Specific color detection applicator
US8358836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2010 |
| Grant date | Jan 22, 2013 |
| Priority date | — |
| Expiry date | Jul 29, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/843
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A specific color detection circuit shows an RGB input pixel and an RGB color signal to be detected in a three-dimensional coordinate, calculates a first distance from an origin to a foot of a perpendicular drawn from the coordinate of the RGB input pixel to a straight line connecting the origin and the coordinate of the RGB color signal or a coordinate with the same RGB ratio as the signal and a second distance from the coordinate of the input pixel to the foot, and detects a hue of a signal of the input pixel. The circuit generates a detection region in a color-difference direction according to the first distance and the hue, calculates a third distance based on the first distance for the detection region and judges the input pixel as being in a predetermined color detection region when the third distance is longer than the second distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.