Image processing method and apparatus, and storage medium
US6792153B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2000 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Oct 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Compressed image data is input, and it is checked according to the attributes of that image if the compression ratio of the compressed image is to be changed by a compression ratio determination unit. A compression ratio change unit changes the compression ratio of the compressed image to increase by deleting a high-frequency subband or lower bit plane of the compressed image data. Upon changing the compression ratio, codes of a non-region-of-interest of that image data are deleted, and if a desired compression ratio cannot be obtained by only such deletion, codes of a region of interest of that data are deleted to change the compression ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.