基于DaVinci的自动对焦算法研究及实现  

Research on Auto Focus Algorithm and Realization based on DaVinci Platform

作　　者：圣钱生[1] 张桂英[1] 吴有俊[1] 陈斌[1] 

机构地区：[1]海军指挥学院浦口分院,江苏南京211800

出　　处：《通信技术》2012年第1期56-58,62,共4页Communications Technology

摘　　要：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0.65 s,基本达到了系统的设计要求。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.

关 键 词：DaVinci自动对焦 对焦评价函数 窗口选择 反馈控制 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]