实现图像空间旋转，灰度插值操作，插值方法分别是最近邻法和二次线性法。-Achieve the image space rotation, gray-level interpolation operation, interpolation methods are nearest neighbor method and the second linear method.

程序均用matlab编写 ch ex 的文件是信号与系统频谱密度函数或者时移特性的展示 Advanced_Mathematica_picture_zoom是利用二次线性内插值法对彩色图片进行任意倍数的放大 每个程序都含有详细的注释-Programs are written in matlab chex file is spectrum density of signal and system function or moving features of the display