Based on discrete cosin transform and discrete chebyshev digital watermark.

watermark-DCTDTT\1psnr.m
................\Acc_rate.m
................\airplane.bmp
................\dttmtx.m
................\einstein1.tif
................\einstein2.tif
................\ex_DCT.m
................\ex_DTT_qianru.m
................\ex_DTT_tiqu.m
................\lena512512.bmp
................\lena512512.jpg
................\my_PSNR_rms.m
................\nc.m
................\NKY.bmp
................\NKY.tif
................\NKY11.bmp
................\pepper.bmp
................\psnr.m
................\qianru_lubangxing.m
................\tiffany.bmp
................\tiqu.m
................\tiqu_lubangxing.m
................\water.m
watermark-DCTDTT

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