基于单片机的CCD摄像机自动调焦方法的仿真研究

基于单片机信号处理的自动聚焦系统通过对CCD图像传感器输出的视频信号进行滤波,析出反映聚焦清晰程度的高频分量,单片机采样、分析、控制马达转动镜头至对焦清楚的位置。为了避免该系统设计过程中调试硬件带来的困难和复杂性,先将视频信号用图像采集卡采集到计算机上,然后使用Matlab这一功能强大的软件对该系统的关键技术进行仿真分析,并给出实验仿真结果,为系统的硬件电路设计和算法实现提供支持。

Simulation of Automatic Focusing arithmetic Single Chip-based CCD Camera

The single chip-based automatic focusing system out put the high frequency through filtering the video signal provided by CCD image sensor,the single chip microprocessor samples,analyzes and controls motor to rotate lens to a location where the focus is clear.To avoid the complexity of hardware debugging,the video signal is sampled through a TV card to the computer.And then the key techniques of the system are emulated and analyzed with Matlab which has strong functions,the experimental emulate results are also given,which give a great support to the hardware design and arithmetic realization.