High precision measurement method of parameters of plane circle based on stereo vision
基于立体视觉的平面圆参数高精度测量算法*

This paper proposed a high precision measurement method of plane circle parameters based on stereo vision to solve the certain deficiency which existed in current method of measuring the center and radius parameter of plane circle.Firstly,using the edge grouped algorithm and ellipse fitting algorithm,extracted the ellipse shape in stereo image.Secondly,acquired the 3D coordinate of points in the circle shape by the grouping stereo matching algorithm. Lastly through the three-dimension plane fitting algorithm, transformation of coordinates algorithm, circle fitting algorithm and transformation of coordinates inversely,calculated the plane circle parameters.The experiment shows that the method can decrease the distortion caused by perspective projection and can improve the measurement accuracy.