Abstract: A method of providing one or more aspects of an ambient environment comprises receiving a video signal, processing the video signal and controlling ambient light accordingly. A corresponding device and system of devices are described.

Abstract: With the aim of offering a video display technique by which stable and high contrast video images are reproduced, contrast adjusting circuitry is constructed. The contrast adjusting circuitry detects a maximum picture level (MPL) and an average picture level (APL) of analog-to-digital converted luminance signals for a predetermined period, determines one of the predefined luminance regions within which the MPL falls and one of the predefined luminance regions within which the APL falls, and, based on the thus determined luminance regions of both MPL and APL, carries out a contrast adjustment of video images by changing the gain of luminance signals and color depth correction by changing the gain of color signals.

Abstract: Disclosed is a method for generating transfer curves for adaptive contrast enhancement. Transfer curves are generated so as to enhance the bright pixels in mostly dark images and the dark pixels in mostly bright images. For a dark image, a transfer curve is generated which increases luminance in high-luminance regions of the image without substantially changing the luminance in the mid- and low-luminance regions of the image. For a bright image, a transfer curve is generated which decreases the luminance in the dark areas of the image without substantially changing the luminance in the mid- and high-luminance regions of the image. For a medium-bright image, a transfer curve is generated with increases the luminance in the high-luminance range and decreases the luminance in the low-luminance range of the histogram without substantially changing the luminance in the medium-luminance range of the image.

Abstract: The present invention relates to a method for simulating the scenes of image signals, which comparing different image signals in alternation time to decide the emitting type and the emitting conversion of a light-emitting device so as to accomplish simulating the scenes of the image signals.

Abstract: Disclosed is a circuit for driving a self light-emitting display device which itself emits light when an electric or other energy is inputted thereto and a method thereof. According to the circuit and method, the self light-emitting display device can be driven more stably and with a higher efficiency by adjusting the number of used bits and luminance of respective color components in accordance with a luminance change of an external light and keeping a constant contrast ratio irrespective of the adjustment of the bit numbers.

Abstract: A display system may include an identifier configured to identify an image display condition associated with the display of an image produced by the display system, an apparatus configured to produce a plurality of differently colored images, and a display device. The images have color characteristics based on image information and the identified display condition. Differently colored images may be directed along associated portions of an optical path. The display device may be coupled to the apparatus and may be configured to display a color image formed of the differently colored images.

Abstract: A display system includes a display device and a data processing module. The display device is configured to display an image and has a processing profile associated therewith. The data processing module is remote from and operatively coupled to the display device and is configured to receive input image data for the image to be displayed and generate processed image data from the input image data based on the processing profile of the display device.

Abstract: A method for contrast enhancement of a video signal comprises receiving a video signal frame, gathering statistics about the video signal frame, calculating the effective input dynamic range of the video signal frame, calculating the effective output dynamic range of the video signal frame, and constructing a transform to enhance the picture in the video signal frame by mapping the effective input dynamic range to the effective output dynamic range via the transform.

Abstract: Disclosed are a method of compensating colors in an image display device for users with color vision deficiency and a device of the same, enabling the users with color vision deficiency to view display images as vividly and naturally as normal users. The method for compensating colors in an image display device includes a step of determining whether a user is partially color blind or normal, and a step of controlling gain values of a plurality of color signals depending upon the user's color perceptivity so as to compensate colors displayed on a screen, if the user is determined to be partially color blind.

Abstract: Provided herein are teachings directed to calibrating an output device such as a color display, using a visual method of determining the gamma for the blue primary that is easier to perform and more consistent than methodologies employing a luminance-matching task. The methodology is based on the insight that accurate gamma estimation for blue is important not for luminance reproduction, but for proper color-balance, and most importantly grey-balance. Thus, it follows to use grey-balancing, rather than luminance-matching, as the criterion for selecting the blue gamma value. One variant as taught herein is to provide a user visual task to find a patch best representing neutral, given previously determined calibrated digital values for the red and green primaries that produce 50% fractional luminance. A large patch is displayed within a larger surround containing both a white border and either a checkerboard or a line pattern, so as to establish a reference for the neutral axis.

Abstract: Video signals that are reproduced or processed are outputted to a first video image display device. An illuminance detection section detects the ambient illuminance during the output of the video signals. In the case that the detected illuminance is equal to or greater than a predetermined threshold, the reproduced or processed video signals are outputted to a second video image display device which provides a display with lower brightness than that for a display provided by the first video image display device.

Abstract: A circuit for detecting light is disclosed comprising: a) a light-integrating photo-sensor circuit having one or more thin-film photosensors and being responsive to a variable integration period signal and to ambient light for producing a photo signal representing the intensity of the ambient light, wherein the photo signal may be in one of at least three states including a no-signal state, an in-range state, and a saturated state; and b) a control circuit for receiving the photo signal and automatically increasing the period of the integration period signal when the photo signal is in the no-signal state and decreasing the period of the integration period signal when the photo signal is in the saturated state so as to result in the photo signal being in the in-range state and producing a corresponding ambient light signal.

Abstract: A system and method for adjusting the color of an application user interface (UI). A UI allows a user to define hue and saturation values used to adjust first RGB values of pixels determining the color of the UI. A media player application (MPA) calculates second RGB values as a function of the first RGB values and the defined hue and saturation values. The MPA compares the defined saturation value to a threshold saturation value. If the defined saturation value is less than the threshold saturation value, the MPA calculates third RGB values as a function of the second RGB values, and assigns the third RGB values to the pixels determining the color of the UI. If the defined saturation value is equal to or greater than the threshold saturation value, the MPA assigns the second RGB values to the pixels determining the color of the UI.

Abstract: A system provides an image displaying technique that provides stable high contrast even in an area having high brightness. Based on information about an average brightness level of a digital luminance signal, black-correction processing which decreases a brightness level by offsetting the brightness level to the minus side, and increase processing which increases a contrast gain within a dynamic range, are performed for an analog luminance signal or a digital luminance signal, enabling improvement in contrast even where brightness is intense.

Abstract: A method of adjusting the N components of an N component color signal (such as the 3 components of an RGB color signal) with respect to color temperature of illuminating light when imaging a colored subject, comprising the step of computing the difference between each of the components of the color signal for different temperatures of illuminating light, using an algorithm based on the spectral sensitivity of the imaging means and Planck's equation defining black body illumination to obtain N components whose values are independent of the color temperature of the illuminating light. Normalisation of the adjusted values renders the values independent of intensity of illumination and can also reduce the processing time for further processing of the signals. A technique for compensating for gamma correction which is commonly built in cameras, is disclosed.

Abstract: Aspects of the invention provide a projector capable of comparatively easily achieving a contrast ratio higher than the original contrast ratio of the liquid-crystal light valve by a simple mechanism. The illumination light modulated by liquid-crystal light valves, i.e., image light, can be combined together in a cross dichroic prism, and then light intensity of suitable pixels is reduced by a proper amount by a liquid-crystal light valve, and then sent to a projection lens. The image light entering the projection lens can be projected to a projection surface. Because the light intensity of the image light formed by the liquid-crystal light valves is appropriately attenuated at suitable pixel areas by the liquid-crystal light valve, image light projection with a contrast ratio exceeding by far the contrast ratio achievable by the liquid-crystal light valves alone is possible due to cumulative light-intensity adjustment.

Abstract: A method is disclosed for determining an adjustment amount to be made to an input chroma, Cin, to squeeze the input chroma toward a region of preferred chroma, Cpref. This method involving first defining a change in chroma as: ?C=Cin?Cpref and defining a chroma weight as: Cweight=Gaussian(Cpref,Csigma); defining a luminance weight as: Lweight=Gaussian(Lpref,Lsigma); defining a hue weight as: Hweight=Gaussian(Hpref,Hsigma);. Then, an amount of chroma adjustment is: CAdjust=?C*(Hweight*Cweight*Lweight). An output chroma is generated by applying chroma adjustment to chroma input: Cout=Cin?CAdjust.

Abstract: An environment-compliant image display system, image processing method and information storage medium which can reproduce the same colors at different locations by absorbing any difference in the visual environment. In an individual environment, an image data is generated by absorbing any difference between a reference environment and the individual visual environment by a colored light information processing section 140, based on X, Y and Z values of an image in an image display area measured by a colored light sensor 60 as well as X, Y and Z values measured in the reference environment. A profile for projector input/output is corrected by a profile managing section 130 and then an image is projected by using an L/V drive section 190.

Abstract: The present invention relates to controlling contrast in at least part of a picture. The contrast control is performed by reducing the saturation (2–4) of the picture during contrast increase (1).

Abstract: Device and method for compensating a picture quality of a projection type display, the device including a screen for displaying a picture projected from outside of the screen, a video processing part for receiving, and converting an analog video signal into a digital video signal, and adjusting an offset and a gain thereof, for making the video signal displayable on the screen, a sensing part for sensing the video signal from the video processing part and projected to a region of the screen, a memory part for storing reference video information, and a microcomputer for projecting the reference video information stored at the memory part onto the screen through the video processing part according to a user's picture quality compensation command, or a preset algorithm, and controlling the video processing part so that a luminance and chromaticity of the picture are calculated according to an output of the sensing part, the luminance and the chromaticity of picture are compared to preset values, and a compensati

Abstract: Disclosed is a circuit for driving a self light-emitting display device which itself emits light when an electric or other energy is inputted thereto and a method thereof. According to the circuit and method, the self light-emitting display device can be driven more stably and with a higher efficiency by adjusting the number of used bits and luminance of respective color components in accordance with a luminance change of an external light and keeping a constant contrast ratio irrespective of the adjustment of the bit numbers.

Abstract: A video signal enhancement unit (100) and an image display apparatus containing the unit have a processing unit (102) for contrast modification of the video signal. The processing unit (102) receives input data from a contrast counter (112), designed to store a contrast count. The contrast count is decreased by a pixel counter (104) each time the total number of pixels which have video signal levels that are higher than a predetermined video level, exceeds a predefined threshold. The contrast count is increased each time a trigger means (114) generates a pulse. A contrast comparator (116) can be coupled to the contrast counter (112) to limit the contrast count to a maximum contrast value.

Abstract: To provide an environment-compliant image display system, image processing method, and information storage medium that enable correction of images within a shorter time, a Y value of color signals (Y3, x3, y3) measured by a color light sensor 60 and converted by an Y3x3y3 conversion section 143 is substituted into Y1, which is a Y value of an ideal environment, by a Y substitution section 142; color difference between the substituted color signals (Y1, x3, y3) and ideal color signals (Y1, x1, y1) is obtained by a color difference calculation section 145; and an environment subjective coefficient correction section 148 corrects the color difference when the color difference does not lie within a permissible correction range, and use the corrected color difference (?x?, ?y?) to correct the image display information.

Abstract: A surrounding light judging method and a video compensation control apparatus which are capable of securing an optimum quality of picture by detecting a color signal near a video displaying instrument, judging a lighting environment from the detected color signal, and automatically correcting a video data in accordance with the judged lighting environment and a variation in the lighting environment.

Abstract: A high definition display unit which demodulates, decodes, and processes in relation to chroma and displays a television signal in which a PI (picture) signal and an SI (service information) signal are mixed. A changeover switch 13 connected to an image quality adjusting circuit in a video chroma processing circuit 7 is opened or closed according to an on-off signal S1 showing the superposed period of both signals detected by a decoder 4. If the above on-off signal S1 is on, the changeover switch 13 is opened and the adjustment of image quality is disabled. Therefore, SI display never disappears due to the adjustment of image quality, and the quality of an image can be also adjusted according to an ambient status. Other approaches are also disclosed from preventing image quality adjustment of at least portions of a displayed image containing an information image.

Abstract: A method and a device by which original digital signals are analysis-filtered, where the original digital signals include original samples representing physical quantities, and where the original samples are transformed by successive calculation steps into high and low frequency output samples. Any sample calculated at a given step is calculated by a predetermined function of the original samples and/or previously calculated samples, where the samples are ordered by increasing rank. The signal is processed by successive input blocks of samples, where the calculations made on an input block under consideration take into account only the original or calculated samples belonging to the input block under consideration, and where the input block under consideration and the following input block overlap over a predetermined number of original samples. Output blocks are formed, where each output block corresponds respectively to an input block.

Abstract: An offset level detection method for auto color gain control of analog video signals, which is used to find an optimal offset level for determining the input of the auto color gain control. The method includes at least the following steps: First, a lower limit of the min of analog video signals is determined. The position of the lower limit of the min is set as a first min. An upper limit of the min is searched backwards from the first min. The position of the upper limit of the min is set as a second min. Finally, the first min and the second min are averaged to obtain an optimal offset level.

Abstract: An intelligent luminance correction system is used in a vision system. The vision system has a video decoder, used to receive a video signal and decode the video signal into three basic components of red, green, and blue. A photodetector is used to detect the luminance of the current environment, so as to export a reference signal. A color correction circuit is used to receive the reference signal and the three component of RGB. The color correction circuit also stores a vision response curve at dark condition and a vision response curve at bright condition, so that the color correction circuit can determine one curve of the vision response curve at dark condition and a vision response curve at bright condition according to environment luminance indicated by the reference signal. The three components of RGB thereby are corrected individual. After correction, the color correction circuit exports the corrected three components of RGB to a display.

Abstract: A web camera system and a method of operating the same, the system including a computer connected to a video camera that outputs a captured image. A program runs on the computer to generate a histogram that provides a distribution of pixel intensities associated with the image. A static image indicating a low contrast image is uploaded to the web server when a width of the distribution is less than a predetermined threshold value; otherwise, the captured image is uploaded to the web server.

Abstract: A method and apparatus for controlling tint in a digital color display system capable of efficiently performing tint control of displayed colors. The tint control method is executed according to the following: (1) when the maximum and the minimum among R, G, B are the maximum gray scale value and the minimum gray scale value respectively, a step of transforming the input color into a color of a different tint based on a use defined maximum transformation value and a transformation direction; (2) when the maximum and the minimum among R, G, B are Dmax and Dmin respectively, a step of transforming the input color into a color of a different tint based on a smaller transformation value and the same transformation direction; and (3) when all values R, G, B are equal, a step of not transforming the input color in accordance with any input set value.

Abstract: A high definition display unit which demodulates, decodes, and processes in relation to chroma and displays a television signal in which a PI (picture) signal and an SI (service information) signal are mixed. A changeover switch 13 connected to an image quality adjusting circuit in a video chroma processing circuit 7 is opened or closed according to an on-off signal S1. showing the superposed period of both signals detected by a decoder 4. If the above on-off signal S1. is on, the changeover switch 13 is opened and the adjustment of image quality is disabled. Therefore, SI display never disappears due to the adjustment of image quality, and the quality of an image can be also adjusted according to an ambient status. Other approaches are also disclosed from preventing image quality adjustment of at least portions of a displayed image containing an information image.

Abstract: A high definition display unit which demodulates, decodes, and processes in relation to chroma and displays a television signal in which a PI (picture) signal and an SI (service information) signal are mixed. A changeover switch 13 connected to an image quality adjusting circuit in a video chroma processing circuit 7 is opened or closed according to an on-off signal SI showing the superposed period of both signals detected by a decoder 4. If the above on-off signal SI is on, the changeover switch 13 is opened and the adjustment of image quality is disabled. Therefore, SI display never disappears due to the adjustment of image quality, and the quality of an image can be also adjusted according to an ambient status. Other approaches are also disclosed from preventing image quality adjustment of at least portions of a displayed image containing an information image.

Abstract: The color balance adjusting device comprises buttons, indicated on a surface of a display device, which can be moved rightward and leftward on the surface, by dragging a mouse. In accordance with the displacement of the buttons, gains of a red component signal, a green component signal and a blue component signal are changed. When a value of pixel data of one of the color components exceeds a saturation range, due to the gain adjustment, the color of a part of the color image indicated on a surface of a display device, in which the saturation occurs, is altered. Further, a comment, implying the occurrence of saturation, is generated by the display device.

Abstract: A surrounding light judging method and a video compensation control apparatus which are capable of securing an optimum quality of picture by detecting a color signal near a video displaying instrument, judging a lighting environment from the detected color signal, and automatically correcting a video data in accordance with the judged lighting environment and a variation in the lighting environment.

Abstract: An environment-compliant image display system, image processing method and information storage medium which can reproduce the same colors at different locations by absorbing any difference in the visual environment. In an individual environment, an image data is generated by absorbing any difference between a reference environment and the individual visual environment by a colored light information processing section 140, based on X, Y and Z values of an image in an image display area measured by a colored light sensor 60 as well as X, Y and Z values measured in the reference environment. A profile for projector input/output is corrected by a profile managing section 130 and then an image is projected by using an L/V drive section 190.

Abstract: The color of plural pixels making up a source video image is corrected by a computer 10, a hard disc device 20 and a picture processing device 30. The computer 10 functions as a parameter setting unit for setting plural parameters for designating the source color and the destination color and a computing unit for computing correction data for color correction from the source color to the destination color using the plural parameters set by the parameter setting unit. The hard disc device 20 stores the source video image and effects color correction in the picture processing device 30 for correcting the color of a pixel corresponding to the source color contained in the source video image to the destination color.

Abstract: To provide an environment-compliant image display system, image processing method, and information storage medium that enable correction of images within a shorter time, a Y value of color signals (Y3, x3, y3) measured by a color light sensor 60 and converted by an Y3x3y3 conversion section 143 is replaced with Y1, which is a Y value of an ideal environment, by a Y replacing section 142; color difference between the replaced color signals (Y1, x3, y3) and ideal color signals (Y1, x1, y1) is obtained by a color difference calculation section 145; and image display information is corrected by using that color difference (&Dgr;x, &Dgr;y).

Abstract: A high definition display unit which demodulates, decodes, and processes in relation to chroma and displays a television signal in which a PI (picture) signal and an SI (service information) signal are mixed. A changeover switch 13 connected to an image quality adjusting circuit in a video chroma processing circuit 7 is opened or closed according to an on-off signal S1, showing the superposed period of both signals detected by a decoder 4. If the above on-off signal S1 is on, the changeover switch 13 is opened and the adjustment of image quality is disabled. Therefore, SI display never disappears due to the adjustment of image quality, and the quality of an image can be also adjusted according to an ambient status. Other approaches are also disclosed from preventing image quality adjustment of at least portions of a displayed image containing an information image.

Abstract: An intelligent luminance correction system is used in a vision system. The vision system has a video decoder, used to receive a video signal and decode the video signal into three basic components of red, green, and blue. A photodetector is used to detect the luminance of the current environment, so as to export a reference signal. A color correction circuit is used to receive the reference signal and the three component of RGB. The color correction circuit also stores a vision response curve at dark condition and a vision response curve at bright condition, so that the color correction circuit can determine one curve of the vision response curve at dark condition and a vision response curve at bright condition according to environment luminance indicated by the reference signal. The three components of RGB thereby are corrected individual. After correction, the color correction circuit exports the corrected three components of RGB to a display.

Abstract: An image processor includes a determination unit which determines an adaptation ratio of a reference white color value with respect to at least two white color values. Also included are a calculation unit which calculates a reference white color value in accordance with the determined adaptation ratio, and a conversion unit which converts an image signal in accordance with the calculated reference white color value.

Abstract: The system and method of the present invention provides an innovative technique and efficient hardware structure for recovering lost or damaged (lost/damaged) compression constants in the encoded domain. In one embodiment, a lost/damaged compression constant is recovered by estimating a compression constant of the block using encoded data of at least one neighboring block of data and other recoverable compression constants of the block.

Abstract: A device and method for automatically adjusting an image condition in a display is, disclosed. The present device and method optimizes the image condition of a display according to individual preferences by taking into account the brightness and color temperature set initially by a user. Particularly, the present invention includes a photo sensor to detect the environmental illumination and a micro processor utilizing the detected data to appropriately adjust the image condition with respect to a user preference.

Abstract: In an ambient light-dependent video-signal processing method including the steps of measuring (LDR) an amount of ambient light to obtain a measured amount of ambient light, and processing (VSP) a video signal in dependence upon the measured amount of ambient light, the video signal is substantially immediately processed when there is a large change in the measured amount of ambient light, while the video signal is delayed being processed until an occurrence of a scene change in the video signal when there is a small change in the measured amount of ambient light.

Abstract: Color display pixels taken in localized groups are transformed from RGB color signals intended for a self-luminous display into WCMYRGBK signals to drive a chromatophore color display device. Each chromatophoric pixel is of one solid color and is selected from the group (White, Cyan, Magenta, Yellow, Red, Green, Blue, Black). Input luminosity resolution is maintained as output brightness resolution and color fidelity is preserved for the localized group. Separate totals are developed for the Red, Green and Blue components of pixels in a pixel group. A step-repeat process selects a specific chromatophore color for each pixel. As a pixel of the group is processed a chromatophore color is selected which best matches pixel color and the RGB components of the selected chromatophore color is subtracted form the group color totals. Very bright pixels are represented by White, light pixels are represented by Cyan or Yellow or Magenta, dark pixels are represented by Red or Green or Blue.

Abstract: An automatic color temperature control device for a video appliance is disclosed which can control the color temperature of a picture displayed on a screen so as to give the viewer the impression of being coolly refreshed when the environmental temperature is high, and the impression of being warmed when the environmental temperature is low.

Abstract: A method and an apparatus performs contrast processing so that the contrast of a video signal displayed on a low contrast display device is improved. The apparatus and method prevent the picture from becoming whitish and from having its apparent contrast reduced, even when external light is present. The apparatus comprises a brightness level converting part for converting the brightness level of a picture to a brightness level which can be displayed with a low contrast display device. The apparatus further includes a contrast improving part for improving the contrast by superimposing a waveform on the input signal to create an optical illusion of a brightness level. A brightness level compensating part is also provided for compensating the brightness value of the light and dark parts of the brightness varying portions in the video input signal so that the light parts get darker and the dark parts get lighter.

Abstract: An image compensation system and methods for video appliances to reproduce an optimum image, by judging exterior environment and by compensating for an original image by the judged exterior environment. According to the system and methods, a color sensor senses color of exterior lighting of an appliance, and provides electrical signals corresponding to color components of the sensed color. The signals are converted into a digital value by an analog-to-digital converter. A microprocessor judges the type of exterior lighting, by the digitized values, and searches for image compensation data according to the judged exterior lighting. It thereby makes a video processor compensate for an original image signal.

Abstract: An image compensation system and methods for video appliances to reproduce an optimum image, by the judged exterior environment and by compensating for an original image by judging exterior environment. According to the system and methods, a color sensor senses color of exterior lighting of an appliance, and provides electrical signals corresponding to color components of the sensed color. The signals are converted into a digital value by an analog-to-digital converter. A microprocessor judges the type of exterior lighting, by the digitized values, and searches for image compensation data according to the judged exterior lighting. It thereby makes a video processor compensate for an original image signal.

Abstract: The present invention relates to a picture adjusting method of a color television and its circuit for obtaining enhanced picture resolution by automatically adjusting the contrast, a brightness and sharpness of a picture in accordance with the ambient brightness, picture brightness, magnitude of RF signals and viewing distances of a remote controller from a television screen, utilizing either a set of fuzzy logic rules with fuzzy logic reasoning, or a look-up table having data corresponding to the detected ambient brightness, picture brightness, magnitude of the RF signals and the viewing distances of the remote controller from the television screen.