23 November 2009 Application of CMOS image sensor OV9620 in number recognition system
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An image acquisition system is introduced, which consists of a color CMOS image sensor (OV9620), SRAM (CY62148), CPLD (EPM7128AE) and DSP (TMS320VC5509A). The CPLD implements the logic and timing control to the system. SRAM stores the image data, and DSP controls the image acquisition system through the SCCB (Omni Vision Serial Camera Control Bus). The timing sequence of the CMOS image sensor OV9620 is analyzed. The imaging part and the high speed image data memory unit are designed. The system structure and its application of CMOS image sensor OV9620 in paper currency number recognition are also introduced. The hardware and software design of the image acquisition and recognition system is given. In this system, we use the template matching character recognition method to guarantee fast recognition speed and high correct recognition probability.
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Yu-feng Li, Yu-feng Li, Fei Liang, Fei Liang, } "Application of CMOS image sensor OV9620 in number recognition system", Proc. SPIE 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 75080T (23 November 2009); doi: 10.1117/12.837571; https://doi.org/10.1117/12.837571

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