Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
453454 | Computer Standards & Interfaces | 2007 | 6 Pages |
Abstract
This paper presents a robust digital image watermarking scheme based on subsampling and difference correlation. Four subimages are obtained from the host image by subsampling. A binary watermark is bit-wisely embedded in the DCT domain of two of the subimages selected by a secret key. The watermark is detected using coefficient difference correlation and does not need the original image. Since the subimages are highly correlated with each other, the proposed difference correlation detector has a better performance than a common coefficient correlation detection. Experimental results show good robustness of the proposed scheme.
Related Topics
Physical Sciences and Engineering
Computer Science
Computer Networks and Communications
Authors
Wei Lu, Hongtao Lu, Fu-Lai Chung,