Method and apparatus for multi-resolution image searching
US5933546A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1996 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | May 6, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/2504
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multiresolution method and apparatus for searching of a database of images where the search is performed on compressed images, without first decompressing them. The method searches the database of compressed images first at a low resolution to obtain the relative quality of a match between a search template and a candidate image. If the match is below a particular threshold, the search is terminated without committing any further computational resources to the search. Conversely, if the match is above a particular threshold, the method enhances the resolution of the candidate image and then performs another match. As long as the relative quality of the match is above the particular threshold, the resolution of the candidate image is successively enhanced, until a match determination is made at a full resolution of the candidate image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.