Enhancing the legibility of images using monochromatic light sources
US9525802B2 · kind B2 · utility
1Cited by
16References
19Claims
0Family size
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Key dates
| Filing date | Jan 19, 2016 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Jan 19, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method are described for enhancing readability of document images by operating on each document individually. Monochromatic light sources operating at different wavelengths of light can be used to obtain greyscale images. The greyscale images can then be used in any desired image enhancement algorithm. In one example algorithm, an automated method removes image background noise and improves sharpness of the scripts and characters using edge detection and local color contrast computation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.