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We describe the implementation of a vision algorithm based on matched filtering on an FPGA. Detection of a reference image in an input image must be performed in real-time and robustly against occlusion and change of illumination. Vision algorithm based on matched filtering can perform the detection robustly but requires much computation time since it includes 2D FFT/IFFT and polar transform. In this article, we implement the algorithm on an FPGA so that the detection is performed in real-time and robustly.