Apparatus for tracing contours of segmented regions
US5757382A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1995 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Dec 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for tracing contours of segmented regions in an image includes a zero masking unit to produce a closed contour loop for each of the segmented regions, a tracing circuit for sequentially assigning each of the non-zero masked pixels on the closed contour loop as a tracing pixel, comparing the tracing pixel with a set of its adjacent pixels located at a rightward, an upward, a leftward and a downward directions with respect to the tracing pixel to select one of the adjacent pixels having a luminance level identical to that of the tracing pixel and updating the tracing pixel with the selected adjacent pixel with until the updated tracing pixel coincides with the tracing pixel selected first.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.