Outline discrimination and processing
US5666439A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1994 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | May 25, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image processing method and apparatus extracts outline vectors from a binary image, by defining outline points at positions between white pixel area and black pixel area, closer to the black pixel area, to extract vectors representing the black pixel area smaller than the white pixel area. Outline vector patterns are defined in advance in consideration of the length and the direction of an object vector and the lengths and relative directions of preceding and subsequent vectors. Upon smoothing of the image, outline point after the smoothing are determined in accordance with an outline vector pattern that corresponds to the states of an object vector and its preceding and subsequent vectors in an outline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.