281 results about "Color coordinates" patented technology

The invention discloses an RGB LED light source calibration mode optimization method and system, and the method comprises the steps: collecting the color coordinates and brightness data of a three-primary-color light source of an RGB LED, and recording the actual optical characteristics; based on the collected data, establishing a physical model of the light mixing effect of the RGB LED light source, and calculating an initial PWM duty ratio corresponding to a target color coordinate and brightness; inputting the initial PWM duty ratio into the intelligent calibration algorithm model, and optimizing and calculating the optimal PWM duty ratio; the optimized PWM duty ratio is written into an MCU, and the MCU controls mixed light output of the RGB LED according to the written duty ratio; and testing and verifying the calibration effect of the RGB LED light source, and adjusting the parameters of the intelligent calibration algorithm model according to the test result. According to the invention, the PWM duty ratio can be dynamically optimized to realize high-precision light mixing output, and rapid repair and real-time adjustment are supported. The invention belongs to the technical field of photoelectricity, and aims to solve the core problem of the existing RGB LED light source calibration technology and improve the consistency of the light source performance and the production efficiency.

The invention provides a processing method and device of a spliced display screen and a spliced display device, and belongs to the technical field of display. The spliced display screen comprises a plurality of sub-display screens spliced together, and the processing method of the spliced display screen comprises the steps that all the sub-display screens are controlled to display a full-white picture, and RGB data of each sub-display screen are detected; converting the RGB data into brightness and color coordinates of the sub display screens; sequentially performing color temperature correction, gamma correction and brightness correction on each sub-display screen according to the brightness and the color coordinates of the plurality of sub-display screens, so that the difference value between the color temperature of each sub-display screen and a target color temperature is not greater than a preset first threshold value, the difference value between the maximum brightness of each sub-display screen and the target brightness is not greater than a preset second threshold value. The display uniformity of the spliced display screen can be improved.

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 provides a display control method and system for a liquid crystal display screen, and the method comprises the steps: carrying out the nonlinear spectrum mapping processing of an input RGB drive value, and obtaining a theoretical emission spectrum through combining with the response characteristics of liquid crystal molecules; calculating a reflection spectrum component in the multilayer structure according to the ambient light spectrum, and superposing the reflection spectrum component with the theoretical emission spectrum to obtain an actual observation spectrum; calculating a difference value between the actual observation spectrum and the target spectrum, and converting the difference value into an RGB correction value through a constraint optimization algorithm to obtain an RGB driving value after ambient light compensation; and calculating actual white point color coordinates, and adjusting the actual white point color coordinates to a standard white point position through a progressive white point migration algorithm. Display parameters can be dynamically adjusted according to real-time ambient light conditions, the influence of ambient light reflection on colors is effectively compensated, meanwhile, color temperature consistency and color accuracy are ensured through white point correction, the display quality under different ambient lights is remarkably improved, and the visual experience of a user is improved.

The invention discloses a light color detection analysis method and system for an LED, and relates to the technical field of LED detection, and the system comprises a light color collection module which is used for obtaining spectrum data generated in the lightening process of a target LED; the time sequence modeling module is used for collecting a plurality of spectral data points at fixed time intervals within a continuous preset time period after the target LED starts to emit light, calculating to obtain a dominant wavelength, a color coordinate and a fitting color temperature value, forming a multi-moment light color parameter sequence, and constructing a time sequence model based on the sequence, and outputting the time sequence model and the corresponding original parameter sequence. According to the method, the change curve of the light intensity and the color coordinates is constructed, and a convergence trend analysis mechanism is introduced, so that the LED light-emitting stable state is automatically judged, wrong judgment caused by unstable early data is effectively avoided, and the representativeness and the accuracy of detection data are improved.

The invention discloses a screen color correction method and device and a storage medium, which are used for improving the correction efficiency. Setting a detection probe and a to-be-calibrated detection instrument, and obtaining a standard screen; determining a detection point coordinate set on the standard screen according to the screen body parameters of the standard screen; lightening the standard screen, displaying a preset XYZ stimulus value standard picture, and adjusting exposure parameters of the detection probe and the detection instrument; detecting XYZ stimulation values of point locations in the detection point coordinate set through the detection probe to generate first color coordinate value data; detecting XYZ stimulus values of point locations in the detection point coordinate set through the detection instrument to generate second color coordinate value data; generating a first correction function set of XYZ stimulus values according to the first color coordinate value data and the second color coordinate value data; and performing screen color correction on a to-be-calibrated detection instrument through the first correction function set.

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 present application belongs to the technical field of projection. Disclosed are a projection display device and a white balance adjustment method. The projection display device comprises a processor. The processor is used for: driving a primary color light source to emit primary color light, and acquiring a first color coordinate value of white light generated by mixing the primary color light; and when the deviation between the first color coordinate value and a standard color coordinate value is greater than a deviation threshold value, adjusting light emission parameters of the primary color light source on the basis of the standard color coordinate value, so that the deviation between a color coordinate value of white light generated by mixing primary color light emitted by the adjusted primary color light source and the standard color coordinate value is less than or equal to the deviation threshold value, wherein the standard color coordinate value is a white light color coordinate that the projection display device is expected to achieve. Thus, by means of accurate color control and correction, the projection display device can reduce color distortion and deviation and improve the definition and contrast of images, thereby enhancing the display stability and consistency.

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.

Provided in the embodiments of the present description are an image processing method, and a device and a storage medium. The method comprises: acquiring an image to be subjected to matting; determining the distance between color coordinates of each pixel point in said image and a predetermined hyperplane, wherein the hyperplane is a classification boundary of a background color and a non-background color of said image; and on the basis of the distance which corresponds to each pixel point, determining the probability of each pixel point being a foreground area of the said image, so as to perform matting processing on said image on the basis of the probability. In the embodiments of the present application, the distribution range of a background color accurately defined by means of a high-dimensional hyperplane can be used, so that a foreground area and a background area, which are obtained by means of matting, are also more accurate, thereby obtaining a matted image which is natural in transition.

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 invention relates to the technical field of curved surface display, and discloses a display compensation method and system of a curved surface display panel. The method comprises the following steps: acquiring original brightness data of the curved surface display panel at different visual angles, and establishing a compensation reference library containing an incidence relation between a brightness attenuation gradient and a curvature radius; dividing a main compensation area, a transition compensation area and an edge compensation area according to the reference library, and determining the compensation intensity grade of each area; a dynamic compensation strategy containing a brightness decay prediction model and a color coordinate offset correction model is configured for the main compensation area; after generating an initial compensation parameter set based on the strategy, verifying the effectiveness through curved surface deformation simulation; and if the verification is passed, the parameter set is loaded to the display driving chip, and compensation is completed. According to the method, through accurate reference library construction, refined region division, a dynamic compensation strategy and comprehensive simulation verification, the display consistency of the curved surface display panel is effectively improved, the display quality under different visual angles is improved, and the method is suitable for various curved surface display devices.

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 invention discloses a projector calibration method and device, a storage medium and electronic equipment, and relates to the technical field of projection, and the method comprises the steps: sequentially projecting a plurality of pictures of different colors through a projector, and carrying out the color coordinate collection of the plurality of pictures, and obtaining the test color coordinate data of a plurality of colors; performing combination processing on the test color coordinate data of the plurality of colors according to a projection calibration matrix layout to obtain a test polynomial matrix; performing conversion and rearrangement processing on the test polynomial matrix to obtain a test color gamut matrix matched with the specification of the projection processor; and calculating according to the test color gamut matrix and a standard color gamut matrix to obtain a color gamut mapping conversion matrix, so that the projector performs projection based on the color gamut mapping conversion matrix. According to the invention, the color of the projector can be effectively calibrated, the color distortion improvement effect of the projector is improved, and the user experience is improved.

A display device includes a display panel including a plurality of pixels, and a panel driver coupled to the display panel. The panel driver stores color coordinate compensation data representing a color coordinate compensation value according to a temperature value and a light emitting element efficiency, stores efficiency data representing the light emitting element efficiency according to a gray level, determines temperature values of the plurality of pixels to determine color coordinate compensation values for the plurality of pixels based on the color coordinate compensation data, the efficiency data and the temperature values of the plurality of pixels, generates corrected image data by correcting input image data based on the color coordinate compensation values, and drives the display panel based on the corrected image data.

A lighting apparatus including a controller and an LED luminaire to implement a color temperature from a minimum of 3,000K or less to a maximum of 5,000K or more, the LED luminaire including at least one first light emitter, at least one second light emitter, and at least one third light emitter, in which a triangle region defined by color coordinates of the light emitters includes at least a region on a Planckian locus, and the maximum and minimum color temperatures in the triangle region are 5,000K or more, and 3,000K or less, respectively, and in the CIE-1931 coordinate system, the color coordinates of the first light emitter is closer to 5,000K than those of the second and third light emitters, and the color coordinates of the third light emitter is closer to 3,000K than those of the first and second light emitters.

The embodiment of the invention provides an image processing method and device and a storage medium. The method comprises the following steps: acquiring a to-be-matted image; the distance between the color coordinate of each pixel point in the to-be-matted image and a predetermined hyperplane is determined, and the hyperplane is the classification boundary of the background color and the non-background color of the to-be-matted image; and determining the probability that each pixel point is the foreground region of the to-be-matted image based on the distance corresponding to each pixel point, and performing matting processing on the to-be-matted image based on the probability. According to the embodiment of the invention, the distribution range of the background color can be accurately defined by using a high-dimensional hyperplane, so that the matted foreground region and background region are more accurate, and the matted image with natural transition is obtained.

The embodiment of the invention provides a control method of a backlight unit, a display device, a storage medium and a program product, brightness data of multiple frames of images is acquired, the brightness data comprises brightness values of multiple color light sources, and positive compensation and / or negative compensation are / is performed on the brightness values of the color light sources of at least part of the frames of images. And controlling a difference value between the brightness value sum of each frame of image after compensation and the brightness value sum of each frame of image before compensation to be smaller than a preset difference value, so that the brightness value sum of each frame of image after compensation is close to the brightness value sum of each frame of image before compensation. The temperature rise amount is suppressed through the change of the brightness data, so that when the brightness of the light source in the backlight unit is controlled based on the compensated brightness data, the color drift phenomenon can be suppressed, and the change rate of the brightness and the color coordinates can be reduced.

The invention relates to the technical field of image encryption, in particular to a Logistic mapping encryption method for color coordinate modulation. The method specifically comprises the following steps: exciting rare earth luminescent nanoparticles on a target object through a light source to generate a plurality of color coordinates; obtaining an initial value and a control parameter according to the plurality of color coordinates; constructing a one-dimensional chaotic mapping, obtaining a chaotic sequence based on the one-dimensional chaotic mapping, the initial value and the control parameter, and taking the chaotic sequence as a key stream; and taking the color coordinates as plaintext blocks, and encrypting the plurality of plaintext blocks through an AES symmetric encryption algorithm by using the key stream to obtain a to-be-transmitted ciphertext. According to the method, the calculation efficiency is improved, the usability and the safety of the encryption method are improved, and the problems that an error is caused by the internal instability of a chaotic system in an existing Logistic mapping encryption method and the encryption and decryption efficiency is influenced under the high iteration frequency 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.

A display apparatus and a method of operating the display apparatus are disclosed. The display device includes a display panel including a plurality of pixels and a panel driver coupled to the display panel. The panel driver stores color coordinate compensation data indicating a color coordinate compensation value according to the temperature value and the light emitting element efficiency, stores efficiency data indicating the light emitting element efficiency according to the gray level, and determines the temperature value of the plurality of pixels. A color coordinate compensation value for the plurality of pixels is determined based on the color coordinate compensation data, the efficiency data, and the temperature values of the plurality of pixels, corrected image data is generated by correcting the input image data based on the color coordinate compensation value, and the display panel is driven based on the corrected image data.

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.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The first polyester is contacted with a further organic compound in a volume section V3 to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced in the volume section V3 to obtain a first intermediate mixture. The first intermediate mixture comprises a first intermediate product and, the further organic compound. A b value of the Hunter Lab colour coordinates of the first intermediate mixture is adjusted in a volume section V5. The b value of the Hunter Lab colour coordinates of the first intermediate mixture is adjusted so that b≤0.

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.

This application relates to an image processing method, apparatus, electronic device, and storage medium. The image processing method includes: converting an original image to the optical domain, extracting a luminance channel, and obtaining a first luminance value, where the original image is an HDR image; performing a PQ transform on the first luminance value to obtain a second luminance value in the PQ domain; the calculation formula of the PQ transform used is #imgabs0#L HDR,PQ is the second luminance value, L light1 is the first luminance value, and γ1 is a PQ transform constant; according to the equation of the global mapping curve, converting the second luminance value to a third luminance value to obtain a first intermediate image; converting the first intermediate image from the PQ domain to the optical domain to obtain a second intermediate image; according to the color coordinates of the second intermediate image and the color conversion matrix, converting from the original color gamut to the target color gamut to obtain a target image; the target image is an SDR image. The technical solution of this application can provide SDR image output with high visual quality for HDR images under different brightness conditions, is hardware-friendly, and has a small amount of calculation.

The present invention relates to a LED filament lamp (1) comprising a LED filament arrangement (1') for emitting a white light output, and a control unit for controlling the white light output. The LED filament arrangement (1') comprises (i) a first LED filament component (4) having a first LED light source for emitting a first white light component of a first correlated color temperature and a first color point, the first color point having a first x color coordinate and a first y color coordinate, (ii) a second LED filament component (5) having a second LED light source for emitting a second white light component of a second correlated color temperature and a second color point, the second color point having a second x color coordinate and a second y color coordinate, and (iii) a third LED filament component (6) having a third LED light source for emitting a third white light component of a third color temperature and a third color point, the third color point having a third x color coordinate and a third y color coordinate. Each of the first correlated color temperature, the second correlated color temperature and the third correlated color temperature is different from the other two. The third correlated color temperature is at least 500 K lower than each of the first correlated color temperature and the second correlated color temperature. The first color point is located below the black body locus, the second color point is located on or above the black body locus, and the third color point is located on, or below, or above the black body locus, a color point located on the black body locus being within 10 SDCM from the black body locus, a color point located below or above the black body locus being at least 10 SDCM away from the black body locus. Each of the first x color coordinate, the second x color coordinate and the third x color coordinate is different from the other two by at least a value of 0,05, and / or each of the first y color coordinate, the second y color coordinate and the third y color coordinate is different from the other two by at least a value of 0,05.

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 present application provides a lamp color tuning method, a lamp, and a lighting system. The lamp color tuning method specifically comprises: establishing a coordinate mapping relationship between color coordinates of a lamp and polar coordinates on a hue circle; obtaining initial polar coordinates on the basis of initial color coordinates and the coordinate mapping relationship; obtaining an offset angle; forming target polar coordinates on the basis of the initial polar coordinates and the offset angle; on the basis of the target polar coordinates and the coordinate mapping relationship, obtaining target color coordinates corresponding to the target polar coordinates; and on the basis of the target color coordinates, tuning the color of light emitted by the lamp. By means of the lamp color tuning method, the color of light of a lamp can be rapidly changed on the basis of the value of an obtained offset angle, thereby exhibiting different light effects.