长焦镜头自动聚焦技术的研究与实现

Research and Implementation of Telephoto Lens Auto- Focusing Technology

针对长焦镜头自动聚焦问题,利用图像处理技术及嵌入式平台开发了一套自动聚焦系统。首先确定长焦镜头可调的聚焦范围,并在此范围内以大步进值搜索并到达清晰度最大值处,然后采用小步进值到达清晰点位置。其中清晰度值的实时计算采用硬件IP核的形式在FPGA上实现,并采用SOPC技术实现对各模块的控制。

For telephoto lens automatic focusing problem,this paper develops a set of automatic focusing system by using image processing technology and the embedded platform.Determine the focus of the telephoto lens adjustable range,and within this range to step into the value to search for and reach maximum clarity,then adopts step into value to clear point loca- tion.The definition values of real-time calculation in the form of hardware IP core in FPGA implementation,and control of the module is realized by using SOPC technology.