_copyright.bmp _copyright_small.bmp _key.bmp _lena_std_bw.bmp Kdct1_watermarked.bmp key.bmp lena.bmp Scs.bmp Bdct2_recover.m fdct2_recover_mod.m vdct2_embed.m zdct2_embed_mod.m _copyright.gif Afig11.gif fig13s.gif lena3.gif test.jpg