Method and apparatus for image processing capable of efficiently performing a gamma conversion operation
US6404512B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1999 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/202
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing method and apparatus including a memory, parameter registers, and a gamma conversion processor. The memory stores at least one gamma conversion algorithm and a plurality of parameter sets corresponding to predefined gray-scale ranges. The gamma conversion processor selects a suitable parameter set from among the plurality of parameter sets according to a required output gray-scale range and transfers the selected suitable parameter set from the memory to the parameter registers sequentially. Then, the gamma conversion processor performs at a time in parallel a gamma conversion operation with respect to input gray-scale values of successive pixels of an input image data stream using the gamma conversion algorithm and the selected suitable parameter set, and generates a serial output gray-scale signal based on a result of the gamma conversion operation and the data stored in the parameter registers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.