Scrambling of image by randomizing pixel values
US7293172B2 · kind B2 · utility
9Cited by
0References
32Claims
0Family size
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Key dates
| Filing date | Jan 22, 2004 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | Jan 27, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8358
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for coding an image while scrambling the image by randomizing pixel values includes a scrambling unit which scrambles an image by utilizing an encryption function to compute a displacement of a pixel value to be randomized in response to a displacement of a previously randomized pixel value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.