液晶与显示, 2019, 34 (8): 778, 网络出版: 2019-10-12  

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
作者单位
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
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.

王司潮, 郑喜凤, 毛新越, 程宏斌, 陈宇. 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. WANG Si-chao, ZHENG Xi-feng, MAO Xin-yue, CHENG Hong-bin, CHEN Yu. Vignetting compensation in the collection process of LED display camera[J]. Chinese Journal of Liquid Crystals and Displays, 2019, 34(8): 778.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!