一种改进的基于转角函数法的面状居民地Morphing变换方法

提出了一种顾及位置偏差与凹部同异性的面状居民地Morphing变换转向角函数方法。该方法通过构造大比例尺居民地的凸包作为中间图形,辅助与小比例尺居民地进行特征顶点匹配,避免因位置偏差造成的特征点误匹配;针对大比例尺居民地的凹部,依据凹部的模式类型,判定凹部边的同异性;最后构建插值模型,得到中间任意尺度下的面状居民地要素。实验证明方法具有良好的适用性和有效性,与原方法相比,能有效避免因特征点误匹配导致的插值结果顶点乱序现象,同时还兼顾了轮廓特征保持与居民地局部相似,能达到较好的Morphing变换效果。

An Improved Morphing Method of Planar Building Based on Steering Angle Function

In this paper,an improved method of planar building based on steering angle function is proposed,whose position deviation and concave heterogeneity are considered.In this method,the convex hull of large-scale buildings is constructed to match feature vertices with small-scale buildings,so as to avoid the mismatching of feature vertices caused by position deviation.According to the mode type of concave part belong to large-scale buildings,it is judged that if the sections of concave part are homogeneity or not.Finally,the interpolation model is constructed to obtain the buildings at any scale in the middle.Experimental results show that the proposed method is more applicable and effective than the original method,and it can effectively avoid vertices disorder of interpolation results caused by mismatching of feature vertices.At the same time,it takes the contour features and local similarity of buildings into account,which can achieve good Morphing results.