Many digital watermarking schemes have been proposed for copyright protection recently due to the rapid growth of multimedia data distribution. Robustness is one of the crucial important issues in watermarking. But, most of traditional digital watermarking schemes is normally not to resist both geometric distortion and signal processing attacks well.
There are two different types of solutions to resisting geometrical attacks: nonblind and blind methods. With the noblind approach, due to availability of the original image, the problem can be resolved with a good solution by elective search between the geometrically attacked and unattacked image. The blind solution, which does not use the original image in watermark extraction, is obviously more challenging.
In this research, we propose a blind watermarking scheme which based on histogram property. So that, we propose a novel scheme to define the lattice structure of color space of host image for embedding watermark data. We utilize the histograms of various properties that calculated from the host image, and partition each histogram space into several divisions with dynamic interval. The number of pixels of each division is equal. And then we embed watermark data by modifying distribution of each division.
The experimented results present the algorithm is robust to resist common geometric attacks and high quality JPEG compression at the same time.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0621104-152526 |
| Date | 21 June 2004 |
| Creators | Su, Hung |
| Contributors | Lih-Shyang Chen, Wen-Shyong Hsieh, Yau-Hwang Kuo, L. J. Wang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0621104-152526 |
| Rights | not_available, Copyright information available at source archive |
Page generated in 0.1089 seconds