Method and apparatus for enhancing a digital image by applying an inverse histogram-based pixel mapping function to pixels of the digital image
US7289667B2 · kind B2 · utility
9Cited by
11References
66Claims
0Family size
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Key dates
| Filing date | Oct 4, 2004 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Jan 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/75
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and associated device wherein an inverse histogram based pixel mapping step is combined with an edge enhancement step such as unsharp masking. In such an arrangement the inverse histogram based pixel mapping step improves the performance of the unsharp masking step, serving to minimize the enhancement of noise components while desired signal components are sharpened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.