Abstract: A watermarking algorithm in contourlet domain is proposed.Firstly,the image is decomposed into several subbands.Secondly,according to the luminance and texture characteristics of the HVS,the watermark composed of a pseudorandom sequence is adaptively embedded into the subband with the largest energy.Finally,the inverse transform is performed to obtain the watermarked image.The blind detection is used,and the algorithm can achieve a good imperceptibility.Experimental results show that the algorithm has good robustness against attacks such as JPEG,noise and crop.