计算机工程与应用Issue(14)：168-171,175,5.DOI:10.3778/j.issn.1002-8331.1208-0087
沿梯度方向的改进一阶差分亚像素边缘检测法
Improved first order differential subpixel edge detection method along gradient direction
林琦 1俞水良1
作者信息
- 1. 同济大学 铁道与城市轨道交通研究院，上海 201804
- 折叠
摘要
Abstract
The first order differential subpixel edge detection method is improved along gradient direction.According to the azimuth of each pixel located on curve edge, the difference of its surrounding domain is gained along its gradient direc-tion and the re-projection followed. Theoretically, the improved method compensates for the flaw that normal first order differential method fails to achieve a high accuracy due to the flat differential distribution along rows and columns. Experi-ments demonstrate that the accuracy of the proposed method reaches 0.05 pixel when used to detect circle center and radius, which shows its great advantage compared with the other methods.关键词
亚像素/一阶差分/边缘检测/梯度方向Key words
subpixel/first order difference/edge detection/gradient direction分类
信息技术与安全科学引用本文复制引用
林琦,俞水良..沿梯度方向的改进一阶差分亚像素边缘检测法[J].计算机工程与应用,2014,(14):168-171,175,5.
