Method and system for detecting a body in a zone located proximate an interface
US7583196B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2004 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | May 13, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/082
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention concerns a method and a system for detecting a body (801) in a zone (802) located proximate an interface (803). The body is illuminated by an electromagnetic radiation (804) comprising at least two different wavelengths, located in ranges corresponding to near infrared and to green-blue. The method comprises the following steps: selecting two wavelengths; providing, for each of said wavelengths, an image (805) of the interface and of the zone; extracting from said data of each image two sets of data (807) respectively representing at least one part of the body in the near infrared range and in the green-blue range; comparing said data sets (807). It is thus possible to detect the presence of a body by discriminating between a body entirely located beneath the interface and a body located at least partly above the interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.