基于DaVinci的自动对焦算法研究及实现

随着信息技术、超大规模集成电路技术、微电子技术的进一步发展，特别是高性能微处理器的使用，数字视频技术得以飞速发展。视频系统的基本功能是为了获取清晰图像，而自动对焦技术对图像质量影响很大。该文对自动对焦算法的关键技术进行研究，提出了改进的自动对焦算法。搭建了基于达芬奇（DaVinci）DM6437处理器的硬件平台，并在该平台上实现了自动对焦。从对焦速度来看，完成一次对焦约需0．65S，基本达到了系统的设计要求。

Research on Auto Focus Algorithm and Realization based on DaVinci Platform

With the development of information technology,the ultra large-scale integrated circuit technology and the microelectronic technology,particularly the use of high-performance microprocessor,the digital video technology also has a rapid advance.The basic function for video system is to achieve clear images,and the auto focus technology has a great impact on image quality.The key technologies of auto focus algorithm are studied,and an improved auto focus algorithm is proposed.A hardware platform based on DaVinci DM6437 processor is constructed,and on this platform,the auto focus is implemented,and a time of auto focus could be completed within about 0.6 s,thus basically satisfying the design requirements of the system.