摘要
针对MIC角点检测算法具有角点定位不够精确、误检、漏检等缺点,提出一种改进的MIC角点检测算法.为了克服MIC角点检测算法角点定位不准确的缺点,该检测算法利用最小二乘技术对角点局部方向线进行拟合,实现角点的亚像素定位;同时为了克服MIC角点检测易混淆边界点和角点的缺陷,引入检测直线,根据拟合点到检测直线的距离是否大于某一阈值剔除边界伪角点.实验结果表明,改进的MIC角点检测算法角点检测性能明显提高.
For the MIC algorithm＇s disadvantages of being unable to determine precisely the position of comers and tending to detect the false comers and miss the comers, a novel algorithm of comer detection is presented in this paper. According to the novel algorithm, comers are re-located to sub-pixel accuracy by fitting their local orienta- tion lines by the least squares technique. In order to overcome the disadvantage of tending to confuse edge points with comers, introduce detection line and calculate the distance between fit point and detection line. If the distance is less than a threshold, the point is an edge point, otherwise it＇s a comer. The experimental results show that the improved algorithm is more efficient in detecting the corners with accurate location.
出处
《应用科技》
CAS
2011年第9期41-46,共6页
Applied Science and Technology
关键词
MIC算法
角点检测
局部方向线
检测直线
MIC algorithm
comer detection
local orientation line
detection line
