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Proceedings Paper

Fourier plane and optical processing for sub-pixel image registration
Author(s): Thomas J. Grycewicz; Brian E. Evans; Christopher J. Florio; Theresa M. Christian
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Paper Abstract

Accurate registration of image pairs is critical to a number of image processing tasks, including image splicing, change detection, image co-addition, and super-resolution processing. We have applied digital Fourier plane correlation and optical joint-transform correlation to image registration. We demonstrated RMS registration accuracy of 0.09 pixels for a digital system and 0.1 pixels for an optical system. The experimental system uses an electrically addressed spatial light modulator (SLM) at the input plane of a joint transform correlator and an optically addressed SLM at the Fourier plane. We operate our optical system in burst mode at the rate of 50 correlations per second. The paper describes digital and experimental implementations of the image registration system. We discuss preprocessing algorithms used to prepare inputs for correlation, post-processing algorithms to interpolate the output, and the effect of these processing variations on system performance.

Paper Details

Date Published: 30 August 2006
PDF: 8 pages
Proc. SPIE 6311, Optical Information Systems IV, 631117 (30 August 2006); doi: 10.1117/12.692687
Show Author Affiliations
Thomas J. Grycewicz, The Aerospace Corp. (United States)
Brian E. Evans, The Aerospace Corp. (United States)
Christopher J. Florio, The Aerospace Corp. (United States)
Theresa M. Christian, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 6311:
Optical Information Systems IV
Bahram Javidi; Demetri Psaltis; H. John Caulfield, Editor(s)

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