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Proceedings Paper

Composite amplitude-modulated phase-only filter-based detection and tracking of the back-reflection of KDP images
Author(s): Abdul Ahad Sami Awwal; Wilbert A. McClay; Walter Ferguson; James V. Candy; Joseph T. Salmon; Paul J. Wegner
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Paper Abstract

An algorithm for determining the position of the KDP back-reflection image was developed. It was compared to a centroid-based algorithm. While the algorithm based on centroiding exhibited a radial standard deviation of 9 pixels, the newly proposed algorithm based on classical matched filtering (CMF) and a Gaussian fit to correlation peak provided a radial standard deviation of less than 1 pixel. The speed of the peak detection was improved from an average of 5.5 seconds for Gaussian fit to 0.022 seconds by using a polynomial fit. The performance was enhanced even further by utilizing a composite amplitude modulated phase only filter; producing a radial standard deviation of 0.27 pixels. The proposed technique was evaluated on 900+ images with varying degrees of noise and image amplitude as well as real National Ignition Facility (NIF) images.

Paper Details

Date Published: 4 November 2004
PDF: 11 pages
Proc. SPIE 5556, Photonic Devices and Algorithms for Computing VI, (4 November 2004); doi: 10.1117/12.563650
Show Author Affiliations
Abdul Ahad Sami Awwal, Lawrence Livermore National Lab. (United States)
Wilbert A. McClay, Lawrence Livermore National Lab. (United States)
Walter Ferguson, Lawrence Livermore National Lab. (United States)
James V. Candy, Lawrence Livermore National Lab. (United States)
Joseph T. Salmon, Lawrence Livermore National Lab. (United States)
Paul J. Wegner, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 5556:
Photonic Devices and Algorithms for Computing VI
Khan M. Iftekharuddin; Abdul Ahad S. Awwal, Editor(s)

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