Method, system and computer program product for providing entropy constrained color splitting for palette images with color-wise splitting
US8000547B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2006 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Aug 5, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/96
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method, system and computer program product for progressively encoding a digitized color image with M distinct colors by assigning each of the M distinct colors to an associated subset of pixels in the image, is provided. This involves: (a) initializing a tree structure with at least one starting leaf node comprising a subset of the M distinct colors; (b) determining at least one representative color for each starting leaf node; and (c) growing the tree structure by (i) selecting a leaf node n to become a non-leaf node based on the combined distortion and entropy rate resulting from turning the leaf node into the non-leaf node; (ii) allocating each color in leaf node n to one of the two new leaf nodes; (iii) determining a representative color for each new leaf node; and (iv) encoding the resulting index information, representative color information, and pixel information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.