Binary image compression apparatus and method
US7355529B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2006 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Apr 26, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/94
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A binary image compression apparatus and method. The apparatus to compress a binary image includes a symbol extraction unit to extract symbols from a binary image, a symbol dictionary including a plurality of representative symbols registered therein and to register one or more of the extracted symbols when the one or more extracted symbols do not match the registered representative symbols, a symbol matching unit to perform a matching operation of the extracted symbols with the representative symbols using a plurality of thresholds to determine an index of the extracted symbols, and an encoding unit to compress symbols registered in the symbol dictionary and corresponding indexes, to compress indexes of the symbols extracted from the binary image and position information of each of the extracted symbols, and to generate a final bitstream from the compressed symbols, indexes, and position information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.