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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Sherry, P. Savakis, A. |
| Copyright Year | 2004 |
| Description | Author affiliation: Dept. of Comput. Eng., Rochester Inst. of Technol., USA (Sherry, P.; Savakis, A.) |
| Abstract | Watermarking schemes that have been developed for continuous tone images cannot be directly applied to halftone images. Many of these watermarking methods require characteristics implicit in continuous tone images but absent from halftones. With this in mind, it seems reasonable to have a robust watermarking technique specific to halftones, equipped to work in the binary image domain. The paper reviews existing techniques and suggests improvements to increase their performance and overcome their limitations. The first set of post-halftone watermarking methods work on existing halftones. Data hiding cell parity (DHCP) works in the parity domain instead of on individual pixels. Data hiding mask toggling (DHMT) works by encoding two bits in the 2/spl times/2 neighborhood of a pseudorandom location. Dispersed pseudorandom generator (DPRG), on the other hand, is a preprocessing method that takes place before halftoning. DPRG achieves better visual results. Using the modified peak signal-to-noise ratio (MPSNR) metric, the proposed techniques outperform existing methods by up to 5-15%, depending on the image type and method considered. |
| File Size | 292889 |
| File Format | |
| ISBN | 0780384849 |
| ISSN | 15206149 |
| DOI | 10.1109/ICASSP.2004.1327283 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-05-17 |
| Publisher Place | Canada |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Watermarking Data encapsulation Decoding Authentication Noise robustness Encoding Image coding PSNR Image processing Underwater tracking |
| Content Type | Text |
| Resource Type | Article |
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