Method of processing image data on crack
US5046115A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1989 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Jun 22, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30256
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention is concerned with an automatic recognition of image data representative of crack derived from measurements of the road surface using a computor (4). An image memory in which data on the road surface are stored is divided into a plurality of regions and the region constituting a part of the divided regions for which a determination has been made such that crack (LP) is existent is utilized as a start point for a pursuing operation. A series of processings of pursuit and extraction such as extracting line segments (SG) corresponding to the crack (LP) from the start point region, making a determination on the direction of pursuing to be next effected on the basis of the line direction (.theta.) of the extracted line segments (SG), making a determination as to whether or not crack (LP) is existent in the adjacent divided regions situated in the direction of pursuing and performing a processing of extracting line segments (SG) only in the region for which a determination has been made such that crack (LP) is existent are repeatedly exeuted at every start point until pursuing is terminated. This permits data representative of the crack in the image memory to be extr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.