done to the original signal DCT algorithm : Cox Piva and others made the DCT technology classic. Cox using random number generator producing standard normal sequence information as a watermark image of the overall DCT, DC coefficient selection removed outside some lower frequency coefficient superposition watermark information Piva will be replaced by images of the entire IF part. The original signal block, before making the DCT algorithm : Wu Hsu and put images 8* 8 block, a binary sequence as watermarks Add DCT IF; Some scholars calculated whole image of DCT, a real sequence embedded IF DCT coefficients. IF the choice is a good one to minimize the embedded information to the subjective visual images; Meanwhile, try to avoid Compression right watermark information possible losses. There

Packet : 186355数字水印.rar filelist
数字水印\cmp_cox_sig.c
数字水印\cmp_dct.c
数字水印\cmp_dct8x8.c
数字水印\dct.c
数字水印\dct.h
数字水印\gen_cox_sig.c
数字水印\gray.c
数字水印\gray.h
数字水印\readme.txt
数字水印\signature.c
数字水印\signature.h
数字水印\sort.c
数字水印\sort.h
数字水印\wm.c
数字水印\wm.h
数字水印\wm_cox_d.c
数字水印\wm_cox_e.c
数字水印\cmp_cox_sig.dsp
数字水印\Debug
数字水印\cmp_cox_sig.ncb
数字水印\cmp_cox_sig.plg
数字水印\cmp_cox_sig.dsw
数字水印\dct.ncb
数字水印\dct.plg
数字水印\dct.dsp
数字水印\dct.dsw
数字水印\cmp_cox_sig.opt
数字水印\dct.opt
数字水印

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