Method and apparatus for performing tone conversion
US5729636A · kind A · utility
21Cited by
12References
102Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1996 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Jun 24, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/67
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing method and apparatus for performing tone conversion on input image data X to produce converted data Y set a functional formula including at least two of a first-order term of the input image data X, a third-order term of the input image data X, and a fraction term of the input image data X. Alternatively, the function formula includes at least two of a second-order term of the input image data X, a third-order term of the input image data X, and a fraction term of the input image data X. Then, the converted data Y is output in accordance with the functional formula.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.