Automatic correction of geometric distortion in aerial zoom squint imaging

	Automatic correction of geometric distortion in aerial zoom squint imaging
	Zhou, Q.-F.; J.-H. Liu; X. Wang and M.-C. Sun
	2015
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
卷号	23 期号:10 页码:2927-2942
摘要	For geometric distortion caused by squint imaging of a zoom aerial camera, an automatic simultaneously correction method for both squint trapezoidal distortion and nonlinear distortion of the zoom lens was proposed. Based on the same geometric type between straight line and its ideal projection image, the one-parameter division model was adopted to estimate the distortion coefficient and the distortion center coordinates at different focal lengths by an optimization searching method of variant step length. The effects of focal distance change on the distortion coefficient and distortion center coordinates were researched, then the lens's distortion was corrected to satisfy the ideal pinhole imaging model. By introducing the position and attitude of airplane and the pointing azimuth of the optical axis for the camera, the oblique aerial images specified in the camera frame were georectified into the mapping frame. The pixel intensity after coordinate transformation was resampled to obtain orthorectified images without the lens distortion and squint distortion. The correction experiments were performed for the distortion patterns captured under various focal lengths, positions and attitudes and the actual aerial zoom oblique images, and the results show that this method effectively and accurately corrects the geometric distortion of images. The Root Mean Square Error (RMSE) of image geometric correction is about 2 m when the flight height is 2 500 m with the position and attitude measurement precision given in this article. The precision satisfies the requirements of the follow-up image mosaicing. It concludes that the method is more efficient, easy to realize in automation and has great signifiance for promoting aerial image mosaicing precision, implementing fast positioning and real-time tracking of moving objects. 2015, SCIENCE PRESS. All right reserved.
文章类型	期刊论文
收录类别	EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/56150
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhou, Q.-F.,J.-H. Liu,X. Wang and M.-C. Sun. Automatic correction of geometric distortion in aerial zoom squint imaging[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2015,23(10):2927-2942.
APA	Zhou, Q.-F.,J.-H. Liu,&X. Wang and M.-C. Sun.(2015).Automatic correction of geometric distortion in aerial zoom squint imaging.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,23(10),2927-2942.
MLA	Zhou, Q.-F.,et al."Automatic correction of geometric distortion in aerial zoom squint imaging".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 23.10(2015):2927-2942.

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航空变焦距斜视成像几何畸变的自动校正.c（907KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	浏览请求全文