全彩LED显示屏亮度检测与校正算法

严利民; 潘浩; 杜斌

光学技术, 2017, 43 (2): 158, 网络出版: 2017-04-10

全彩LED显示屏亮度检测与校正算法

Algorithm of brightness detection and correction on full-color LED display

论文大纲

严利民 ^*潘浩杜斌

作者单位

上海大学微电子研究与开发中心, 上海 200072

图像处理 LED显示亮度均匀性阈值分割 image processing LED display brightness uniformity threshold segmentation

摘要

针对全彩LED显示屏亮度均匀性问题, 介绍了一种基于CCD相机的全彩LED显示屏亮度检测和校正算法。首先利用CCD相机获取显示中的图像, 通过数学形态学和大津法对图像进行去噪和阈值分割处理, 确定LED灯点的中心位置, 然后使用最佳包含圆方法统计分析各个灯点的相对亮度值, 并计算出其三色校正系数矩阵。实验证明, 该算法检测速度快, 校正效果较好, 从而改善了显示的质量, 延长了显示屏的使用寿命。

Abstract

An algorithm of brightness detection and correction of full-color LED display based on CCD camera is introduced. Images of the LED display are acquired by using a CCD camera. The center position of LED light is determined through threshold segmentation and denoising by using mathematical morphology and OTSU. And then the method of best comprising round is used to determine the relative brightness, and the correction coefficient matrix of each light spot is calculated. Experimental results show that this method has fast speed of detection and good correction effect. It improves the quality of the display and increases the life time of the display.

参考文献

[1] 冯玉森,等. LED 显示单元显示缺陷检测［J］. 电子科技, 2013, 26(9): 185-188.

FENG Yusen, et al. Detection of display unit region defect in LED［J］. Electronic Sci & Tech,2013, 26(9): 185-188.

[2] 宋新丽, 等. 基于灰度直方图的LED显示屏亮度均匀性评估方法［J］. 液晶与显示, 2009, 24(1): 140-144.

SONG Xinli, et al. Luminance uniformity evaluation for LED display panel based on gray histogram［J］. Chinese Journal of Liquid Crystals and Displays, 2009, 24(1): 140-144.

[3] 常宇, 等. 一种全彩LED显示屏亮度均匀性快速检测方法［J］. 灯与照明, 2009, 33(4): 33-35.

CHANG Yu, et al. A fast detection method for brightness uniformity of full color LED display screen［J］. Light & Lighting, 2009, 33(4): 33-35.

[4] 董文晓. 基于CCD相机测量的LED显示屏亮度和色度均匀性算法研究［D］. 西安: 西安电子科技大学, 2012.

DONG Wenxiao. The brightness and chroma uniformity measurement for LED display screen using CCD camera［D］. Xian: Xidian University, 2012.

[5] 赵星梅. LED 显示屏亮度非均匀性逐点校正技术的研究［D］. 西安: 西安电子科技大学, 2009.

ZHAO Xinmei. Research on the spot-spot correction techniques for luminance ununiformity of LED display［D］. Xian: Xidian University, 2009.

[6] CHIU H J, et al. A cost-effective PWM dimming method for LED lighting applications［J］. International Journal of Circuit Theory and Applications, 2015, 43(3): 307-317.

[7] 赵梓权,等. LED显示屏的色域校正［J］. 液晶与显示, 2013, 28(1): 92-98.

ZHAO Ziquan, et al. Color gamut correction of LED displays［J］. Chinese Journal of Liquid Crystals and Displays,2013, 28(1): 92-98.

[8] LIAO C C, et al. A cost-effective image-processing approach to improving the uniformity of LED panels［C］∥ Proceedings of 2013 8th IEEE conference on industrial electronics and applications (ICIEA). Melbourne: IEEE, 2013: 1135-1140.

[9] ZHANG X, et al. Application of image smoothing algorithm ［C］∥Proceedings of 2010 3rd international congress on image and signal processing (CISP). Yantai: IEEE, 2010: 2505-2509.

[10] TSAI M J, et al. Color quality inspection and compensation for color LED display modules［J］.IEEE Proceedings of 2011 International Conference on Machine Learning and Cybernetics (ICMLC), 2011, 4: 1720-1725.

[11] NI X H, et al. Realization of nonuniformity correction of LED display panel based on FPGA［C］∥Proceedings of 2012 2nd international conference on computer science and network technology (ICCSNT). Changchun: IEEE, 2012: 1839-1842.

严利民, 潘浩, 杜斌. 全彩LED显示屏亮度检测与校正算法[J]. 光学技术, 2017, 43(2): 158. YAN Limin, PAN Hao, DU Bin. Algorithm of brightness detection and correction on full-color LED display[J]. Optical Technique, 2017, 43(2): 158.

全彩LED显示屏亮度检测与校正算法

关于本站 Cookie 的使用提示

全站搜索

全彩LED显示屏亮度检测与校正算法

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索