Hough Transform Based Corner Detection for Laser Beam Positioning

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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 ... continued below

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PDF-file: 13 pages; size: 0.3 Mbytes

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Awwal, A S July 26, 2005.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 30 times . More information about this article can be viewed below.

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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.

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PDF-file: 13 pages; size: 0.3 Mbytes

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  • Presented at: SPIE - Optics and Photonics 2005, San Diego, CA, United States, Jul 31 - Aug 04, 2005

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  • Report No.: UCRL-CONF-214168
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 878624
  • Archival Resource Key: ark:/67531/metadc878598

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Office of Scientific & Technical Information Technical Reports

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  • July 26, 2005

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 5, 2016, 7:45 p.m.

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Awwal, A S. Hough Transform Based Corner Detection for Laser Beam Positioning, article, July 26, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc878598/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.