Method and device for watermark-based image integrity verification
US11915336B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | May 17, 2019 |
| Grant date | Feb 27, 2024 |
| Priority date | — |
| Expiry date | Jan 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/625
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a method of embedding a watermark on a Joint Photographic Experts Group (JPEG) image. The method includes: performing an entropy decoding on the JPEG image to generate quantized discrete cosine transform (DCT) coefficients; determining target bits in a bit plane of the quantized DCT coefficients on the basis of a watermark-embedding table (WET); and embedding a watermark based on metadata of the JPEG image in the target bits. Also, the present disclosure provides a method of verifying integrity of the image by using the embedded watermark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.