Method and apparatus for converting a color image to grayscale
US8594419B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2009 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Nov 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/134
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for converting a color digital image into a grayscale digital image is disclosed. First, each green intensity value in the color digital image is copied into a corresponding pixel location of the grayscale digital image. Then for each red intensity value in the color digital image, the red intensity value is adjusted to match a local dynamic range of green intensity values. The adjusted red intensity value is inserted into the corresponding pixel location of the grayscale digital image. Then for each blue intensity value in the color image, the blue intensity value is adjusted to match a local dynamic range of green intensity values. The adjusted blue intensity value is inserted into the corresponding pixel location of the grayscale digital image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.