Digital watermark-embedding apparatus, digital watermark-embedding method, and recording medium having recoded therein a program for performing the digital watermark-embedding method
US7187782B2 · kind B2 · utility
0Cited by
5References
10Claims
0Family size
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Key dates
| Filing date | Mar 20, 2003 |
| Grant date | Mar 6, 2007 |
| Priority date | — |
| Expiry date | Jul 12, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0061
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An input image is divided into local regions, each of which is formed by a macro block. An embedment intensity is determined for each of the local regions by using a calculated characteristic amount and a compression bit rate. Digital watermarks are embedded at the determined embedment intensity into the input image at each of the local regions thereof. The input image is encoded, thereby providing a compressed bit stream that has the digital watermarks embedded therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.