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Proceedings Paper

Hough transform based corner detection for laser beam positioning
Author(s): Abdul A. S. Awwal
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Paper Abstract

In laser beam alignment in addition to detecting position, one must also determine the rotation of the beam. This is essential when a commissioning new laser beam for National Ignition Facility located at the Lawrence Livermore National Laboratory. When the beam is square, the positions of the corners with respect to one another provides an estimate of the rotation of the beam. This work demonstrates corner detection in the presence or absence of a second order non-uniform illumination caused by a spatial mask. The Hough transform coupled with illumination dependent pre-processing is used to determine the corner points. We show examples from simulated and real NIF images.

Paper Details

Date Published: 15 September 2005
PDF: 11 pages
Proc. SPIE 5907, Photonic Devices and Algorithms for Computing VII, 59070I (15 September 2005); doi: 10.1117/12.621315
Show Author Affiliations
Abdul A. S. Awwal, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 5907:
Photonic Devices and Algorithms for Computing VII
Khan M. Iftekharuddin; Abdul A. S. Awwal, Editor(s)

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