Automatic tone mapping method and image processing device
US8781225B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2012 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Jan 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20021
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A tone-mapping method for adjusting a contrast of an image includes generating a luminance histogram of the image according to a luminance and a sharpness of the image; performing histogram equalization on the luminance histogram, to generate a luminance mapping function corresponding to the image; performing a weighted operation on the luminance mapping function and a linear function, to generate a weighted luminance mapping function corresponding to the image; generating a tone-mapping look-up table corresponding to the image according to the weighted luminance mapping function; and adjusting the luminance of the image according to the tone-mapping look-up table, so as to adjust the contrast of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.