自动对焦系统中图像非均匀采样的实验研究  

Autofocus System Experiment Study Using Variational Image-sampling

作　　者：李奇[1] 冯华君[1] 徐之海[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室,浙江杭州310027

出　　处：《光子学报》2003年第12期1499-1501,共3页Acta Photonica Sinica

摘　　要：将非均匀采样运用在自动对焦的窗口选择中 ,并进行了实验研究 这种方式可以保持中央的高分辨率 ,并保持较大的视场范围 ,克服了中央选窗时由于成像主体偏离中央引起的误对焦 同时 ,大大减少计算对焦评价函数所需的数据 ,从而加快对焦速度 。Variational sampling method was introduced into auto-focus and was made a window selection strategy. The sampling model keeps higher resolution in image center part and wider view filed, so can avoid incorrect focus result because of main imaging object′s escaping from image center field. Experiment study was made and some conclusions were acquired. New method reduced data involved in operation computing focus measure and quickened focus speed.

关 键 词：非均匀采样 类视网膜模型 自动对焦 图像评价 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]