图像的升采样和降采样目录一.降采样......................................................................................................................................31.降采样原理:...............................................................................................................................3(1)时域表达................................................................................................................................3(2)频域分析................................................................................................................................4(3)抽取滤波器的频响特性.........................................................................................................62.图像降采样目的:.......................................................................................................................73.图像将采样仿真...........................................................................................................................7二.升采样......................................................................................................................................81.升采样原理...................................................................................................................................8(1)时域表达................................................................................................................................8(2)频域分析..............................................................................................................................10(3)插值滤波器的频响特性.......................................................................................................102.图像升采样目的.........................................................................................................................123.图像升采样的算法.....................................................................................................................12(1)最邻近插值算法.................................................................................................................13(2)双线性插值算法.................................................................................................................134.图像升采样仿真.........................................................................................................................14三.附录:....................................................................................................................................161.参考文献:.................................................................................................................................162.MATLAB代码............................................................................................................................16(1)图像降采样..........................................................................................................................16(2)图像升采样..........................................................................................................................172一.降采样1.降采样原理:(1)时域表达M倍的降采样是从x(n)中每隔M个样点抽取一个样点,并丢弃其它样点,产生输出序列y(n):3降采样器是时变的线性离散时间系统4(2)频域分析5而,梳状序列由,为便于理解,可代入得其频域关系。先考虑2倍降采样,有:67...