Method of compressing image data
US11146787B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2019 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Jan 29, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/182
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of compressing image data that comprise a plurality of pixel values that are associated with a respective pixel is described, wherein the pixel values are compressed for at least some pixels in accordance with the following steps: associating the respective pixel with one of a plurality of pixel groups in accordance with a predetermined grouping scheme, with each of the plurality of pixel groups being defined by the pixels of a plurality of predetermined pixel alignments or by a subset of pixels of a plurality of predetermined pixel alignments; determining an estimated pixel value of the respective pixel in dependence on the pixel value of at least one predetermined other pixel while using at least one estimation rule, with the at least one predetermined other pixel being selected in dependence on the pixel group of the respective pixel; forming a difference value of the respective pixel that corresponds to a predetermined relation between the pixel value and the estimated pixel value of the respective pixel; and encoding the difference value using an encoding method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.