Digital image display improvement system and method
US6782137B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1999 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Nov 24, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique is disclosed for enhancing discrete pixel images in accordance with a desired dynamic range, such as the dynamic range of a softcopy display. Adaptive equalization is first performed on the image data to reduce overall differences between high and low intensity values, while maintaining the overall appearance of light and dark regions of the reconstructed image. Adaptive contrast boosting or enhancement is then performed on the equalized values to bring out details visible by virtue of the enhanced local contrast. The contrast enhancement may include non-linear mapping of a mid-frequency boosted image onto the dynamic range of the softcopy display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.