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Implementation and Applications of Tri-State Self-Organizing Maps on FPGA

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4 Author(s)
Appiah, K. ; Lincoln Sch. of Comput. Sci., Univ. of Lincoln, Lincoln, UK ; Hunter, A. ; Dickinson, P. ; Hongying Meng

This paper introduces a tri-state logic self-organizing map (bSOM) designed and implemented on a field programmable gate array (FPGA) chip. The bSOM takes binary inputs and maintains tri-state weights. A novel training rule is presented. The bSOM is well suited to FPGA implementation, trains quicker than the original self-organizing map (SOM), and can be used in clustering and classification problems with binary input data. Two practical applications, character recognition and appearance-based object identification, are used to illustrate the performance of the implementation. The appearance-based object identification forms part of an end-to-end surveillance system implemented wholly on FPGA. In both applications, binary signatures extracted from the objects are processed by the bSOM. The system performance is compared with a traditional SOM with real-valued weights and a strictly binary weighted SOM.

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Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:22 ,  Issue: 8 )