Image signature creating method and apparatus for discriminating still images
US8379910B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2008 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Jan 16, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/583
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image signature creating method includes: creating a map by partitioning a still image using rings defined by concentric circles radially spaced apart from each other by a predetermined interval and radial lines circumferentially spaced apart from each other by a predetermined angle, the center of the still image being that of the concentric circles; and creating an image signature from the created map on the basis of distribution of pixels in regions defined by the rings and the radial lines. Accordingly, distribution of illegal contents is prevented and interrupted by search for and discrimination of a still image illegally deformed by a copying of or an intended attack on the still image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.