Method and apparatus for locating the boundary of an object
US4538299A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1983 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Feb 28, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for automatically locating the boundary of an object in a field of view has a raster scan device to generate an electrical image of the field of view. The electrical image is segmented and digitized to form a first representation. The image is then processed by comparing the digitized signal to a pre-set threshold to form a second representation. A converter combines each value of the pixel of the second representation with the values of the adjacent pixels into a single value and stores it in a corresponding location in a third representation. The values of the pixels in the third representation are read out and compared to a look-up table. A chain code of the boundary of the particle is formed from the look-up table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.