Patent · US Active

Methods and arrangements for image processing

US8447103B2 · kind B2 · utility

2Cited by

0References

22Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Jim Rasmusson · Brösarp, SE
Tomas G. Akenine-Moller · Lund, SE
Per Wennersten · Kramfors, SE
Jakob Ström · Stockholm, SE

Key dates

Filing date	Dec 22, 2009
Grant date	May 21, 2013
Priority date	—
Expiry date	Dec 22, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/593
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The present invention relates to methods and arrangements for compressing images. The invention is based on the fact that edge blocks contain much information in one direction (across the edge), but very little information in the other direction (along the edge). By encoding edges explicitly, it is possible to obtain a high quality to a very low cost for many blocks. A block is encoded by first specifying the orientation of the edge in the block, and then specifying the profile across the edge using a function with a small number of parameters.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.