关键词: 彩色图像水印, 离散余弦变换, 人类视觉系统, 关系

Abstract:

A novel watermarking technique based on human visual system (HVS) and relationship is proposed in the discrete cosine transform (DCT) domain. Firstly, the binary watermarking image is processed by chaotic encryption and Arnold scrambling. Secondly, each component of the original color image is subdivided into blocks of size 8×8 and is performed by DCT transform. Finally, according to the brightness and texture masking features of each sub-block and the watermarking pixel values, the relationship of the selected DCT coefficients is adaptively adjusted to embed the watermarking. Experiments show that the proposed algorithm has good transparency and the ability to resist a variety of attacks and the embedded watermarking in red component is more robust against compression and additive noise et al. than the embedded watermarking in the blue or green component. Compared with similar algorithms, the proposed algorithm has better performance.

Key words: color image watermarking;discrete cosine transform;human visual system;relationship