Backlight scene judging method
US7010160B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1999 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Jun 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/71
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an image processing apparatus processing digitized image data taken by a digital camera, or the like, an image focused on an image pickup device is divided into a plurality of rectangular regions. A value of the lightness with respect to each rectangular region and a distribution of the color saturation are calculated by using image data. The scene of the image is judged whether it is backlighted or not by using a number of the rectangular regions having the value of the lightness equal to or larger than a threshold value. When the scene is judged as the backlight scene, it is further judged whether it is actually backlighted or not by using the distribution of the color saturation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.