利用噪声序列\withmark.bmp
............\lena-.bmp
............\Thumbs.db
............\mark_.bmp
............\psnr.m
............\watermark.m
............\-mark.bmp
............\lena.bmp
............\mark.bmp
............\nc.m
............\watermark.asv
............\getmark.bmp
............\whitenoise.bmp
............\gaussian.bmp
利用噪声序列