Normalized image feature processing
US5719951A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1993 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Mar 4, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of processing an image including the steps of: locating within the image the position of at least one predetermined feature; extracting from the image data representing each feature; and calculating for each feature a feature vector representing the position of the image data of the feature in an N-dimensional space, such space being defined by a plurality of reference vectors each of which is an eigenvector of a training set of like features in which the image data of each feature is modified to normalize the shape of each feature thereby to reduce its deviation from a predetermined standard shape of the feature, which step is carried out before calculating the corresponding feature vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.