Progressive JPEG decoding
US6259820A · kind A · utility
7Cited by
4References
42Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1998 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Feb 25, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention enables progressively higher resolution images of a JPEG compressed image to be produced in a cost effective manner during the JPEG decompression process. The operation count is very low when images of 1/64th, 1/16th, and 1/4th of full resolution are to be produced without doing a full JPEG decompression. The low resolution images are useful for high speed search, and the ability to produce them without doing full decompression is an important factor in making such search practical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.