused by incoming flash light and outputs an image whose continuity as a moving picture is maintained. | 05-06-2010 |
20100141791 | VIDEO CAMERA - A video camera includes an image sensor. The image sensor repeatedly outputs an object scene image produced on an imaging surface having a plurality of pixels lined up in a vertical direction. A driver repeatedly executes an exposing operation for exposing the imaging surface for each pixel lined up in a vertical direction. A CPU repeatedly detects a plurality of luminance values respectively corresponding to a plurality of flicker evaluation areas allocated to the imaging surface in a manner to be located at positions different from one another in a vertical direction, based on the object scene image outputted from the image sensor. Moreover, the CPU determines the presence or absence of a flicker based on the plurality of luminance values thus detected. | 06-10-2010 |
20100157093 | IMAGING DEVICE, INTEGRATED CIRCUIT, AND IMAGING METHOD - A frame brightness detecting unit | 06-24-2010 |
20100171843 | IMAGER CAPTURING AN IMAGE WITH A ROLLING SHUTTER - An imager is provided having an image-capturing sensor, a focusing detector, and a flicker detector. The image-capturing sensor captures a subject image with a rolling shutter and outputs image data. The focusing detector determines whether a subject image is in focus of the image-capturing sensor using the output image data. The flicker detector detects a flicker in the output image data. The focusing detector uses horizontal data without vertical data from the image data so as to determine whether a subject image is in focus, when the flicker detector detects a flicker. | 07-08-2010 |
20100245619 | FLUOROSCOPY APPARATUS - A fluoroscopy apparatus includes an illumination portion irradiating an observation target with illumination light; a fluorescence image acquisition device acquires fluorescence emitted from an observation target to acquire a fluorescence image; a fluorescence image-acquisition optical system forms an image of the observation target using the fluorescence; a reference-light image acquisition device acquires returning light from the observation region to acquire a reference image; a reference-light image-acquisition optical system forms an image using the returning light; and an image correction section corrects the fluorescence image by the reference image, wherein the product of an pixel density of the reference-light image acquisition device and the image-forming magnification of the reference-light image-acquisition optical system is less than the product of the pixel density of the fluorescence image acquisition device and the image-forming magnification of the fluorescence image-acquisition optical system. | 09-30-2010 |
20110001844 | BLINK SIGNAL DETECTION CIRCUIT, BLINK SIGNAL DETECTION METHOD, OBJECT SENSING APPARATUS, OBJECT SENSING METHOD, AND IMAGING SYSTEM - There is provided a blink signal detection circuit which can clearly detect a blink signal of a blinking measurement target even if the measurement target moves. The blink signal detection circuit includes: a plurality of storage media that record image information shot by an imaging device at respective times, the image information showing a light-dark change in brightness of the measurement target which is blinking; an image information enlargement unit (pixel information enlargement circuit) that enlarges a plurality of pieces of image information at the respective different times with reference to a spatial axis, thereby generating a plurality of pieces of enlarged image information at the respective different times; and a correlation detection unit (correlation integration circuit) that performs correlation detection between the plurality of pieces of enlarged image information at the respective different times. The blink signal detection circuit detects the blink signal of the measurement target from a result of correlation detection obtained by the correlation detection unit. | 01-06-2011 |
20110025880 | FLUORESCENCE IMAGING - A method for generating a fluorescence microscopy image of a sample. The method comprises a step of obtaining a series of fluorescence microscopy images of the sample for a plurality of different focal plane depths in the sample and different exposure times. The images may be obtained directly from a microscope, or from a library of images. Images comprising the series of fluorescence microscopy images are combined to form a single resultant fluorescence microscopy image of the sample. The single resultant image may then be analyzed as if it were a conventional fluorescence microscopy image, e.g. by visual inspection or numerical processing. However, because the resultant image is based on images from a range of focal plane depths and exposure times, different structures that appear under only certain conditions (i.e. in only certain ones of the original series of fluorescence microscopy images) can appear together in a single image, thus simplifying visualization, interpretation and analysis of the sample. | 02-03-2011 |
20110025881 | VIDEO CAMERA - A video camera includes an imager. An imager outputs an object scene image produced on an imaging surface. A detector detects a plurality of luminance change amounts respectively corresponding to a plurality of timings based on the object scene image outputted from the imager. A determiner determines generation/non-generation of a flicker by referring to a difference between a sine wave depicted along a time axis and the plurality of luminance change amounts detected by the detector. A first adjuster adjusts an angular frequency of the sine wave to a frequency corresponding to a drive system of the imager. A second adjuster adjusts an initial phase and an amplitude of the sine wave based on the plurality of luminance change amounts detected by the detector. | 02-03-2011 |
20110050951 | IMAGE CAPTURING APPARATUS AND METHOD OF CONTROLLING THE APPARATUS - An image capturing apparatus and its control method for capturing a moving image. Plural movie capturing modes with different control parameters are set in accordance with an instruction from a user. One of selectable frame rates is selected in accordance with video output setting by the user. Moving image frames are generated based on the selected frame rate and a control parameter corresponding to the frame rate, and recorded as a moving image on a recording medium. | 03-03-2011 |
20110096193 | SOLID-STATE IMAGING DEVICE - According to one embodiment, a solid-state imaging device includes a pixel unit, a flicker detecting unit, a flicker-level estimating unit, and a flicker correcting unit. The flicker detecting unit detects, based on a magnitude relation of a signal amount in each of lines formed in the pixel unit, presence or absence of a flicker. The flicker-level estimating unit estimates a flicker level in each of the lines of the next frame. The flicker correcting unit corrects, for each of the lines, a flicker that occurs in a signal of an image picked up by the pixel unit. | 04-28-2011 |
20110157415 | PHOTOGRAPHIC FLICKER DETECTION AND COMPENSATION - One disclosed embodiment includes detecting flicker in a photographic setting. A plurality of samples are obtained from a light detector circuit of a camera, each of which has a value that is dependent upon intensity of light incident upon the camera. The method further includes processing the samples to identify whether the incident light is varying in intensity at one or more pre-selected frequencies. The processing may include multiplying the samples with one or more periodic signals to generate scalar product outputs, and analyzing the scalar product outputs to ascertain the presence of periodic flicker. | 06-30-2011 |
20110169981 | CAMERA WITH AUTOMATIC FLUORESCENT LIGHTING MODE - A novel method and apparatus for controlling operation of a photosensor array in a portable electronic device to reduce flicker resulting from fluorescent light having a periodic intensity. The method comprises selecting a time zone in which the device is to be operated, correlating the time zone with a corresponding frequency of the fluorescent light, and signaling the photosensor array to operate in accordance with a mode optimized to reduce flicker based on the selected time zone. | 07-14-2011 |
20110181753 | IMAGE CAPTURE APPARATUS AND ZOOMING METHOD - An image capture apparatus comprises an X-Y address scan type image sensor; a flicker detector configured to detect a flicker of a light source; a switch configured to switch the image sensor between a first state in which the image sensor is driven by a first driving method which comprises reading out a pixel signal within a range of a first angle of view and a second state in which the image sensor is driven by a second driving method which comprises reading out a pixel signal within a range of a second angle of view narrower than the first driving method; and a controller configured to control the switch so as to drive the image sensor by the first driving method while the flicker detector is detecting the flicker and to drive image sensor by the second driving method when the flicker detector has completed flicker detection. | 07-28-2011 |
20110187893 | VIDEO ARTIFACT SUPPRESSION VIA ROLLING FLICKER DETECTION - A method for suppressing banding and rolling flicker in video acquired by a video camera. The method comprises acquiring a plurality of video frames and assessing an amount of rolling flicker in the plurality of video frames. The method further comprises configuring the video camera to quiet banding and rolling flicker responsive to periodic illumination at a first frequency if the amount of rolling flicker is above a threshold, and, configuring the video camera to quiet banding and rolling flicker responsive to periodic illumination at a second frequency if the amount of rolling flicker is below the threshold. | 08-04-2011 |
20110205393 | METHOD, APPARATUS, AND COMPUTER-READABLE STORAGE MEDIUM FOR REMOVING FLICKERING IN VIDEO IMAGES OF OBJECTS ILLUMINATED BY AMBIENT LIGHTING AND SCREEN LIGHT - A method, apparatus, and computer-readable storage medium for removing flickering from a video of an object illuminated by a screen that operates on a refresh rate value (f | 08-25-2011 |
20110205394 | FLICKER REDUCTION DEVICE, INTEGRATED CIRCUIT, AND FLICKER REDUCTION METHOD - Line integration unit | 08-25-2011 |
20110221929 | IMAGING EQUIPMENT AND EXPOSURE CONTROL METHOD OF THE SAME - A flicker is caused by a light lit on a commercial AC power. An iris priority camera cannot fix a shutter thereof to a shutter speed at which no flicker occurs. Each of images picked up by a surveillance camera provides precious information. Therefore, even when the shutter is set to a high shutter speed, images devoid of an afterimage or a blue have to be picked up even from a subject which makes movements. When a decision is made that a flicker is present, the timings of applying a discharging pulse and a charge readout pulse respectively are varied depending on a field in order to implement shutter speed control in a CCD sensor, so that a camera can be exposed to a portion of light falling into the same phase thereof within a luminescence period of a lighting during each field. The CCD sensor can be exposed to the light without occurrence of a flicker even when a light source emits light while being repeatedly lit and extinguished. | 09-15-2011 |
20110221930 | IMAGING APPARATUS AND METHOD OF CONTROLLING THE IMAGING APPARATUS - An imaging apparatus includes: an imaging section that captures an image of a subject; a detection section that detects flicker of a through-the-lens image as a moving image of the subject which is obtained by image capturing of the imaging section; and a control section that, when the detection section detects the flicker, controls an aperture, a shutter speed, and a gain on the basis of through-the-lens image control values as control values for controlling the aperture, the shutter speed, and the gain so as to preferentially suppress occurrence of flicker in the through-the-lens image. | 09-15-2011 |
20110242359 | FLICKER DETECTING CIRCUIT AND METHOD IN IMAGE SENSOR - A circuit includes a luminance average value output unit for extracting luminance values from pixel data of the first and the second frames to generate first luminance average values for pixel lines of the first frame and second luminance average values for pixel lines of the second frame, a flicker curve generating unit for subtracting the second luminance average values from the first luminance average values, thereby generating a flicker curve, and a flicker detecting unit for extracting a plurality of local minimum points from the flicker curve, calculating a distance between each two neighboring local minimum points of the extracted local minimum points, and determining whether the flicker is present based on the distances and the frequency numbers of the distances. | 10-06-2011 |
20110292240 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND IMAGE CAPTURING APPARATUS - An image processing apparatus includes: a difference calculation unit that calculates a difference value of a feature amount of image data of a predetermined region between a present frame and a past frame; a first counting unit that counts number of times when an absolute value of the difference value exceeds a threshold during a predetermined period of time; a second counting unit that counts number of times when the difference value of the image data have different plus-minus signs between a present frame and a past frame during a predetermined period of time; and an identification unit that identifies a light source frequency by comparing the output of the second counting unit with a predetermined value when the output of the first counting unit exceeds a predetermined value. | 12-01-2011 |
20110292241 | EXTENDED FLICKER CANCELLATION FOR AUTO EXPOSURE FOR A VIDEO CAMERA - A video camera includes a light collection array including a plurality of light collection cells configured to collect light from a scene and a processor coupled to the light collection array. The processor is configured determine a brightness of the scene based on the light collected by the light collection array from the scene. Based on the determined brightness, the processor is configured to determine if the brightness of the scene requires a light collection time of each cell to be less than a flicker on time of a light source lighting the scene so that the light collection array collects a sufficient amount of light so that a brightness of a video stream or a still image is substantially at a predetermined level. If the light collection time is determined to be less than the flicker on time to maintain brightness of the video stream or the still image at the predetermined level and if the brightness of the scene is less than a predetermined brightness, the processor is configured to set the light collection time at the flicker on time of the light source. If the light collection time is determined to be less than the flicker on time to maintain brightness of the video stream or the still image at the predetermined level and if the brightness of the scene is at, or greater than, the predetermined brightness, the processor is configured to set the light collection time less than the flicker on time of the light source. | 12-01-2011 |
20120026358 | IMAGE PICKUP APPARATUS - An image pickup apparatus of the present invention includes an image pickup element having imaging pixels and focus detection pixels, and configured to read a signal for which a photoelectric conversion has been performed in a first direction, a focus detector capable of detecting a focus state using a phase difference of a pair of images in the first direction and a pair of images in a second direction based on outputs of the focus detecting pixels, a flicker reduction portion configured to reduce the flicker, and a controller configured to control a focal point in accordance with the focus state obtained from a phase difference of the pair of images in the first direction before an operation of the flicker reduction portion. | 02-02-2012 |
20120026359 | IMAGING DEVICE, EXTERNAL FLASH DETECTION METHOD, PROGRAM, AND INTEGRATED CIRCUIT - When capturing images of a subject with an imaging device that uses a CMOS image sensor, a white band-shaped artifact appears in the imaging signal due to the influence of a rolling shutter operation performed when an external flash has been emitted. Manipulating or removing images in which such an artifact appears requires specifying the frames in which the artifact appears. A line averaging unit ( | 02-02-2012 |
20120038789 | Determining Light Level Variation in Compressive Imaging by Injecting Calibration Patterns into Pattern Sequence - An imaging system and method that captures compressive sensing (CS) measurements of a received light stream, and also obtains samples of background light level (BGLL). The BGLL samples may be used to compensate the CS measurements for variations in the BGLL. The system includes: a light modulator to spatially modulate the received light stream with spatial patterns, and a lens to concentrate the modulated light stream onto a light detector. The samples of BGLL may be obtained in various ways: (a) injecting calibration patterns among the spatial patterns; (b) measuring complementary light reflected by digital micromirrors onto a secondary output path; (c) separating and measuring a portion of light from the optical input path; (d) low-pass filtering the CS measurements; and (e) employing a light power meter with its own separate input path. Also, the CS measurements may be high-pass filtered to attenuate background light variation. | 02-16-2012 |
20120038790 | Low-Pass Filtering of Compressive Imaging Measurements to Infer Light Level Variation - An imaging system and method that captures compressive sensing (CS) measurements of a received light stream, and also obtains samples of background light level (BGLL). The BGLL samples may be used to compensate the CS measurements for variations in the BGLL. The system includes: a light modulator to spatially modulate the received light stream with spatial patterns, and a lens to concentrate the modulated light stream onto a light detector. The samples of BGLL may be obtained in various ways: (a) injecting calibration patterns among the spatial patterns; (b) measuring complementary light reflected by digital micromirrors onto a secondary output path; (c) separating and measuring a portion of light from the optical input path; (d) low-pass filtering the CS measurements; and (e) employing a light power meter with its own separate input path. Also, the CS measurements may be high-pass filtered to attenuate background light variation. | 02-16-2012 |
20120081569 | Detection of flicker within captured imaged frames - A readout frequency of a sensor of a digital image capturing device is set based on a frequency of alternating current (AC) mains so that a readout period of the sensor of the digital image capturing device is not an integer multiple of a flicker period. The flicker period is equal to half of a period of the AC mains. A first image frame and a second image frame are captured using the sensor of the digital image capturing device. The second image frame is captured later in time than the first image frame. Whether flicker has occurred in the first and second image frames due to a periodic fluctuation of light emitted by a light source powered by the AC mains is detected by comparing a brightness of an area of the first image frame to a brightness of a corresponding area of the second image frame. | 04-05-2012 |
20120081570 | CIRCUIT FOR AUTOMATICALLY DETECTING IMAGE FLICKER AND METHOD THEREOF - A circuit for automatically detecting image flicker includes an image sensor, an average unit, a difference generation unit, a transform unit, and a flicker detection unit. The image sensor captures an image frame. The average unit generates a luminance average value according to a luminance sum of predetermined pixels of each pixel row of an image frame. The difference generation unit generates a corresponding difference according to a luminance average value of each pixel row of two consecutive image frames. The transform unit performs a discrete Fourier transform on a difference corresponding to a corresponding pixel row of the two consecutive image frames to generate a transform result. The flicker detection unit determines whether a flicker is shown in the two consecutive image frames to generate a detection result according to the transform result. | 04-05-2012 |
20120081571 | METHOD FOR FLICKER DETECTION IN IMAGE SIGNAL - The present invention provides an effective flicker detection method performing a motion compensation. The present invention includes the steps of: calculating a luminance difference between neighboring pixels; summing up the luminance difference in a specific direction if the difference is greater than a threshold value; performing a motion estimation by using a sum calculated through step (b) to thereby calculate a motion displacement; performing a motion compensation to a current frame data by using the motion displacement; calculating a difference between a previous frame data and the compensated current frame data; and detecting the flicker by using the difference calculated in step (e). | 04-05-2012 |
20120098997 | BLINKING-SIGNAL DETECTING DEVICE - A blinking-signal device | 04-26-2012 |
20120154628 | IMAGING DEVICE AND METHOD - An imaging device and method, wherein the imaging device includes an exposure controller for setting a first electric-charge accumulation time for a first scanning line of an imaging element, and for setting a second electric-charge accumulation time for a second scanning line of the imaging element; a luminance difference calculator for calculating a luminance difference in a vertical direction between a first image signal based on the first scanning line and a second image signal based on the second scanning line from a frame output from the imaging element, the vertical direction being perpendicular to a direction of the scanning lines; and a flicker detector for determining whether flicker is generated in the frame based on the luminance difference. | 06-21-2012 |
20120154629 | IMAGING APPARATUS AND IMAGING METHOD - Disclosed is an imaging apparatus with a flicker detector that restrains an increased calculation amount and image quality degradation. The apparatus includes a frame rate controller for setting a frame rate of an acquired image to a first frame rate or different second frame rate, a luminance calculator for calculating a first luminance difference between two images of a first group continuously acquired at the first frame rate and a second luminance difference between two images of a second group continuously acquired at the second frame rate, and a flicker detector for comparing the first and second luminance differences with first and second threshold, respectively, and determining whether flickers of a first frequency and a different second frequency are generated or not. | 06-21-2012 |
20120154630 | IMAGE PROSSING UNDER FLICKERING LIGHTING CONDITIONS USING ESTIMATED ILLUMINATION PARAMETERS - Methods for estimating illumination parameters under flickering lighting conditions are disclosed. Illumination parameters, such as phase and contrast, of a intensity-varying light source may be estimated by capturing a sequence of video images, either prior to or after a desired still image to be processed. The relative average light intensities of the adjacently-captured images are calculated and used to estimate the illumination parameters applicable to the desired still image. The estimated illumination parameters may be used to calculate the point spread function of a still image for image de-blurring processing. The estimated illumination parameters may also be used to synchronize the exposure timing of a still image to the time when there is the most light, as well as for use in motion estimation during view/video modes. | 06-21-2012 |
20120162466 | IMAGE PICKUP APPARATUS HAVING IMAGE PICKUP ELEMENT THAT INCLUDES PIXELS USED AS BOTH FOCUS DETECTION PIXELS AND IMAGE PICKUP PIXELS - An image pickup apparatus | 06-28-2012 |
20120188403 | FLASH BAND PROCESSING CIRCUIT, METHOD OF PROCESSING FLASH BAND, IMAGING APPARATUS, AND IMAGING PROCESSING METHOD - A flash band processing circuit includes: a flash band detecting circuit that detects a start line and an end line of a flash band, which is a level difference for each line generated within a frame in accordance with flash light, based on a difference in exposure periods of a video signal output for each frame by a pixel included in an imaging device employing a rolling shutter system. | 07-26-2012 |
20120194698 | FLICKER DETECTION FOR IMAGING DEVICES WITH HIGH FRAME RATES - Common electronic devices having imaging systems that use a rolling shutter scheme suffer from flicker due to the oscillating brightness of an illuminating light source. Some imaging systems use fast frame rates that result in less than two cycles of the illuminating light source occurring during a single frame capture. For devices that employ rolling shutter schemes and fast frame rates, a method of data collection and processing is provided that utilizes a combination of multiple sets of more than two image data frames to automatically detect flicker. Measured patterns of energy differences between various image frames and a reference image frame may be compared with an expected pattern of energy differences to determine a probability of flicker detection due to a given flicker frequency. This probability of flicker detection may be used to activate flicker avoidance procedures in an electronic device. | 08-02-2012 |
20120200735 | IMAGE-PICKUP APPARATUS AND METHOD OF CONTROLLING THE SAME - An image-pickup apparatus includes an image-pickup element including a plurality of image-pickup pixels configured to photoelectrically convert light from an image-pickup lens and to generate an image of an object, and a plurality of focus detection pixels each configured to receive light which has passed through an area of a part of an exit pupil of the image-pickup lens, a flicker correction value generator configured to generate a flicker correction value for correcting a flicker in an image signal output from the image-pickup pixels, and a flicker corrector configured to correct a flicker in a focus detection signal output from the focus detection pixels based on the flicker correction value. | 08-09-2012 |
20120200736 | FLICKER CORRECTION DEVICE, FLICKER CORRECTION METHOD AND FLICKER CORRECTION PROGRAM - An average value calculation section | 08-09-2012 |
20120229671 | IMAGING APPARATUS AND FLICKER DETECTION METHOD - An imaging apparatus including an imaging sensor, a control unit that instructs the imaging sensor to capture a first image with a first charge accumulation time and to capture a second image with a second charge accumulation time different from the first charge accumulation time, under a light source blinking at a first blink cycle, and a flicker detection unit that detects a flicker occurrence in the first or second image based on a difference in luminance between the first image and the second image. The imaging sensor captures the first image and the second image at a same shutter speed. | 09-13-2012 |
20120236174 | Methods and Systems for Flicker Correction - Techniques for detecting and addressing image flicker are disclosed. An imaging device that senses a distorted image and subsequently removes the distortion during processing can utilize an analysis module that obtains statistics indicative of image flicker prior to removing the distortion. An imaging device that features a diode for illuminating a field of view can utilize the diode as a photosensor to determine one or more flicker statistics to determine whether ambient lighting conditions are of the type that cause image flicker. | 09-20-2012 |
20120236175 | Methods and Systems for Flicker Correction - Techniques for detecting and addressing image flicker are disclosed. An imaging device that senses a distorted image and subsequently removes the distortion during processing can utilize an analysis module that obtains statistics indicative of image flicker prior to removing the distortion. An imaging device that features a diode for illuminating a field of view can utilize the diode as a photosensor to determine one or more flicker statistics to determine whether ambient lighting conditions are of the type that cause image flicker. | 09-20-2012 |
20120320232 | SPATIALLY-VARYING FLICKER DETECTION - An imaging system includes: an image module configured to produce image frames at a frame rate F, the image module being configured to capture first and second portions of each of the image frames at different times; a frequency determination module, communicatively coupled to the image module, configured to determine frequency components associated with the first and second portions over a plurality, N, of the image frames; and a flicker analysis module, communicatively coupled to the frequency determination module, configured to determine whether any of the frequency components of the first and second portions are indicative of perceptible flicker. | 12-20-2012 |
20120320233 | IMAGING APPARATUS AND FLICKER DETECTION METHOD - An imaging apparatus includes an imaging sensor, a control unit that instructs the imaging sensor to capture a first picture with a first charge accumulation time based on a light source having a first frequency and to capture a second picture with a second charge accumulation time based on a light source having a second frequency different from the first frequency, and a difference picture generation unit that generates a difference picture by using the first and second pictures. | 12-20-2012 |
20130113959 | ANTI-FLICKER CAMERA AND IMAGE CAPTURE METHOD THEREOF - Anti-flicker camera and image capture method are disclosed. According to the disclosed method, exposure integrals of different lines of an image sensed by a camera device are calculated. The exposure integrals are compared with reference exposure integrals of the plurality of lines, respectively, to calculate exposure integral offsets for the lines. The reference exposure integrals are estimated from at least one reference image. The positive and negative changes of the exposure integral offsets are statistically analyzed and, accordingly, it is determined whether there is light flicker from background illumination and an auto-exposure control module of the camera device is controlled based on the determination. | 05-09-2013 |
20130208137 | SOLID-STATE IMAGING DEVICE - According to one embodiment, a solid-state imaging device includes a pixel unit, a flicker detecting unit, a flicker-level estimating unit, and a flicker correcting unit. The flicker detecting unit detects, based on a magnitude relation of a signal amount in each of lines formed in the pixel unit, presence or absence of a flicker. The flicker-level estimating unit estimates a flicker level in each of the lines of the next frame. The flicker correcting unit corrects, for each of the lines, a flicker that occurs in a signal of an image picked up by the pixel unit. | 08-15-2013 |
20130222637 | FLICKER DETECTING APPARATUS AND METHOD FOR CAMERA MODULE - A flicker detecting apparatus for a camera module includes a processor. The processor includes a brightness values reading module, a calculating module, and a determining module. The brightness values reading module reads out a number of brightness values from a number of pixels of pictures captured by the camera module. The calculating module calculates out brightness values differences between the pixels. The determining module compares the brightness values differences with a preset value to determine whether the camera module is acceptable. | 08-29-2013 |
20130271623 | IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, AND PROGRAM - There is provided an image processing device including a first flicker component calculation unit that calculates a flicker component of a first exposure image which is a photographed image of a first exposure time, a second flicker component calculation unit that calculates a flicker component of a second exposure image which is a photographed image of a second exposure time different from the first exposure time, a first exposure image flicker correction unit that performs flicker correction on the first exposure image by applying the flicker component of the first exposure image calculated by the first flicker component calculation unit and generates a flicker-corrected first exposure image, and a second exposure image flicker correction unit that performs flicker correction on the second exposure image by applying the flicker component of the second exposure image calculated by the second flicker component calculation unit and generates a flicker-corrected second exposure image. | 10-17-2013 |
20130286245 | SYSTEM AND METHOD FOR MINIMIZING FLICKER - A method of reducing flicker in video is described. The method includes the steps of: determining an initial target frame color channel statistic value (R | 10-31-2013 |
20130293742 | APPARATUS AND METHOD FOR DETECTING FLICKER IN CAMERA MODULE - An apparatus and method for detecting flicker in a camera module is provided. The method including generating a first image frame and a second image frame, setting up a first sampling area in the first image frame and a second sampling area in the second image frame, sampling a plurality of horizontal lines from among all of the horizontal lines contained in each of the first sampling area and the second sampling area, accumulating brightness values of pixels located on each of the sampled horizontal lines to generate first accumulated brightness values for the first image frame and second accumulated brightness values for the second image frame, and detecting flicker based on the first accumulated values and the second accumulated values, wherein the first sampling area and the second sampling area have the same sizes and the same horizontal starting points but have different vertical starting points. | 11-07-2013 |
20130342726 | IMAGING APPARATUS - An imaging apparatus is provided in which a flicker is prevented. The imaging apparatus includes an imaging part that includes an optical system to form an image of a subject and an imaging element to generate an image signal by photoelectrically converting an optical image of the subject formed by the optical system, an image processing part to perform an image processing on the image signal, a display part/operation part having at least display and setting functions, a luminance change detection part to detect change of luminance of the subject, a signal processing part to calculate flicker amounts at respective frequencies based on signal intensities with respect to luminance change information acquired by the luminance change detection part, and a control unit to cause the display part/operation part to display the flicker amounts at the respective frequencies calculated by the signal processing part. | 12-26-2013 |
20140009638 | Dual-Port Measurements of Light Reflected from Micromirror Array - An imaging system and method that captures compressive sensing (CS) measurements of a received light stream, and also obtains samples of background light level (BGLL). The BGLL samples may be used to compensate the CS measurements for variations in the BGLL. The system includes: a light modulator to spatially modulate the received light stream with spatial patterns, and a lens to concentrate the modulated light stream onto a light detector. The samples of BGLL may be obtained in various ways: (a) injecting calibration patterns among the spatial patterns; (b) measuring complementary light reflected by digital micromirrors onto a secondary output path; (c) separating and measuring a portion of light from the optical input path; (d) low-pass filtering the CS measurements; and (e) employing a light power meter with its own separate input path. Also, the CS measurements may be high-pass filtered to attenuate background light variation. | 01-09-2014 |
20140043502 | FLICKER NOISE DETECTION APPARATUS, FLICKER NOISE DETECTION METHOD, AND COMPUTER-READABLE STORAGE DEVICE STORING FLICKER NOISE DETECTION PROGRAM - Provided is a flicker noise detection apparatus for detecting flicker noise in a video signal. The apparatus includes: a positional displacement detection module for detecting a positional displacement of an image across a plurality of sequential frames including, as a latest frame, a current frame of the video signal; a reference frame generation module for correcting, based on the positional displacement detected, the positional displacement of the image across the plurality of sequential frames, and generating a reference frame, based on the plurality of sequential frames corrected; and a flicker noise detection module for detecting, based on the reference frame generated and the current frame, flicker noise in the current frame. | 02-13-2014 |
20140063285 | IMAGE DATA PROCESSING APPARATUS, IMAGING APPARATUS, AND IMAGE DATA PROCESSING METHOD - Disclosed is an image data processing apparatus including a brightness detection part, a moving average calculation part, a change quantity detection part, a false correction determination part, and a correction part. The brightness detection part detects brightness of pixels in a prescribed range of each frame from image data acquired from an imaging device. The moving average calculation part calculates a moving average of prescribed cycles of the brightness to calculate a temporal average brightness value. The change quantity detection part detects a change quantity of an inclination of a waveform constituted of the temporal average brightness value. The false correction determination part determines a likelihood of false correction to the image data based on information representing a change of the inclination. The correction part corrects the image data acquired from the imaging device based on the determination result of the false correction determination part. | 03-06-2014 |
20140092277 | DEVICE AND A METHOD FOR IMAGE ACQUISITION - An image acquisition device and a method for capturing image data is disclosed. The method comprises exposing an image sensor to light from a scene, selecting substantially all rows of sensor pixels in an image sensor in a substantially random order, starting an exposure period for each row of sensor pixels in the image sensor in the order the rows were selected, buffering the rows of sensor pixels comprised in an image frame until all rows of the image frame have registered image data for the presently captured image frame, and outputting image data representing the image frame by outputting image data from each row of sensor pixels. | 04-03-2014 |
20140152867 | IMAGE PROCESSING DEVICE AND METHOD - A flash detection unit is configured to detect whether or not each frame of image data includes a high luminance portion due to a flash. A holding unit is configured to hold a past frame of the image data. A correction processing unit is configured to, if it is detected by the flash detection unit that frames include high luminance portions, correct the image data so as to consolidate a first image data and a second image data into one frame. The first image data is included in a first portion in a first frame stored in the holding unit. The second image data is included in a second portion in a second frame which is adjacent to the first frame. The first and second portions are high luminance portions. | 06-05-2014 |
20140232902 | Suppressing Flicker in Digital Images - Suppressing flicker in digital images includes deriving pixel values from a non-content area of a digital image, estimating flicker values within the non-content area, and suppressing flicker throughout the digital image based on the estimated flicker values of the non-content area. | 08-21-2014 |
20140253754 | METHOD AND SYSTEM FOR DETECTING FLICKER - An image processing system includes a plurality of active pixels and a plurality of flicker pixels. The active pixels output active pixel signals at a first readout frequency, and the flicker pixels output flicker pixel signals at a second readout frequency greater than the first readout frequency. A plurality of frequency detectors accumulate the flicker pixel signals and then perform frequency domain transformation of the accumulated flicker pixel signals. A frequency analyzer detects flicker by analyzing the flicker pixel signals which have been transformed into the frequency domain. | 09-11-2014 |
20140354847 | IMAGING APPARATUS, METHOD OF DETECTING FLICKER, AND INFORMATION PROCESSING UNIT - An imaging apparatus includes: an imaging device configured to convert light into an electric signal and to output the electric signal; an exposure control section configured to variably control an exposure period of the imaging device with use of an electronic shutter; and a flicker detection section configured to detect a flicker based on variation in an output signal from the imaging device when speed of the electronic shutter is varied from relatively-high speed to relatively-low speed. | 12-04-2014 |
20140375838 | IMAGING APPARATUS AND FLICKER REDUCTION METHOD - An imaging apparatus according to one embodiment of the present invention includes a flicker correction unit for correcting a flicker component using a correction gain. The flicker correction unit includes an integrating unit for calculating a line integrated value from a video signal in one horizontal line in one vertical synchronization period, a normalization unit for normalizing the line integrated value for a plurality of the vertical synchronization periods so as to calculate a normalized line integrated value, an inter-frame DFT processing unit for performing Discrete Fourier Transform on the normalized line integrated value for the plurality of vertical synchronization periods, a flicker component calculation unit for calculating information of a flicker component based on a Fourier Transform processing result, and a correction gain calculation unit for calculating a correction gain based on the information of the flicker component in two or more horizontal lines. | 12-25-2014 |
20150022686 | FLICKER DETECTION METHOD AND FLICKER DETECTION APPARATUS - The present invention discloses a flicker detection method and a flicker detection apparatus. The method includes: calculating the mean values of selected rows of image frames to constitute a mean value vector; calculating a differential vector between the mean value vectors of a current frame and a previous frame; calculating a DC-free difference vector by subtracting a direct current component from respective elements of the differential vector; calculating a power spectrum corresponding to the DC-free difference vector; obtaining a first frequency reference value; obtaining a second frequency reference value; and if the difference between the first and second frequency reference values is above a threshold, then it is determined that flicker is present in the current frame; otherwise, it is determined that no flicker is present. | 01-22-2015 |
20150029360 | FLICKER DETECTION METHOD AND FLICKER DETECTION APPARATUS - The present invention discloses a flicker detection method and a flicker detection apparatus. The method includes: calculating the mean values of selected rows of image frames to constitute a mean value vector; calculating a differential vector between the mean value vectors of a current frame and a previous frame; calculating a DC-free difference vector; building a first square wave and a second square wave, and a third square wave and a fourth square wave; calculating a first frequency reference value; calculating a second frequency reference value; and if the difference between the first and second frequency reference values is above a threshold, then it is determined that flicker is present in the current frame; otherwise, it is determined that no flicker is present. | 01-29-2015 |
20150085158 | Suppressing Flicker in Digital Images - Suppressing flicker in digital images includes deriving pixel values from a non-content area of a digital image, estimating flicker values within the non-content area, and suppressing flicker throughout the digital image based on the estimated flicker values of the non-content area. | 03-26-2015 |
20150116537 | IMAGE CAPTURING APPARATUS, IMAGE CAPTURING METHOD, AND CONTROL METHOD - There is provided an image capturing apparatus comprising an image capturing unit. A control unit controls the image capturing unit to capture a first image having exposure unevenness caused by flicker in a light source. A detection unit detects a timing at which there is a low change in a light amount caused by the flicker, based on the exposure unevenness in the first image. An accepting unit accepts an image capturing instruction. The control unit controls the image capturing unit to capture a second image at the detected timing in response to the image capturing instruction. | 04-30-2015 |
20150138392 | IMAGE CAPTURING APPARATUS, METHOD OF CONTROLLING THE SAME, AND STORAGE MEDIUM - An image capturing apparatus comprises an image capturing unit, a calculation unit configured to calculate light amount variation characteristics of light from an object, a photometric value determination unit configured to determine a photometry value used for determination of an exposure condition based on the light amount variation characteristics calculated by the calculation unit, and an exposure condition determination unit configured to determine an exposure condition when performing exposure of the image capturing unit at a timing set based on the light amount variation characteristics calculated by the calculation unit, based on the photometry value determined by the photometric value determination unit. | 05-21-2015 |
20150312464 | MULTI-EXPOSURE IMAGING SYSTEM AND METHOD FOR ELIMINATING ROLLING SHUTTER FLICKER - A method for eliminating flicker of a multi-exposure imaging system is provided. The method includes the steps of: capturing a long exposure image based on a long exposure from a scene; capturing a short exposure image based on a short exposure from the scene; obtaining an exposure ratio of the long exposure to the short exposure; generating a long accumulated value by accumulating pixel values of a portion of the long exposure image; generating a short accumulated value by accumulating pixel values of a portion of the short exposure image corresponding to the portion of the long exposure image; and generating a flicker gain according to the long average value, the short average value and the exposure ratio. | 10-29-2015 |
20150373249 | IMAGE CAPTURING APPARATUS, METHOD FOR CONTROLLING THE SAME, AND STORAGE MEDIUM - An image capturing apparatus includes a detection unit that detects brightness of light from an object, an XY addressing type of image sensor, a focal plane shutter having a mechanical second curtain shutter, an electronic first curtain shutter that resets the pixels in each line, and causes accumulation of charges in the pixels to start, a period detection unit that detects periodic variation in a light amount, a prediction unit that, based on the period of the variation in the light amount, predicts variation in the light amount in a predetermined exposure time, and a control unit that controls a reset time of the electronic first curtain shutter such that charge accumulation amounts of the pixels of each line fall within a predetermined range according to the variation in the light amount. | 12-24-2015 |
20150381873 | IMAGE PICKUP APPARATUS CAPABLE OF REDUCING EFFECT OF FLICKER, CONTROL METHOD THEREFOR, AND STORAGE MEDIUM STORING CONTROL PROGRAM THEREFOR - An image pickup apparatus that is capable of photographing after performing a detection process for light-amount variation characteristics and an object recognition process without increasing processing time. An accumulation unit makes an image pickup device perform a plurality of times of charge storage and charge readout at a predetermined interval to obtain a plurality of images. A photometry unit performs photometry to the plurality of images to obtain a plurality of photometry values. A detection unit detects a light-amount variation characteristic of light from an object based on the plurality photometry values. A combining unit applies a combining process to the plurality of images to obtain an combined image. An object recognition unit applies an object recognition process to detect the object in the combined image. | 12-31-2015 |
20160006919 | IMAGE PICKUP APPARATUS CAPABLE OF REDUCING INFLUENCE OF FLICKER, METHOD OF CONTROLLING THE SAME, AND STORAGE MEDIUM - An image pickup apparatus capable of reducing influence of flicker while suppressing delay of start of photographing. An image pickup device and a photometric sensor pick up images of an object. A CPU obtains images by controlling driving of one of the device and the sensor to perform charge accumulation and charge readout. Further, the CPU detects a flicker frequency and a flicker phase of a flicker light source, and stores them in a memory as first information. When photographing, if the CPU determines that the first information is not valid, an ICPU obtains images by controlling driving of the other of them to perform charge accumulation and charge readout. Further, the ICPU detects the flicker frequency and the flicker phase and stores them in a memory as second information. The CPU controls exposure timing according to the second information to perform photographing. | 01-07-2016 |
20160028933 | IMAGING APPARATUS AND CONTROLLING METHOD THEREFORE - In one shooting mode in a case where a flicker is detected by a flicker detecting unit, it is determined whether anti-flicker shooting is set, and a flicker icon is lighted and displayed on an in-viewfinder display unit in a different displaying form between when the anti-flicker shooting is set and when it is not set. In another shooting mode, in the case where the flicker is detected by the flicker detecting unit, the flicker icon is hidden. | 01-28-2016 |
20160028934 | IMAGE PICKUP APPARATUS AND METHOD OF CONTROLLING THE SAME - A mechanism which makes it possible to obtain high-quality images in continuous photographing by reducing the influence of flicker while suppressing reduction of frame speed. An image pickup apparatus includes an image pickup device and an exposure unit configured to perform exposure of the image pickup device in response to a photographing instruction. An AE sensor detects peak timing of flicker. A camera CPU switches between peak synchronous exposure in which exposure operation is performed by making the same synchronous with the peak timing of flicker and normal exposure in which exposure operation is performed without making the same synchronous with the peak timing of flicker. The camera CPU corrects a photographed image obtained by the normal exposure. The camera CPU switches between the peak synchronous exposure and the normal exposure, based on the detected peak timing of flicker. | 01-28-2016 |
20160037045 | MULTI-EXPOSURE VIDEO - Certain cameras and systems described herein produce enhanced dynamic range still or video images. The images can also have controlled or reduced motion artifacts. Moreover, the cameras and systems in some cases allow the dynamic range and/or motion artifacts to be tuned to achieve a desired cinematic effect. | 02-04-2016 |
20160037047 | IMAGE CAPTURING APPARATUS, METHOD FOR CONTROLLING THE SAME, AND STORAGE MEDIUM - An image capturing apparatus comprises an image sensor, a driving unit configured to drive the image sensor, and a detection unit configured to detect a variation in amount of light within one frame image based on a plurality of image signals obtained by driving the image sensor with different accumulation periods by the driving unit. | 02-04-2016 |
20160073001 | IMAGING APPARATUS, CONTROL METHOD, AND PROGRAM - At least one imaging apparatus includes a sensor configured to output a signal according to an incident light amount, a calculation unit configured to calculate an evaluation value in regard to a flicker based on the output signal from the sensor, a notification unit configured to notify a user of information about a presence of the flicker based on the evaluation value, and a control unit configured to control processing for reducing an influence of the flicker based on the evaluation value. When the evaluation value is equal to or larger than a first threshold value, the notification unit notifies the user of the information about the presence of the flicker. When the evaluation value is equal to or larger than a second threshold value which is larger than the first threshold value, the control unit performs control to carry out processing for reducing the influence of the flicker. | 03-10-2016 |
20160255264 | DISPLAY DETECTION FOR AUGMENTED REALITY | 09-01-2016 |
20220141375 | Vehicle Vision LED Flicker Interference Mitigation System - A light emitting diode (LED) flicker mitigation system disposed on a vehicle captures multiple images of an exterior scene to determine whether a light that appears to be off is actually off, or whether the state of the light is actually on but erroneously shown in the system image captures as off due to temporal aliasing. The LED flicker mitigation system may obtain information from external infrastructure and contact other vehicles proximate to the captured scene to determine the true state of the LED light source by identifying homography using the vehicle image captures, infrastructure information, and vehicle sensors. The images may be shared amongst the vehicles to correctly determine the LED status and correct any erroneous LED state information. | 05-05-2022 |