In order to improve the invisibility and robustness of watermark

a new improved image watermarking algorithm based on DWT and SVD was presented.Firstly wavelet transform was adopted on the carrier

then did singular value decomposition after unblocking

embed watermark on chosen data according to the theory of self-adaptive.It was a blind watermarking algorithm.The result of experiments showed that this algorithm enhanced the watermarking robustness and improved the precision.At last

compared with the separat...