Method and apparatus for detecting and thinning a contour image of objects
US5650828A · kind A · utility
35Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1995 |
| Grant date | Jul 22, 1997 |
| Priority date | — |
| Expiry date | Aug 23, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for detecting and thinning a contour image of an object in a video frame comprises the steps of: (a) calculating edge magnitudes for pixels in the video frame and detecting edge points, (b) generating a contour image constituted by the detected edge points, and (c) thinning the contour image by comparing an edge magnitude for each of the edge points with each of the edge magnitudes included in a plurality of edge magnitude sets, each of the edge magnitude sets having a series of three edge magnitudes selected from the edge magnitudes corresponding to the neighboring pixels surrounding said each of the edge points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.