基于透视投影不变性的空间平面多边形识别

Recognition of Planar Polygons in Space Based on Perspective Projection Invariances

在计算机视觉中,平面多边形的识别有着十分重要的意义。本文导出了一种五条直线间的透视投影不变量,提出了透视等价多边形的概念,并且用这种不变量和透视等价多边形的性质实现了空间平面多边形的描述和识别。这种方法的识别结果不但与摄像机的视点位置无关,而且具有比较好的抗噪声性能。实验结果证明了这种方法的有效性。

The recognition of planar polygons has many important applications in computer vision.We derive a group of perspective projection invariants of five general coplane lines and present the concept of perspective equivalent planar polygons (PEPP) in this paper.The invariants and the properties of PEPP may be used to recognize planar polygons.The recognition results are independent of the view points of camera,and more stable in the presence of noises than that of other methods.The experiments have proved the effectiveness of the invariants.