Encoding image data with quantizing and inverse-quantizing pixel values
US9560364B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 25, 2015 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Feb 25, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/94
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing system and a method thereof is disclosed. A palette including an N number of index pixel values of a processing target image and corresponding index values is created. N is an integer equal to or smaller than 2. An image indexing process is performed on each processing target pixel. When a pixel value of the processing target pixel is a pixel value of one of the N number of index pixel values, a pixel data on a converted image corresponding to the processing target pixel is set as an index value on the palette corresponding to the pixel value of the processing target pixel. Otherwise, the pixel data on the converted image corresponding to the processing target pixel is set as an exceptional value, and the pixel value of the processing target pixel is stored in an exception buffer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.