中文说明：自己根据双线性插值的理解学习编写的matlab程序，能实现任意的放大与缩小，效果还是不错的，虽然比不上专业的，还有平移算法。每条程序后都有注释。
English Description：
According to their understanding of bilinear interpolation, learning to write matlab program, can achieve arbitrary zoom in and zoom out, the effect is good, although not as professional, there are translation algorithm. Each program is followed by a comment.