328 results about "Colour cast" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention provides a compensation gray scale determination method, device and equipment. The method comprises the steps of obtaining a first brightness mean value of a target display area of a to-be-compensated display panel under a first gray scale value and a second brightness mean value of the to-be-compensated display panel under a second gray-scale value; according to the first brightnessmean value and the second brightness mean value, determining the target gamma value of the target display area under the target gray scale value, wherein the first gray scale value is smaller than orequal to the target gray scale value, the second gray scale value is larger than or equal to the target gray scale value, a first difference value between the first gray scale value and the target gray scale value and a second difference value between the second gray scale value and the target gray scale value are both within a preset compensation range; and determining a compensation gray scalevalue of each sub-pixel of the target display area under the target gray scale value according to the target gamma value and the target brightness value of the target display area under the target gray scale value. According to the embodiment of the invention, color cast of the display panel can be avoided.

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.

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.

A three-dimensional (3D) image display apparatus includes a display panel and a 3D image optical structure. The display panel has pixels arranged in an array and the pixels have a first region and a second region disposed adjacent to each other. The 3D image optical structure includes a plurality of first optical units disposed along a first direction. Each first optical unit has at least one first portion corresponding to the first region and at least one second portion corresponding to the second region. The first portion has a first curvature radius and a plurality of corresponding first circle centers, and the second portion has a second curvature radius and a plurality of corresponding second circle centers.; The first curvature radius is different from the second curvature radius, and the first circle centers are not overlapped with the second circle centers in the vertical projection direction. The three-dimensional (3D) image display apparatus can reduce overlapping lines of optical interference and meanwhile can avoid generation of colour cast so as to improve display effect.

The invention provides a compensation gray scale determination method, device and equipment. The method comprises the steps: dividing a display area of the display panel into a plurality of sub-display areas distributed in an array mode; selecting at least two sub-display areas from the plurality of sub-display areas to serve as reference sub-display areas, wherein the reference sub-display areasare adjacent, and one reference sub-display area comprises a target sub-pixel to be compensated; determining a weight coefficient of each reference sub-display area according to the distance between the central point of the target sub-pixel and the central point of each reference sub-display area and the distance between the central points of the adjacent reference sub-display areas; performing weighted summation on the weight coefficient of each reference sub-display area and the brightness mean value of each reference sub-display area under the target gray scale value to obtain a target brightness value of the target sub-pixel under the target gray scale value; and determining a compensation gray scale value of the target sub-pixel under the target gray scale value according to the target brightness value. According to the embodiment of the invention, the color cast problem of the display panel can be improved.

The invention provides a novel method for detecting image color cast by a color saturation detecting technology. Based on a color cast detecting algorithms of color saturation detection and application thereof in intelligent security, the method can effectively judge whether color cast is generated, thereby realizing intelligent video monitoring and intelligent judgment.

The present disclosure relates to signal processing such as digital watermarking and other encoded signals. One claim recites a method of offsetting color casting for a printed object associated with a retail product. The method includes: providing a first additive that absorbs light energy at or around a center wavelength of an illumination source; providing a second additive that absorbs in the ultra-violet spectrum, yet fluoresces at or around the center wavelength of the illumination source, wherein a combination of spectral responses of the first additive and the second additive offset color casting; printing the first additive, second additive and a color on the printed object, wherein the printing conveys an encoded plural bit signal. Of course, other claims and combinations are provided in the specification with reference to specific implementations and related examples.