Abstract
In this paper, a copyright protection scheme based on visual cryptography and discrete cosine transform for colour images is proposed. Note that the watermark emphasized here is a colour watermark. Instead of hiding a watermark in a colour image for identifying the ownership of the image, all that is required is to construct an ownership share according to a master share created from the colour image by applying discrete cosine transform plus a watermark used for copyright certification. By stacking the master share and the ownership share together, the watermark for ownership identification can be revealed through the utilization of visual cryptography plus a little additional computation. Additionally, the present scheme is also extremely suitable for multiple watermarking. The security of this scheme can be guaranteed via a pseudo random mechanism and the feature of visual cryptography. With substantial experimental results, the robustness of this scheme can be demonstrated against various image processing attacks.
Original language | English |
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Pages (from-to) | 133-140 |
Number of pages | 8 |
Journal | Imaging Science Journal |
Volume | 50 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2002 Jan 1 |
All Science Journal Classification (ASJC) codes
- Media Technology
- Computer Vision and Pattern Recognition