一种改进的灰度矩亚像素边缘检测算法.pdfVIP

2 2 2 2 第 31 卷第 5 期 重 庆 大 学 学 报 Vol. 31 No. 5 　2008 年 5 月 Journal of Chongqing University May 2008 　 　　文章编号 :1000 582X(2008) 05 0549 04 一种改进的灰度矩亚像素边缘检测算法 2 2 2 罗 　钧 ,侯 　艳 ,付 　丽 2 2 (重庆大学 光电工程学院 ,重庆 400030) 摘 　要 :在分析 Tabatabai 提出的灰度矩亚像素边缘检测算法的基础上 ,指出灰度矩算法存在 边缘判断条件不够完善和未能考虑模板效应的问题 ,提出了改进方法 ,考虑 Tabatabai 的灰度矩算 法产生很多虚假边缘 ,改进算法分析了各参数对结果的影响 ,对边缘判断条件进行完善。实验结果 2 表明 ,所改进算法具有抗干扰性、边缘细化能力强 ,定位准确的特点 ,分辨精度可达 0. 06～0. 08 个 像素 。 关键词 :灰度矩 ;边缘检测 ;亚像素 　　中图分类号 : TP391 文献标志码 :A An improved algorithm for subpixel edge detection using gray moment LUO J un , HOU Yan , FU Li (College of Optoelectronic Engineering , Chongqing University 400030 , P. R. China) Abstract : Subpixel edge detection is an important research issues in image measurement . By analyzing t he algorit hm for subpixel edge detection presented by Tabatabai , two shortcomings of gray moment algorit hm were revealed : difficulties in judging edges , and no consideration of the model effect . An improved algorit hm was presented aiming at remedying t he shortcomings. Considering there were many false edges in t he image processed by Tabatabai’ s algorithm , we improved t he edge judging rules of the algorit hm by analyzing t he influence of parameters on t he result . The experimental result s show t hat t he improved algorit hm has good anti jamming and edge t hinning abilities , and high locating accuracy w