Contrast enhancement and reduction of noise in images from cameras
US11107202B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2020 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Feb 3, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The subject matter of this specification can be implemented in, among other things, a method including identifying one or more blocks in an electronic image that depicts text characters. The method includes identifying one or more text blocks among the blocks that depict the text characters. The method includes identifying a text contrast value for each of the text blocks. The method includes identifying a type for each pixel in each of the text blocks based on the text contrast value. The method includes determining, for each pixel in each of the text blocks, a brightness for the pixel based on the identified type. The method includes storing, in at least one memory, the electronic image including the determined brightness for each pixel in each of the text blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.