Image processing method and apparatus
US7742190B2 · kind B2 · utility
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Key dates
| Filing date | Nov 15, 2004 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Dec 26, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0428
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image processing method includes the steps of detecting a dynamic range of input image data, performing resolution conversion processing to increase the number of grayscale levels of the input image data, and performing dithering processing to reduce the number of grayscale levels of each pixel of the input image data. The number of pseudo grayscale levels in the dithering processing is determined, based on a parameter indicating the level of the dynamic range and a parameter concerning the resolution conversion processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.