摘要
在分析Ghosal提出的基于Zernike正交矩亚像素边缘检测算法的基础上,对Ghosal算法进行了改进。指出了Ghosal算法的两点不足,即没有考虑模板效应和没有考虑边缘梯度方向上的一阶导数模型。针对这种不足提出了改进方法。改进后的算法在计算边缘亚像素坐标时更准确,同时还具有细化边缘的能力,使边缘定位更精确。
Ghosal algorithm is improved, which is based on analyzing an algorithm of subpixel edge detection presented by Ghosal. It is pointed that Ghosal algorithm has two the shortcomings: not to consider the model effect and the first derivative model of the edge along the gradient direction of the edge. The improved method is presented aiming at the shortcomings. The subpixel coordinates of the edge calculated by the improved algorithm are more precise, and the improved algorithm has the ability of the thinning edge and the accurately locating edge.
出处
《光学技术》
CAS
CSCD
2003年第4期500-503,共4页
Optical Technique
基金
国家自然科学基金资助项目(59635160
59575057)
