A FPGA-based image recognition system is designed for colorimetric sensor array in order to recognize a wide range of volatile organic compounds.The gas molecule is detected by the responsive sensor array and the responsive image is obtained.The image is decomposed to RGB color components using CMOS image sensor.An embedded image recognition architecture based on Xilinx Spartan-3 FPGA is designed to implement the algorithms of image recognition.The algorithm of color coherence vector is discussed in detail [X1] compared with the algorithm of color histograms,and experimental results demonstrate that both of the two algorithms could be analyzed effectively to represent different volatile organic compounds according to their different responsive images in this system.
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