Codebook hardware implementation on FPGA for background subtraction
Journal of Real-Time Image Processing(2012)
Abstract
Object detection and tracking are main tasks in video surveillance systems. Extracting the background is an intensive task with high computational cost. This work proposes a hardware computing engine to perform background subtraction on low-cost field programmable gate arrays (FPGAs), focused on resource-limited environments. Our approach is based on the codebook algorithm and offers very low accuracy degradation. We have analyzed resource consumption and performance trade-offs in Spartan-3 FPGAs by Xilinx. In addition, an accuracy evaluation with standard benchmark sequences has been performed, obtaining better results than previous hardware approaches. The implementation is able to segment objects in sequences with resolution 768× 576 at 50 fps using a robust and accurate approach, and an estimated power consumption of 5.13 W.
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Key words
Field programmable gate arrays, Fixed-point arithmetic, Real-time image processing, Video surveillance
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