《机电工程》杂志,月刊( 详细... )
中国标准连续出版物号: ISSN 1001-4551 CN 33-1088/TH
主办单位:浙江省机电集团有限公司
浙江大学
主编:陈 晓
副 主 编:唐任仲、罗向阳(执行主编)
总 经 理:罗向阳
出 版:浙江《机电工程》杂志社有限公司
地 址:杭州市上城区延安路95号浙江省机电集团大楼二楼211、212室
电话Tel:+86-571-87041360、87239525
E-mail:meem_contribute@163.com
国外发行:中国国际图书贸易总公司
订阅:全国各地邮局 国外代号:M3135
国内发行:浙江省报刊发行局
邮发代号:32-68
广告发布登记证:杭上市管广发G-001号
在线杂志 |
当前位置: 机电工程 >>在线杂志 |
机器视觉中矩形几何提取和校正
作者:王红军,陈临强*,王磊 日期:2010-06-28/span> 浏览:2959 查看PDF文档
机器视觉中矩形几何提取和校正
王红军,陈临强*,王磊
(杭州电子科技大学 图形图象研究所,浙江 杭州 310018)
摘要:为了提高从图像中提取矩形的效率和精度,提出了一种实用的基于Hough变换和最小二乘拟合相结合的矩形几何提取和校正算法。该算法通过Hough空间累加器的最大值检测出直线;在检测到的直线邻域内,通过最小二乘法拟合得到更精确的直线;由4条直线得到4个交点,并按各个点与中心点的位置关系进行排序;由4对对应顶点,可求出一个透视变换矩阵;最终将四边形内的所有点映射到一个矩形区域内。实验结果证明算法在效率和精度上取得了一个较好的平衡。
关键词:Hough变换;最小二乘法;矩形检测
中图分类号:TP391文献标识码:A文章编号:1001-4551(2010)04-0095-03
Extraction and correction of rectangle geometric date in machine vision
WANG Hongjun, CHEN Linqiang, WANG Lei
(Institute of Graphics and Images Process, Hangzhou Dianzi University, Hangzhou 310018, China)
Abstract: To improving the efficiency and accuracy in rectangle extraction from the image, a practical algorithm about rectangular geometry extraction and calibration was presented based on Hough transform and leastsquare algorithm. A straightline was detected, using the maximum data stored in Hough space accumulator. Then a more accurate line was fitted in the detected line region by using leastsquare algorithm. Four intersection points gotten from four lines were sorted, according to their position`s relationship from each point to the central point. A perspective transform matrix was computed through four pairs of points. All those points in a quadrangle were mapped to a rectangle by multiplied the matrix .The experiment results prove that, this method can achieve a good balance in efficiency and accuracy.
Key words: Hough transform; leastsquare algorithm; rectangle detection
友情链接