柱面透视投影模型下的全景环形透镜畸变校正

doi:10.3969/j.issn.1001-2400.2013.01.016

J4 ›› 2013, Vol. 40 ›› Issue (1): 87-92.doi: 10.3969/j.issn.1001-2400.2013.01.016

柱面透视投影模型下的全景环形透镜畸变校正

肖潇;王伟;毕凯

(西安电子科技大学通信工程学院，陕西西安 710071)

收稿日期:2011-11-15 出版日期:2013-02-20 发布日期:2013-03-28
通讯作者: 肖潇
作者简介:肖潇(1982-)，男，讲师，E-mail: xiaoxiao@xidian.edu.cn．
基金资助:
西安电子科技大学基本科研业务经费资助项目(K50510010031)

Panoramic annular lens distortion correction using the cylinder perspective projection model

XIAO Xiao;WANG Wei;BI Kai

(School of Telecommunication Engineering, Xidian Univ., Xi'an 710071， China)

Received:2011-11-15 Online:2013-02-20 Published:2013-03-28
Contact: XIAO Xiao

摘要/Abstract

摘要：

根据全景环形透镜的成像机理特点，提出了用柱面透视投影模型来对图像畸变进行校正．在柱面投影模型中，空间直线的投影不再是直线，而是一个短轴不变的椭圆．首先建立含有畸变参数的全景环形透镜柱面校正模型，将空间直线点映射为柱面的椭圆上的点，然后使用投影长度和为零的条件，将环形像面上的点拟合为柱面上的最佳椭圆，求出变形校正参数，进而校正全景环形像．仿真和真实图像实验表明，环形图像的切向和径向畸变得到了校正，误差达到了亚像素级．

关键词: 全景环形透镜, 柱面透视投影, 切向畸变, 径向畸变

Abstract:

The cylinder perspective projection model is proposed to correct the image distortion according to the imaging feature of the PAL. In the cylinder projection, model a line in the space is not projected to a line but an ellipse whose short axis is constant. Firstly, the PAL correction model which includes the distortion parameters is constructed. The points on the space line are projected to the points on the cylinder under this model. All spherical points are fitted to the best great circle under the condition that the sum of projection lengths of all points. The distortion parameters are obtained during this procedure. Then the panoramic image is corrected. Simulation and real image experiments demonstrate that the correction results of tangential and radial distortions appear satisfactory. The error is controlled at the sub-pixel level.

Key words: panoramic annular lens, spherical perspective projection, tangential distortion, radial distortion

中图分类号:

TP391

肖潇;王伟;毕凯. 柱面透视投影模型下的全景环形透镜畸变校正[J]. J4, 2013, 40(1): 87-92.

XIAO Xiao;WANG Wei;BI Kai. Panoramic annular lens distortion correction using the cylinder perspective projection model[J]. J4, 2013, 40(1): 87-92.

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柱面透视投影模型下的全景环形透镜畸变校正

Panoramic annular lens distortion correction using the cylinder perspective projection model

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