A. Wijayasiri, Tania Banerjee-Mishra, S. Ranka, S. Sahni, M. Schmalz
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Dynamic data driven image reconstruction using multiple GPUs
The reconstruction of nxn-pixel Synthetic Aperture Radar imagery using Back Projection algorithm incurs O(n2·m) cost, where m is the number of pulses. This paper presents dynamic data driven multiresolution algorithms to speed up SAR backprojection on multiple GPUs. A critical part of this spatially variant reconstruction process is load balancing, which circumvents asymmetric work assignment. Our algorithms achieve 15 TFLOPS using 128 GPUs.
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