Method and apparatus for recognizing pattern of gray level image
US4941192A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1988 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Apr 19, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a method of recognizing a pattern of a gray level image the image to be processed is subjected to a normalization process, local gray level feature parameters are extracted from the normalized image at its sampling points, and the pattern is identified by using the extracted feature parameters in accordance with a predetermined recognition procedure. An apparatus for recognizing a pattern of a gray level includes a memory for storing a gray level image having several brightness tone levels, a normalization circuit for normalizing the brightness of the gray level image to be processed, an extraction circuit for extracting local gray level feature parameters from the obtained normality image at specific points, and a recognition circuit for identifying the pattern by using the feature parameters in accordance with a predetermined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.