CMOS图像传感器OV7620在点钞机人民币号码识别记录系统中的应用

在点钞机人民币号码识别记录系统中应用图像传感器OV7620实现号码图像的在线采集。通过DSP(数字信号处理器)的HPI(主机接口)编程实现SCCB(串行摄像机控制总线)总线协议,完成对OV7620的初始化;系统通过多电压供电使OV7620初始化后在DSP的控制下实时的将目标数字图像数据直接保存到系统指定的数据存储位置。目前OV7620可以30frame/s的速度为系统提供200*40大小、清晰、完整的号码图像数据。由于目前点钞机的运行速度为15~20 piece/s,用OV7620完全能够在点钞机正常运行过程中实现对人民币号码的在线采集。

Application of CMOS Digital Camera OV7620 in RMB Number Recognition and Recordation System of Cash-Counting Machine

The digital camera OV7620 is applied to complete the on-line collection of number image.The SCCB(the OmniVision Serial Camera Control Bus)is simulated through the HPI(Host-Port Interface) of DSP(Digital Signal Processors),in order to initialize the OV7620;DSP controls the digital image data to be stored in the specifically location directly after the initialization results from the multi-power supply of the system.Nowadays,OV7620 can supply the legible,integrated number image data,which is 200*40,for system at 30 frames per second.For the rate of cash-counting machine is 15~20 frames per second,OV7620 can gather the RMB number image on-line,while the cash-counting machine is working normally.