用matlab编写逆投影变换程序，三个m文件分别代表最近邻插值法，双线性插值法，立方卷积插值法，通俗易懂，含有测试图片，打开就能用-Inverse projection transformation program, matlab prepared three m documents represent the nearest neighbor interpolation, the bilinear interpolation and cubic convolution interpolatio

对二维图片进行中心放大，能控制放大的倍数，采用最近邻法-enlarge pictures from the center of it，can control the index for enlargement