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浙江大学学报(工学版)
J4  2009, Vol. 43 Issue (11): 2054-2058    DOI: 10.3785/j.issn.1008-973X.2009.11.020
光学仪器     
超半球环形成像系统的图像恢复
赵烈烽,冯华君,白剑,徐之海
（浙江大学 现代光学仪器国家重点实验室,浙江 杭州 310027）
Image restoration for super hemisphere annular imaging system
ZHAO Lie-feng, FENG Hua-jun, BAI Jian, XU Zhi-hai
(State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China)
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摘要：

在实现全景成像的光学系统中,采用圆柱面到平面投影的环形成像系统相比采用中心投影法的传统透镜系统具有边缘视场畸变小、便于图像恢复展开等优点.通过考察环形成像系统所成环形图像与矩形图像之间的映射关系,研究像面上子午弧矢方向最小分辨角的变化规律,得出了超半球环形成像系统在90°视场角处子午弧矢方向CCD采样角分辨率相同的结论,由此可把该视场角对应的圆环像作为基准来确定展开矩形图的宽度和高度.实际的图像恢复过程分为2步：首先将环形图像恢复成三维像空间中的圆柱面,然后把圆柱面展开得到恢复后的矩形全景图.图像恢复中最关键的90°视场角所对应的圆环像位置和环形图像中心点的确定可以用定标实验的方法实现,在图像恢复过程中采用三次样条插值法,得到了较好的恢复效果.
Abstract:

In the realization of panoramic view, the annular imaging system using the flat cylinder perspective is easier to restore panoramic images compared with the ordinary ones designed by the center point perspective because of the merit of low distortion at large angle of view. The mapping relation of the annular images, generated by the annular imaging systems, and the rectangular images was investigated, and the resolution angles on the meridian and sagittal directions on the image plane were discussed. It is concluded that the resolution angles of the system at the sagittal and tangential planes are equal when the super-hemisphere annular imaging system taking photo at the 90° angle of view into a circle image. That circle image can be used as a standard to calculate the height and width of the restored image. There are two steps during the restoration period: the first is to transform the annular image back into a cylinder in three-dimensional space, and the second is to spread out the curved plane into a flat one. The keys before the restoration are to identify the circle image of the 90° angle of view and the center of the annular image. The cubic spline interpolation method was applied in the image restoration as it is the best interpolation method approaching the sinc function.
出版日期: 2009-11-01
:  O 439  
基金资助:

国家“973”重点基础研究发展规划资助项目（2009CB72406);国家“863”高技术研究发展计划资助项目（2007AA12Z150).
通讯作者: 冯华君，男，教授.     E-mail: fenghj@zju.edu.cn
作者简介: 赵烈烽（1980-），男，浙江富阳人，博士生，从事全景成像技术研究.
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引用本文:

赵烈烽, 冯华君, 白剑, 等. 超半球环形成像系统的图像恢复[J]. J4, 2009, 43(11): 2054-2058.

DIAO Lie-Feng, FENG Hua-Jun, BAI Jian, et al. Image restoration for super hemisphere annular imaging system. J4, 2009, 43(11): 2054-2058.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2009.11.020    或    http://www.zjujournals.com/eng/CN/Y2009/V43/I11/2054

[1] 马毅飞,赵文平. 全景成像探测技术性能分析与应用[J]. 现代防御技术, 2006, 34(2): 63-67．
MA Yi-fei, ZHAO Wen-ping. Characteristic analyses and application of omnidirectional imaging technology [J]. Modern Defense Technology, 2006, 34(2): 63-67．
[2] 王道义,黄大为,邬敏贤,等. 全景环形透镜原理与特点剖析[J]. 光学技术, 1998, 24(1): 10-12．
WANG Dao-yi, HUANG Da-wei, WU Min-xian, et al. Principles and characteristics of panoramic annular lens [J]. Optical Technology, 1998, 24(1): 10-12．
[3] POWELL I. Panoramic lens [J]. Applied Optics, 1994, 33(31): 7356-7361.
[4] 朱方明,杨国光. 全景环形透镜环形象的线性化研究[J]. 光子学报, 2001, 30(5): 589-593．
ZHU Fang-ming, YANG Guo-guang. Linearization of annular image of panoramic annular lens [J]. Acta Photonica Sinica, 2001, 30(5): 589-593．
[5] 肖潇,杨国光,白剑. 基于最优参数的全景图像三次样条插值复原[J]. 红外与激光工程, 2007, 36(5): 725-728．
XIAO Xiao, YANG Guo-guang, BAI Jian. Panoramic image restoration based on optimal parameter cubic spline interpolation [J]. Infrared and Laser Engineering, 2007, 36(5): 725-728．
[6] GREGUSS P. Panoramic security [J]. Proceedings of SPIE, 1991, 1509: 55-66．
[7] 白剑,牛爽,杨国光,等. 全景光学环带凝视成像技术[J]. 红外与激光工程, 2006, 35(3): 331-335．
BAI Jian, NIU Shuang, YANG Guo-guang, et al. Panoramic optical annular staring imaging technology [J]. Infrared and Laser Engineering, 2006, 35(3): 331-335．
[8] 刘金根,刘上乾. 一种新的图象展开算法[J]. 光子学报, 2002, 31(2): 213-216．
LIU Jin-geng, LIU Shang-qian. A new algorithm for image expansion [J]. Acta Photonica Sinica, 2002, 31(2): 213-216．
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