Compression of images using object maps
US7146058B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2003 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Aug 1, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/64
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Various systems, methods, and programs embodied in computer readable mediums are provided for compression of a page frame that includes a number of pixels. In one embodiment, an object map is generated that includes a number of values, each of the values being associated with a corresponding one of the pixels in the page frame. Also, a compressed image file is generated of the page frame that is associated with the object map. Each of the values in the object map indicates whether a blank color conversion or one of a number of predefined color conversions is to be performed during a reconstruction of a corresponding one of the pixels, wherein each of the predefined color conversions includes a corresponding degree of gray component replacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.