DEVELOPMENT AND IMPLEMENTATION OF A FAST FACTORIZED BACK-PROJECTION CODE TO SPEED UP IMAGE RECONSTRUCTION FOR SYNTHETIC APERTURE RADAR
Synthetic Aperture Radar
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Publisher:The Ohio State University
Series/Report no.:The Ohio State University. Department of Electrical and Computer Engineering Honors Theses; 2011
Back-projection is a widely used imaging technique used in medical imaging, as well as in synthetic aperture radar (SAR). Conventional back-projection is an extremely time consuming process, with the computational time being proportional to O(N^3), if the reconstructed image is of size N*N. Fast Factorized Back-Projection (FFBP) is an alternate process that significantly reduces the computational time, which is proportional to O(N^2*log(N)) in this case. This is achieved by dividing the reconstruction into multiple steps, which leads to a decrease in total computational time.
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