Method and apparatus for processing an image in an image compression/decompression system that uses hierachical coding
US6633677B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1999 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Dec 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A component of an image processor receives at least a portion of one or more reconstructed versions of an image including a causal context of an object pixel of the image, and provides a prediction for the object pixel computed as a weighted sum according to at least one measure of correlation and a weighting policy. A component receives a first prediction of an object pixel and reconstructed versions of an image, and provides a second prediction for the object pixel in accordance with the first prediction for the object pixel and a substantially mean error for the context. A component receives one or more prediction differences versions of the image including a causal context prediction difference of an object prediction difference of the image, and provides a prediction for the object prediction difference computed as a weighted sum according to at least one measure of correlation and a weighting policy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.