哈达玛转换的压缩程序，删人眼较难察觉出变化的高频部份的资料量，来达到资料量缩减的目的。使用较少的位数来表现高频部份。-Hadamard conversion compression process, delete the human eye changes more difficult to detect high-frequency part of the amount of data to achieve the purpose of reducing the amount of data.