介绍一种基于单片机信号处理的自动聚焦系统。通过对CMOS图像传感器输出的视频信号 进行模拟滤波,单片机采样、分析、控制马达转动镜头至对焦清楚的位置。该系统具有功耗低、小型轻便、聚焦快等特点,可以应用于许多信息家电和一般工业控制场合。对系统关键技术进行了分析讨论,并给出了实验结果。 An automatic focusing system based on single-chip signal processing is introduced. Through the CMOS image sensor output of the analog video signal filtering, single-chip sampling, analysis, control the motor to rotate the lens to a clear focus position. The system has the advantages of low power consumption, small size and light weight, fast focusing and the like, and can be applied to many information appliances and general industrial control applications. The key technologies of the system are analyzed and discussed, and the experimental results are given.