JPEG encoding for document images using pixel classification
US7302107B2 · kind B2 · utility
4Cited by
24References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2003 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Feb 26, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a system and method for JPEG encoding an image that includes variable quantization for each block, depending upon the classification of each block, which is dependent on the classification of pixels in that block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.