image compression final\invZigzag.m .......................\Lena.bmp .......................\Lena2.bmp .......................\main.m .......................\main2.m .......................\my_dct2.asv .......................\my_dct2.m .......................\my_idct2.m .......................\PSNR.m .......................\toZigzag.m image compression final