Field programmable gate array-based Haar classifier for accelerating face detection algorithm

The authors present a novel approach of using reconfigurable fabric to accelerate a face detection algorithm based on the Haar classifier. With highly pipelined architecture and utilising abundant parallel arithmetic units in FPGA, the authors have achieved real-time performance of face detection with very high detection rate and low false positives. The 1-classifier and 16-classifier realisations in an accelerator provide 10× and 72× speedups, respectively, over the software counterpart. Moreover, the authors', approach is scalable towards the resources available on FPGA and it will gain more momentum as the Geneseo Initiative is introduced in the market. This work also provides an understanding of using the reconfigurable fabric for accelerating non-systolic-based vision algorithms.