基于数学形态学的建筑物方向的判断

Judgment of Buildings Orientation Based on Mathematical Morphology

建筑物和建筑物群的方向在自动综合处理过程中是非常重要的两个空间约束,对此主要探讨建筑物和建筑物群方向的判断问题。对于单个建筑物的方向,首先采用数学形态学算子膨胀、腐蚀对建筑物多边形进行化简处理,把处理后的多边形与已存在的建筑物模板进行匹配,并根据匹配模板的方向来判断建筑物的方向。在此基础上,发展了建筑物群的方向判断方法——先将其综合处理成一个多边形,然后采用最小约束矩形来判断它的方向。

Orientations of building and building groups are two very important spatial constraints in automatic comprehensive treatment process. The article mainly studies judgment of buildings. For single building, mathematical morphology operator＇ s expansion and corrosion are firstly used to simplify the building polygon. Then, the processed polygon is matched with existing template and finally its orientation is judged according to the template. On this foundation, the article develops a method to judge building groups： first, process the building groups to a polygon and then judge its orientation using minimum boundary rectangle.