A reconfigurable VLSI coprocessing system for the block matchingalgorithm

Several VLSI architectures for the full-search block matching algorithm have been proposed in recent years due to its computation and I/O-intensive nature and its importance in various computer vision and image processing applications. This paper presents a new coarse grained reconfigurable coprocessor which is suitable for integration with general purpose microprocessors. The 180000 transistor custom VLSI design was implemented in 0.6 μm CMOS on a 4.12 min×2.59 mm die and has been fully tested up to 33 MHz. For a typical image database search application, a sample system consisting of four coprocessors interfaced through a 33 MHz PCI bus will provide a speedup of 320× over an 80486 DX2/66 MHz and 64× over a 150-MHz Pentium running fully optimized assembly code