Methods for enhancing image contrast and related image processing systems thereof
US11120532B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Feb 13, 2020 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Feb 27, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20072
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image processing method and corresponding system operate by obtaining a first image and generating a first histogram information based on the first image. The method then obtains a cumulative-distribution-function (CDF) curve according to the first histogram information and generates an adaptive curve according to a high-contrast curve and a low-contrast curve. Finally, the method uses the adaptive curve to adjust the CDF curve to generate a mapping curve, and adjusts the first image by using the mapping curve to generate a second image with contrast enhancement effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.