航空图像矩形建筑物自动提取方法研究

The technique for automated rectangle building extraction from aerial images

对航空城区图像自动提取矩形建筑物方法进行了研究。该方法基于从航空城区图像中提取的边缘 ,通过轮廓跟踪、直线提取得出其相应的直线几何图形。本文引入知识定义了几种构成矩形的基本矩形结构元。先提取直线图形中所有可能构成矩形的基本结构元 ,进而采用几何结构元分析的方法 ,根据结构元合并的准则 ,将各种基本结构元通过一定的合并算法合并成矩形结构。试验结果表明 ,本文方法提取矩形房屋具有较高的准确率 ,鲁棒性好 ,运算速度快 。

The approach for extracting rectangle building from aerial urban images has been studied.Several kinds of primitive structures have been defined,which construct the rectangle,according to the human knowledge,to enhance the probability of building detection.Edge elements were detected by a Canny edge filter and linear elements are extracted using splitting method.All kinds of primitive structures have been obtained by analyzing the geometrical structure relation from the straight line gragh that has been produced by edge detection and contour tracking and staight line splitting.We could merge these primitive structures into the rectangles by use of the proposed merging principle.The experimental results show that the approach is times computationally faster than the previous methods.The results of performance assessment also support the robustness and precision of the approach developed.