Three-dimensional dynamic range reduction techniques

Kevin G. Harding; Xiaoping Qian

doi:10.1117/12.517489

26 February 2004 Three-dimensional dynamic range reduction techniques

Kevin G. Harding, Xiaoping Qian

Proceedings Volume 5265, Two- and Three-Dimensional Vision Systems for Inspection, Control, and Metrology; (2004) https://doi.org/10.1117/12.517489
Event: Photonics Technologies for Robotics, Automation, and Manufacturing, 2003, Providence, RI, United States

Abstract

A significant limitation of the application of 3D structured light systems has been the large dynamic range of reflectivity of typical parts such as machined parts. The advent of digital cameras have helped this problem to some extent by providing a larger dynamic range of detection, but often parts must still be coated with white paint or powder to get a good enough return for 3D measurement techniques such as structured light. This paper will present an overview of methods that have been used to minimize the range of light reflections from many parts including polarization, multiple exposure, multiple viewing and masking techniques. Also presented will be methods of analysis such as phase analysis techniques which can provide improved robustness. Finally, we will discuss the pros and cons of these options as applied to the application of 3D structured light techniques to machined metal parts.

Citation Download Citation

Kevin G. Harding and Xiaoping Qian "Three-dimensional dynamic range reduction techniques", Proc. SPIE 5265, Two- and Three-Dimensional Vision Systems for Inspection, Control, and Metrology, (26 February 2004); https://doi.org/10.1117/12.517489

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