Apparatus and method to automatically distinguish between contamination and degradation of an article
US9508139B2 · kind B2 · utility
0Cited by
0References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2012 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Apr 13, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20221
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An inspection apparatus includes an imaging unit producing image signals; a processing unit for receiving the image signal; the imaging unit producing a stack of images of an article at different focal lengths in response to the processing unit; the processing unit generating a depth map from the stack of images; the processing unit analyzing the depth map to derive a depth profile of an object of interest; the processing unit determining a surface mean for the article from the stack of images; and the processing unit characterizing the article as degraded or contaminated in response to the depth profile and the surface mean.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.