Image compression
US9313367B2 · kind B2 · utility
0Cited by
3References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2007 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Sep 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/41
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for compressing a digital image to be printed, the image consisting of pixels. It is determined, for blocks of pixels, whether a block contains a graphical structure that is to be maintained without loss because it is of a type that can be accurately perceived by a human observer. The block is encoded losslessly into a less voluminous format, if such a graphical structure has been found. Otherwise, the block is compressed lossily, if no such graphical structure has been found.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.