Abstract: The control unit provided in the image processing apparatus determines, based on the measurement result obtained by the time measurement unit, whether or not a change timing of external light detected and determined by the external light detection unit and the external light change determination unit is before a predetermined time has elapsed since the input switching detection unit detected the switching process. When the change timing of external light is before a predetermined time threshold value Th1 has elapsed as a result of the determination, the control unit provides instructions to the image processing unit about executing image quality adjustment processing while increasing the adjustment amount per unit time.

Abstract: A method for correcting the white balance of a display by: setting a target color coordinates of a target white point of a target white point plane at a predetermined color temperature and a group of gray levels as the input gray levels in response to a user input command; constructing a white color image according to the group of the gray levels; measuring luminance and color coordinates of a measured white point of the white color image; estimating luminance of the R, G, B based on the standard color coordinates defined in a standard color space, the measured luminance and color coordinates of the measured white point; estimating gray levels of the R, G, B based on the estimated luminance of the R, G, B; and reconstructing the Gamma table based on the estimated adjusted gray levels of the two adjustable colors.

Abstract: Device and method for color adjustment for adjusting white color of an image including a weight generating unit, a color shift value generating unit, and an adjustment unit. The weight generating unit receives a first color value of the image and generates a weight according to the first color value. The color shift value generating unit receives the first color value and the weight and generates a color shift value according to the first color value and the weight. The adjustment unit receives the first color value and the color shift value and generates a second color value according to the first color value and the color shift value.

Abstract: Some embodiments provide a program that performs a color balance operation. The program identifies an image that includes several pixels. Each pixel includes a luma component value and chroma component values. The program analyzes the luma component values of the pixels in the image to identify several luma ranges. The program determines, for each luma range in the several luma ranges, a set of transforms for modifying chroma component values of pixels in the image in order to remove a color cast from the image. The program applies the sets of transforms to the image to remove the color casts from the image.

Abstract: A display apparatus, which displays a color image by controlling the number of emissions or the intensity thereof in accordance with primary color video signals input thereto, has a detection portion and a white balance correction portion. The detection portion is used to detect the number of emissions or the intensity, and the white balance correction portion is used to correct white balance by adjusting the amplitudes of the primary color video signals in accordance with the detected number of emissions or the detected intensity. Therefore, correct white balance can be maintained regardless of the number of emissions or the intensity of emission.

Abstract: 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.

Abstract: For computing a plurality of white balance gains with regard to a single image data item, a target image is first divided into a plurality of blocks. Then, a representative value of each block is computed, and a value representing the relative contribution of each light source type to a whole image is calculated based on the representative value which is obtained. Once the representative value of each block and the contribution level of each type of light source are obtained, a MWB gain and an AWB gain are computed using these results. Because the computation of the representative value of each block, which is a calculation operation performed for each pixel, is performed only once, the computation time can be greatly reduced.

Abstract: According to one embodiment, an auto white balance adjustment system includes a first color judgment gate generation unit and a second color judgment gate generation unit. The second color judgment gate generation unit defines a color-temperature range subject to a white balance adjustment for each light source. The color judgment gate switch unit switches between the first color judgment gate and the second color judgment gate, as a reference for selecting pixel data used for calculating the white balance gain.

Abstract: A method and apparatus whereby a two-dimensional touchpad control for selecting color is implemented via a touch sensitive surface with a graphical attachment on its surface to select both an intensity and a color. The graphical attachment having two regions, one region being a rectangular shape to select the intensity via a Y-axis and the other being a two dimensional X/Y-axis control surface with color Hue on one axis and color Saturation on the other axis. Software running in a control device monitors touchpad regions for user inputs and converts the raw selected parameters on the touchpad into the Hue, Saturation and Intensity information, used in the preferred embodiment to control light fixture color and intensity.

Abstract: A light output control device for laser light sources for respective RGB colors includes, for each of RGB, three sets, each including: a semiconductor laser for one of the colors; light output detection unit for detecting a light output from the semiconductor laser; light output adjustment unit for updating a light output target value; light output control unit for controlling the semiconductor laser based on the updated light output target value; and division unit for dividing the light output by an output from the light output adjustment unit to obtain a ratio of the rising of the light output, and includes rising determination unit for determining, based on results obtained by the respective division unit, a semiconductor laser with a slowest rising and outputs light output adjustment values for the respective colors. The light output adjustment unit update their respective light output target values based on the light output adjustment values.

Abstract: A white point of a shooting condition corresponding to image data is acquired, and information of a local white point corresponding to a pixel of interest of the image data is calculated using surrounding pixels of the pixel of interest. An adapting white point corresponding to the pixel of interest is calculated based on the white point of the shooting condition and the information of the local white point. Image data of the pixel of interest is corrected using the adapting white point.

Abstract: An apparatus includes an evaluation acquisition unit, a chromaticity value calculation unit, a weight coefficient calculation unit, a histogram analysis unit, an appearance at a light source calculation unit, a white balance coefficient calculation unit, and a white balance operating unit. the evaluation acquisition unit acquires color signal values from image data. The chromaticity value calculation unit calculates chromaticity values from the color signal values. The weight coefficient calculation unit extracts a signal value as a lightness value, and calculates a weight coefficient determined by the lightness value. The histogram analysis unit calculates the center position of a histogram, a histogram multiplication value and a histogram dispersion value. The appearance at a light source calculation unit calculates an appearance at a light source for each color temperature. The white balance operating unit executes a white balance operation with respect to the image data using a white balance coefficient.

Abstract: Methods and apparatus, including computer program products, for performing color correction. One product can receive a digital image that includes a region depicting human skin; obtain a skin color value based on a sample; receive a skin parameter value that is a tan or a blush value; use the skin color value and the skin parameter value to determine an estimated ambient lighting condition of the image; and determine a color correction based on the estimated lighting condition and a target lighting condition. Another product can use the skin color value to determine an estimated color temperature of the image and an estimated tint shift of the image, and can determine a color correction based on the estimated lighting condition and a target lighting condition and the estimated tint shift. Another product can use the skin color value and the skin parameter value to determine an estimated camera color setting.

Abstract: A processor, such as a TV processor, determines which one of at least two audio-video components is sending signals to a TV for display. Based on the determining act, the processor establishes a color of a bezel of the TV.

Abstract: A normal AWB (auto white balance) correction value is calculated based on inputted image data. Further, a face area is identified from the inputted image data and a face AWB correction value is calculated based on image data in the face area. Then, first feature data and second feature data are extracted from the inputted image data and image data in the face area, respectively. A total AWB correction value is calculated in accordance with at least one of the face AWB correction value and the normal AWB correction value based on a comparison result of the first feature data and the second feature data. Thus, an erroneous correction can be prevented in an AWB correction using a face detection function.

Abstract: In order to obtain an excellent color processing result by calculating an optimal white point in partial adaptation, first white point data which indicates white of a device is input, the first white point data is projected onto a predetermined curve, and white point data in the partial adaptation located on the predetermined curve is calculated using the projected first white point data and the second white point data located on the predetermined curve. Color processing of input color data is performed using the white point data in the partial adaptation, which is corrected in accordance with the positional relationship between the first white point data and projected first white point data, and the color reproduction characteristics of the device.

Abstract: White balancing is performed using a mapping that maps the visible gamut's boundary into itself. A predefined color Win is mapped into a color Wout which is a white color or a color perceived as white under some viewing conditions. If Sin is some other color, a corresponding color Pin is determined on the visible gamut's boundary. Pin can be on the intersection of the visible gamut's boundary with a plane containing Sin and Win in a linear color coordinate system. Sin is mapped into a color Sout obtained from Wout and a value of the mapping on Pin.

Abstract: A white balance correction apparatus may include a dividing unit, a white evaluation unit, a white balance correction unit, and a camera orientation discrimination unit. The dividing unit divides an image into a plurality of divided areas. The white evaluation unit determines whether image data within every divided area is indicative of a color white according to white detection regions in a color temperature range defined based on a position of each divided area in the image. The white balance correction unit performs a white balance correction based upon image data determined to be indicative of the color white. The camera orientation discrimination unit discriminates orientation of a camera. In accordance with the discriminated orientation, the white evaluation unit changes a combination of position of each divided area and condition used.

Abstract: Various techniques for implementing aspects of color control in display devices are disclosed. One exemplary technique includes measuring an input/output profile of a display, then applying a mathematical model to the display's measured profile to generate color control tables. One exemplary technique may include tracking a first color temperature below a high-luminosity transition point and gradually transitioning to tracking a second color temperature above the high-luminosity transition point. One exemplary technique may also include gradually transitioning from tracking a darklight color temperature below a low-luminosity transition point to tracking the first color temperature above the low-luminosity transition point. Another exemplary technique may include tracking a response curve for a specified chromaticity above a low-luminosity transition point.

Abstract: A color control algorithm compensates variations in the display system so as to maintain color consistency in the projected images on the screen by constructing a color mapping table of the display system to include effects due to the variations and during image display applications, generating inputs of the color mapping table to include the effects due to the variations in the display system.

Abstract: Generation of an Interim Connection Space (ICS) of a full spectral space is provided. A space of illuminants is accessed, and the full spectral space is decomposed into a first subspace that is an orthogonal complement of a metameric black subspace for the space of illuminants. The Interim Connection Space is generated based on the first subspace. The generated ICS can be used, for example, for rendering an image on an additive color destination device. One image rendering workflow includes accessing color data of the image in an ICS, transforming the color data from the ICS into a device dependent color space of an additive color destination device, and rendering the transformed color data on the destination device.

Abstract: Disclosed are a display apparatus and a video processing method of the display apparatus, the display apparatus including a user interface (UI) generator which generates and outputs UI information to a display unit; a user selection unit which allows a user to select a view zone; a signal processor which processes a received video signal displayable through the display unit; and a controller which controls the UI generator to display a selection menu including at least one view zone item on the display unit if a control signal for adjusting the view zone is selected from the user selection unit, and controls the signal processor to change at least one of an image quality adjusting value and a grayscale value of the received video signal if the view zone item is selected through the selection menu.

Abstract: Shown is a diagram showing input-output characteristics for color adjustment. The horizontal axis represents an input, and the vertical axis represents an output. In this color adjustment technique, first, so as to prevent degradation the luminance of white after white correction, correction coefficients are determined so that the smallest value thereof may be 1. Note that “1” here is not a strict value. To be more specific, in contrast to the conventional technique in which correction is performed with the largest value being made equal to about “1,” the present embodiments sets the smallest value at about “1.” This idea itself is a first point which makes the embodiments different from the conventional technique. When doing so, all the correction coefficients are “1” or larger. In the case where a correction coefficient is “1” or larger, when the input is large, the output is saturated.

Abstract: A liquid crystal display device includes a four-color conversion circuit with no chromatic changes in which the chromaticity and luminance of input image data are maintained, a four-color conversion circuit with chromatic changes in which the chromaticity and luminance of input image data are not necessarily maintained, and a selector for switching between the outputs from the two conversion circuits according to a level detection signal from a level detection circuit that detects whether the level of input image data is equal to 100% white level or higher. Display data from the selector is supplied to a liquid crystal section that displays an image by four-color pixels of red, green, blue, and white. The image data conversion circuit controls the light emission quantity of a backlight (BL) as white color, and converts input image data so that the level of data displayed on the liquid crystal section becomes uniform.

Abstract: A color temperature calibration method for calibrating the color temperature of a display device according to a set of target chromaticity coordinate values, includes: measuring colors displayed by a plurality of display cells of the display device to generate at least a set of measurement chromaticity coordinate values; and adjusting at least a first gain value of the display device according to the set of target chromaticity coordinate values and the set of measurement chromaticity coordinate values; where the first gain value corresponds to the color of a first color channel of the display device; and the first color channel is one of the red color channel, green color channel and blue color channel.

Abstract: A PC 40 outputs a picture signal for a white color to a TV 100, and generates chromaticity information by measuring luminance values of respective RGB color components from a picture displayed on the TV 100, thereby determining whether the chromaticity information undergoes a change by varying an output of any of the RGB color components by a predetermined amount. Subsequently, when the chromaticity information has not undergone a change, the contrast of the TV 100 is lowered by a predetermined amount, and re-acquisition re-determination of chromaticity information is executed. On the other hand, when the chromaticity information has undergone a change, determination is made on whether the chromaticity information substantially matches chromaticity information representing white, and in the affirmative case, a white balance adjustment value is stored in an EEPROM 112 while in the negative case, the re-acquisition/re-determination of chromaticity information is repeated.

Abstract: A method and display device for correcting spatial non-uniformity in a display device are provided. The method includes receiving color signals of a pixel to receive the pixel, extracting correction data for correcting adjacent representative color signals which represent areas adjacent to the received pixel, and correcting the adjacent representative color signals using correction data and correcting the color signals of the pixel using the corrected adjacent representative color signals.

Abstract: In an image sensing apparatus, the color value of a conversion destination is acquired from a code image included in the image data captured by an image sensing unit. A frame is displayed on an electronic viewfinder screen, which is displayed based on the image data output from an image processing unit in the image sensing apparatus. The color value of a conversion target is determined based on color information included in the frame of an image displayed on the electronic viewfinder screen in response to a predetermined operation input. Color conversion parameters of the image processing unit are determined so as to convert colors within a predetermined range including the color value of the conversion target into colors within a predetermined range including the color value of the conversion destination on a color space.

Abstract: An automatic white balance (AWB) system including a luminaire, a light sensing unit, an analog-to-digital converter, a control unit and a driving circuit is provided. In the AWB system of a projection apparatus, the suitable AWB method is applied. The light sensing unit includes a light sensor and a light sensing circuit. The light sensor is coupled to the light sensing circuit for sensing intensity of the color lights emitted from the luminaire, no matter what colors the color lights emitted from the luminaire are. The white balance of the color lights in the AWB system of the projection apparatus is automatically achieved with the light sensor instead of the color sensors. Therefore, the cost of the projection apparatus with the AWB system is reduced.

Abstract: System and method for increasing the blue component of white and near white pixels while avoiding hard transitions and without affecting flesh-tone colors. Pixels that are bright enough and fall within a detection area in the UV-plane have their blue components increased and their red components decreased. The detection area is limited to avoid application of blue stretch to flesh-tone colors. A transition boundary is provided around the detection area for gradually decreasing the amount of blue stretch as pixels move away from the boundary of the detection area, thereby avoiding hard transitions between areas that are blue stretched and areas that are not blue stretched.

Abstract: Described herein are power conservation techniques that reduce power consumption for an electronics device including a display. The techniques divide video information for display into white and non-white video information. The white video information is altered such that the alteration decreases the amount of power required to display the white video information. The altered white video information and non-white video information are then visually output together. White-based power conservation as described herein may be performed while a person uses the electronics device, which reduces power consumption continually during usage.

Abstract: An auto white controlling method and apparatus are provided. The method includes providing a plurality of feature points having color features of an image if the image includes an object having dominant chroma; detecting a first illuminant according to the feature points; calculating a mean chroma of data showing a chroma difference within a threshold value with a chroma of the first illuminant among data constituting the image; and providing a second illuminant by mapping the mean chroma to an illuminant locus. The apparatus includes a feature-analyzing module that provides a plurality of feature points having color features of an image; and an illuminant-detecting module that detects a first illuminant by using the feature points, calculates a mean chroma of data showing the color difference within a threshold value with the chroma of the first illuminant, and provides a second illuminant by mapping the mean chroma to an illuminant locus.

Abstract: Automatic weight adjustment (AWA) to derive an optimal color correction matrix may address unbalanced color reproduction performance among different illuminations and/or unbalanced color reproduction performance for specific memory colors. AWA may emphasize particular colors and equalize color performance. AWA may be implemented in an automatic process with optional manual operation.

Abstract: An amplifier gain setting section estimates a light source parameter which relies upon a spectral distribution of an image pickup light source based on an image signal. Then, a first adjustment control value for each color signal when adjustment is to be performed so as to establish a white balance based on the estimated parameter is modulated by an amount corresponding to a follow-up sensitivity toward a second adjustment control value when adjustment is to be performed so that an achromatic subject under a particular reference light source is reproduced as an achromatic subject. The modulated adjustment control value is set to a white balance amplifier. The follow-up sensitivity is set to the amplifier gain setting section in response to an illuminance level estimated from a detection value of the brightness.

Abstract: A method and an apparatus are provided for adjusting white balance of a digital image. An input image is converted into a YCbCr color space. White pixels of the converted input image are detected by determining whether each pixel of the converted input image is included in a preset region of the YCbCr color space. A gain of each channel is calculated from averages of R, G and B values of the detected white pixels. White balance adjustment is performed by applying the calculated gain of each channel to each pixel of the input image.

Abstract: An apparatus for auto white balance includes a histogram generation unit writing respective histograms of Cb values and Cr values with regard to pixels included in an input image frame, a single-tone determination unit comparing respective maximum values of the histograms of Cb values and Cr values with a first threshold value, and determining the input image frame as a single-tone image if at least one of the maximum values is higher than the first threshold value, and an auto white balance gain computation unit computing and an auto white balance gain by using color information of an input image frame and outputting the computed auto white balance gain, wherein if the input image frame is determined to be a single-tone image, the auto white balance gain computation unit outputs an auto white balance gain computed with respect to a previous input image frame.

Abstract: Disclosed is a method for setting the white balance of a video frame. The frame is first divided into sub-regions. Those sub-regions determined to be possibly dominantly monochromatic are eliminated from consideration, and the white balance is set by adjusting the color gain of the frame, the adjusting based on the other sub-regions in the frame. A sub-region is determined to be possibly dominantly monochromatic if the difference between its averaged color and each of a set of neutral reference colors is greater than a threshold. If the difference between the averaged color and at least one of the neutral reference colors is less than or equal to the threshold, then the sub-region is still determined to be possibly dominantly monochromatic if that neutral reference color, along with an illuminant type of a previous frame in the video, match closely enough to an element in an ambiguous reference color list.

Abstract: A method of obtaining a new color temperature point as applied in a color display device. The color display device has a brightest temperature point when its red, green, and blue components are all in their brightest states. The method of obtaining a new color temperature point uses a mathematical method to find the new point which substantially satisfies the specific color temperature and also causes a minimum loss in brightness.

Abstract: A method and apparatus for automatic white balancing of an image. The method includes retrieving scene analysis of the image, determining at least one of the type of the scene and a scene content map utilizing the scene analysis of the image, performing scene adaptive white balance, if overall scene category type is used, perform white balance by applying global R, G, B gains optimized for the global scene type, and if scene segmentation map is used, perform locally adaptive white balance by applying an R, G, B gain map optimized for each scene content.

Abstract: An imaging device according to the present invention includes a registration unit, an imaging unit, a searching unit, and a color adjustment unit. The registration unit registers a reference subject. The imaging unit shoots a subject and outputs image data. The searching unit searches a specific area matching with the reference subject from an image area of the image data. The color adjustment unit performs color adjustment such that color information of the specific area approximates to the color information of the registered reference subject.

Abstract: In the video processing device, a correction amount update determining unit determines whether to update a correction amount based on an input image obtained from an image input unit and when a cut point is detected or when the number of frames in a number of frames storing unit exceeds a fixed value, determines that update is required, and at this time, a correction amount obtaining unit obtains a new correction amount based on the input image. Then, if no cut point is detected, an amount of change of a correction amount in time is limited and the obtained result is recorded in a correction amount storing unit, and an image correcting unit conducts quality improving correction processing with respect to the input image based on a correction amount recorded in the correction amount storing unit and the image corrected is sent to an image output unit.

Abstract: A method and apparatus for auto white balance in a portable terminal is provided. The method includes analyzing a captured image with histograms of red, green, and blue channels and a histogram of a gray channel; determining whether the histogram of the RGB channels and the histogram of the gray channel overlap over a predetermined percentage; measuring each color distribution average value of the RGB channels when the histogram of the RGB channels and the histogram of the gray channel overlap over a predetermined percentage; and performing color temperature correction using the color distribution average value measured in each of the RGB channels.

Abstract: Various embodiments for adaptive screen color calibration are presented. An embodiment of a method includes activating a calibration feature on a device, obtaining color data by scanning a pre-set color pattern displayed on a screen via a RGBW color sensor in the device, obtaining a current ambient light condition via an ambient light sensor in the device, obtaining a current temperature condition via a temperature sensor and measuring the color data with the current ambient light condition and current temperature condition, where the measured color data is used to automatically adjust one or more color settings of the screen to match a pre-set color standard. Other embodiments are described and claimed.

Abstract: During adjustment of a white balance, images having different white balances are displayed respectively on a plurality of regions on the screen 201 of the display 200, based on the red video signal Rout, the green video signal Gout and the blue video signal Bout output from the gamma correction device 30. After that, an user selects any of the plurality of regions by comparing the plurality of images having the different white balances displayed on the regions A to I on the screen 201 of the display 200 and pressing a touch panel on the screen 201. The image on the selected region is displayed on the entire screen 201 of the display 200, based on the red video signal Rout, the green video signal Gout and the blue video signal Bout output from the gamma correction device 30.

Abstract: A television set carries out communications with a remote control. When the television set displays a picture based on a picture signal subjected to quality adjustment, a signal level of a quality adjustment parameter is obtained, and the data indicating the obtained signal level is transmitted to the remote control. The remote control displays the received data. The user checks the displayed data, and enters data for changing the signal level so that the remote control transmits the entered data to the television set. The television set receives the changed level data, and adjusts the quality relating to the picture signal based on the received level data. The television set displays the picture of the quality adjusted according to the signal level changed by the user.

Abstract: An image processing device of an example of the invention comprises a section which acquires a gain value obtained by an automatic white balance process executed on image data to be processed, a section which, based on the gain value, determines a correction color matrix coefficient having a property of correcting a change in an appearance caused by a color temperature corresponding to the gain value, and a section which, based on the correction color matrix coefficient, performs a color adjustment on the image data obtained by the automatic white balance process.

Abstract: A pixel compositor device for routing an incoming stream of pixel data having been rendered elsewhere and bound for being projected. The device includes a plurality of digital signal inputs each adapted for receiving a plurality of pixel information from the incoming stream of pixel data. The digital signal inputs are in communication with at least one buffer for the pixel information once received by the device. A processing unit is included for image warping the pixel information by performing, on each of a respective of the pixel information: (i) a mapping relating to location of the respective pixel information, and (ii) a scaling function. The geometric mapping can be performed by applying an interpolation technique; and the scaling function can be any of a number of photometric correction functions (alpha-blending, color uniformity correction, image brightness or contrast adjustment, etc.).

Abstract: A color image processing apparatus performs color image display using a red display, green display, blue display and white display. The apparatus includes a white signal generation circuit generating a white signal W based on an input red signal Rin for the red display, an input green signal Gin for the green display, and an input blue signal Bin for the blue display, a yellow signal generation circuit generating a yellow signal Ye, based on the input red signal Rin, the input green signal Gin, and the generated white signal W, and a first output white signal generation circuit generating a first output white signal Wout(1) for the white display, based on the generated white signal W and the generated yellow signal Ye.

Abstract: An image sensing apparatus which uses image sensors with different spectral sensitivities depending on driving modes executes still image sensing in accordance with a predetermined operation instruction from a user, during a predetermined operation of driving the image sensor in the driving mode different from still image sensing. In such still image sensing, a still image sensing white balance control value is obtained based on an image signal obtained by driving the image sensor in the driving mode for still image sensing, and a white balance is controlled in still image sensing. When returning to the predetermined operation state from still image sensing, the white balance control value obtained in still image sensing is converted to the white balance control value corresponding to the driving mode of the image sensor in the predetermined operation state to apply the obtained white balance control value.

Abstract: First white balance correction coefficients computed based on a detected face region, and second white balance correction coefficients for correcting, to a skin color, chromaticity obtained after applying the first white balance correction coefficients to the face region are obtained. The degree of detection reliability of the face region is determined based on the parameter values obtained from the pixels of the face region and predetermined conditions. Resultant white balance correction coefficients are computed from the first white balance correction coefficients and the second white balance correction coefficients to which a smaller weight is applied as the degree of detection reliability is lower. Even when a face region is erroneously detected, high-precision white balance correction coefficients can be obtained.