关键词: 数字水印, 多小波变换, 人眼视觉系统, Baker变换

Abstract: In this paper，an adaptive watermarking algorithm based on the discrete multiwavelet transform and the human visual perception characteristics is proposed．In this algorithm，the Bakers’ transformation is used to encrypt watermark image and utilizes the visual masking in multiwavelet domain to embed the encrypted watermark in different image parts with different intensity.Experimental results show that the algorithm can improve the robust of watermarking and keep it invisible and stand against several attacks，such as filtering，scaling，cropping image，rotation and JPEG compression，also can be helpful to protect the copyright of digital images.

Key words: digital watermark, multiwavelet transform, HVS, Baker transformation