LED显示屏相机采集过程中的渐晕补偿

王司潮; 郑喜凤; 毛新越; 程宏斌; 陈宇

doi:10.3788/YJYXS20193408.0778

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LED显示屏相机采集过程中的渐晕补偿

材料与器件 | 更新时间：2020-12-14

- LED显示屏相机采集过程中的渐晕补偿
- Vignetting compensation in the collection process of LED display camera
- 液晶与显示 2019年34卷第8期页码：778-786
- 作者机构：
  
  1.中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
  2.中国科学院大学, 北京 100049
  3.长春希达电子技术有限公司, 吉林长春 130103
- 作者简介：
  
  [ "王司潮(1995-), 女, 河北保定人, 硕士研究生, 2017年于吉林大学获得学士学位, 主要从事LED显示技术的研究。E-mail:jlu_wangsichao@outlook.com" ]
  [ "郑喜凤(1965-), 女, 黑龙江庆安人, 研究员, 主要从事信号采集处理, 信息显示, 图像处理等方面的工作。E-mail:zhengxf@ccxida.com" ]
- 基金信息：
  
  十三五国家重点研发计划(2017YFB0404800);长春市科技创新"双十工程"(19SS002);National Key Research and Development Program of China(2017YFB0404800);Changchun Science and Technology Innovation "Double Ten Projects"(19SS002)
- DOI：10.3788/YJYXS20193408.0778
  中图分类号： TN27
- 收稿日期：2019-04-10，
  
  录用日期：2019-5-7，
  
  纸质出版日期：2019-08-05
- 稿件说明：
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王司潮, 郑喜凤, 毛新越, 等. LED显示屏相机采集过程中的渐晕补偿[J]. 液晶与显示, 2019,34(8):778-786.

Si-chao WANG, Xi-feng ZHENG, Xin-yue MAO, et al. Vignetting compensation in the collection process of LED display camera[J]. Chinese journal of liquid crystals and displays, 2019, 34(8): 778-786.
王司潮, 郑喜凤, 毛新越, 等. LED显示屏相机采集过程中的渐晕补偿[J]. 液晶与显示, 2019,34(8):778-786. DOI： 10.3788/YJYXS20193408.0778.

Si-chao WANG, Xi-feng ZHENG, Xin-yue MAO, et al. Vignetting compensation in the collection process of LED display camera[J]. Chinese journal of liquid crystals and displays, 2019, 34(8): 778-786. DOI： 10.3788/YJYXS20193408.0778.

摘要

LED显示屏在采集校正过程中由于相机自身的渐晕特性，无法准确得到每个发光像素亮度信息，导致显示屏经过校正后显示效果不好。为了解决这个问题，本文针对LED发光像素自身的亮度离散特性，提出了一种基于统计学原理的相机渐晕补偿算法。该方法首先通过高斯滤波消除高频混叠噪声，然后通过数据迭代的方式消除LED发光像素的亮度离散性，从而得到了光滑的相机渐晕曲面，最后通过对渐晕曲面取倒数的方法求出相机的渐晕补偿曲面并进行了实验验证。实验结果表明，该方法对相机渐晕进行补偿能够极大程度提高相机采集LED发光像素亮度信息的准确度，使校正后显示屏的任意发光像素的亮度差异由9%降低至0.86%。大大提高了LED显示屏校正后的显示均匀性。

Abstract

In the process of acquisition and correction

the brightness information of each luminous pixel can not be accurately obtained due to the camera's own halo characteristics

which results in poor display effect of the LED display after correction. In order to solve this problem

this paper proposes a camera vignetting compensation algorithm based on statistical principle

which firstly eliminates high-frequency aliasing noise by Gaussian filtering

and then eliminates the brightness dispersion of LED luminous pixels by data iteration

so as to obtain a smooth camera vignetting surface. Finally

through graduation. The reciprocal method of halo surface is used to calculate the camera's halo compensation surface. The camera compensation surface is used to compensate the dizziness of the LED box

and the experimental verification is carried out. The experimental results show that the brightness difference of the LED display after halo compensation is reduced from 9% to 0.86%. The uniformity of LED display is greatly improved

which proves the practicability and effectiveness of this method in practical engineering. This method has been applied in engineering at present.

关键词

Keywords

references

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