一种改进的角点提取方法  

An Improved Approach for Corner Detection

作　　者：王建琦[1] 邓雁萍[1] 李介谷[1] 

机构地区：[1]上海交通大学图像处理与模式识别研究所,上海200030

出　　处：《上海交通大学学报》2000年第7期913-916,共4页Journal of Shanghai Jiaotong University

摘　　要：提出了一种改进的角点提取算法 ,该算法是基于角点的性质 ,即在角点的某个邻域内 ,图像灰度的变化在任意一条通过该点的直线上都很大 .为了便于对最后的灰度变化值求取极值 ,同时兼顾灰度变化值计算的准确性 ,采用了在方形窗边界上的线性插值 .在插值的基础上 ,可计算出边缘角 ,通过它来对角点候选点作进一步的筛选 .An improved algorithm for corner detection is based on the property of corners that the change of image intensity should be high in all direction. Linear interpolation on the side of the square window was introduced to make it convenient to calculate the extremum of the variance of the image intensity without losing the accuracy of the calculation of variance of the image intensity. On the base of the interpolation, this paper also introduced the notion of edge angle, by which it can wipe off some corner candidate that is falsely reported. The experiments show that this algorithm can achieve a better performance.

关 键 词：图像匹配 角点检测 边缘角 角点提取 图像处理 

分 类 号：TN919.8[电子电信—通信与信息系统] TN911.7[电子电信—信息与通信工程]