通过预测和共线性检验快速提取直线特征

利用直线和直线条带可以方便地描述道路。在道路影像中，直线往往包含有缝隙，直线条带则会包含孔洞以及附着有不规则块。已有的方法在提取这类不甚理想的基元时都有一些缺陷。针对此情况，本文提出一种新的直线提取思路： 首先，提取边缘并细化； 然后，依据结构特点得出直线基本段； 最后，反复利用已获取的部分预测并检测出后续点。同样的思路也可用于直线条带的提取。实验结果证明，该算法具有优良的性能。

THE RAPID EXTRACTION OF THE STRAIGHT LINE AND LINEAR BAND FEATURES BY MEANS OF PREDICTION AND LINEARITY CHECKING

Roads can be represented by straight lines or linear bands conveniently. In a road image, a may contain some fissures while a linear band may contain some holes and have some attached irregular straight line blocks. The utilization of existing approaches to extract such features has some obvious defects. In order to overcome these disadvantages, this paper puts forward a new method for line extraction. The method first extracts and thins edge points, then finds a base line segment according to the structural characteristics, and finally predicts and detects the following points iteratively by making use of the obtained part. The same principle can also be used to extract the linear bands of which a road consists. The experimental results show that this method has excellent performance.