一种采用容错宽度Hough变换的路网优化方法  

An Optimization Method for Road Nets Using Improved Hough Transform with Width-Tolerant

作　　者：张国英[1] 宋科科[1] 赵鹏[1] 程金龙[1] 

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《测绘科学技术学报》2014年第3期269-273,共5页Journal of Geomatics Science and Technology

基　　金：国家863计划项目(2013AA064303)

摘　　要：采用容错宽度Hough变换对道路提取后形成的基础路网进行优化和修正。经典Hough变换适合直线提取,算法计算过于严格,不适合路网曲折情况下的扰动曲线提取。将容错宽度引入Hough变换中,设置容错宽度,有效弥补了经典Hough变换处理曲折路网的不足。提取直线后,采用连接、延长和裁剪等方法对基础路网进行优化。实验证明,容错宽度Hough变换计算速度快、占用内存更少,有效克服了路网的曲线扰动问题,检测的直线位置更为精准,路网优化效果显著。The basic road nets after the road extraction are optimized and amended by using the width-tolerant Hough transform. The original Hough transform is suitable for line extraction. However, it doesn’ t work well while extracting the line from disturbed curve because of the rigorous algorithm. Therefore the concept of width-tolerant is introduced to the Hough transform by setting tolerance width. It effectively compensates for the lack of original Hough transform processing tortuous road nets. After the line being extracted, the basic road network is optimized by suing connection, extension and shear method. The experimental results show that the improved algorithm has higher precision of line detection with faster speed and less memory for the road nets optimizing.

关 键 词：路网优化 HOUGH变换 容错宽度 曲线扰动 直线斜率 

分 类 号：P237[天文地球—摄影测量与遥感] TP751.1[天文地球—测绘科学与技术]