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337 results about "Colour cast" patented technology
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A colour cast is a tint of a particular colour, usually unwanted, which affects the whole, or portion, of a photographic image evenly. Certain types of light can cause film and digital cameras to have a colour cast. Illuminating a subject with light sources of different colour temperatures will usually cause colour cast problems in the shadows. In general, the human eye does not notice the unnatural colour, because our eyes and brains adjust and compensate for different types of light in ways that cameras cannot.
System and method for controlling dynamically interactive parameters for image processing
InactiveUS20060066628A1Promote resultsGood image editing result2D-image generationCathode-ray tube indicatorsImaging processingColor correction
A system and related techniques generate and present a set of linked, dynamically interactive image processing controls for image editing and optimization tasks. In embodiments a user interface may present a set of global editing modes such as color manipulation, exposure correction or others. Each mode may contain a hierarchical set of basic, intermediate and advanced controls such as one-button automatic fixes, color or saturation sliders or editable histograms or other curves. When a user wishes, for instance, to achieve a warmer color balance or perform other color-correction tasks, the system may automatically detect adjustments in one or more parameters, such as CMYK values, and automatically adjust the values of other parameters to enhance the intended correction or action. For instance when the magenta content on a CMYK slider is increased, the color saturation may be slightly increased or color temperature may be slightly raised, to create a warmer appearance in the color cast of the image. Other combinations of image parameters may be linked. According to embodiments, a set of editable curves such as histograms or gamma curves may be dragged or otherwise adjusted or manipulated by users, and saved for re-application to other images or at other times.
Owner:MICROSOFT TECH LICENSING LLC
Urban rail transit panoramic monitoring video fault detection method based on depth learning
InactiveCN106709511AImprove robustnessImprove generalization abilityCharacter and pattern recognitionNeural architecturesData setModel testing
The invention provides an urban rail transit panoramic monitoring video fault detection method based on depth learning. The method comprises a data set construction process, a model training generation process and an image classification recognition process. The data set construction process processes a definition abnormity video, a colour cast abnormity video and a normal video in an urban rail transit panoramic monitoring video. A training set and a test set are classified. The model training generation process comprises model training and model test. The model training is to train a fault video image recognition model based on a convolution neural network. The convolutional neural network comprises a plurality of convolution layers and a plurality of full connection layers. The model test is to calculate the test accuracy. If expectation is not fulfilled, the fault video image recognition model is optimized. The image classification recognition process comprises the steps that a single-frame image to be recognized is input into the model, and the fault video image recognition model outputs an image classification result to complete the fault image detection of the urban rail transit panoramic monitoring video.
Owner:HUAZHONG NORMAL UNIV +1
Low-quality image enhancement method under extreme weather conditions
The invention relates to a low-quality image enhancement method under extreme weather conditions. According to the method, as for an inputted single image, the image is converted to a CIE-Lab color space; a color cast factor D is set; according to experience, if D is smaller than 1.4, the image is a clear image which does not require processing; if D is larger than 1.4, the image is a degraded image; whether the image is a dust image or a haze, rain and snow image is judged according to chrominance component values; if the image is in a haze, rain and snow image, an improved dark primary color priori algorithm is adopted to process the image; if the image is a dust image, a gamma-corrected contrast limited adaptive histogram equalization algorithm is adopted. With the method adopted, problems in the prior art can be well solved. The effects of the method are greatly improved compared with the in the prior art, and the popularization and application of the method can be benefitted.
Owner:SHENYANG POLYTECHNIC UNIV
System and method for recording teaching video
ActiveCN103428461AEfficient removalAvoid redundancyTelevision system detailsColor television detailsComputer graphics (images)Engineering
The invention relates to a system and a method for recording a teaching video. The system comprises a camera sub-system, a tracking sub-system, a recording sub-system, an editing sub-system. The method comprises the steps of: setting a template; shooting in the whole scene; analyzing a panoramic picture; sending out a command of starting up tracking; tracking; acquiring; triggering; switching; recording; and editing. A recording template and an intelligent triggering and switching device adopted in the invention can remove useless scenes efficiently, edit the teaching video based on a teaching scene language, carry out multiple after-treatments such as automatic color cast adjustment and de-noising by using the editing sub-system, and also can add individual openings and endings, so that automatic edition of the teaching video is realized, and a person without any professional training can edit well. The method for recording the teaching video realizes teacher tracking stability as a safety frame strategy is adopted, removes useless scenes of excessive actions of students by using a student action anti-interference strategy, and avoids redundancy of the teaching video.
Owner:BEIJING SHINEON TECH
Double-camera picture pick-up system and white balance adjustment method and device thereof
ActiveCN103402102AReduce chance of color castColor signal processing circuitsPicture signal generatorsColor shiftReference Region
The invention discloses a double-camera picture pick-up system and a white balance adjustment method thereof, and relates to a picture pick-up system and a white balance adjustment method thereof. The double-camera picture pick-up system comprises a main camera and an auxiliary camera, wherein the main camera acquires a main picture, and the auxiliary camera acquires an auxiliary picture with a scene that is different from that of the main picture; and the main picture is subjected to white balance adjustment according to a white balance adjustment gain value obtained by the auxiliary picture. The white balance adjustment method disclosed by the invention comprises the following steps of acquiring the auxiliary picture through the auxiliary camera, and performing white balance adjustment on the main picture acquired by the main camera according to the white balance adjustment gain value obtained by the auxiliary picture. When the main camera is used for picking up a pure-color scene, the main camera is subjected to white balance adjustment by taking a white region in the picture acquired by the auxiliary camera as a white balance adjustment reference region, so that the probability of color shift caused in the process of picking up the pure-color scene can be greatly reduced.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Retinex-based fast nighttime fog image restoration method
ActiveCN106251300AOvercoming the halo effectSimple methodImage enhancementIlluminanceContrast enhancement
The present invention relates to a Retinex-based fast nighttime fog image restoration method. According to the method, a single color image of nighttime fog is processed, so that the visual perception for the color image can be clear; the illuminance images of each color component are estimated through adopting a guided filter with an edge-preserving property, and local contrast coefficients are calculated; Otsu threshold segmentation is performed on a maximum value channel image of the original image; the Gamma parameters of each pixel are estimated adaptively; Gamma correction and contrast preservation are carried out on the illuminance images; a brightness enhanced image is transformed into an HSV space; contrast enhancement is carried out on a brightness channel V through a CLAHE algorithm; and the image is transformed into an RGB space, so that a restored image can be obtained. The method of the invention has universality. With the method adopted, the definition of a defogged image can be effectively improved, the color cast phenomenon of the image can be corrected effectively, the details of the enhanced image are clear, and the colors of the enhanced image are natural.
Owner:HUAQIAO UNIVERSITY
Method for detecting color cast of video image based on Lab chrominance space
InactiveCN103402117ATrue reflection of color castColor signal processing circuitsTelevision systemsComputer graphics (images)Gradation
The invention relates to a method for detecting the color cast of a video image based on Lab chrominance space. The method comprises the following steps: a) converting RGB (Red Green Blue) color space into the Lab chrominance space; b) calculating color cast factors. The invention provides a new color cast detecting factor, which is successively used for detecting the color cast of the image. First, the image is converted from the original RGB color space into the Lab chrominance space; then according to the distinction of the spatial gray level histogram distribution of a chrominance and b chrominance between a normal image without color cast and an abnormal image with color cast, the mean value of the spatial gray level histogram distribution of the a chrominance and the b chrominance are respectively calculated; then according to the statistical distribution between the mean value and the mid value of histograms, the color factors are calculated. A lot of experiments of real street view image databases prove that the new color cast detecting factor disclosed by the invention can really reflect the degree of color cast of images so as to complete color cast detection. The method has the advantages of high detection speed and accurate precision.
Owner:湖南乐泊科技有限公司
Method for correcting digital tongue picture colour cast
This invention relates to a digital correction method of tongue color deflection, the feature is as the following steps: making white equation emendation on the image of Macbeth color adjusting calibration card from flash lamp and switching to the tonality, saturation, lightness space to get the corresponding adjustment parameters by cooperation with the standard value of color card. Then shoot the tongue picture by digital camera, and make white equation emendation switching to the tonality, saturation, lightness space, which is then adjusted by using the above parameter and returned into the red, green and blue spaces. Finally, use gamma value to adjust the pictures of red, green and blue spaces. The gamma value of curve emendation is combined by the least double multiplication with the light value of Macbeth card standard and the average value of picture light.
Owner:TSINGHUA UNIV
Image skin color beautifying method and system under any lighting conditions
The present invention discloses an image skin color beautifying method and system under any lighting conditions. An input image is obtained by a mobile client; the brightness transition of the input image is adjusted, and a transition image is obtained; the transition image is subjected to skin color detection, and a skin color probability map is obtained; the transition image is subjected to human face detection, and a detection image is obtained; according to the skin color probability map, the highest brightness value of the skin color part in the detection image is calculated; the transition image is subjected to exposure adjustment according to the highest brightness value, and an exposure image is obtained; the exposure image is used to carry out skin color cast correction of the transition image, and a correction image is obtained; the skin color probability map is used to carry out permeability adjustment of the correction image, and a permeability image is obtained; the permeability image is subjected to saturation and contrast adjustment, and a final image is obtained; and the final image is outputted to a client. According to the method and system, the portrait skin color under various light environments can be rapidly and automatically adjusted to be natural and permeable.
Owner:CHENDU PINGUO TECH
General Hough transformation-based method for detecting position of traffic signal lamp
ActiveCN102354457APrecise positioningEasy to replaceCharacter and pattern recognitionTraffic control supervisionPattern recognitionTraffic signal
The invention belongs to the technical field of digital image processing and pattern recognition and discloses a general Hough transformation-based method for detecting the position of a traffic signal lamp, which comprises the following steps: by taking an image sequence as input, calculating image gradient information by adopting a first-order differential operator on an image by using image gradation; establishing a traffic lamp shape describing function; defining mapping from an image point to the space of an accumulator; and searching the extreme value of the space of the accumulator to acquire the coordinates of the traffic lamp to provide positional information for traffic lamp state identification. The general Hough transformation-based method for detecting the position of the traffic signal lamp can cope with the significant change of illumination, is insensitive to the influence caused by image sampling color cast and can cope with the traffic lamp with various common shapes.
Owner:FUDAN UNIV
Color constancy method in two steps under complex illumination
InactiveCN101930596AOvercoming ill-posed problemsGuaranteed brightnessImage enhancementColor imageVisual perception
The invention discloses a color constancy method in two steps under complex illumination, belonging to the technical fields of computer vision, image processing and pattern recognition. The invention provides a novel color constancy method in two steps according to principles that a human visual system has independent color passage and bright passage at early stage and visual information processing has modularity. The method comprises the following steps: firstly, utilizing pixels nearby edges to estimate color offset information of an original image, correcting color offset of a color-offset image through white balance; and secondly, according to the color relativity characteristic of three components in an RGB color space, performing same proportion enhancement on the three components of RGB of a color image through obtaining a bright gain curved surface to finally obtain a color image with unchanged color. The method of the invention solves the mal posed problems of traditional color constancy, can preferably maintain the constancy of color under color offset, low luminance and other complex illumination, can effectively improve the contrast and brightness of the image simultaneously and has good universality.
Owner:赵全友 +2
Color balance correction based on color cast attribute
InactiveUS20060222242A1Accurate balanceCharacter and pattern recognitionPictoral communicationPattern recognitionImaging processing
An image processing apparatus executes color balance correction of an image composed of multiple pixels. The image processing apparatus comprises a representative value calculation unit and a correction processor. The representative value calculation unit calculates, based on signal values of the pixels included in a skin tone area that includes pixels indicating human skin within the image, a representative value representing hue and chroma of the pixels included in the skin tone area. The correction processor executes color balance correction of the image using execution correction amount set based on normal correction amount obtained by multiplying a difference between the representative value and an ideal value designated as a value representing ideal hue and chroma of human skin by a reduction coefficient. The value of the reduction coefficient is set such that the value of the reduction coefficient can vary in response to the representative value.
Owner:138 EAST LCD ADVANCEMENTS LTD
Method for correcting multi-anaglyph color cast
InactiveCN101588439AResolve color differencesImprove stereo display effectSteroscopic systemsParallaxDisplay device
The invention relates to a method for correcting multi-anaglyph color cast, comprising the steps of firstly selecting an image with true color from a plurality of anaglyphs as a standard image, then performing color space conversion from RGB to YUV on the standard anaglyph and the color-cast anaglyphs, obtaining the true color gray values of the to-be-corrected color-cast anaglyphs in the YUV color space according to three color correction coefficients K, K and K of all pixels of the color-cast anaglyphs in the YUV color space, and finally converting the obtained true color gray values from the YUV to the RGB color space, so as to realize the correction of a plurality of color-cast anaglyphs. The invention is capable of realizing color-case correction of a plurality of anaglyphs before synthesizing a stereo image and improving the effect of a free stereo display. The method is simple and feasible.
Owner:SICHUAN UNIV
Display panel drive method and drive system and display device comprising drive system
ActiveCN108962126AHigh color accuracyPrevent color castStatic indicating devicesDisplay deviceBrightness perception
The embodiment of the invention provides a display panel drive method which is characterized in that the display panel has at least three groups of gamma curves, and the maximum grayscale of each group of gamma curves corresponds to different brightness. The drive method comprises the following steps: receiving a frame to be displayed; calling the corresponding gamma curve according to the maximumbrightness in the frame to be displayed; and generating the corresponding display information based on the corresponding gamma curve and transmitting the display information to the corresponding sub-pixels. Multiple groups of gamma curves corresponding to different brightness are included, and the corresponding gamma curve is called according to the brightness information of the frame to be displayed so that the color accuracy of the display panel is high and the situation of color cast of the display panel is prevented.
Owner:WUHAN TIANMA MICRO ELECTRONICS CO LTD
Light-guiding plate and back-light module group using same and liquid-crystal display
InactiveCN1892341AEasy to controlOptical light guidesNon-linear opticsLiquid-crystal displayLight guide
The present invention provides a light guide board and backlight module adopting said light guide board and liquid crystal display device. Light guide board includes plurality of surfaces and transparent ink lay set on at least one light passing surface. Said ink lay having colour cast particle, used for absorbing a few red light and green light for compensating colour cast caused by diffusing piece and light harvesting piece etc blooming absorbing blue light.
Owner:INNOCOM TECH SHENZHEN +1
Method and system for recognizing object colors
ActiveCN104766049AImprove accuracyAvoid the impact of subsequent color recognitionImage analysisCharacter and pattern recognitionColor recognitionObject color
The invention provides a method and system for recognizing object colors. The method comprises the steps that color cast correction is conducted on an obtained object picture; a color reorganization area is obtained according to the picture subjected to color cast correction; the colors of all pixels in the color reorganization area are recognized; the color with the most pixels in the color reorganization area is used as the object color. In this way, color cast correction is completed on the object picture, scene color information can be recovered, the influence of real color cast on subsequent color recognition is effectively avoided, and the accuracy of object color recognition is improved.
Owner:SUZHOU KEDA TECH
Method for adjusting screen brightness and chromaticity uniformity
ActiveCN102291554AIncrease brightnessImprove uniformityTelevision system detailsBrightness and chrominance signal processing circuitsColor shiftLarge screen
The invention discloses a uniformity regulating method for brightness and chrominance. Calculated brightness compensating coefficients and chrominance compensating coefficients of all pixel points are burned on an optical machine, so as to achieve the regulation of the brightness and the chrominance of the screen. When the brightness compensating coefficients are calculated, the cosine quadruplicate law causing dark side and dark corner phenomena of the screen is considered adequately, and the brightness uniformity of a single screen in a large-screen sliced wall is improved greatly. When the chrominance compensating coefficients are calculated; the regulation of the chrominance is considered from an angle what one sees is what one gets, and the color shift condition of the screen is corrected through decreasing a pixel value of a drifted color in a color-drifting area.
Owner:HUAWEI TEHCHNOLOGIES CO LTD
Photographing method and device
The invention provides a photographing method and device, and belongs to the technical field of photography. The method comprises the following steps: when a camera is started, obtaining a specified color temperature value of a current light source through a configured color temperature sensor; determining a specified reference scale corresponding to the specified color temperature value according to a pre-established mapping relation of the color temperature value and the reference scale; determining white balance matched with the specified reference scale, wherein the white balance is used for compensating the specified reference scale; and adjusting the color of a photographed object according to the white balance, and generating an image according to the adjusted color of the object. According to the photographing method provided by the invention, the color temperature sensor is configured, and the mapping relation of the color temperature value and the reference scale is pre-established, so that when the camera is started, the matched white balance can be obtained quickly, and when adjusting the color of the photographed object according to the white balance, a color cast phenomenon can be avoided, when the camera is started.
Owner:XIAOMI INC
Display method and terminal
InactiveCN106900036AExtended service lifeAvoid different degrees of agingPower managementStatic indicating devicesComputer graphics (images)Computer terminal
The invention discloses a display method and a terminal. The method comprises the steps of detecting a brightness value of each area in a current screen in a process of displaying images by an OLED (Organic Light-Emitting Diode) display screen; determining the area in which an image object position needs to be adjusted according to the brightness value of each area; and adjusting the image object position in the area according to a preset mode. According to the method and the terminal, the problems such as colour cast and image ghosts resulting from employing the OLED display screen for a long time can be effectively avoided, and the service life of the OLED display screen is prolonged.
Owner:NUBIA TECHNOLOGY CO LTD
Colour correction method for coloured light lamp
ActiveCN102196633AEnsure consistencyReduce procurement difficultyElectric light circuit arrangementIlluminanceCorrection method
The invention discloses a colour correction method for a coloured light lamp. The method comprises the following steps: (1) setting a group of UC parameter initial value at RGB (red, green and blue) ratio in a lamp controller; (2) selecting a standard sample plate lamp, and measuring the monochrome illumination RL0, GL0 and BL0 of a sample plate lamp; (3) selecting one corrected colour cast lamp, and measuring the monochrome illumination RLX, GLX and BLX of the corrected colour cast lamp; (4) calculating the colour deviation of the corrected colour cast lamp and the standard sample plate lamp; (5) selecting the colour with the minimum amplification, setting the UC parameter value of the colour to be maximum, and taking the colour illumination as the reference to calculate the UC parameters of other two colours; and (6) taking the calculated UC parameter value as a calibration value, and sending the calibration parameter to the corrected colour cast lamp to be stored by a controller SA102. The colour of the colour cast lamp is corrected to enable the colour of each batch of products to be consistent and guarantee product consistency, and purchasing difficulty is lowered.
Owner:GUANGZHOU YAJIANG PHOTOELECTRIC EQUIP CO LTD
Liquid crystal display panel and display device
InactiveCN110346987AReduced brightness changeImprove color castNon-linear opticsLiquid-crystal displayDisplay device
The invention provides a liquid crystal display panel. The liquid crystal display panel comprises an array substrate and a shading layer; pixel electrodes corresponding to at least three pixel units having different light emitting colours are arranged on the array substrate; each pixel electrode comprises a trunk part and multiple branch parts connected with the trunk part; and the shading layer is arranged corresponding to the trunk part of at least one pixel electrode. The trunk part of the pixel electrode is shaded through the shading layer; the brightness change amplitude of the pixel units at side-looking in the low gray scale is reduced; and thus, the colour cast phenomenon of the pixel units is improved.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
Method and device for improving colour cast of display visual angles and storage medium
ActiveCN109448660ASame look and feelSolve the problem of color castStatic indicating devicesVisual angleColour cast
The invention provides a method and a device for improving colour cast of display visual angles and a storage medium. The method includes the following processes: acquiring a target partition where the pixel is located, wherein the target partition is obtained by pre-dividing a display area; and performing display compensation on the pixel according to a gamma correction parameter corresponding tothe target partition. By the method and the device, the problem of colour cast of a display area from different display visual angles is solved by different display compensations of pixels at different positions, and the effect that the viewing impressions from different display visual angles are consistent is realized.
Owner:CHENGDU ZHONGDIAN PANDA DISPLAY TECH CO LTD
Method and device for adjusting image brightness
ActiveCN106412534ASolve the problem of color castTelevision system detailsBrightness and chrominance signal processing circuitsColor imageComputer science
The invention discloses a method and device for adjusting the brightness of an image. The method comprises: a black-and-white image and a color image in the same scene are obtained by using a black-and-white camera and a color camera; whether the color image is exposed excessively is determined; if not, region segmentation is carried out on the black-and-white image; the black-and-white image is processed by normalization and regions, obtained by region segmentation, of the black-and-white image are merged into a plurality of regional layers; the regional layers are divided into a bright region and a dark region; a sum of brightness differences between all regional layers in the dark region and corresponding regions in the color image is calculated to obtain a dark region brightness difference value, a sum of brightness differences between all regional layers in the bright region and corresponding regions in the color image is calculated to obtain a bright region brightness difference value; according to the dark region brightness difference value and the dark region brightness difference value, the brightness of the black-and-white image is adjusted; and the black-and-white image after brightness adjustment is fused with the color image. According to the invention, with brightness adjustment of the black-and-white image, a problem of color deviation of the fused image is solved.
Owner:CHENGDU CK TECH
Color balance correction based on color cast attribute
InactiveUS7702148B2Character and pattern recognitionPictoral communicationPattern recognitionImaging processing
An image processing apparatus executes color balance correction of an image composed of multiple pixels. The image processing apparatus comprises a representative value calculation unit and a correction processor. The representative value calculation unit calculates, based on signal values of the pixels included in a skin tone area that includes pixels indicating human skin within the image, a representative value representing hue and chroma of the pixels included in the skin tone area. The correction processor executes color balance correction of the image using execution correction amount set based on normal correction amount obtained by multiplying a difference between the representative value and an ideal value designated as a value representing ideal hue and chroma of human skin by a reduction coefficient. The value of the reduction coefficient is set such that the value of the reduction coefficient can vary in response to the representative value.
Owner:138 EAST LCD ADVANCEMENTS LTD
Compensation gray scale determination method, device and equipment
Owner:KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
Image restoration method and image processing apparatus using the same
InactiveUS20160078605A1Overcome problemsInsufficient estimationImage enhancementImage analysisPattern recognitionImaging processing
The invention discloses an image restoration method and an imager processing apparatus using the same. The method includes the following steps: receiving a haze image comprising a plurality of pixels; detecting whether a color cast phenomenon occurs on the haze image; if yes, calculating a plurality of Laplacian distribution values respectively corresponding to the color channels; determining a maximum distribution value and a minimum distribution value among the Laplacian distribution values, and generating a self-adaptive parameter by comparing the maximum distribution value and the minimum distribution value; adjusting the transmission map by the self-adaptive parameter so as to generate a adjusted transmission map; calculating a plurality of color parameters respectively corresponding to the color channels according to the Laplacian distribution values; and restoring the haze image by using the color parameters and the adjusted transmission map so as to obtain a restored image.
Owner:NAT TAIPEI UNIV OF TECH
Better picture for inexpensive cameras
ActiveUS20050036038A1Enhance the imageImage enhancementTelevision system detailsLightnessBrightness perception
A method for enhancing an image includes applying an auto-level transformation to an original image to form a first image, applying an auto-contrast transformation to the original image to form a second image, and applying an auto-brightness transformation to the original image to form a third image. The method further includes applying a color cast correction to the first, the second, and the third image to generate a first group of images, applying a gamma correction to the first plurality of images to generate a second group of images, applying a sharpening correction to the second plurality of images to generate a third group of images, and presenting the third group of images to a user to select a final result.
Owner:ARCSOFT
Method and device for background removal and synthesis of image
InactiveCN107169973ARemove real timeAvoid color castImage enhancementImage analysisComputer visionPattern recognition
The invention discloses a method and device for background removal and synthesis of an image. Image processing in the method provided by the embodiment of the invention includes the steps of adopting a stripe curtain as a background to perform image or video shooting during background removal and synthesis of an image; utilizing a digital image morphological processing method to obtain background region information; performing smoothing processing on edges of foreground and background regions; utilizing an alpha superposition coefficient to remove the background, and performing alpha superposition on a foreground image and an image to be synthesized at the same time, thereby obtaining a final composite image. The method for background removal and synthesis of the image utilizes the stripe curtain instead of a traditional monochrome (such as green and blue) curtain as a matting background, avoids the problems in the prior art that during video editing and segmentation, matting loses a specific color, a color shift of the image occurs and the offline calibration efficiency is low, real-time removal of the background can be well realized, any color can be used in the foreground, and accuracy of color detection is improved.
Owner:深圳市优微视技术有限公司
Method for deciding signal of driving organic electroluminescence module
ActiveCN1697009AImprove color castMeet the needs of commercializationElectrical apparatusStatic indicating devicesDecision methodsEngineering
A decision method of driving signal for organic electrofluorescence component ( OEC ) includes using minimum signal value of three reference signal values of red, green and blue in reference driving signal corresponded by three - element OEC as white signal value of four - element OEC; using D - value of red reference signal value ( FSV ) to white signal value ( WSV ) as red signal value ( SV ), D - value of green FSV to WSV as green SV and D - value of blue FSV to WSV as blue SV; adjusting signal value of three colours to compensate colour cast of four - element OEC in display.
Owner:AU OPTRONICS CORP
White balance method and device
ActiveCN108551576AImprove accuracyAvoid Tonal DistortionColor signal processing circuitsComputer scienceLightness
The embodiment of the invention provides a white balance method and device. The method and the device are used for solving the problem that colour cast exists in a scene of an image after white balance adjustment due to the fact that white blocks determined when the white balance adjustment is carried out are inaccurate. The method comprises the steps of adjusting a white balance weight value of each white block according to scene luminance of a to-be-adjusted image and color temperature of each white block in the to-be-adjusted image, and assuming that the adjustment degree of the white balance weight values of the white blocks within different color temperature ranges in the white blocks is different when the scene luminance of the to-be-adjusted image is greater than first preset sceneluminance, wherein the white blocks are image blocks as white balance adjustment references in the to-be-adjusted image, and the white balance weight values are used for expressing weight of color channel values of the white blocks in white balance correction value calculation; determining white balance correction values through combination of the color channel values of the white blocks and the adjusted weight balance weight values of the white blocks; and carrying out white balance adjustment on the to-be-adjusted image according to the white balance correction values.
Owner:ZHEJIANG DAHUA TECH CO LTD
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