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CN-120496451-B - LED display screen debugging method and system

CN120496451BCN 120496451 BCN120496451 BCN 120496451BCN-120496451-B

Abstract

The application relates to the technical field of display, in particular to a method and a system for debugging an LED display screen, wherein the method comprises the steps of obtaining first calibration data representing physical display characteristics of each pixel area of the LED display screen, wherein the first calibration data describe chromaticity and brightness attenuation caused by long-time operation; the method comprises the steps of extracting a color characteristic abstract of an input source, wherein the color characteristic abstract comprises a main tone range, color space parameters and brightness distribution characteristics, acquiring corresponding second calibration data from a preset calibration strategy library according to the color characteristic abstract, recording a calibration scheme for preferentially guaranteeing the display accuracy of key colors for different color characteristics by the calibration strategy library, and completing automatic color debugging on a display effect based on input signals of the input source by the first calibration data and the second calibration data. The automatic color debugging device has the advantages of automatic color debugging on the display effect of the LED display screen and improvement of debugging efficiency and accuracy.

Inventors

  • ZHANG ZHE
  • WANG ZAO

Assignees

  • 深圳市太龙视觉科技有限公司

Dates

Publication Date
20260508
Application Date
20250718

Claims (9)

  1. 1. The LED display screen debugging method is characterized by comprising the following steps of: Acquiring first calibration data representing physical display characteristics of each pixel area of an LED display screen, wherein the first calibration data describe chromaticity and brightness attenuation conditions caused by long-time operation; extracting a color characteristic abstract of an input source, wherein the color characteristic abstract comprises a main tone range, color space parameters and brightness distribution characteristics; directly retrieving corresponding second calibration data from a preset calibration strategy library according to the color characteristic abstract, wherein the calibration strategy library records a calibration scheme for preferentially guaranteeing the display accuracy of key colors for different color characteristics; Based on the input signals of the first calibration data and the second calibration data applied to the input source, completing automatic color debugging of the display effect; The main tone range refers to the most representative or most concentrated color area in the input source image, and the brightness distribution characteristic refers to the overall distribution condition of pixel brightness in the input source image; The automatic color debugging for the display effect is completed based on the input signals of the first calibration data and the second calibration data applied to the input source, and the automatic color debugging comprises the following steps: applying preset basic calibration data to an input signal of the input source to generate a basic picture, wherein the input signal of the input source refers to input source content which needs to be displayed through an LED display screen; Identifying target pixels corresponding to preset key colors by the basic picture, and acquiring corresponding second calibration data from the calibration strategy library according to the color characteristic abstract of the input source; calculating calibration information of the target pixel based on the first calibration data and the second calibration data; And replacing the pixel corresponding to the target pixel position in the basic picture with the pixel corresponding to the calibration information, thereby completing the automatic color debugging of the display effect.
  2. 2. The method for debugging an LED display screen according to claim 1, wherein the obtaining the first calibration data characterizing the physical display characteristics of each pixel area of the LED display screen comprises: displaying a standardized test pattern in each pixel area of the LED display screen; Obtaining brightness and chromaticity measured values of each pixel area for displaying the standardized test pattern; And comparing the brightness and chromaticity measured values with preset standard values to obtain chromaticity attenuation characteristics and brightness attenuation coefficients of the pixel areas, and storing the chromaticity attenuation characteristics and the brightness attenuation coefficients as the first calibration data.
  3. 3. The LED display screen debugging method of claim 1, wherein said extracting a summary of color characteristics of an input source comprises: performing pixel distribution analysis on the key frame image of the input source, and extracting color space parameters of the key frame image by combining metadata information of the input source; calculating according to the color space parameters to obtain a main tone range and brightness distribution characteristics; the dominant hue range and brightness distribution characteristics are stored in a structured manner as the color characteristic summary.
  4. 4. The LED display screen debugging method of claim 1, wherein the identifying, by the base screen, the target pixel corresponding to the preset key color comprises: Screening candidate color pixels with color values within the preset key color range based on the basic picture; Generating a context feature of the candidate color pixel according to the spatial aggregation degree or the time persistence of the candidate color pixel in the continuous frame pictures of the input source; Comparing the context characteristics with a preset key color judgment rule to obtain a comparison result, wherein the key color judgment rule defines a space or time threshold value for distinguishing the preset key color from an adjacent color; And determining the candidate color pixel of which the comparison result meets the key color judgment rule as the target pixel.
  5. 5. The method for debugging an LED display screen according to claim 4, wherein comparing the contextual characteristics with a preset key color decision rule to obtain a comparison result comprises: acquiring dynamic characteristic indexes representing the variation degree between the continuous frame pictures; According to the dynamic characteristic index, adjusting a space or time threshold value in the key color judgment rule; And comparing the context characteristics with the adjusted key color judgment rules to obtain the comparison result.
  6. 6. The method for debugging an LED display screen according to claim 5, wherein said obtaining a dynamic characteristic index representing a degree of variation between consecutive frames comprises: dividing each frame of picture of the input source into a plurality of picture blocks; Respectively calculating the content variation of each picture block between the continuous frames to generate corresponding block variation indexes; classifying the picture blocks with the similar block change indexes into the same dynamic characteristic partition according to each block change index; determining a partition dynamic index for each dynamic characteristic partition, and combining the partition dynamic indexes as the dynamic characteristic indexes.
  7. 7. The method for adjusting a LED display screen according to claim 6, wherein classifying the picture blocks having the similar block change index into the same dynamic partition according to each block change index comprises: Counting the block change indexes of all the picture blocks corresponding to the current frame picture in the continuous frame picture, and obtaining the numerical distribution of the block change indexes; According to the numerical distribution, determining index aggregation centers representing different dynamic grades; classifying the picture blocks into the corresponding dynamic characteristic partitions according to the approaching degree of each block change index and each index aggregation center.
  8. 8. The LED display screen debugging method of claim 7, wherein said determining an index aggregation center characterizing different dynamic levels from said numerical distribution comprises: Circularly analyzing each numerical distribution, identifying a plurality of local aggregation areas based on local density characteristics of the numerical distribution and taking the local aggregation areas as basic index aggregation centers, wherein the local density characteristic identification comprises the steps of carrying out centralized trend calculation on local neighborhoods of each block change index, and adjusting contribution weights of the block change indexes in the local density characteristic identification based on the deviation degree of the block change indexes and the centralized trend calculation; And when the numerical value of the basic index aggregation center meets a preset stable condition, taking the basic index aggregation center as the final index aggregation center.
  9. 9. An LED display screen commissioning system, the system comprising: The acquisition module is used for acquiring first calibration data representing the physical display characteristics of each pixel area of the LED display screen, wherein the first calibration data describe the chromaticity and brightness attenuation conditions caused by long-time operation; the parameter extraction module is used for extracting a color characteristic abstract of an input source, wherein the color characteristic abstract comprises a main tone range, color space parameters and brightness distribution characteristics; The calibration strategy module is used for directly calling corresponding second calibration data from a preset calibration strategy library according to the color characteristic abstract, wherein the calibration strategy library records a calibration scheme for preferentially guaranteeing the display accuracy of the key colors for different color characteristics; the debugging module is used for completing automatic color debugging on the display effect based on the input signals of the first calibration data and the second calibration data applied to the input source; The main tone range refers to the most representative or most concentrated color area in the input source image, and the brightness distribution characteristic refers to the overall distribution condition of pixel brightness in the input source image; The automatic color debugging for the display effect is completed based on the input signals of the first calibration data and the second calibration data applied to the input source, and the automatic color debugging comprises the following steps: applying preset basic calibration data to an input signal of the input source to generate a basic picture, wherein the input signal of the input source refers to input source content which needs to be displayed through an LED display screen; Identifying target pixels corresponding to preset key colors by the basic picture, and acquiring corresponding second calibration data from the calibration strategy library according to the color characteristic abstract of the input source; calculating calibration information of the target pixel based on the first calibration data and the second calibration data; And replacing the pixel corresponding to the target pixel position in the basic picture with the pixel corresponding to the calibration information, thereby completing the automatic color debugging of the display effect.

Description

LED display screen debugging method and system Technical Field The application relates to the technical field of display, in particular to a method and a system for debugging an LED display screen. Background In order to create unique branding atmosphere and visual impact, curved LED displays are installed in the core area of many shops. The main tasks of the display are to periodically play elaborate on-season advertising films, running show live recordings of international fashion weeks, and some artistic variable visual images tailored specifically for the flagship. These conventionally played picture information are different in source. For example, advertising films are commonly produced by professional film-making companies using film-level recording equipment and post-toning procedures, the pictures of which have a particular artistic style and color orientation. The fashion show video may come from multi-machine site recording, and the basic tone and brightness range of the output picture may be slightly different even after post-processing due to the differences of the light distribution and lens parameters of different machines. And the display content of the LED display screen is not unchanged, and new video clips or images can be temporarily added frequently. The production period of the temporarily added picture information is often short, and the color configuration file, coding format and color management flow of the original picture may be greatly different from those of conventional materials, even if some materials are not strictly color-calibrated when provided. The LED display screen is generally used, is in a high-strength working state for a long time, the heat dissipation conditions of the LED modules in different areas of the screen can be different when the LED modules are installed, the LED display screen is continuously lightened for a long time, and the LED light-emitting units in part of positions can be subjected to the phenomena of rapid light-emitting efficiency attenuation or color coordinate drift compared with other positions. This uneven aging gradually creates areas of color difference on the screen that are not readily noticeable to the naked eye but that can be measured by the instrument, which can destroy the integrity and smoothness of the picture when a large area of solid or gradient color background is displayed. The existing calibration scheme may not effectively cope with the problem of uneven aging of local screen, and is difficult to dynamically optimize according to the specific color characteristics of the input content. In view of the above, there is a need in the art for improvements. Disclosure of Invention The application aims to provide a method and a system for debugging an LED display screen, which have the advantages of automatic color debugging on the display effect of the LED display screen and improvement on debugging efficiency and accuracy. The application provides a debugging method of an LED display screen, which comprises the following steps: The method comprises the following steps: Acquiring first calibration data representing physical display characteristics of each pixel area of the LED display screen, wherein the first calibration data describe chromaticity and brightness attenuation conditions caused by long-time operation; Extracting a color characteristic abstract of an input source, wherein the color characteristic abstract comprises a main tone range, color space parameters and brightness distribution characteristics; acquiring corresponding second calibration data from a preset calibration strategy library according to the color characteristic abstract, wherein the calibration strategy library records a calibration scheme for preferentially guaranteeing the accuracy of key color display aiming at different color characteristics; based on the input signals of the input source, which are applied to the first calibration data and the second calibration data, automatic color debugging of the display effect is completed. Through the scheme, automatic color debugging of the display effect of the LED display screen can be realized, adaptation can be carried out according to the aging condition of the screen and the color characteristics of the input source, and the debugging efficiency and accuracy are improved. Further, the present application also provides that obtaining first calibration data characterizing physical display characteristics of each pixel area of the LED display screen, including: displaying standardized test patterns in each pixel area of the LED display screen; obtaining brightness and chromaticity measured values of the standardized test patterns displayed in each pixel area; And comparing the brightness and chromaticity measured values with preset standard values to obtain physical attenuation characteristics and brightness attenuation coefficients of each pixel region, and storing the physical attenuation characteri