Image processing device and image processing method for selecting regions based on gradiation for embedding a watermark
US10970804B2 · kind B2 · utility
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Key dates
| Filing date | Jan 27, 2016 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | May 10, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20072
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Certainty of detecting a watermark embedded in a color image is increased. Image data acquisition means of an image processing device acquires image data. Histogram generation means generates, based on pixel values of an image indicated by the image data acquired by the image data acquisition means, a histogram for each region in the image. Region selection means selects tom the image a region having a sparse color distribution in the histogram generated by the histogram generation means. Image processing means embeds a watermark in the region selected by the region selection means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.