tailieunhanh - báo cáo hóa học:" Research Article FPGA Accelerator for Wavelet-Based Automated Global Image Registration"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article FPGA Accelerator for Wavelet-Based Automated Global Image Registration | Hindawi Publishing Corporation EURASIP Journal on Embedded Systems Volume 2009 Article ID 162078 10 pages doi 2009 162078 Research Article FPGA Accelerator for Wavelet-Based Automated Global Image Registration Baofeng Li Yong Dou Haifang Zhou and Xingming Zhou National Laboratory for Parallel and Distributed Processing National University of Defense Technology Changsha 410073 China Correspondence should be addressed to Baofeng Li lbf@ Received 14 February 2009 Accepted 30 June 2009 Recommended by Bertrand Granado Wavelet-based automated global image registration WAGIR is fundamental for most remote sensing image processing algorithms and extremely computation-intensive. With more and more algorithms migrating from ground computing to onboard computing an efficient dedicated architecture of WAGIR is desired. In this paper a BWAGIR architecture is proposed based on a block resampling scheme. BWAGIR achieves a significant performance by pipelining computational logics parallelizing the resampling process and the calculation of correlation coefficient and parallel memory access. A proof-of-concept implementation with 1 BWAGIR processing unit of the architecture performs at least faster than the CL cluster system with 1 node and at least than the MPM massively parallel machine with 1 node. Further speedup can be achieved by parallelizing multiple BWAGIR units. The architecture with 5 units achieves a speedup of about 3X against the CL with 16 nodes and a comparative speed with the MPM with 30 nodes. More importantly the BWAGIR architecture can be deployed onboard economically. Copyright 2009 Baofeng Li et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction With the rapid innovations of remote sensing technology more and more remote sensing image processing .