Composite amplitude modulated phase only filter based detection and tracking of the back-reflection of KDP images

Abdul Ahad Sami Awwal; Wilbert A. McClay; Walter Ferguson; James V. Candy; Joseph T. Salmon; Paul J. Wegner

doi:10.1117/12.563650

4 November 2004 Composite amplitude-modulated phase-only filter-based detection and tracking of the back-reflection of KDP images

Abdul Ahad Sami Awwal, Wilbert A. McClay, Walter Ferguson, James V. Candy, Joseph T. Salmon, Paul J. Wegner

Author Affiliations +

Proceedings Volume 5556, Photonic Devices and Algorithms for Computing VI; (2004) https://doi.org/10.1117/12.563650
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

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Abdul Ahad Sami Awwal, Wilbert A. McClay, Walter Ferguson, James V. Candy, Joseph T. Salmon, and Paul J. Wegner "Composite amplitude-modulated phase-only filter-based detection and tracking of the back-reflection of KDP images", Proc. SPIE 5556, Photonic Devices and Algorithms for Computing VI, (4 November 2004); https://doi.org/10.1117/12.563650

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