Thinning algorithm is a vital process in road extraction.Good thinning results can provide higher efficiency and accuracy in connecting the line segments.In this article,an efficient method of thinning binary edges of UWB SAR image,which is different from traditional morphlogical thinning algorithms,is presented.Combined the theory of geometric principle axis and Hough transform,the proposed method improves the integrity of the edges after thinning while avoiding the spurs and also declines errors while calculating direction of region in thinning.It also offers a good feature of line segments for line segment connecting.%从经典形态学细化方法研究出发,结合超宽带SAR图像特点和超宽带SAR图像道路提取的应用背景,提出了一种基于几何主轴和Hough变换的超宽带SAR图像边缘细化方法.该方法克服了经典形态学细化方法边缘细化中容易出现的毛刺现象和单纯Hough变换对于区域方向判定的误差,提高了道路边缘细化的完整性.其细化后的线基元形态良好,有利于线基元连接成完整的道路.
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