A novel watermarking algorithm based on quantization and relationship in singular value decomposition domain is proposed.Firstly

cover image is subdivided to non -overlapping blocks of size 8×8.Secondly

perform 1-level discrete wavelet transform for each selected blocks

and do singular value decomposition on the low and high frequency sub -band

respectively.Finally

the biggest singular value of low and high frequency sub -band are modified by exploiting quantification and relationship method to embed preprocessed watermarking image

respectively. Experimental results show that the proposed algorithm has good transparency and robustness. Compared with other algorithms

it has better performance for most attacks.