Image distortion correction is a prerequisite for distributed aperture system (DAS). Brown model and its aberration (fitness) metric describing radial and tangential distortions of image are introduced. As one of intelligent optimization algorithms, shuffled frog leaping algorithm (SFLA) and its initial population Latin hypercube sampling (LHS), are discussed. Image aberration model (from ray tracing method) and Brown distortion model are simulated and corrected respectively. Results show that characteristic point's positions between origional and corrected are within 2 pixels, which verifies effectiveness of algorithm. Finally, this correction method is applied to correction of target paper by wide-angle CCD camera, and satisfactory results are obtained. The algorithms and simulation results have certain theoretical and experimental significance to development of DAS equipment.
Key words
shuffled frog leaping algorithm /
wide angle distortion /
Latin hypercube sampling /
Brown parameters /
image correction
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
王会峰.一种成像测量图像径向几何畸变的校正方法[J].应用光学, 2010, 31(1):55-59.
郭羽, 杨红, 杨照金, 等. CCD摄像系统镜头的畸变测量[J].应用光学, 2008, 29(2):279-282.
崔洪州, 孔渊, 周起勃, 等.基于畸变率的图像几何校正[J].应用光学, 2006, 27(3):183-185, 215.
李晓彤.几何光学和光学设计[M].杭州:浙江大学出版社, 1997.
冈萨雷斯，伍兹. 数字图像处理(第2版)[M]. 阮秋琦，阮宇智，译.北京：电子工业出版社，2003.
Clarke T A, Fryer J G.The development of camera calibration methods and models [J]. Photogrammetric Record, 1998, 16(91): 51-66.
Swaminathan R, Nayar S K. Non-metric calibration of wide angle lenses [J]. IEEE, 1999(10):1172-1178.
Tsai R Y. A versatile camera calibration technique for high-accuracy 3d machine vision metrology using off-the-shelf TV cameras and lenses[J]. International Journal of Robotics and Automation, 1987, 3(4): 323-344.
Goshtasby A. Correction of image deformation from lens distortion using Bezier patches[J]. Computer Vision, Graphics and Image Processing, 1989, 47(3): 385-394.
Zhang Z Y. Flexible camera calibration by viewing a plane from unknown orientations[C]. Corfu: In Proceedings of the 7th IEEE International Conference on Computer Vision, 1999: 666-673
Zhang Z Y. A flexible new technique for camera calibration [D]. Redmond: Microsoft Research, 1998.
Conrady A E. Decentered lens systems[J]. Monthly Notices of the Royal Astronomical Society, 1919, 79: 384-390.<
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
