A Research of Multi-function Watermark Based on Correct-encode in Spatial Frequency Domain
HE Zhang-ju · Journal of Hangzhou Dianzi University · 2012
In this paper,a watermark algorithm of multi-function watermark based on Hamming code in spatial frequency domain is proposed.Decomposed the original digital image into DWT,and embedded robust watermark into the diagonal-frequency of the low-frequency;then the bit plane of image and robust watermark was picked up to generate correct code,and embedded the correct-encode into the LSB of image.Experimental results show that the robust watermark possesses good robustness to common attacks,the fragile watermark has a good sensibility,and it can detect and recover the tampered areas effectively.