一种基于线空间的直线抽取算法研究  

A Method for Straight-Line Extraction Based on Line Space

作　　者：张祖勋[1] 吴军[1] 张剑清[1] 

机构地区：[1]武汉大学遥感信息工程学院,武汉市珞喻路129号430079

出　　处：《武汉大学学报（信息科学版）》2004年第3期189-194,共6页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目 ( 4 0 3 0 10 41);高等学校博士学科点专项科研基金资助项目 ( 2 0 0 10 4860 11)

摘　　要：以LOG算子为边缘检测手段 ,对直线段特征的抽取过程进行了研究 ,提出并实现了相关的算法 。This paper proposes an effective approach to extract straight-line feature from digital image. This approach is implemented in a collection of edge detecting based on discontinuity and continuity variation in image and straight-line estimation based on least square template matching algorithm. First, the convolution by LOG algorithm is done to the original digital image to locate the edge by detecting discontinuity variation in image. Then we apply the contour tracing principle to edge fellowing process to find out edge contour and sequentially get initial line feature by splitting the edge contour into short and straight line segment with a rigid threshold. Last, the least square template matching algorithm is used to estimate the initial line by considering it as a whole space for all edges belonging to it and to make a geometrical correction only if it really exists.

关 键 词：图像处理 直线抽取 LOG算子 线空间 

分 类 号：P235.1[天文地球—摄影测量与遥感] TP751[天文地球—测绘科学与技术]