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摘 要：立体视觉图像校正是加速立体匹配简单而常用的技术之一。采用几何法对使用棱镜的单镜头立体视觉系统图像进行校正，根据成像原理，从图像平面像素点反推到三维实体点的分析运算，利用成像光线几何关系求解虚拟相机外部参数，实现极线的校正，避免了复杂相机标定过程。同时，该算法可以从双棱镜应用推广到多面棱镜的单棱镜立体视觉系统图像校正。实验结果表明，基于几何法对使用棱镜的单镜头立体视觉系统图像校正是有效的。
关 键 词：立体视图；极线校正；图像处理；几何法
Abstract: This paper proposes a geometric approach for rectification on uncalibrated single-lens stereovision using a prism. According to the imaging principle, the points of 3D entity can be estimated from the image plane pixels. In order to rectify epipolar lines, the optical geometry of imaging is utilized to solve virtual camera extrinsic parameters, which avoids the complex camera calibration process. At the same time, the algorithm can be applied torectify images based on single-lens stereovision system using a bi-prism to polyhedral prism. Experimental results are presented to show the effectiveness of the approach.#br# Key words: stereovision; polar correction; image processing; geometrical approach
