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清华大学学报(自然科学版)  2017, Vol. 57 Issue (7): 702-706    DOI: 10.16511/j.cnki.qhdxxb.2017.25.025
  计算机科学与技术 本期目录 | 过刊浏览 | 高级检索 |
视觉系统光学渐晕效应非线性补偿方法
丁莹1, 范静涛2, 权巍1, 韩成1
1. 长春理工大学 计算机科学与技术学院, 长春 130022;
2. 清华大学 自动化系, 北京 100084
Nonlinear compensation for optical vignetting in vision systems
DING Ying1, FAN Jingtao2, QUAN Wei1, HAN Cheng1
1. College of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China;
2. Department of Automation, Tsinghua University, Beijing 100084, China
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摘要 视觉系统在工业生产等领域的应用越来越广泛,而光学渐晕效应直接影响着成像系统采集图像的质量,进而影响了视觉检测的精度。该文提出了一种光学渐晕效应非线性补偿方法,基于对渐晕效应的原理分析,定义了图像的相对曝光量,利用耦合采样解耦重建的方式,求解相机响应函数,构建渐晕效应补偿模型对图像进行渐晕效应校正,从而保证光学系统成像质量。实验结果表明:该方法具有可行性,能够有效消除镜头的渐晕效应,为视觉检测系统的高精度检测提供了保障。
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丁莹
范静涛
权巍
韩成
关键词 信息处理视觉检测渐晕效应非线性补偿相对曝光量    
Abstract:Visual inspection systems are being more and more widely applied in industrial production, but optical vignetting directly affects the imaging quality, which affects the inspection accuracy. A nonlinear compensation method for optical vignetting is given which uses the vignetting principle, to define the relative exposure of the image with coupled sampling and decoupling reconstruction to determine the camera response curve. A vignetting compensation model is then developed to eliminate the vignetting effect of the lens to improve the image quality. Tests show that the method is effective and provides excellent vision inspection quality.
Key wordsinformation processing    vision inspection    optical vignetting effect    nonlinear compensation    relative exposure
收稿日期: 2015-10-21      出版日期: 2017-07-15
ZTFLH:  TP391  
通讯作者: 范静涛,助理研究员,E-mail:fanjingtao@tsinghua.edu.cn     E-mail: fanjingtao@tsinghua.edu.cn
引用本文:   
丁莹, 范静涛, 权巍, 韩成. 视觉系统光学渐晕效应非线性补偿方法[J]. 清华大学学报(自然科学版), 2017, 57(7): 702-706.
DING Ying, FAN Jingtao, QUAN Wei, HAN Cheng. Nonlinear compensation for optical vignetting in vision systems. Journal of Tsinghua University(Science and Technology), 2017, 57(7): 702-706.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2017.25.025  或          http://jst.tsinghuajournals.com/CN/Y2017/V57/I7/702
  图1 物体的辐射度与图像的辐照度示意图
  图2 相机平移成像对比图
  图3 Canon5D MarkII相机响应函数曲线
  图4 40mm 焦距拍摄的数字图像I21~I24
  图5 数字图像I21~I24的径向灰度分布
  图6 数字图像I21~I24的校正结果
  图7 数字图像I21~I24校正后的径向灰度分布
  表1 不同方法渐晕效应补偿前后灰度标准差对比表
[1] Yu W, Chung Y, Soh J. Vignetting distortion correction method for high quality digital imaging [C]//Proceedings of the 17th International Conference on the Pattern Recognition. Piscataway, NJ, USA: IEEE, 2004: 666-669.
[2] Yu W. Practical anti-vignetting methods for digital cameras [J]. IEEE Transactions on Consumer Electronics, 2004, 50(4): 975-983.
[3] Zheng Y, Lin S, Kang S B. Single-image vignetting correction from gradient distribution symmetries [J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 2013, 35(6): 1480-1494.
[4] 李炜, 黄心汉, 王敏. 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 Wei, HUANG Xinhan, WANG Min. A compensation algorithm of image based on Gaussian quadrics fitting [J]. Journal of Huazhong University of Science and Technology (Nature Science Edition), 2004, 32(2): 43-45. (in Chinese)
[5] 何凯, 赵红颖, 刘晶晶. 航空遥感影像渐晕复原方法研究 [J]. 吉林大学学报(工学版), 2007, 37(6): 1447-1450.HE Kai, ZHAO Hongying, LIU Jingjing.Vignetting correction method for aviatic remote sensing image [J]. Journal of Jilin University (Engineering and Technology Edition), 2007, 37(6): 1447-1450. (in Chinese)
[6] 何凯, 唐平凡, 王成优. 基于高斯曲面拟合的影像渐晕复原方法 [J]. 电子学报, 2009, 37(1): 67-71.HE Kai, TANG Pingfan, WANG Chengyou.Vignetting correction method of image based on Gaussian quadrics fitting [J]. ACTA Electronica Sinica, 2009, 37(1): 67-71. (in Chinese)
[7] 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.
[8] Coralie C, Magali B, Arnaud D. Comparison of the vignetting effects of two identical fisheye lenses [J]. Leukos the Journal of the Illuminating Engineering Society of North America, 2012, 8(3): 181-203.
[9] Kim S J, Pollefeys M. Robust radiometric calibration and vignetting correction [J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 2008, 30(4): 562-576.
[10] Goldman D B, Chen J H. Vignette and exposure calibration and compensation [C]//Proceedings of the Tenth IEEE International Conference on Computer Vision. Washington DC, USA: IEEE, 2005: 2276-2288.
[11] MENG Hongji, GUAN Wenrui, LIU Can, et al. Algorithm research of vignetting distortion correction based on near-infrared CCD thermometer [C]//International Conference on Design, Manufacturing and Mechatronics. Wuhan, China, 2015: 1290-1298.
[12] Bergues G J, Canali L, Schurrer C, et al. Electronic interface with vignetting effect reduction for a Nikon 6B/6D autocollimator [J]. IEEE Transactions on Instrumentation and Measurement, 2015, 64(12): 3500-3509.
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