Vignetting compensation in the collection process of LED display camera

Si-chao WANG; Xi-feng ZHENG; Xin-yue MAO; Hong-bin CHENG; Yu CHEN

doi:10.3788/YJYXS20193408.0778

您当前的位置：

首页 >

文章列表页 >

Vignetting compensation in the collection process of LED display camera

Materials and Devices | 更新时间：2020-12-14

- Vignetting compensation in the collection process of LED display camera
- Chinese Journal of Liquid Crystals and Displays Vol. 34, Issue 8, Pages: 778-786(2019)
- 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：
- 基金信息：
- DOI：10.3788/YJYXS20193408.0778
  CLC： TN27
- Received：10 April 2019，
  
  Accepted：07 May 2019，
  
  Published：05 August 2019
- 稿件说明：
移动端阅览
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：

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

关积珍, 陆家和. LED显示屏的技术及其市场和产业发展[J].激光与红外, 2003, 33(6):466-470.

GUAN J Z, LU J H. The technology, market and industrial development of LED display panel[J]. Laser & Infrared , 2003, 33(6):466-470. (in Chinese)

韩周, 袁胜春, 杨城. LED显示屏逐点校正精度探讨[J].电子科学技术, 2014, 1(3):381-384.

HAN Z, YUAN S C, YANG C. The discussion of precision LED display pixel calibration[J]. Electronic Science & Technology , 2014, 1(3):381-384. (in Chinese)

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

ZHAO Z Q, WANG R G, ZHENG X F, et al. Color gamut correction of LED displays[J]. Chinese Journal of Liquid Crystals and Displays , 2013, 28(1):92-98. (in Chinese)

李晶, 赵建科, 昌明, 等.复合面阵CCD摄影相机的实验室辐射定标[J].光学精密工程, 2017, 25(1):73-83.

LI J, ZHAO J K, CHANG M, et al. Radiometric calibration of photographic camera with a composite plane array CCD in laboratory[J]. Optics and Precision Engineering , 2017, 25(1):73-83. (in Chinese)

赵梓权, 王瑞光, 郑喜凤, 等.用彩色CCD相机测量发光二极管显示屏的色度[J].光学精密工程, 2013, 21(03):575-582.

ZHAO Z Q, WANG R G, ZHENG X F, et al. Measuring the chromaticity of LED display screen with color CCD camera[J]. Optical Precision Engineering , 2013, 21(03):575-582. (in Chinese)

丁柏秀, 郑喜凤, 陈宇, 等.发光二极管显示屏CCD图像的修正[J].光学精密工程, 2013, 21(5):1318-1325.

DING B X, ZHENG X F, CHEN Y, et al. Revision of LED display images acquired by CCD camera[J]. Optics and Precision Engineering , 2013, 21(5):1318-1325. (in Chinese)

田志辉, 苗静, 毛新越, 等. LED显示屏相机采集的渐晕校正[J].发光学报, 2016, 37(8):1008-1013.

TIAN Z H, MIAO J, MAO X Y, et al. Calibration of camera vignettingsurface on LED displayscreen[J]. Chinese Journal of Luminescence , 2016, 37(8):1008-1013. (in Chinese)

张鑫, 王瑞光, 陈宇, 等. LED显示屏相机采集影像渐晕的修正[J].光学精密工程, 2010, 18(11):2332-2338.

ZHANG X, WANG R G, CHEN Y, et al. Calibration of image vignetting acquired by camera on LED display panel[J]. Optics and Precision Engineering , 2010, 18(11):2332-2338. (in Chinese)

何凯, 赵红颖, 刘晶晶.航空遥感影像渐晕复原方法[J].吉林大学学报:工学版, 2007, 37(6):1447-1450.

HE K, ZHAO H Y, LIU J J. Vignetting correction method for aviatic remote sensing image[J]. Journal of Jilin University:Engineering and Technology Edition , 2007, 37(6):1447-1450.

PICCININI F, LUCARELLI E, GHERARDI A, et al . Multi-image based method to correct vignetting effect in light microscopy images[J]. Journal of Microscopy , 2012, 248(1):6-22.

白燕燕. LED显示屏亮度均匀性评价方法的研究[D].西安: 西安电子科技大学, 2013. http://cdmd.cnki.com.cn/Article/CDMD-10701-1013296782.htm

BAI Y Y. Research on the evaluation method of luminace uniformity of LED display[D]. Xi'an: Xidian University, 2013. (in Chinese)

宋新丽, 郑喜凤, 凌丽清, 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 X L, ZHENG X F, LING L Q, 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. (in Chinese)

王宇庆, 刘维亚, 丁铁夫, 等.基于CCD图像的LED显示屏亮度均匀性评估方法[J].液晶与显示, 2014, 29(1):137-145.

WANG Y Q, LIU W Y, DING T F, et al. Assessment method for luminance uniformity of LED display based on CCD image[J]. Chinese Journal of Liquid Crystals and Displays , 2014, 29(1):137-145. (in Chinese)

龙兴明. InGaN/GaN发光二极管的数学物理模型和特性及最优驱动电流研究[D].重庆: 重庆大学, 2012. http://cdmd.cnki.com.cn/Article/CDMD-10611-1013008072.htm

LONG X M. Mathematical and physical models and characteristics of InGaN/GaN light-emitting diode and its optimal drive current[D]. Chongqing: Chongqing University, 2012. (in Chinese)

桂劲征, 陈宇, 苗静, 等.基于HVS的LED显示屏亮度均匀性评估方法[J].液晶与显示, 2012, 27(5):658-665.

GUI J Z, CHEN Y, MIAO J, et al. Luminance uniformity evaluation for LED display panel based on HVS[J]. Chinese Journal of Liquid Crystals and Displays , 2012, 27(5):658-665. (in Chinese)

吴步龙.环境条件及封装工艺对大功率LED模块的可靠性与一致性的影响研究[D].武汉: 华中科技大学, 2012. http://cdmd.cnki.com.cn/Article/CDMD-10487-1013015013.htm

WU B L. Effect of environmental conditions and packaging process on reliability and uniformity of High power LED[D]. Wuhan: Huazhong University of Science and Technology, 2012. (in Chinese)

罗明浩, 肖龙, 俞理云, 等.蓝光LED芯片波长对COB光源颜色一致性的影响[J].半导体技术, 2018, 43(11):823-827.

LUO M H, XIAO L, YU L Y, et al. Influence of the wavelength of blue LED chip on the color consistency of COB[J]. Semiconductor Technology , 2018, 43(11):823-827. (in Chinese)

柴储芬, 李小红. LED封装趋势及面临的挑战[C]//第十二届全国MOCVD学术会议论文集.厦门: 中国有色金属学会, 2012: 1.

CHAI C F, LI X H. Trends and challenges of LED packaging[C]// Proceedings of Papers of the 12 th National MOCVD Academic Conference . Xiamen: China Nonferrous Metals Society: 2012: 1. (in Chinese)

FORBES G W. Optical system assessment for design:numerical ray tracing in the Gaussian pupil:erratum[J]. Journal of the Optical Society of America A , 1989, 6(8):1123.

李炜, 黄心汉, 王敏, 等.基于二维高斯曲面拟合的图像灰度补偿算法[J].华中科技大学学报:自然科学版, 2004, 32(2):43-45.

LI W, HUANG X H, WANG M, et al . Image gray compensation algorithm based on two-dimensional Gauss surface fitting[J]. Journal of Huazhong University of Science and Technology:Nature Science Edition , 2004, 32(2):43-45. (in Chinese)

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Image enhancement processing algorithm for LED display screens using dithering matrix

Positioning and sorting method and application of LED display point

Design of Flat LED Display Screen Based on Mechanical Scanning

Design of LED Synchronization Display System Based on IWT Image Compression Technology

Related Author

Yu-feng CHEN

Zi-cheng XU

Jian-zhe SUN

Gui-xin GUO

Yang ZHOU

Zi-cheng XU

GUO Sheng-wei

XIE Su-xia

Related Institution

Jihua Laboratory

School of Physics Science and Technology, Central South University, Changsha 410083,China,E-mail:denghonggui@163.com

College of Information Engineering, Zhejiang University of Technology, Hangzhou 310014, China, E-mail: hewei5198@yahoo..

Changchun Institute of Optics， Fine Mechanics and Physics， Chinese Academy of Sciences

Changchun Cedar Electronics Technology Co.， Ltd.

AI问答

Address：No.3888 Dong Nanhu Road, Changchun, Jilin, China 130033 Postal code：130033
Tel：0431-86176059 Email：yjxs@ciomp.ac.cn
Technical support is provided by Beijing Founder electronics co., LTD 吉ICP备11002662号-17 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰