150 results about "Color target" patented technology

A display device capable of early finding a sign such as misregistration or width variation of an emission layer formed by a layer transfer method, and a manufacturing method of the same are provided. In an inspection region 150 outside of an effective region 110, inspection pixels Px2 made up of organic light-emitting elements 10R, 10G and 10B are provided, and a distance W2 between the inspection pixels Px2 on both sides of a color targeted for inspection is shorter than a distance W1 between display pixels Px1 on both sides of the color targeted for inspection. Based on a change in a chromaticity or a spectrum shape of EL or PL light emission of the inspection pixel Px2, a sign such as misregistration of a red-light emission layer 15CR, a green-light emission layer 15CG, is found at an early stage.

The invention discloses a projector and camera simultaneous fast calibration method used for an active projection illumination three dimensional appearance measuring system. The method utilizes a reasonable color design and utilizes the projector for projecting an image with multi-color characteristic points onto a two-dimension planar target with multi-color characteristic points on the basis of the RGB model of a multi-color image; a multi-color camera obtains two images after color blending in a color space of multi-color patterns on the target simultaneously at one time; information of a characteristic point image made on the target and information of a characteristic point image of projection are obtained by image separation; and then the method respectively utilizes the separated characteristic point image made on the target to calibrate the camera, utilizes the separated characteristic point image of projection to calibrate the projector and finally utilizes the principle of binocular stereovision to calibrate the relative position relationship of the camera and the projector, thus completing the calibration of the whole active illumination three dimensional appearance measuring system. As just one image is needed to be shot at each calibration position, the method has the advantages of less measuring data and fast calibration speed.

Color reproducibility needs to be evaluated in consideration of the influence of homogeneity in page image. Hence, a first chart is formed from an image of a uniform density of a region to be evaluated, and data associated with the spectral reflectances of plural points on the first chart are input. Based on the data obtained from the first chart, color differences between a predetermined point and other points on the first chart are calculated. When the calculated color differences fall within a permissible range of heterogeneity of colors in the region, a second chart is formed from an image corresponding to a color target, and data associated with the spectral reflectances of plural points on the second chart are input. Color differences are calculated from the data obtained from the second chart and data associated with the spectral reflectance of the color target.

A color calibration job identification system and method are provided, wherein the job identification data is encoded on a printed page, in a patch code, along with color targets, according to a protocol and format approximately identical to a format of the color targets. The patch code comprises a first portion, including a start code, and a second portion, including job identification data. The first portion of the patch code is comprised of two or more small color patches, each having a predefined color. The second portion of the patch code is comprised of two or more small color patches wherein each of the patches is comprised of a color selected from a plurality of colors, wherein each of the colors is indicative of a unique datum value, preferably an octal digit. The system provides a means for determining correct functioning of a printer and a means for determining an orientation of a printed page in a scanning device.

A color descriptor data structure corresponding to a color device, the color descriptor data structure including a reference color data set corresponding to a reference boundary descriptor representing reference colors of the color device based on measured colors from a reference color target, a plausible color data set corresponding to a plausible boundary descriptor representing plausible colors of the color device which are observable, which encompass at least the reference colors of the reference boundary descriptor, and which include a whitest-white color and a blackest-black color, and a neutral color data set corresponding to neutral colors of the color device, the neutral colors extending in range from the whitest-white color to the blackest-black color.

A color calibration job identification system and method are provided, wherein the job identification data is encoded on a printed page, in a patch code, along with color targets, according to a protocol and format approximately identical to a format of the color targets. The patch code comprises a first portion, including a start code, and a second portion, including job identification data. The first portion of the patch code is comprised of two or more small color patches, each having a predefined color. The second portion of the patch code is comprised of two or more small color patches wherein each of the patches is comprised of a color selected from a plurality of colors, wherein each of the colors is indicative of a unique datum value, preferably an octal digit. The system provides a means for determining correct functioning of a printer and a means for determining an orientation of a printed page in a scanning device.

The invention discloses a calibration method of an optical measuring system of three-dimensional outline structure of an object surface and belongs to the technical field of three-dimensional measuring methods and instruments. The calibration method of the optical measuring system of three-dimensional outline structure of the object surface consists of the followings steps: (1) a black-and-white camera is calibrated; (2) a projector is calibrated; (3) parameters required by a whole system are obtained by a multi-plane calibration method; and the calibration method of the optical measuring system of three-dimensional outline structure of an object surface is characterized in that (4) a target board is a color target board, and the foreground color and the background color of the target board are two colors that have the same reflectivity to the black-and-white camera; (5) in the step (1) of black-and-white camera calibration, a color light that has the same color with one of the foreground color and the background color of the target board is projected onto the target board. Compared with traditional methods that use a black-and-white target board, the calibration method of the optical measuring system of three-dimensional outline structure of the object surface has higher stability and reliability, improves calibration precision, and plays a vital role in the precise measurement aspect of the three-dimensional outline structure of the object surface.

The invention discloses a digital proof color correcting method, comprising the following steps: determining a first color data value corresponding to the currently acquired first objective visual colorimetric value according to the mapping relationship of a first objective visual colorimetric value and a first color data value which are stored; acquiring a second objective visual colorimetric value corresponding to a color target figure according to the color target figure generated corresponding to the first color data value; judging whether the error between the second objective visual colorimetric value and the target objective visual colorimetric value exceeds a preset error range, wherein the target objective visual colorimetric value is as follows: source equipment determines out the first objective visual colorimetric value corresponding to the received second color data value according to the stored second color data value and the first objective visual colorimetric value; and continuously correcting or finishing the color correction according to a judgment result. The invention also discloses a digital proof color correcting device. According to the invention, the color matching accuracy can be improved, and the smoothness of drawing can be ensured.

The invention belongs to the field of computer-generated holography and three-dimensional display, and particularly relates to a time-division multiplexing-based color holographic three-dimensional display method and system. By the display system, a multi-view two-dimensional image of a color target object is obtained by a method of CCD camera or computer graphics; a group of target images suitable for phase-type hologram calculation are generated after a preprocessing transformation process; a corresponding phase-type hologram is calculated by an iterative Fourier transform algorithm and is loaded to a spatial light modulator in a time-division manner; a synchronization control circuit controls red, green and blue three-color light sources to synchronously display in sequence; and three monochromatic holographic reconstructed images are generated on a reconstruction plane in a time-division manner, and corresponding reconstructed image pixels are directionally diffracted to the position at which a pixel-type nano grating is fixed to form different viewpoints, thereby obtaining multi-view color reconstructed images and achieving true color three-dimensional display. The hologram is quickly refreshed and loaded by combining the spatial light modulator, so that the multi-view real color full-parallax dynamic holographic three-dimensional reconstruction of the target object is achieved.

The invention discloses a light-emitting control method, apparatus and system for an LED (light emitting diode) lamp. The light-emitting control method comprises the steps of receiving a control message; analyzing the control message; determining a control mode and a control target value of the LED lamp, wherein the control mode of the LED lamp comprises a lightening mode, a luminance regulation mode, an extinguishing mode and a toning mode, and the control target value comprises a three-color target duty ratio; determining a light-emitting gradual change parameter corresponding to the control mode of the LED lamp; calculating a gradual change PWM duty ratio corresponding to the light-emitting gradual change parameter in the toning process of the LED lamp, wherein the value range of the light-emitting gradual change parameter is from 0.005 to 0.05; outputting a PWM (pulse width modulation) signal to an actuator, wherein the duty ratio of the PWM signal is the gradual change PWM duty ratio; and controlling the LED lamp to give out light in a gradual change manner, wherein the frequency of the PWM signal is greater than 100 hertz. According to the light-emitting control method, apparatus and system for the LED lamp, the relatively soft and uniform light emission of the LED lamp can be realized, the emitted lights can better accord with visual characteristics of human body, and the user experience is improved.

The invention discloses a method for printing and outputting an L<*>a<*>b<*> image in a high-fidelity manner. The method is carried out according to the following steps: step 1, firstly arranging a CMYK electronic color target, and then measuring the L<*>a<*>b<*> value of each color block aiming at a colored output device and through taking the CMYK electronic color target arranged as an input image after being printed and output, and corresponding and storing the CMYK value and the L<*>a<*>b<*> value of each color block to obtain source data for describing the characteristic of the device; step 2, reading the data of the L<*>a<*>b<*> image and carrying out color gamut compression; and step 3, establishing color conversion relation between L<*>a<*>b<*> and CMYK to convert the L<*>a<*>b<*> image into a CMYK image, and printing and outputting. The invention has the advantages that a CMYK printer is taken as an output device, thereby achieving the highly-accurate conversion from the L<*>a<*>b<*> and the CMYK, and achieving the purpose of printing the L<*>a<*>b<*> image in a high-fidelity manner.

The invention discloses a single-channel ink quantity limiting method for a color ink jet printer. The method comprises the steps that firstly, output color targets of a cyan channel, a pinkish redchannel, a yellow channel and a black channel are designed; secondly, the color control function and the ink quantity limiting function of the color ink jet printer are closed, and the output color targets are printed; thirdly, the chromaticity and brightness of all color lumps of the output color targets are measured, and the saturability of each color lump is obtained according to the chromaticity; fourthly, maximum ink quantity thresholds of all the channels are obtained according to the rule of change between dot percentage and brightness and saturability; fifthly, output ink quantities corresponding to all the channels are controlled according to the input dot percentage and the maximum ink quantity thresholds of all the channels. By means of the single-channel ink quantity limiting method, while the output ink quantities are controlled accurately, the output color gamut of the printer can be maximized, the problems of wrinkling, ink piling, overflow and the like caused by an over-limit ink quantity are solved, and therefore the color output capability of the printer is improved.

A color calibration job identification system and method are provided, wherein the job identification data is encoded on a printed page, in a patch code, along with color targets, according to a protocol and format approximately identical to a format of the color targets. The patch code comprises a first portion, including a start code, and a second portion, including job identification data. The first portion of the patch code is comprised of two or more small color patches, each having a predefined color. The second portion of the patch code is comprised of two or more small color patches wherein each of the patches is comprised of a color selected from a plurality of colors, wherein each of the colors is indicative of a unique datum value, preferably an octal digit. The system provides a means for determining correct functioning of a printer and a means for determining an orientation of a printed page in a scanning device.

The invention provides a target color recognition method for video surveillance. The method comprises the steps that a color recognition target area is extracted from a video image; colors of the target area are initialized; color category detection is carried out on all color components h, s and l of the target area; the proportion of each color of the color recognition target area is calculated, and the color with the largest proportion serves as the color of the color recognition target area. According to the method, the Markov random field model is adopted, influence on color recognition from environment changes and target posture changes can be reduced according to the neighborhood position relation of the color recognition target area, and therefore the color recognition rate can be increased, a color target can be effectively positioned in intelligent surveillance, and strong evidence can be provided for solving criminal cases like violation of laws and rules.

Scan-to-print color rendering in a system including a scanner engine and a print engine may include, in an exemplary embodiment, storing or providing an index table of respective scanned values in a scanner color space corresponding to each output color printed by the print engine. A color target may be scanned using the scanner engine to provide digital image data in a scanner color space. For each image-scan pixel, a closest scanned value is selected from the index table for a corresponding output color. A color difference is determined a between the image-scan pixel and the closest value as an error for that image-scan pixel. Color error diffusion is applied to compensate for the color difference by distributing the error to neighbor pixels.

Color reproducibility needs to be evaluated in consideration of the influence of homogeneity in page image. Hence, a first chart is formed from an image of a uniform density of a region to be evaluated, and data associated with the spectral reflectances of plural points on the first chart are input. Based on the data obtained from the first chart, color differences between a predetermined point and other points on the first chart are calculated. When the calculated color differences fall within a permissible range of heterogeneity of colors in the region, a second chart is formed from an image corresponding to a color target, and data associated with the spectral reflectances of plural points on the second chart are input. Color differences are calculated from the data obtained from the second chart and data associated with the spectral reflectance of the color target.

The invention discloses a binocular vision based interaction method. The method mainly comprises the steps that a binocular camera is mounted in front of a screen and covers a certain range in front of the screen; a user moves a pure color target, and a calculation unit controls the binocular camera to synchronously acquire left and right eye images and identify the pure color target, and calculates three-dimensional spatial information of the pure color target; and if the pure color target enters a preset effective spatial region range, the calculation unit maps spatial coordinates of the pure color target into coordinates of a screen coordinate system and transmits effective position information and control information to a computer device of a screen through a communication interface. Correspondingly, the invention furthermore discloses an interactive electronic whiteboard system. By implementing the method, accurate and reliable contact or non-contact type positioning can be realized, and the problems of high cost, large size limitation, relatively large volume and the like of an electronic whiteboard interaction apparatus can be solved.

The invention discloses an automatic establishing and converting method for color models of a computer input device. The steps of the automatic establishing and converting method includes dividing all small color lumps in color lump areas in a complete IT8.7 / 2 color target digital image collected by the computer input device, automatically obtaining red, green and blue (RGB) color values of all the small color lumps, forming an RGB and CIELAB lookup table of the computer input device, dividing device RGB color gamut spaces formed by maximum values and minimum values of the red, the green and the blue colors in the RGB and CIELAB lookup table of the computer input device, establishing RGB sub spaces and color models of the RGB sub spaces from RGB to CIELAB, judging the RGB sub spaces where the pixels of the digital image collected by the computer input device are located, and converting RGB values of the pixels to corresponding CIELAB component values of according to the color models of the RGB sub spaces. According to the automatic establishing and converting method for the color models, the steps are simple, and the accuracy is improved remarkably.

The present invention is directed to a system that produces a characterization target for an existing input / output device using fixed control values and dynamically created control values. The fixed control values are chosen from the existing device color space and provide a sample of the gamut of the device. Important colors are dynamically chosen from a number of different sources including user selections, device target measurements and visual neutrals, and dynamically converted into corresponding colorimetric values. An existing characterization associated with the existing device is used to dynamically convert the colorimetric values into the dynamic control values. The fixed and dynamic control values are used to generate the target. The color patches of the target can be arranged to reduce errors in target reproduction and to allow visual confirmation of the target. The target can then be output, measured and used to characterize the device.

The invention discloses a depth map assisted active contour image matting method and system, and the method comprises the following steps: obtaining a depth map of a color target image, carrying out the processing of the depth map through employing a repair algorithm, and obtaining a repaired depth map; carrying out confidence calculation on the repaired depth map and the target image to obtain adepth confidence map and a color confidence map; carrying out level set segmentation by utilizing the depth confidence map and the color confidence map, obtaining a final target contour, and obtaininga required tripartite graph; and respectively obtaining a matting result of the color image and a matting result obtained by the depth image, setting a color difference degree to measure a distance value between the foreground and the background, when the distance value is smaller than a given threshold T, adopting the color matting result, and otherwise, adopting the depth matting result. The method can better solve the problem of background similarity before and after the image, and is closer to the boundary of the to-be-segmented object in the segmentation process, so that the geometric topology of the object is better maintained, and the required binary segmentation result is obtained.

The invention discloses a television color adjustment method and device. The adjustment method comprises the steps that the luminance value of a current image in a television screen is acquired; according to the luminance value of the current image, the target parameter of a color in the current image is calculated; and according to the color target parameter, the actual parameter of the color is adjusted. The adjustment device comprises an image luminance value acquisition module, a color target parameter calculation module and a color parameter adjustment module, wherein the steps are carried out by the modules. According to the television color adjustment method and device, for different image luminance scenes, the color adjustment is adjusted and corrected; the color parameter adjustment of each color in any luminance is realized; the accuracy of color correction is improved; and a desired color reproduction effect is realized.

The present invention provides a flow chart of a printer calibration method used for color management. The method includes: printing a color target map by using a printer; measuring color lumps of the color target map; according to the measurement result, setting a linear curve used for the printer color management. The present invention provides a printer calibration device used for the color management. The device comprises a print module used for enabling the printer to print the color target map; a measurement module used for measuring the color lumps of the color target map; a setting module used for setting a linear curve used for the printer color management according to the measurement result. According to the method and device of the present invention, the ultimate purpose of the device calibration is achieved.

The invention provides a method and a system for generating an international color consortium (ICC) Profile file in the color management of printing and digital proofing. The method comprises the following steps of: optimizing a Lab value corresponding to a Neugebauer base color according to the measurement data of a color target diagram and a Neugebauer equation; filtering the measurement data of the color target diagram according to the optimized Lab value corresponding to the Neugebauer base color; and generating the ICC Profile file according to the filtered measurement data. Correspondingly, the invention provides the system for generating the ICC Profile file. The system comprises an optimization unit and a filtering unit. In the method and the system, the Lab value corresponding tothe Neugebauer base color in the color target diagram is optimized by utilizing a Neugebauer equation model, and the measured Lab values of all color blocks are filtered by utilizing the optimized Lab value corresponding to the Neugebauer base color, thereby reducing noise interference in the measurement of the color target diagram and improving the smoothness and accuracy of the measurement dataand the quality of the ICC Profile file.

The invention discloses a printer color cycle correction method, device and equipment and a storage medium, and relates to the field of printer color tubes. The printer color cycle correction method comprises the following steps: generating an original color target image; obtaining an LAB calculation value and an LAB printing measurement value; generating a multi-dimensional lookup table; correcting multi-dimensional lookup tables. The printer color cycle correction device comprises an image generation module, a numerical value acquisition module, a multi-dimensional lookup table production module and a multi-dimensional lookup table correction module. The graph printer color cycle correction apparatus includes a processor, a memory, and computer program instructions stored in the memory.Computer program instructions are stored on the storage medium. The printer color cycle correction method, device and equipment and the storage medium are used for solving the technical problems thatin an existing color difference management technology, the color conversion precision is low, and a printer cannot restore the color effect of an original image.

The invention discloses a color self-adaptive compression calculation ghost imaging system and method. The system comprises a PC, a DLP, a color target image, a single-pixel photon detector and a data acquisition and control module. The PC, the DLP and the single-pixel photon detector are connected with the data acquisition and control module. The data acquisition and control module controls the DLP to perform projection at the position of the important coefficients of the Y, U and V components of the color target image under white light, blue light and red light and transmits digital signals obtained through projection of white light, blue light and red light to the PC, and then obtains the respective wavelet important coefficients of the Y, U and V components through linear transformation. Finally inverse wavelet transformation and inverse linear transformation are performed on the Y, U and V components so that the color image is reconstructed. The number of times of sampling is effectively reduced and no loss of important information is guaranteed; and a single-photon camera structure formed by the single single-pixel photon detector and the DLP is utilized so that the system size is reduced and the system structure is simplified.

What is disclosed is a method for determining a color solution which achieves color objectives for a color marking device involves performing the following. In one embodiment, N objectives of interest are identified for a color marking device and a N-dimensional Pareto Front is constructed which comprises a collection of color solutions which accommodates those objectives. The Pareto Front is constructed using an optimization process based upon printer models of the objectives. Color solutions can be at least one color recipe, or a combination of color recipes and process actuators. A target point is selected in an N-dimensional objective space based upon at least one user-selected preference. The target point is then mapped to a point on the Pareto Front. The mapping identifies one of the color solutions which, in turn, is used to generate a spot color for the device. The generated spot color achieves the user-selected preference.

A generalized color calibration architecture and method are disclosed. A first interface receives raw measuring data of a sample from a measuring tool. The data has a color type, and the sample has one or more color targets. Each color target has an arrangement of one or more color patches. A second interface receives the color data type, one or more target identifiers specifying the targets, and a color patch order for each target identifier. The color patch order specifies the arrangement of the color patches of a corresponding color target. A color calibration manager performs the color calibration based on the raw measuring data, the color data type, the target identifiers, and the color patch order for each target identifier. The calibration yields or updates one or more color conversion tables for subsequent use with a device, such as a color printer, or another type of device.

The invention relates to an image rendering method and device, electronic equipment and a storage medium. The method comprises steps of determining the refraction color, reflection color and mapping color of a target pixel point in a three-dimensional model of a to-be-rendered object, and enabling the target pixel point to represent a pixel point to be displayed on a screen in the three-dimensional model; according to the spatial relationship between the normal of the target pixel point on the three-dimensional model and the preset coordinate axis of the world space, selecting at least one ofthe refraction color and the reflection color, and determining the rendering color of the target pixel point according to the selected color and the mapping color; and rendering the target pixel pointaccording to the rendering color. On the premise of embodying the optical characteristics of the objects with transparency, the calculated amount of rendering the objects by the electronic equipmentcan be reduced.