dct,dft,dht三种图像压缩变换之间的比较-DCT, dft, the dht three kinds of image compression transformation

对于变换编码的知识介绍，包括DCT,DHT,HARR,KLT,并对不同变换的性能做了对比-For transform coding knowledge presentation, including DCT, DHT, HARR, KLT, and the performance of different transform to do a comparison