125 results about "Color coordinates" patented technology

The invention discloses a method and device for detecting color reducibility of a mobile phone camera and a medium, and relates to the technical field of image quality detection.The method comprises the steps that after geometric alignment is conducted on a color card image set, color block areas are divided, and a cross-light-source color block observation matrix is obtained through color block feature extraction; converting the cross-light-source color block observation matrix into a target color space coordinate, and performing illumination correction to obtain a cross-light-source color coordinate matrix; inputting the cross-light-source color coordinate matrix into a deep learning model, outputting a color block level high-dimensional color embedding matrix, and obtaining a high-dimensional color embedding vector set corresponding to the tested mobile phone camera in combination with an attention weight; calculating a color reducibility error index based on the high-dimensional color embedding vector set in combination with the standard reference library; and performing qualification judgment according to the color reducibility error index to generate a qualification detection conclusion. According to the invention, a stable and reliable technical basis is provided for camera quality detection under a multi-light-source imaging condition.

The invention relates to the technical field of LED display testing, in particular to an LED screen backlight module performance testing system which comprises the steps that a model identification code of a module to be tested is received, a corresponding standard optical parameter set is called, and initial driving current is applied. Actual optical signals driven by different currents are collected through a light sensing probe array and converted into a digital optical measurement value set containing brightness and color coordinate values of multiple sampling points. Comparing the brightness measurement value with a target brightness value point by point to generate a brightness consistency deviation matrix; and judging the color coordinate measurement value and the target range, and generating a color coordinate qualified identifier list. And calculating an actual brightness uniformity value according to the deviation matrix, and comparing the actual brightness uniformity value with a standard threshold value. And if the actual brightness uniformity value reaches the standard and the color coordinates of all the sampling points are qualified, generating a module qualification judgment instruction. According to the system, automatic and high-precision comprehensive evaluation of brightness space uniformity and chromaticity consistency of the backlight module is realized.

The invention discloses a multi-channel multi-color-temperature intelligent light source system for consistency calibration of a camera module and an optimization method, and the calibration system generates PWM signals through an STM32F103ZET6 main control unit of a light source controller to control the light output of each group of cold and warm LEDs so as to provide a stable and adjustable illumination environment; measuring reference brightness and chromaticity parameters of cold light and warm light of each group of LEDs, setting a target brightness value and a color temperature value, and converting the target brightness value and the color temperature value into target chromaticity coordinates; the initial PWM duty ratio of the cold and warm light LED is calculated, a piecewise polynomial nonlinear compensation algorithm is adopted to correct the duty ratio, and the LED is driven to output mixed light meeting the target brightness and color temperature; collecting a large amount of brightness and color temperature data by cyclically and gradually adjusting the duty ratio, and generating an error thermodynamic diagram; and the compensation model coefficient is optimized and updated according to error analysis, so that the light source output keeps high-precision consistency in a full range. Compared with the prior art, the method has the advantages that the brightness and color temperature consistency of the light source can be automatically calibrated and continuously optimized, the accuracy and stability of OTP burning calibration of the camera module are greatly improved, and the production test efficiency and the product imaging quality are improved.

A light-emitting diode device includes light-emitting diodes, a storage module, a control module, a driving module, and a package structure. The light-emitting diodes emit different colors of light. The storage module pre-stores color coordinate reference information and brightness reference information corresponding to a current / voltage of the light-emitting diodes. The control module receives the color coordinate reference information and the brightness reference information corresponding to the light-emitting diodes, and uses the color coordinate reference information, the brightness reference information, the color coordinate requirement information, and the brightness requirement information according to a light mixing algorithm to generate a first control signal. The driving module generates a driving signal according to the first control signal to drive the light-emitting diodes to emit a light having a color coordinate and brightness that meet requirements. The package structure accommodates the light-emitting diodes, the storage module, the control module, and the driving module.

The embodiment of the invention discloses a display device and a control method of the display device, and relates to the technical field of display, the display device comprises a backlight module, a liquid crystal panel and a backlight driving circuit, the backlight driving circuit determines target backlight data according to initial backlight data and preset reference data, and a first target color coordinate is taken as a reference, so that the first target color coordinate is obtained; the initial backlight data is converted into target backlight data, color cast caused by conversion is reduced, and meanwhile, under the condition that the initial backlight data is backlight data corresponding to a white field picture or a gray field picture, the target backlight data obtained through conversion can make at least one of a red light-emitting light source, a green light-emitting light source and a blue light-emitting light source emit light; therefore, the light-emitting color cast phenomenon of the white light-emitting source is improved. Backlight supply is achieved through the light-emitting light sources corresponding to red, green, blue and white, so that the energy consumption of the display device is reduced, and meanwhile the display effect of the display device can be guaranteed.

The invention discloses a near BBL curve LED white light color mixing method, system and lamp, a first color temperature light source and a second color temperature light source are selected in a preset color coordinate area, and a color point range is determined for each of the first color temperature light source and the second color temperature light source based on calculation of an intermediate color temperature point light source color deviation value extreme value on a target light mixing path; and selecting the first color temperature light source and the second color temperature light source of which the color coordinates are located in the corresponding color point range, and adjusting the luminous flux output proportion of the two light sources for light mixing so as to form intermediate color temperature light. The problems that a multi-CCT light and color modulation product adopts two light sources, the color temperature and color tolerance between the two light sources cannot meet the requirements of customers, and the color deviation value of the light sources obviously deviates from a BBL curve are solved.

The application provides a color deviation compensation method and system of an LED atmosphere lamp group, which comprises the following steps: collecting the junction temperature of the LED atmosphere lamp group in real time; obtaining the color deviation corresponding to the junction temperature according to the junction temperature and a preset temperature-color deviation database; the temperature-color deviation database is used to represent the nonlinear mapping relationship between the junction temperature and the color deviation; correcting the preset target color coordinates reversely according to the color deviation to obtain corrected color coordinates; determining the mixing ratio of RGB three channels according to the corrected color coordinates and the three primary color coordinates of the LED atmosphere lamp group; determining the PWM duty cycle of the RGB three channels according to the mixing ratio; and sending the PWM duty cycle to a driving chip to drive the LED atmosphere lamp group to light up. The application improves the color deviation compensation precision.

The invention relates to a color gamut mapping method and device, computer equipment, a chip and a chip module. The method comprises the steps of querying a pre-constructed color gamut boundary corresponding relation based on a target direction axis coordinate value in converted color coordinate values of a sampling point of a to-be-processed image and a chromaticity coordinate value of the sampling point, and obtaining an input color gamut boundary and an output color gamut boundary corresponding to the sampling point; according to the input color gamut boundary and the output color gamut boundary, mapping the color coordinate value to obtain a target color coordinate value corresponding to the sampling point; smoothing the target color coordinate value to obtain a processed target color coordinate value corresponding to the sampling point; and obtaining a target image corresponding to the to-be-processed image based on the processed target color coordinate value. By adopting the method, the color gamut mapping accuracy can be improved.

The invention discloses an RGB-LED spectrum closed-loop system for colorimetry teaching and a color matching method. The system comprises a multi-source input module, a spectrum database module, a dynamic modeling module, an optimization algorithm engine module, a duty ratio calculation module, a PWM driving module and a closed loop verification module. The system is provided with a multi-source input interface, target color coordinates can be obtained, and chromaticity conversion of RGB input is supported; on the basis of the constructed high-precision linear model, solving a normalized strength ratio under constraints by combining an optimization algorithm engine and taking minimization of chromatic aberration as a target; calculating an actual PWM duty ratio according to the actual PWM duty ratio; meanwhile, a spectral irradiation sensor is integrated to collect a mixed color spectrum in real time, actual color coordinates are calculated, and an offset connecting line with an arrow between a target point and an actual point is dynamically drawn in a chromaticity diagram, so that a set of complete visual teaching tool is formed. Compared with a manual color matching scheme, the color mixing precision and the color matching efficiency are greatly improved, and the teaching requirements of colorimetry can be better met.

This application relates to an image processing method, apparatus, and computer device. The method includes: performing face recognition on a target image to obtain a target face region; determining target pixel information for each target pixel in the target face region based on reference pixel information of each reference pixel in a reference face region of each frame of the original image; for each target pixel, converting the target pixel information into color coordinates, and determining the weight of the target pixel based on the hierarchical relationship between the color coordinates and the range of human face coordinates; for each frame of the original image, determining the reference brightness of each reference pixel in the reference face region of the original image based on the weight of each target pixel and the original brightness of each reference pixel in the reference face region of the original image; and determining the current brightness of the target face region based on the reference brightness of each reference pixel in the reference face region. This method can improve the accuracy of face region brightness.

The invention discloses a color calibration method and device, projection equipment and a storage medium, and relates to the technical field of projection. The method comprises the following steps: carrying out white balance calibration under a target color gamut on projection equipment; the calibrated projection equipment sequentially projects a single-color picture of each color in the six original colors; obtaining the current color coordinates of the projected monochromatic pictures of each color in sequence through a color corrector; adjusting the color adjustment parameter corresponding to each color in the projection equipment until the current color coordinate of the monochromatic picture of each color projected again after the parameter adjustment is detected is matched with the standard color coordinate of the monochromatic picture of each color in the target color gamut, and obtaining the standard color adjustment parameter of each color in the projection equipment. Therefore, the projection equipment after white balance calibration can perform color calibration on the to-be-projected picture by using the standard color adjustment parameter corresponding to each color in the six original colors and then output the to-be-projected picture, so that the color accuracy of the projected picture is improved.

The application provides a lamp color adjusting method, a lamp and a lighting system. The lamp color adjusting method specifically comprises: establishing a coordinate mapping relationship between color coordinates of a lamp and polar coordinates on a color circle; obtaining initial polar coordinates according to initial color coordinates and the coordinate mapping relationship; obtaining an offset angle; forming target polar coordinates based on the initial polar coordinates and the offset angle; obtaining target color coordinates corresponding to the target polar coordinates according to the target polar coordinates and the coordinate mapping relationship; and adjusting the color of light emitted by the lamp based on the target color coordinates. Through the lamp color adjusting method, the color of light emitted by the lamp can be quickly changed according to the value of the obtained offset angle, and different light effects can be presented.

The application discloses a kind of LED light-emitting diode light color detection analysis method and system, it is related to LED detection technical field, including: light color acquisition module, for obtaining the spectral data generated in the lighting process of target LED;Timing modeling module, for in the continuous preset time period after target LED starts to emit light, multiple spectral data points are collected at fixed time intervals, main wavelength, color coordinates and fitting color temperature value are calculated to obtain, form multiple time light color parameter sequence, and construct time series model based on the sequence, output time series model and corresponding original parameter sequence.The application realizes the automatic judgment of the stable state of LED light emission by constructing the change curve of light intensity and color coordinates and introducing convergence trend analysis mechanism, effectively avoids the false determination caused by early data instability, and improves the representativeness and accuracy of detection data.

A compensation system of a display device according to an embodiment includes a display panel including a first emission area and a second emission area different from the first emission area, each of the first emission area and the second emission area including one or more pixels, a camera configured to capture the display panel at one or more viewpoints, and a compensation controller calculating color coordinate data of the first emission area and the second emission area and generating grayscale compensation data based on the color coordinate data. The grayscale compensation data may be for controlling grayscale values of the one or more pixels included in the second emission area.

A gamma correction method for a display device determines a first voltage code for a first color corresponding to each of grayscale values based on a target gamma value and a target color coordinate at a reference measurement point, generates a first lookup table including the first voltage code for the first color, determines a second voltage code for the first color corresponding to each of the grayscale values based on the target gamma value and the target color coordinate at a correction measurement point, generates a first color position correction value based on the first voltage code for the first color and the second voltage code for the first color, and performs gamma correction using the first color position correction value and the first lookup table.

The invention relates to a display device, a method of compensating brightness and color of the display device, and an electronic device. The display device includes: a display panel including a plurality of compensation areas, each of the plurality of compensation areas including at least one pixel; a driving controller including a compensation controller and a luminance color compensator, the driving controller performing luminance and color compensation for each of the plurality of compensation regions and generating a voltage code and a data signal; a gamma reference voltage generator receiving the voltage code and generating a gamma reference voltage based on the voltage code; and a data driver connected to the driving controller and the gamma reference voltage generator, and generating a data voltage based on the data signal and the gamma reference voltage. Each of the plurality of compensation regions after luminance and color compensation may have a target gamma value and a target color coordinate. The plurality of compensation regions may be shifted while brightness and color compensation is performed.

A light-emitting diode device comprises a plurality of light-emitting diodes, a storage module, a control module, a driving module and a packaging structure. The light-emitting diodes emit different colored lights. The storage module pre-stores color coordinate reference information and brightness reference information. The control module receives the chromaticity coordinate demand information and the brightness demand information, and generates a first control signal according to the chromaticity coordinate reference information, the brightness reference information, the chromaticity coordinate demand information and the brightness demand information according to a light mixing algorithm. The driving module generates a driving signal according to the first control signal and is used for driving the light emitting diode to emit color coordinates and brightness meeting requirements. The packaging structure is used for accommodating the light emitting diode, the storage module, the control module and the driving module.

The application discloses a method for solving color deviation of a three-color Mini LED backlight liquid crystal display device and a liquid crystal display device, and relates to the technical field of liquid crystal display, and comprises the following steps: adjusting RGB backlight currents of a white field, recording a set of RGB backlight current ratios when color coordinates of the white color reach design target values; adjusting RGB backlight currents of red, green and blue single-color fields respectively, recording a second set of RGB backlight current ratios, so that the RGB synthesis obtains the design target values, and obtaining coordinate points W, R, G and B of the white color, the red color, the green color and the blue color on a CIE chromaticity diagram respectively; performing segmentation processing on a to-be-displayed image, counting average image color coordinates of each block as to-be-displayed colors, obtaining a coordinate point C of the to-be-displayed colors on the CIE chromaticity diagram, and calculating RGB current values of backlight of the block according to relative positions of C, R, G, B and W and the two sets of RGB backlight current ratios. The application can guarantee a color gamut and solve the color deviation phenomenon.

The invention provides a packaging method based on an LED flip chip fluorescent powder pre-coating process. The packaging method comprises the steps that a flip chip is pre-coated with a fluorescent powder layer; carrying out photoelectric testing on the flip chips to obtain color coordinate data of each flip chip, and generating a distribution diagram; obtaining a color point combination area of the flip chip; judging whether all the flip chips are located in the color point combination area or not according to the distribution diagram and the color point combination area; when one or more flip chips are out of the color point combination area, controlling die bonding equipment to combine the flip chips out of the color point combination area into the color point combination area for die bonding based on the distribution diagram and a preset die bonding algorithm, so that all the flip chips are positioned in the color point combination area; through the packaging method provided by the invention, the lamp beads which do not meet the color area requirement are not generated, so that the packaging yield is greatly improved, and the packaging yield can reach 100%.

The invention discloses a gamma debugging method and device and a display panel, and belongs to the technical field of display. The gamma debugging method comprises the following steps: for a target binding point gray scale lower than a preset gray scale, according to a gamma debugging result under a reference binding point gray scale, respectively taking a color coordinate parameter corresponding to each color sub-pixel as a control factor for representing a debugging effect, and adjusting gamma debugging parameters of each color sub-pixel under the target binding point gray scale one by one; wherein the reference binding point gray scale is a binding point gray scale higher than or equal to the preset gray scale. According to the embodiment of the invention, the gamma debugging precision can be improved, and the display effect of the display panel is improved.

The present invention describes a method for preventing work accidents in real time based on three-dimensional images, comprising: receiving a set of requirements that must be met by people in a monitored work area; capturing three-dimensional images of the monitored work area; creating three-dimensional regions of interest in the monitored work area; and processing the three-dimensional images of the three-dimensional regions of interest created with artificial intelligence techniques to identify whether the set of requirements is being met, said processing of the three-dimensional images with artificial intelligence techniques comprising analyzing pixel data and information in three-dimensional coordinates and in color coordinates.

The application discloses a calibration matching method for atmosphere lamp user color, and belongs to the field of atmosphere lamp production technology.The method comprises the following steps: installing K PCBA boards on a lamp shell;measuring color coordinate values and luminous flux values of the atmosphere lamps;taking the color coordinate values and luminous flux values of any atmosphere lamp as calibration data, and calculating a pwm duty cycle;a controller controls a LED driver to drive the K atmosphere lamps to complete primary calibration;removing the PCBA board in any atmosphere lamp, and measuring the actual luminous flux value;comparing the actual luminous flux value with a target luminous flux value to obtain a ratio r;increasing the target luminous flux value Y_t by r times, combining the calibration data, and calculating a pwm target duty cycle;a controller controls a LED driver to drive the K atmosphere lamps to complete secondary calibration;measuring the color coordinate values and luminous flux values of the atmosphere lamps after calibration, and comparing the values with customer standards.The method realizes assembly user color adjustment of multiple styles of atmosphere lamps, meets the matching degree of the colorimetric value control of the atmosphere lamps and the real environment demand, greatly saves production time cost, and improves production efficiency.

The present application relates to curved surface display technical field, disclose a kind of display compensation method and system of curved surface display panel.The method includes collecting the original luminance data under different viewing angles of curved surface display panel, establish the compensation reference library containing the correlation of luminance attenuation gradient and radius of curvature;Again, reference library is divided into main compensation area, transition compensation area and edge compensation area, and the compensation intensity grade of each area is determined;Dynamic compensation strategy containing luminance attenuation prediction model and color coordinate offset correction model is configured for main compensation area;After generating initial compensation parameter set based on the strategy, its effectiveness is verified by curved surface deformation simulation;If verification is passed, parameter set is loaded to display driver chip, and compensation is completed.The present application is suitable for various curved surface display equipment by accurate reference library construction, fine regional division, dynamic compensation strategy and comprehensive simulation verification, effectively improves the display consistency of curved surface display panel, improves the display quality under different viewing angles.

The invention discloses a method and a system for characterizing the influence of stereoscopic display binocular hue difference on a perception effect. The method comprises the following steps: firstly, carrying out physical parameter calibration on the stereoscopic display device to obtain a gamma value and a color coordinate; then, the original image is converted to an LCH space through gamma correction and a color space, a difference value delta H is introduced by adjusting a hue component H, and a test image sequence is generated; carrying out a visual perception experiment to obtain subjective scores of a subject on the comfort level, the stereoscopic impression and the display quality of the image; and finally, performing Gaussian function fitting on the delta H and the average score value, and establishing a quantitative relation model so as to determine an appropriate range of binocular hue difference. The method overcomes the defect that the prior art only depends on physical parameters and neglects the visual perception characteristics of human eyes, realizes objective quantitative evaluation of the stereoscopic display binocular hue difference perception effect, and can be used for guiding the design and quality control of stereoscopic display products.

A cristobalite includes: a d50 particle size selected within a range of from 1 μm to 15 μm; an L color coordinate of greater than 96; a color coordinate of less than 1; and a b color coordinate of 1 or less, in which the cristobalite is a powder. Also provided are compositions containing the cristobalite, coatings formed with compositions, and methods of preparing cristobalite.

The purpose of the present invention is to acquire a uniform standard value for assessing oil property using an optical sensor. An oil diagnostic method according to an aspect of the present invention includes: storing, in a storage device, a calibration curve based on first data and second data, the first data indicating, as a color scale value, a color change of a standard substance having a known color scale value, and the second data indicating a color change based on a result of measuring the standard substance by using an optical sensor; acquiring, from an input device, third data based on a result of measuring oil having unknown color coordinates by using the optical sensor; and calculating, by using a processing device, a color scale value corresponding to the color coordinates of the oil from the third data by referring to the calibration curve.

A processor-implemented method including masking a point cloud according to a mask, the mask being formed as a grid, training a first auto-encoder to reconstruct coordinates and densities of masking points of the point cloud, the masking points respectively corresponding to masking grid cells of the mask, from residual points of the point cloud, the residual points respectively corresponding to residual grid cells of the mask, and training a second auto-encoder to reconstruct colors, the coordinates, and the densities of the masking points from an image corresponding to the point cloud.

The invention discloses a white balance correction method, device and equipment and a storage medium, and belongs to the technical field of display, and the method comprises the steps: obtaining the chromaticity coordinate of a first white point displayed by a display system, the chromaticity coordinate being determined by the proportion of the output brightness of red, green and blue channels corresponding to the first white point; predicting a characteristic curve of a red channel, a green channel and a blue channel of the display system, wherein the characteristic curve indicates a mapping relation between the input gray level and the output brightness; based on the color coordinates of the first white point, the target color coordinates and the characteristic curve, first gain values corresponding to the red channel, the green channel and the blue channel respectively are obtained; and adjusting the output brightness of the red, green and blue channels according to the first gain values respectively corresponding to the red, green and blue channels so as to correct the white balance of the display system. The method can improve the white balance correction efficiency.

The invention provides a color calibration method and system applied to RGB lamp beads, electronic equipment and a storage medium, and the method comprises the steps: in a CIE chromaticity diagram, obtaining and marking three-primary color standard coordinates and corresponding luminous flux standard values of all color channels of original RGB lamp beads under a full duty ratio working condition; the actually measured color coordinates and the preset target color coordinates of the original RGB lamp beads are measured and obtained; constructing a color gamut triangle based on the three-primary color standard coordinates and the actually measured color coordinates, and judging a target area where the target color coordinates are located; determining a target color channel combination which is adjusted preferentially in the original RGB lamp beads; calculating a light source color proportion K value based on a geometrical relationship between the target color coordinate and a three-primary color standard coordinate corresponding to the target color channel combination, and adjusting the luminous flux of the color channel corresponding to the original RGB lamp bead through the light source color proportion K value; and repeating the steps until the distance between the actually measured color coordinate and the target color coordinate is smaller than or equal to a preset threshold value.

Procedure (58) encompassing: Receiving drive current values ​​linked to subpixels in a display (10); Identify (62) at least one proportion of image data (44) comprising a plurality of pixels with substantially uniform brightness and substantially uniform color coordinates; Reducing (64) at least some of the drive current values ​​corresponding to the proportion of image data (44); Do not reduce at least some of the drive current values ​​if the portion of the image data (44) does not include substantially uniform brightness and substantially uniform color coordinates; and Supplying the subpixels with the drive currents (48) that correspond to the drive current values.