Apparatus for processing a digital image signal and methods for processing a digital image signal
US7649557B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2006 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Jan 3, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/646
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for processing a digital image signal includes a pseudo-luminance generator configured to generate pseudo-luminance signals from the image signal. An edge detector detects an edge in the image signal using a part of an interpolated image signal as a luminance signal for a line of the image signal including a pixel subjected to edge detection and using the pseudo-luminance signals for adjacent lines. A color suppressor suppresses pseudo-color present in the chrominance component of the image signal in response to a detected edge. A compensator may be provided to generate a second edge metric relative to the image signal to compensate for an edge detection error occurring in the edge detector. A color suppression coefficient calculator to generate a color suppression coefficient using a first edge metric generated by the edge detector and the second edge metric. Corresponding systems and methods are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.