利用Sobel-Zernike矩算子的快速亚像素边缘检测方法

A Fast Subpixel Edge Measurement Method Based on Sobel-Zernike Moment Operator

利用Sobel算子快速检测出所有可能的边缘点;再利用Zernike矩算子以亚像素精度重新定 位边缘。为提高定位精度,根据Zernike矩理论,推导了2个77的模板。测试结果表明,该方法定位精度接近于Zernike矩算子,而算法运行时间仅为0.91s。

All the possible edge points are quickly measured by using Sobel operator. The edge is relocated with subpixel accuracy by means of Zernike moment operator. In order to improve locating accuracy, two 77 templates are derived according to Zernike moment theory. The measuring results show that the locating accuracy of this method approaches Zernike moment operator and operation time of this algorithm is only 0.91s.