Spatial-Perceptual Embedding with Robust Just Noticeable Difference Model for Color Image Watermarking

Mathematics

Yantong Zhan¹  Wenbo Wan¹  Kai Zhou¹  Yunming Zhang¹  Jing Li² 

[1] School of Information and Engineering, Shandong Normal University, Jinan 250014, China;School of Mechanical and Electrical Engineering, Shandong Management University, Jinan 250014, China;

关键词: perceptual embedding;    robust watermarking;    logarithmic transform;    just-noticeable difference;    cross domain;   

DOI  :  10.3390/math8091506

来源: DOAJ

【 摘 要 】

In the robust image watermarking framework, watermarks are usually embedded in the direct current (DC) coefficients in discrete cosine transform (DCT) domain, since the DC coefficients have a larger perceptual capacity than any alternating current (AC) coefficients. However, DC coefficients are also excluded from watermark embedding with the consideration of avoiding block artifacts in watermarked images. Studies on human vision suggest that perceptual characteristics can achieve better image fidelity. With this perspective, we propose a novel spatial–perceptual embedding for a color image watermarking algorithm that includes the robust just-noticeable difference (JND) guidance. The logarithmic transform function is used for quantization embedding. Meanwhile, an adaptive quantization step is modeled by incorporating the partial AC coefficients. The novelty and effectiveness of the proposed framework are supported by JND perceptual guidance for spatial pixels. Experiments validate that the proposed watermarking algorithm produces a significantly better performance.

【 授权许可】

Unknown