基于透视不变量的平面曲线的识别

Recognition of Planar Curves Based on Perspective Invariants

提出一种快速有效的平面曲线的识别方法。在这种方法中,我们从单幅图象中提出表征曲线形状的描述子,该描述子由曲线上透视不变点之间的射影距离不变量构成,且不受物体和摄象机之间的位置、方向以及摄象机物理参数的影响。因此这种识别算法不受透视畸变的限制。本文用一组真实的平面物体进行了识别实验,结果表明这些形状描述子对平面曲线的识别有很好的性能。

An effective method for recognition of planar curves is presented in the paper. Shape descriptors are extracted from single view image in the method and construceted by projective distances between pcrspectively invariant points on the curevs. The descriptors are unaffected by the position and orientation of the curves relative to the camera, and by intrinsic parameters of the camera. As a result, the recognition method is immune from all the perspective effects. The shape descriptors were tested on recognition of planar curve objects. The results of the tests show that the descriptors developed in the paper have very powerful performances for recognition of planar carves.