利用已有的摄像头内外参数，将侧视图通过透视变换转换为俯视图，并保存所得到的单应性矩阵H，内含运行实例-Use of existing internal and external camera parameters, the side view through the perspective transformation into top view, and save the resulting homography matrix H, containing a running instance

鸟瞰图变换实例，通过读取摄像机内外参数矩阵和放仿射变换的到的单应性矩阵，获得平面视图的“俯视图”。-Aerial view transform instance, affine transformation to homography by reading the internal and external camera parameters matrix and put, get a plan view of the " plan view."