Determining regions of interest in photographs and images
US7724959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2004 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Feb 11, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/25
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An algorithm for finding regions of interest (ROI) in images and photos based on an information driven approach in which sub-blocks of an image are analyzed for information content or compressibility based on the discrete cosine transform. The sub-blocks of low compressibility are grouped into ROIs using a morphological technique. Unlike other algorithms that are geared for highly specific types of ROI (e.g. face detection), the method of the present invention is generally applicable to arbitrary images and photos. A center-weighted variation of the algorithm can produce better results for certain photo applications. The algorithm can be used with several other image applications, including Stained-Glass collages and Pan-and-Scan presentations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.