Class / Patent application number | Description | Number of patent applications / Date published |
348671000 | Gray scale transformation | 85 |
20090141176 | GRAY-SCALE CORRECTING DEVICE - An amount of change calculated by an amount-of-change calculator ( | 06-04-2009 |
20100110301 | Image processing apparatus, image processing method, and communication system - An information processing apparatus includes: a processing system performing processing on an original image; and a gradation conversion section having a gradation conversion function of receiving image data from the processing system, converting a number of bits of the image data, and expressing pseudo grayscales before the gradation conversion in a grayscale converted image, the gradation conversion section being capable of changing the gradation conversion function and performing conversion processing on the image, wherein the gradation conversion section adds and outputs a determination flag indicating whether the gradation conversion processing has been performed at the time of outputting the image data. | 05-06-2010 |
20100118204 | Method For Automatic Exposure Control Within A Video Capture Device - On embodiment of the present invention sets forth a technique for automatically computing exposure parameters for a digital video camera (DVC) system. The exposure parameters include exposure gain, analog gain, and digital gain. Each frame is analyzed with respect to an image luma value. Exposure gain and analog gain are adjusted to reduce differences between a target image luma value and measured image luma values over sequential frames. Digital gain is adjusted with respect to each frame to reduce visually abrupt changes in sequentially captured video frames. | 05-13-2010 |
20100208142 | SYSTEM AND METHOD FOR A VERSATILE DISPLAY PIPELINE ARCHITECTURE FOR AN LCD DISPLAY PANEL - A video processing system comprising a video frame buffer memory, a first video pipeline, a second video pipeline, a blender, and an overdrive processing unit. The video frame buffer memory has a first memory region and a second memory region, the first memory region being configured to store a first video data frame and the second memory region being configured to store a second video data frame. The first video pipeline is coupled to the video frame buffer memory and configured to receive and process the first video data frame. The second video pipeline is coupled to the video frame buffer memory and configured to receive and process the second video data frame. The blender is coupled to the first and second video to pipelines and is configured to receive and blend the processed first video data frame and the processed second video data frame in a first mode of operation and to provide the blended processed first and second video data frame to a display. The overdrive processing unit is coupled to the first and second video pipelines, and is configured to receive the processed first video data frame and the processed second video data frame in a second mode of operation, to modify the processed first video data frame based upon pixel values of the processed second video data frame, and to provide the modified processed first current video data frame to the display. | 08-19-2010 |
20110051006 | VIDEO PROCESSING CIRCUIT, VIDEO PROCESSING METHOD, LIQUID CRYSTAL DISPLAY APPARATUS, AND ELECTRONIC APPARATUS - Provided is a video processing circuit which designates an applied voltage, which is to be applied to a liquid crystal element of each pixel, based on a video signal, including: a first boundary detection portion which analyzes a video signal of a current frame and detects a boundary between a pixel, to which an applied voltage near a maximum grayscale is applied, and a pixel, to which an applied voltage near a minimum grayscale is applied, based on the video signal; a second boundary detection portion which analyzes a video signal of a frame preceding the current frame and detects a boundary between the pixel, to which the applied voltage near the maximum grayscale is applied, and the pixel, to which the applied voltage near the minimum grayscale is applied, based on the video signal; and a correction portion which corrects the applied voltage to a voltage which provides an initial tilt angle to a liquid crystal molecule in a case where the applied voltage designated with the video signal of a pixel adjacent to a portion changed from the boundary detected by the second boundary detection portion among the boundaries detected by the first boundary detection portion is lower than the voltage which provides the initial tilt angle to the liquid crystal molecule. | 03-03-2011 |
20110075043 | COLOR SHIFT SOLUTION FOR DYNAMIC CONTRAST RATIO IN A LIQUID CRYSTAL DISPLAY - In one aspect, the present invention relates to a method of processing images. In one embodiment, the method includes the steps of processing an image having a plurality of image pixels expressed in grey level values, GL | 03-31-2011 |
20110181786 | DISPLAY DEVICE AND ELECTRONIC APPARATUS - To provide a display device whose display can be recognized even in dark places or under the strong outside light. The display device performs display by controlling the number of gray scales in accordance with the intensity of outside light, which means a display mode can be switched in accordance with the data to be displayed on the display screen. A video signal generation circuit is controlled in each display mode in such a manner that it directly outputs an input video signal with an analog value, outputs a signal with a binary digital value, or outputs a signal with a multivalued digital value. As a result, gray scales displayed in pixels are timely changed. Accordingly, clear images can be displayed while maintaining high visibility in various environments, in the wide range from, for example, dark places or indoors (e.g., under a fluorescent lighting) to outdoors (e.g., under the sunlight). | 07-28-2011 |
20110267541 | DISPLAY APPARATUS - A display apparatus capable of reducing unevenness in color resulting from the viewing angle property of a curved portion of a seamless lens is provided. The display apparatus is provided with the seamless lens on the front side of a display surface. The display apparatus includes: a video signal input portion for inputting a video signal; and an image conversion portion for subjecting, for each horizontal line, of display images obtained from video signals inputted by the video signal input portion, those corresponding to a curved portion of the seamless lens to image conversion. | 11-03-2011 |
20120008050 | VIDEO PROCESSING APPARATUS AND VIDEO PROCESSING METHOD - A video processing apparatus includes a property change acquisition unit for acquiring a change of a property of an input video, a video processing unit for performing video processing on the input video, a gain adjustment unit for adjusting a gain for the video processing, and a control unit for performing control to change a setting for the video processing in the video processing unit according to the property change of the input video and decrease a gain of the gain adjustment unit at a timing of changing the setting for the video processing. | 01-12-2012 |
20120044423 | VIDEO DATA PROCESSING APPARATUS AND CONTRAST CORRECTING METHOD - A video data processing apparatus includes: a contrast correction calculating section correcting the contrast of input luminance data by performing a calculation using a contrast correction value; an error diffusion section performing an error diffusion process on the luminance data whose contrast has been corrected; an error diffusion setting section setting whether to perform the error diffusion process at the error diffusion section; a correction value setting section detecting black and white peak values of an input luminance signal and setting the contrast correction value using the detected black and white peak values; and a correction amount adjusting section adjusting the contrast correction value set by the correction value setting section depending on whether the error diffusion process is performed at the error diffusion section according to an instruction from the error diffusion setting section and supplying the adjusted contrast correction value to the contrast correction calculating section. | 02-23-2012 |
20120257115 | METHOD AND APPARATUS FOR WIRELESS IMAGE TRANSMISSION TO A PROJECTOR - A method and apparatus is provided in which a digital image is transmitted to a presentation projector resource over a wireless transmission medium using a reduced amount of bandwidth by transmitting a subset of the digital image data. The subset of image data may be a delta subset that represents those areas of the image that have changed since the previous transmission. The subset image data may also be a scalable vector graphics representation of the subset of the digital image. A projector discovery logic selects a suitable projector resource based on the order or signal strength of the discovery replies. A wireless image transmission session is established with the selected projector resource during which the projector is unavailable to other devices. The subset image data may be compressed and transmission coordinated with the projector resource so that the data is sent only when it is ready to be received. | 10-11-2012 |
20140118622 | DCT BASED BLACK FRAME DETECTION USING VARYING BLOCK SIZE - A video detector that detects black frames in a video includes a grayscale converter, a parser for parsing the grayscale video into a sequence of individual frames, a sub-frame parser for parsing frames of an uneven block size into two or more sub-frames, and a DCT calculator. The detector extracts a DC component or AC component, or both, of the generated DCT and then compares them against respective threshold values. The individual frames are identified as a black frame based on a comparison between the selected component and the threshold value. Methods of detecting black frames based on DC components and AC components are also described. | 05-01-2014 |
348672000 | Using histogram | 11 |
20090021648 | HISTOGRAM EQUALIZER AND HISTOGRAM EQUALIZATION METHOD - A histogram equalizer and histogram equalization method is provided. A histogram equalizer, including: a memory; and an operation unit which reads first data and second data from the memory, and then overwrites the second data of the memory with a summed value, the summed value being obtained by summing the read first data and the read second data. | 01-22-2009 |
20090059081 | HISTOGRAM DETECTOR FOR CONTRAST RATIO ENHANCEMENT SYSTEM - The disclosed embodiments relate to a system and method for processing a video signal, comprising assigning pixels from a set of pixels to at least one of a plurality of bins based on a brightness level associated with each pixel of the set of pixels, each of the plurality of bins containing pixels having a brightness level above or below a specified value, and identifying a coarse horizon value corresponding to a first one of the bins that includes a number of pixels corresponding to a brightness level. | 03-05-2009 |
20090115907 | IMAGE DISPLAY APPARATUS AND IMAGE DISPLAY METHOD - An image display apparatus includes an image displaying unit that includes a light source unit and a light modulation device, a histogram generating unit, a light source luminance calculator, a function storing unit, a first evaluation value calculator, a second evaluation value calculator, a third evaluation value calculator, a function acquiring unit and a control unit. The function acquiring unit acquires a plurality of the third evaluation values by repeating processing by the first to third evaluation value calculators with modification to a level conversion function and acquires a level conversion function that has a smallest third evaluation. The control unit supplies a signal of a converted video resulting from conversion of the image with the acquired level conversion function to the light modulation device. | 05-07-2009 |
20090167956 | IMAGE PROCESSING APPARATUS, VIDEO RECEPTION APPARATUS, AND IMAGE PROCESSING METHOD - According to one embodiment, a video display apparatus having a smoothing processing unit inputs luminance signals of pixels which form an image, acquires histogram data by counting the numbers of pixels for respective levels of the input luminance signals, sets a correction amount for a change amount of the levels of luminance signals based on the acquired histogram data, corrects the change amount of the levels of luminance signals near a pixel to be processed based on the correction amount, and corrects the level of the input luminance signal for the pixel to be processed using the corrected change amount of the levels of luminance signals. | 07-02-2009 |
20090213271 | Video Signal Processing Device and Video Signal Processing Method - According to one embodiment, an extraction module that extracts a high frequency component of a luminance signal, an acquisition module that acquires band histogram data according to amplitude levels with respect to one frame from the high frequency component of the luminance signal, a control module that applies gain control for contour correction processing based on a gain value provided from outside to the luminance signal, and a generation module that generates a gain value to be provided to the control module on the basis of the acquired band histogram data are included. | 08-27-2009 |
20090244386 | HISTOGRAM AND CHROMINANCE PROCESSING - The present invention relates to a method and corresponding system for improving the perceived visual quality of images for instance displayed on a colour television screen. According to the invention, there is provided a means for carrying out histogram processing ( | 10-01-2009 |
20100134689 | DYNAMIC CONTRAST ON DISPLAYS USING AVERAGE PICTURE LEVEL AND HISTOGRAM ANALYSIS - Average picture level (APL) of a display and, in examples, histogram information is used to dynamically adjust the display contrast, or “gamma”, using an exponential function. APL can also be used for DC transmission adjustment and black/white stretch. | 06-03-2010 |
20110267542 | IMAGE PROCESSING APPARATUS AND CONTROL METHOD THEREOF - An image processing apparatus comprises: an acquisition unit that divides an inputted video image into a plurality of divisions, and acquires a histogram of each of the divisions; a generation unit that generates a gradation conversion curve for each of the divisions; a determination unit that determines whether or not the inputted video image is a multi-screen video image; and a gradation correction unit that performs a smoothing process in accordance with a pixel position, to correct the gradation of the video image in each of the divisions using the gradation conversion curve of each of the divisions, wherein when the inputted video image is the multi-screen video image, the determination unit detects a position of a boundary between the plurality of video image contents, and the gradation correction unit does not perform the smoothing process within a predefined area from the boundary. | 11-03-2011 |
20110267543 | PICTURE SIGNAL PROCESSING APPARATUS AND PICTURE SIGNAL PROCESSING METHOD - According to one embodiment, a picture signal processing apparatus comprises an acquisition unit which acquires histogram data on each luminance level from luminance signals for one frame, a frequency converter unit which eliminates histogram data that corresponds to a no-image portion displayed so as to occupy a predetermined region in a screen from among the acquired histogram data, a creation unit which creates a nonlinear correction processing table for applying a nonlinear correction processing to the input luminance signal on the basis of the histogram data subjected to a frequency conversion processing, and a processing unit which applies a nonlinear correction processing to the input luminance signal on the basis of the created nonlinear correction processing table. | 11-03-2011 |
20120038830 | DYNAMIC CONTRAST ON DISPLAYS USING AVERAGE PICTURE LEVEL AND HISTOGRAM ANALYSIS - Average picture level (APL) of a display and, in examples, histogram information is used to dynamically adjust the display contrast, or “gamma”, using an exponential function. APL can also be used for DC transmission adjustment and black/white stretch. | 02-16-2012 |
20130182185 | IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, IMAGE PROCESSING PROGRAM, AND RECORDING MEDIUM - An image processing device ( | 07-18-2013 |
348673000 | Combined contrast control and brightness or DC level control | 16 |
20080252791 | IMAGE PROCESSING DEVICE AND METHOD, AND PROGRAM - An image processing device extracting a contrast component for each pixel of an input image by removing a low-frequency component of the input image and correcting the contrast component for each pixel based on a gain value, including: an input/output-property generating unit for generating an input/output-property curve, assuming an input contrast component which is the pre-correction contrast component as input, and an output contrast component which is the post-correction contrast component as output, which is an input/output-property curve of which the output contrast component monotonously increases as to the input contrast component; a gain properties generating unit for generating a gain property curve representing properties as to the input contrast component of the gain value for correcting the input contrast component to obtain the output contrast component based on the input/output-property curve; and a gain-value calculating unit for calculating the gain value for each pixel of the input image based on the gain property curve. | 10-16-2008 |
20080259217 | Dynamic Softclipping of Video Levels - A method for improvement of contrast in an image shown on a display having a range of displayable video levels. The method comprises providing input video levels representing the image, said levels being within said displayable range; providing a transfer function ( | 10-23-2008 |
20090002562 | Image Processing Device, Image Processing Method, Program for Image Processing Method, and Recording Medium Having Program for Image Processing Method Recorded Thereon - An image processing device for processing input image data includes a contrast correcting section. The contrast correcting section corrects the input image data using image data of a gradient image, which has a luminance gradient in which a luminance level gradually changes, to make a luminance level of the input image data similar to the luminance level of the gradient image. | 01-01-2009 |
20090002563 | LIGHT-LEAKAGE-CORRECTION TECHNIQUE FOR VIDEO PLAYBACK - Embodiments of a system that includes one or more integrated circuits are described. During operation, the system compensates for gamma correction in a video image to produce a linear relationship between brightness values and an associated brightness of the video image when displayed, where the compensation includes an offset at minimum brightness that is associated with light leakage in a display that is configured to display video images. Then, the system calculates an intensity setting of a light source based on at least a portion of the compensated video image, the light source configured to illuminate the display. Next, the system adjusts the compensated video image so that a product of the intensity setting and a transmittance associated with the adjusted video image approximately equals a product of a previous intensity setting and a transmittance associated with the video image. | 01-01-2009 |
20090027558 | Apparatus and Method for Rendering High Dynamic Range Images for Standard Dynamic Range Display - The method, system and apparatus embodiments of the present invention provide for rendering original images having high dynamic range into display images having lower dynamic range while retaining a visual quality of rendered images comparable to the original or reference images. Tone-mapping parameters are applied to the display images and are iteratively adjusted in order to reduce the differences between the conditioned original image and the conditioned display image. | 01-29-2009 |
20090059082 | METHODS AND SYSTEMS TO TRANSMIT, VIEW, AND MANIPULATE MEDICAL IMAGES IN A GENERAL PURPOSE VIEWING AGENT - An apparatus may include a processor configured to determine a first value for a center of brightness and a second value for a window width for contrast. The processor may further be configured to process a first image to generate a second image having a reduced bit-depth based at least in part upon the determined first and second values. The processor may additionally be configured to provide the second image to a remote device to facilitate viewing and manipulation of the second image in a general purpose viewing agent. Corresponding methods, computer program products, and systems are also provided. | 03-05-2009 |
20090161020 | MANAGEMENT TECHNIQUES FOR VIDEO PLAYBACK - Embodiments of a system that includes one or more integrated circuits are described. During operation, the system may determine an intensity setting of the light source based on at least a portion of a video image, such as the portion of the transformed video image that includes spatially varying visual information in the video image. Moreover, the system may modify the video image so that a product of the intensity setting and a transmittance associated with the modified video image approximately equals a product of a previous intensity setting and a transmittance associated with the video image. For example, the modification may include scaling brightness values in the transformed video image. Next, the system may identify a region in the video image in which the scaling of the brightness values results in a visual artifact associated with reduced contrast. For example, the region may include a bright region surrounded by a darker region. Then, the system may reduce the scaling of the brightness values in the region to, at least partially, restore the contrast, thereby reducing the visual artifact. Additionally, the system may spatially filter the brightness values in the video image to reduce a spatial discontinuity between the brightness values of pixels within the region and the brightness values in a remainder of the video image. | 06-25-2009 |
20110051007 | VIDEO PROCESSING CIRCUIT, PROCESSING METHOD THEREOF, LIQUID CRYSTAL DISPLAY APPARATUS AND ELECTRONICS DEVICE - A video processing circuit for specifying an applied voltage that is applied to a liquid crystal included in each pixel on the basis of a video signal, the video processing circuit includes a correction unit configured to, if the applied voltage specified by the video signal is a voltage of a level lower than a voltage level that is sufficient to an extent that can provide liquid crystal molecules with initial inclination angles, perform correction so that the applied voltage has a voltage level that is sufficient to an extent that can provide the liquid crystal molecules with initial inclination angles. | 03-03-2011 |
20110141371 | METHOD FOR ADJUSTING IMAGE - A method for adjusting image is applied to an image output device. According to the method, the image output device firstly obtains a current image frame including plural pixels, and analyzes an intensity of an input image signal value of each pixel. The image output device defines each pixel having the input image signal value being smaller than a critical value as a dark pixel, and counts a number of the dark pixels to obtain a ratio of the dark pixels among all the pixels to serve as a dark pixel ratio. The image output device determines an image adjusting curve equation according to the dark pixel ratio, substitutes the input image signal values to the image adjusting curve equation, and obtains output image signal values of the pixels. Finally, the image output device combines all the output image signal values to obtain a final output image frame. | 06-16-2011 |
20110181787 | IMAGE DETAILS PRESERVATION AND ENHANCEMENT - The appearance of image details can be preserved and/or enhanced by applying contrast adaptive gain to the high spatial frequency component of the luminance information. The image details in bright and/or dark regions can be further boosted by applying a local mean adaptive gain. The contrast transfer mapping curve for luminance contrast enhancement can be re-scaled to account for the applied gain. The re-scaling may be performed from frame to frame of displayed video. The re-scaling may be temporally controlled for subsequent frames to make the re-scaling change gradually to prevent flickering. | 07-28-2011 |
20110205442 | DISPLAY DEVICE, BRIGHTNESS ADJUSTMENT DEVICE, BACKLIGHT DEVICE, METHOD OF ADJUSTING BRIGHTNESS, AND PROGRAM - Provided is a display device including a current-brightness table calculation unit ( | 08-25-2011 |
20110298985 | METHODS FOR ENHANCING THE STABILITY AND CONTRAST RATIO OF THE DISPLAY DEVICE - A method of enhancing a contrast ratio of a picture of a display device, comprising steps of providing the display device having a light source; continuously receiving plural display signals; and turning off the light source when the display device has a buffer time during which each of the continuously received plural display signals has a picture brightness equal to zero. | 12-08-2011 |
20110317074 | DISPLAY DEVICE AND CONTRAST ENHANCEMENT METHOD THEREOF - A display device and a contrast enhancement method thereof are disclosed. The display device includes a display panel on which data lines and gate lines are positioned, a data driving circuit for driving the data lines, a scan driving circuit for driving the gate lines, a timing controller for controlling the data driving circuit and the scan driving circuit, and a data modulation circuit including a local modulation circuit and a global modulation circuit. The local modulation circuit maps luminance components of input digital video data to a luminance transfer curve selected or generated for each pixel based on an average picture level (APL) of each pixel and perform a first modulation on the luminance components of the input digital video data so as to expand a gray level distribution of a specific portion of an input image. | 12-29-2011 |
20120242904 | DISPLAY APPARATUS - Provided is a display apparatus that performs an adjustment of brightness of a backlight on a per block basis based on a video signal and displays, by using the backlight, an image based on the video signal. The display apparatus includes an adjustment portion that performs an adjustment of a color gain or sharpness with respect to the video signal, and a color gain level or a sharpness level to be achieved by the adjustment for each block is determined in accordance with a degree of the adjustment of brightness performed in the each block. | 09-27-2012 |
20130070157 | ELECTRONIC DEVICE WITH TOUCH PANEL - An electronic device includes a power management unit, a touch panel including a first touch area and a second touch area, a first indicator, a second indicator, and a processing unit. The first touch area and the second touch area are respectively located on two sides of the touch panel, and is used to produce touch signals in response to a user's touch. The position of the first indicator and a second indicator are respectively corresponding to the first touch area and the second touch area. The processing unit controls the power management unit to provide power to the first indicator only when determining the first touch area is touched by the user according to the touch signals received by it, and control the power management unit to provide power to the second indicator only when determining the second touch area is touched. | 03-21-2013 |
20130070158 | TOUCH INPUT DEVICE AND ELECTRONIC DEVICE USING THE SAME - A touch input device is provided. The touch input device includes a touch panel and a touch control. The touch panel includes a number of touch sensor groups, each touch sensor group includes a line of touch sensors, each touch sensor produces a touch signal in response to a user's touch, the touch sensor groups are arranged on the touch panel one by one along a predetermined path, the quantity of touch sensors of each touch sensor group is increased or decreased gradually, and the arrangement direction of the touch sensors of each touch sensor group is perpendicular to the direction of the predetermined path. The touch control is connected to the touch panel and is used to receive the touch signals produced by the touch sensor, and determine a touch path according to the changes of the quantity of the received touch signals. | 03-21-2013 |
348674000 | Nonlinear amplitude modification (e.g., gamma) | 29 |
20080239157 | Memory Efficient Gamma Correction For Multiple Display Devices - One embodiment is directed to a gamma correction unit. The gamma correction unit includes a first and at least one second lookup table. In addition, the gamma correction unit includes a first and at least one second selecting circuits, and at least one combining circuit. The first lookup table may store a reference function. Each reference function value may be M bits. The first selecting circuit selects a reference function value in the first lookup table that corresponds with a particular input value. The at least one second lookup table may store a difference function. Each difference function value may be no more than N bits, where M is greater than N. The at least one second selecting circuit selects a difference function value in the second lookup table that corresponds with the particular input value. The at least one combining circuit combines the selected reference function value with the selected difference function value to produce an output value that corresponds with the particular input value. | 10-02-2008 |
20090009665 | Image processing apparatus, image processing method and program - An image processing apparatus according to an embodiment of the present invention includes a correction interval setting unit for setting a correction interval; a correction interval dividing unit for dividing the correction interval into a black side interval and a white side interval; histogram calculating units for calculating a total number of luminance histograms of the black side interval and the white side interval, respectively; gain setting units for setting gains of a γ curve for raising the luminance and a γ curve for lowering the luminance, respectively; gamma curve generating units for generating a gamma curve for raising the luminance and a gamma curve for lowering the luminance, respectively; a gamma curve combining unit for combining the gamma curve for raising the luminance and the gamma curve for lowering the luminance; and a luminance conversion unit for performing the luminance conversion process using the combined gamma curve. | 01-08-2009 |
20090027559 | Video signal processing apparatus performing gamma correction by cubic interpolation computation, and method thereof - A video signal processing apparatus includes a non-equidistant section determination circuit, a sample data register, and an interpolation computation circuit. The non-equidistant section determination circuit detects a non-equidistant section having different intervals between plural sample points set for the dynamic range of a video signal to be inputted. The sample data register holds the signal level (correction level) of a video signal after correction for each sample point. The interpolation computation circuit obtains the signal level of the video signal after correction by executing cubic interpolation computation with reference to the correction level. Here, a first section is defined as a section located on a lower signal level side and having intervals of X (X>0) between sample points, and a second section is defined as a section located on a higher level side and having intervals of Y (Y>0, X≠Y) between sample points. With respect to the border point between the first and the second sections, the interpolation computation circuit obtains the signal level of the video signal after correction by use of the correction level of a sample point added so that the second section can be formed on the lower level side and/or the first section can be formed on the higher level side. | 01-29-2009 |
20090040389 | Gamma correction apparatus - A gamma correction apparatus includes a load controlling unit, a non-volatile memory, a volatile memory, a checking unit and a counter. The non-volatile memory stores gamma data and a checking code. The load controlling unit controls an operation of loading the gamma data from the non-volatile memory into the volatile memory. The checking unit receives the checking code and detects whether the gamma data in the volatile memory have an error according to the checking code. The counter accumulates the number of times that the checking unit has detected the error. When the checking unit detects the error, the load controlling unit re-loads the gamma data from the non-volatile memory into the volatile memory. | 02-12-2009 |
20090051818 | VIDEO SIGNAL PROCESSING DEVICE, VIDEO SIGNAL PROCESSING METHOD AND DISPLAY DEVICE - A video signal processing device includes a sample data register to hold a signal level of a video signal after correction at each sample point as a correction level, a coefficient operation circuit to output a first coefficient, a coefficient selection circuit to output a second coefficient, and an interpolation operation unit to calculate a signal level of a video signal after correction corresponding to a signal level of the input video signal by using the correction level held in the sample data register, the first coefficient or the second coefficient and performing the cubic interpolation operation or the linear interpolation operation. The first coefficient is used when a video signal after correction is obtained from the input video signal by a linear interpolation operation. The second coefficient is used when a video signal after correction is obtained from the input video signal by a cubic interpolation operation. | 02-26-2009 |
20090059083 | IMAGE DISPLAYING METHOD, IMAGE DISPLAYING DEVICE, AND CONTRAST-ADJUSTING CIRCUIT FOR USE THEREWITH - A system provides an image displaying technique that provides stable high contrast even in an area having high brightness. Based on information about an average brightness level of a digital luminance signal, black-correction processing which decreases a brightness level by offsetting the brightness level to the minus side, and increase processing which increases a contrast gain within a dynamic range, are performed for an analog luminance signal or a digital luminance signal, enabling improvement in contrast even where brightness is intense. | 03-05-2009 |
20090086102 | Signal processing apparatus and signal processing method performing gamma correction - A difference sample data holder of a gamma correction device holds as difference sample data a difference between a corrected signal level and a yet-to-be-corrected signal level for each of multiple sample points set at equal intervals between the permissible minimum and maximum levels of an input video signal. A correction execution unit performs cubic interpolation operation using the difference sample data held in the difference sample data holder, and adds the operated result and the signal level of the input video signal to obtain the signal level of the corrected video signal. | 04-02-2009 |
20090128705 | VIDEO PROCESSING APPARATUS AND GAMMA CORRECTION METHOD THEREOF - Provided is a video processing apparatus comprising a storage unit and a gamma correction unit. The storage unit stores a plurality of representative values of brightness to perform a gamma correction to a video signal. The gamma correction unit calculates a difference value between two adjacent representative values among the plurality of representative values, and performs gamma correction on the video signal based on the plurality of representative values and the plurality of difference values. | 05-21-2009 |
20090213272 | VIDEO PROCESSING APPARATUS AND METHOD FOR PROCESSING VIDEO SIGNAL - A video processing apparatus includes: a video processor that detects a video type based on an inter-frame difference of a video signal; an automatic image quality adjustment unit that determines an image quality adjusting set value based on the video type detected by the video processor; and an image quality processing unit that performs an image quality adjustment on the video signal based on the image quality adjusting set value, the image quality adjustment including at least one of processes selected from a group of: a brightness enhancement control; an RGB gain control for setting a color temperature; a brightness control; a color enhancement control; a color gain and color tone control; and a nonlinear contrast control. | 08-27-2009 |
20090244387 | Display device and driving method thereof with improved luminance - A display device and a driving method thereof in which if an input 2D/3D video signal is a 2D video signal, an image data signal is generated by applying a first gamma correction curved line. If the input 2D/3D video signal is a 3D video signal, an image data signal is generated by applying the second gamma correction curved line. Luminance of a maximum grayscale of the first gamma correction curved line is set to be lower than luminance of a maximum grayscale of the second gamma correction curved line. Therefore, it is possible to prevent luminance of the display device from deteriorating by a barrier in a 3D driving mode. | 10-01-2009 |
20100141844 | RELATIVE EXPOSURE VALUE MEASURING APPARATUS AND METHOD - Disclosed is a method which comprises the steps of providing a video-signal output device ( | 06-10-2010 |
20100171884 | Video processing apparatus - A final-correction-value acquisition unit performs, for each frame, reduction processing for reducing a difference in gamma correction value between frames and thereby acquires a final correction value of the frame. The final-correction-value acquisition unit determines into which type an observed frame is classified among a first-, a second- and a third-type frames, and controls a level of the reduction processing on the observed frame according to a determined type of the observed frame, the first-type frame being a frame having a change amount obtained from a change-amount calculator equal to or smaller than a predetermined threshold, the second-type frame being a frame having a change amount larger than the threshold and at least one frame having a change amount larger than the threshold exists within a preceding predetermined period immediately before the observed frame, the third-type frame being a frame other than the first- and second-type frames. | 07-08-2010 |
20100201887 | METHOD AND APPARATUS FOR HARDWARE-EFFICIENT CONTINUOUS GAMMA CURVE ADJUSTMENT - In accordance with at least one embodiment, a first representation of a first gamma curve is stored in a look-up table, a second representation of a second gamma curve is stored in a look-up table, and a video signal is modified in accordance with an interpolation of at least a portion of the first representation of the first gamma curve and at least a portion of the second representation of the second gamma curve. In accordance with at least one embodiment, the at least a portion of the first representation of the first gamma curve is multiplied by a one's complement of a normalized weight factor, the at least a portion of the second representation of the second gamma curve is multiplied by the normalized weight factor, and the results are added together to obtain an output video signal. | 08-12-2010 |
20100328537 | SYSTEM AND METHOD FOR BACKLIGHT AND LCD ADJUSTMENT - In one embodiment the present invention includes a display system for displaying video. The display system includes a backlight layer and an LCD layer. The display system controls the backlight layer and the LCD layer to emulate a cathode ray tube response. This emulation may be accomplished by applying a gamma function to a gamma corrected input signal. In this manner, the effects resulting from the “crushed blacks” phenomenon may be reduced. | 12-30-2010 |
20110043704 | IMAGE DISPLAY DEVICE, IMAGE DISPLAY METHOD, AND IMAGE PROCESSING DEVICE - An image display device includes: an image projecting unit for externally performing enlargement projection of a main-image signal; a basic-property selecting unit for selecting a predetermined basic-gamma property from multiple basic-gamma properties of the main-image signal; a correction-property selecting unit for selecting a predetermined correction-gamma property from multiple correction-gamma properties of the main-image signal; a gamma-property calculating unit for calculating a gamma property for each signal level of the main-image signal based on the selected basic-gamma and correction-gamma properties; a gamma correcting unit for subjecting the main-image signal to gamma correction based on the calculated gamma property; an operating unit for outputting a first signal corresponding to a user's basic-gamma-property selection operation, and a second signal corresponding to a user's correction-gamma-property selection operation; and a control unit for controlling each of the selection operations of the predetermined basic-gamma and correction-gamma properties based on the first and second signals. | 02-24-2011 |
20110096238 | IMAGE DISPLAY APPARATUS AND IMAGE DISPLAY METHOD - An image display apparatus of the present invention includes: a picture display unit that forms and displays an optical image based on a video signal; a gamma adjustment image display unit that displays a gamma adjustment image containing input/output characteristics of a signal level of the video signal in the displayed optical image; an adjustment operation unit that changes the displayed input/output characteristics on the image; and an input/output characteristics setting unit that sets input/output characteristics of the signal level of the video signal in accordance with the input/output characteristics changed on the image. The adjustment operation unit includes a point selecting part that selects an adjustment point desired to be changed in the input/output characteristics displayed in the image and a level changing part that is capable of changing both of an input level and an output level of the selected adjustment point. Because both of an input signal level and an optical output level can be adjusted, a user can make gamma adjustment easily, freely, and in detail. | 04-28-2011 |
20120002114 | SYSTEM AND METHOD FOR USING PARTIAL INTERPOLATION TO UNDERTAKE 3D GAMMA ADJUSTMENT OF MICRODISPLAY HAVING DYNAMIC IRIS CONTROL - In a microdisplay TV with dynamic iris control, interpolation is used to undertake 3D gamma adjustment of the display for intermediate brightness levels. | 01-05-2012 |
20120194745 | DISPLAY DRIVING CIRCUIT - A display driving circuit comprising a video signal transformation circuit, a reference voltage generating circuit, a DAC and an interpolation operational amplifier is provided. The video signal transformation circuit transforms an input video signal into a transformed video signal with a higher bit depth. The transformed video signal comprises an upper n bits data and a lower m bits data, wherein n+m equals a bit depth of the transformed video signal. The reference voltage generating circuit generates reference voltages. The DAC selects a first reference voltage and a second reference voltage to interpolation operational amplifier from the reference voltages according to an upper n bits data of the transformed video signal. The interpolation operational amplifier outputs a driving voltage to display device according to the first reference voltage, the second reference voltage and the lower m bits data of the transformed video signal. | 08-02-2012 |
20120300128 | Systems and Methods for Mitigating Visible Envelope Effects - Systems and methods in accordance with embodiments of the present invention are provided to compensate for the “envelope effect” that appears to an end user as a result of the sampling and digital processing of near-Nyquist frequency components of a video information signal. Embodiments of the present invention improve image quality by effectively nullifying gamma correction in areas where the envelope effect exists, enabling the human eye to perceive the displayed signal without the envelope effect. | 11-29-2012 |
20130120659 | GAMMA CORRECTION SYSTEM AND METHOD FOR DISPLAY DEVICE - A gamma correction system and method for a display device are disclosed. According to one aspect, the gamma correction system includes a display panel configured to display an image, a measuring unit configured to acquire optical characteristic information from the image displayed on the display panel, and a display panel driver configured to convert a gamma data result value obtained after performing optical compensation for at least two sample gray values among a plurality of reference luminance values into a corresponding data voltage and calculate a data voltage for the rest of the luminance values for which optical compensation is not performed. | 05-16-2013 |
20150146107 | Methods to Reduce Bit-Depth Required for Linearizing Data - Media is usually encoded using a non-linear transfer function that approximates human perception to more efficiently allocate codes to areas of dynamic range where human observers are more easily able to perceive differences in signal strength. Many common media operations, e.g., scaling, rotating, and gamut converting, must be performed in a linear representation to be correct and artifact-free. The non-linear transfer functions used are often pure-power functions, such as “gamma” functions. To avoid banding after transformation, as many as 17 bits are needed in the linear-space with 8-bit input. Thus, methods, computer readable media, and systems for reducing the number of bits required in the linear domain are described herein that substitute a piecewise linear function (e.g., a line segment followed by an offset curve) for a pure-power gamma function, such that a slope limit is applied to constrain the number of (additional) linear bits required (over the input precision). | 05-28-2015 |
20160050402 | DISPLAY DEVICE AND OPERATION METHOD THEREOF AND IMAGE DISPLAY SYSTEM - A display device is provided including a timing controller configured to output a test image signal, a data driver configured to output a plurality of data voltages corresponding to the test image signal; and a display panel configured to display a test image corresponding to the data voltages, wherein the timing controller includes a first processor configured to output the test image signal in response to a test signal, and a second processor configured to receive luminance information of the test image, correct a predetermined reference gamma voltage corresponding to the test image with reference to the received luminance information, and output the test signal, which corresponds to the reference gamma voltage, to the first processor. | 02-18-2016 |
20160127736 | ENCODING AND DECODING METHODS FOR ADAPTING THE AVERAGE LUMINANCE OF HIGH DYNAMIC RANGE PICTURES AND CORRESPONDING ENCODER AND DECODER - A method for encoding a sequence of high dynamic range pictures is disclosed. The method comprises for each picture of the sequence:
| 05-05-2016 |
348675000 | Color television | 5 |
20090180031 | GAMMA VOLTAGE DRIVING CIRCUIT AND RELATED METHOD - A Gamma voltage driving circuit includes a setting circuit, a Gamma voltage generator, and a plurality of voltage output modules. The setting circuit respectively outputs a plurality of Gamma voltage setting signals at different time slots. The Gamma voltage generator respectively transforms the plurality of Gamma voltage setting signals into a plurality of corresponding voltage levels. The plurality of voltage output modules respectively provides voltage outputs at different time slots. Each voltage output module includes a plurality of voltage output circuits and a plurality of output control circuits. Each voltage output circuit includes a voltage selecting unit and an output buffering unit. The output control circuit controls the voltage output circuit to selectively output Gamma voltages. | 07-16-2009 |
20100103322 | TARGET DISPLAY FOR GAMMA CALIBRATION - User interfaces are provided that allow for the display of a target element that may be used to adjust a gamma value of a display device. The target element includes three layers. A bottom static layer is alternating light and dark lines, which in one instance may be black and white lines of equal height. A gray static layer is solid gray, and overlays some or all of the bottom static layer. A progressive layer gradually changes from a fully transparent are to an opaque area, and overlays some or all of the gray static layer. Additionally, a manipulation area is provided, which may be a sliding mechanism. The user may adjust the gamma to a higher value when the fully transparent area appears lighter than the opaque area, and may adjust the gamma to a lower value when the fully transparent area appears darker than the opaque area. | 04-29-2010 |
20100157161 | Gamma Correction Apparatus and Method - According to one embodiment, a gamma correction apparatus comprises a histogram module configured to acquire histograms of upper and lower portions of one frame which are obtained by dividing the frame into two by a given horizontal scanning line, and a correcting module configured to make gamma correction on a current frame based on the histogram of the upper portion of the current frame and the histogram of the lower portion of a preceding frame. | 06-24-2010 |
20130021528 | Image Transmission and Display Method Comply with Chromaticity and Visual Fidelity Principle - This invention discloses an image transmission and display method complies with both chromaticity and visual fidelity principles. It is in the technical field of image transmission and display. In order to totally eliminate factors that affect image reproduction fidelity during process of image transmission and reproduction on display devices (including channel independence and space independence of three primary colors, red-shift effect, gamma correction, methods to generate brightness information and chromatic difference information, gamma correction for all kinds of display devices), this invention created a set of mathematical models and methods. With the invention, data flows are processed complying with both chromaticity and visual fidelity to ensure hues of reproduced image on display device remain unchanged, gray is reproduced accurately and chromaticity coordinates ratio remains unchanged as well. This is a universal method to ensure fidelity for image transmission and display, and can be widely applied on televisions, computers and mobile telecommunication devices. Furthermore, it provides support of chromaticity and methodology for color management system, design and development of associated software and hardware, and system which is a combination of digital high definition television and computer. | 01-24-2013 |
20150103252 | SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR GAMMA CORRECTION IN A VIDEO OR IMAGE PROCESSING ENGINE - A system and method are provided for generating a gamma adjusted value. The method comprises generating a logarithm space representation of an input value by computing a logarithm of the input value, computing a logarithm space gamma-adjusted value by multiplying the logarithm space representation with a current gamma value, and generating the gamma adjusted value by computing an antilogarithm of the logarithm space gamma-adjusted value. | 04-16-2015 |
348677000 | With specified DC level control | 1 |
20080239158 | ADAPTIVE GAMMA VOLTAGE SWITCHING METHOD AND DEVICE USING THE SAME - An adaptive Gamma voltage switching method and a device using the same is presented. An equalization unit utilizes a video data to obtain an equalized luminance data. An adaptive Gamma voltage switching core dynamically adjusts a Gamma voltage and outputs the adjusted Gamma voltage to a panel according to the equalized luminance data so as to enable the panel to alternately display a black insertion frame and a dynamic frame with adaptive contrast. The present invention not only enhances frame contrast but also reduces frame blur, and furthermore improves the insufficient luminance caused by black insertion. | 10-02-2008 |
348678000 | Automatic range control (e.g., AGC, automatic contrast control) | 17 |
20080225178 | AUTOMATIC SIGNAL GAIN CONTROL METHOD AND APPARATUS - Provided are an automatic signal gain control method and apparatus that adaptively controls signal gain according to sync tip depths in a video receiving system. The method includes: detecting a sync signal from a video signal; detecting a blank level and a sync tip level from a sync section of the sync signal; extracting a difference between the blank level and the sync tip level, as a sync tip depth; and controlling the gain of the video signal differently according to a variation of the sync tip depth. | 09-18-2008 |
20090079873 | APPARATUS FOR AND METHOD OF PROCESSING IMAGE SIGNAL AND DISPLAY APPARATUS - Provided are an apparatus for and a method of processing an image signal, a program, and a display apparatus. The apparatus includes: a sub frame generating unit outputting an input signal a plurality of times in one frame period and generating a plurality of sub frames in the one frame period; a correlation judging unit judging a correlation between a current frame which is represented by the input image signal for every sub frame and a preceding frame for every corresponding pixel; and a frame distributing unit adjusting a gain of an image signal corresponding to each pixel for every sub frame on the basis of the correlation judged by the correlation judging unit, and outputting the image signal adjusted for every sub frame in a period corresponding to each of the sub frames. | 03-26-2009 |
20090141177 | AUTOMATIC GAIN CONTROL CIRCUIT USING GAIN SHIFT - An AGC circuit includes a RF amplifying module has a first gain control resolution, a frequency converter, an IF/Baseband amplifying module has a second gain control resolution, an IF/Baseband micro-setting amplifying module has a third gain control resolution which is higher than the first and the second, an A/D converter, an AGC module and a gain distribution module. The AGC module is configured for detecting a level of a digital IF/Baseband signal outputted from A/D converter, comparing the detected level with a reference level and generating a digital AGC signal and a digital gain distribution control signal based upon the comparison result. The gain distribution module is subjected to the control of digital AGC signal and digital gain distribution control signal and configured for generating digital gain control signals to selectively adjust the gains of RF amplifying module, IF/Baseband amplifying module and IF/Baseband micro-setting amplifying module. | 06-04-2009 |
20090153740 | ANTENNA FOR VEHICLES - An antenna for vehicles includes a first AGC unit and a second AGC unit. The first AGC unit determines the strength of a signal, which is input to the input stage of an amplifier without passing through a transistor. Depending on the determination result, the first AGC unit attenuates the signal and output the attenuated signal to the transistor. When a signal having a value equal to or greater than a reference value is input to the input stage, the second AGC unit operates so as to output the signal without passing through the transistor. According to the antenna, both signals in a strong electric field area and signals in a weak electric field area close to the strong electric field area can be effectively controlled. | 06-18-2009 |
20090201426 | Dynamic RF AGC switch/mixer for optimal NTSC video detection - This disclosure presents an apparatus and method for automatic gain control correction for a television signal in which the Radio Frequency (RF) and Intermediate Frequency (IF) power signal levels are collected for a band of channels, identifying a channel having a strong RF power signal level and an IF gain signal level that is lower than a nominal IF gain signal level, comparing the identified channel RF gain signal level with the RF gain signal level of adjacent channels to identify the relative power signal levels of the channel and associated adjacent channels, and applying correction to the channel wherein there is an imbalance in the RF and IF power signal levels of the identified channel. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract. | 08-13-2009 |
20090207311 | TECHNIQUE FOR TUNER AUTOMATIC GAIN CONTROL CIRCUIT FOR MOBILE TELEVISION APPLICATIONS - A technique for providing stable tracking performance to an AGC loop circuit comprises amplifying a wideband radio frequency signal; detecting signals and blockers adjacent to the radio frequency signal; lowering a gain of the radio frequency signal; mixing a local oscillator signal with the radio frequency signal; shifting a frequency of the radio frequency signal from a radio frequency to an intermediate frequency; continuously varying a gain of the intermediate frequency signal; converting the intermediate frequency signal into a digital output signal; comparing the digital output signal with predefined thresholds comprising an upper threshold and a lower threshold; switching a post mixer amplifier (PMA) to a high gain state when an input of a variable gain amplifier (VGA) is greater than the upper threshold, and switching the PMA to a low gain state when an input of the VGA is lower than the lower threshold. | 08-20-2009 |
20090310026 | AUTOMATIC GAIN CONTROL CIRCUIT - An AGC circuit is provided which includes a first AGC detector circuit that switches whether the AGC voltage is output or not, a second AGC detector circuit that always outputs the AGC voltage, a first resistor with a high impedance compared to a tuned frequency of which one end is connected to an output port of the first AGC detector circuit and the other end is connected to an output port of the second AGC detector circuit, and a switching element that is provided between the other end of the first resistor and a ground, in which an output source that outputs the AGC voltage to the amplifier can be switched to the first AGC detector circuit or the second AGC detector circuit by an On/Off operation of the switching element. | 12-17-2009 |
20100002148 | IMAGE SIGNAL PROCESSING APPARATUS, IMAGE SIGNAL PROCESSING METHOD, COMPUTER PROGRAM, AND DISPLAY DEVICE - An image signal processing apparatus and method of controlling the light emission state of each pixel in a display device are provided. The image signal processing apparatus includes a correlation determination unit which determines a correlation between a current frame and a previous frame, and outputs a correlation signal of a signal level according to a determination result; a light emission time setting unit which outputs a light emission time control signal that defines a light emission time in one frame period, based on the correlation signal; an adjustment value setting unit which outputs an adjustment value that adjusts a gain of the image signal, based on the correlation signal; and a gain adjustment unit which adjusts the gain of the image signal based on the adjustment value and outputs the image signal of which the gain is adjusted. The light emission intensity is uniform regardless of the determination result. | 01-07-2010 |
20100060797 | AUTOMATIC GAIN CONTROL WITH IMPROVED CROSS-MODULATION - An apparatus such as a television signal receiver provides an AGC function which reduces cross-modulation distortion. According to an exemplary embodiment, the apparatus includes a source of an input signal and a gain control circuit coupled to the source of the input signal. The gain control circuit provides a first control signal at a first level to a first amplifier while a magnitude of the input signal is within a first range and provides the first control signal at a second level to the first amplifier while the magnitude of the input signal is within | 03-11-2010 |
20100208143 | APPARATUS AND METHODS FOR BOOSTING DYNAMIC RANGE IN DIGITAL IMAGES - A method for increasing dynamic range of original image data representing an image comprises applying an expansion function to generate from the original image data expanded data having a dynamic range greater than that of the original image data and, obtaining an expand map comprising data indicative of a degree of luminance of regions associated with pixels in the image. The method then combines the original image data and the expanded data according to the expand map to yield enhanced image data. Apparatus for boosting the dynamic range of image data comprises a dynamic range expander that produces expanded data, a luminance analyzer that produces an expand map and a combiner that combines the original and expanded data according to a variable weighting provided by the expand map. | 08-19-2010 |
20100225822 | DIGITAL RECEIVER AND METHOD THEREOF - A digital receiver includes an analog front-end circuit, an automatic-gain controller, a compensation circuit, and a demodulator. The analog front-end circuit receives an input signal, adjusts an average amplitude of the input signal, and converts the adjusted input signal to generate a digital signal according to a control signal. The automatic-gain controller is coupled to the analog front-end circuit for generating the control signal feedback to the analog front-end circuit according to the digital signal. The compensation circuit is coupled to the analog front-end circuit for detecting an average amplitude of the digital signal to generate a detecting result and for determining whether to compensate the average amplitude of the digital signal to generate a compensated digital signal according to the detecting result. The demodulator is coupled to the compensation circuit for demodulating the compensated digital signal to generate an output signal. | 09-09-2010 |
20100231801 | AUTOMATIC GAIN CONTROL CIRCUIT - An automatic gain control (AGC) circuit based on a cascade of a step automatic gain control unit and a second automatic gain control unit connected to adjust their gain in a synchronized manner to result in a combined impulsive gain variation. Hereby it is possible, e.g. to use a step automatic gain control unit instead of a continuous automatic gain control unit in an RF part of a TV tuner without resulting in visual artifacts—this applies both for digital and analog TV tuners. According to a preferred embodiment, the synchronization between the two automatic gain control units may be achieved by the first automatic gain control unit generating a control signal upon gain adjustment, this control signal serving to speed up a loop bandwidth controlling gain change of the second automatic gain control unit. In another embodiment, the control signal generated by the first automatic gain control unit is used to control a gain step of the second automatic gain control unit. In addition, the invention provides a tuner with an automatic gain control unit as mentioned, and a device, e.g. a TV or a hard disc recorder with such tuner. | 09-16-2010 |
20110051008 | IMAGE PROCESSING APPARATUS FOR IMPROVING CLARITY AND IMAGE PROCESSING METHOD - An image processing apparatus for improving clarity and an image processing method are provided. An image processing apparatus includes an image receiving unit, and an image processing unit which allows luminance of an image to be within a preset range of luminance and adjusts clarity of the image. Accordingly, the problem that the luminance exceeds a digital value may be prevented, and clarity of the image may be effectively improved. | 03-03-2011 |
20120019728 | Dynamic Illumination Compensation For Background Subtraction - A method of processing a video sequence in a computer vision system is provided that includes receiving a frame of the video sequence, computing a gain compensation factor for a tile in the frame as an average of differences between background pixels in the tile and corresponding pixels in a background model, computing a first difference between a pixel in the tile and a sum of a corresponding pixel in the background model and the gain compensation factor, and setting a location in a foreground mask corresponding to the pixel based on the first difference. | 01-26-2012 |
20120162529 | AUTOMATIC VIDEO GAIN ADJUSTMENT METHOD - An automatic video gain adjustment method in which an automatic gain equalizer is used. The method includes steps of: using a processor to read and analyze a video signal and compare the video signal with a standard value to judge whether the video signal matches the standard value; using a gain regulator to automatically adjust the amplitude of the video signal in case the video signal fails to match the standard value, the gain regulator then generating an adjusted video signal; and using the processor to receive the adjusted video signal and transmit the adjusted video signal to a remote-end receiving device. By means of the automatic video gain adjustment method, the video signal can be automatically and more conveniently adjusted to match the standard value. | 06-28-2012 |
20130083248 | ELECTRONIC APPARATUS AND VIDEO PROCESSING METHOD - According to one embodiment, an electronic apparatus includes a block feature amount calculator, a local contrast correction curve generator and a contrast correction module. The block feature amount calculator divides pixels in a video frame into blocks, and calculates feature amounts corresponding to the blocks using luminance values of pixels in each of the blocks. The local contrast correction curve generator generates local contrast correction curves corresponding to the blocks using the feature amounts. The contrast correction module generates a corrected video frame using the local contrast correction curves. | 04-04-2013 |
348682000 | Sync or blanking | 1 |
348683000 | Noise reduction or elimination | 1 |
20140313417 | CONTROL DEVICE, CONTROL METHOD AND PROGRAM - An information processing apparatus includes a processor that receives captured image data and captured sound data corresponding to an environment in which content is reproduced and detects a user based on the captured image data and analyzes a situation of the environment based on a result of the detection and the captured sound data and controls an audio volume corresponding to reproduced content based on a result of the analyzing. | 10-23-2014 |