Method of detecting flaws in the structure of a surface

US7149337B2 · kind B2 · utility

Assignee

• INB Vision AG · DE

Inventors

• Bernd Michaelis · Magdeburg, DE
• Peter Albrecht · Hamburg, DE
• Tilo Lilienblum · Magdeburg, DE

Key dates

• Filing date: Nov 21, 2001
• Grant date: Dec 12, 2006
• Expiry date: Dec 22, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T7/521
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method of detecting flaws in the surface of a test object relative to the surface of a flawless master part by constructing in an artificial neuronal net a virtual master part for comparison with characteristic numbers derived from the grey values of sequential images of the test object recorded by a digital camera.