Image edge finder which operates over multiple picture element ranges
US5420971A · kind A · utility
47Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1994 |
| Grant date | May 30, 1995 |
| Priority date | — |
| Expiry date | Mar 15, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/13
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An edge finder for an image processing system locates edges in a digitized image over several different ranges of pixel values and assigns, to each pixel value an edge characteristic value which represents a minimum edge value for the pixel in the image. The exemplary edge finder that is able to resolve transitions occurring between two pixels or over groups of four or eight pixels to determine whether an edge should be defined between the original two pixels. The edge finder simultaneously examines four edges in two dimensions to determine the edgeness value for each pixel in the digitized image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.