Projection aided feature measurement using uncalibrated camera

US8922647B2 · kind B2 · utility

Assignee

• The Boeing Company · US

Inventors

• Phillip John Crothers · Melbourne, AU
• Philip L. Freeman · Summerville, US
• Martin A. Szarski · Sydney, AU
• Justin G. Young · Melbourne, AU

Key dates

• Filing date: Aug 3, 2011
• Grant date: Dec 30, 2014
• Expiry date: Jun 12, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B21/045
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method of measuring a feature of an article may include projecting a scale template onto the article at a predetermined size. The method may additionally include projecting a measurement pattern onto the article. An image containing the feature, the scale template, and the measurement pattern may be recorded by the camera. The method may further include determining a scale factor of the image based on the scale template, and determining a size and/or a location of the feature based upon the measurement pattern and the image scale factor.