Method of classifying colors of color based image code
US7978911B2 · kind B2 · utility
6Cited by
4References
16Claims
0Family size
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Key dates
| Filing date | Jun 18, 2007 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Apr 10, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2019/06225
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided is a method of classifying colors of a color based image code. The colors of each cell forming the color based image code are classified by sampling a predetermined number of pixels from each cell and then applying a max channel based clustering method, a white balance based color clustering method, a single-linkage algorithm based color classification method, a K-means algorithm based color classification method, or the like. Accordingly, the colors of an image code can be accurately recognized despite of a color distortion due to characteristics of a camera, a printing medium, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.