Image processing method and apparatus
US5875039A · kind A · utility
23Cited by
4References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1996 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Dec 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
When image data coded by a DCT coding method in a predetermined block size is to be decoded, an image processing apparatus extracts necessary DCT coefficients of a block on the basis of an enlargement/reduction ratio determined in advance, then decodes the extracted DCT coefficients. Thereby it is possible to produce a reduced image at high speed without using a memory of high capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.