摘要
随着数码相机普遍进入千万级有效像素的行列,大多数相机都采用了多个对焦窗口的自动对焦技术。为实现对焦窗口的快速选择和自动对焦,文中采用统计分析的方法,研究了近距离物体优先的对焦窗口自动选择的可行性,就选择适宜的对焦评价函数提出建议;通过MatLab仿真实验给出了评价函数的大小阈值,提出了近距离物体优先的对焦窗口自动选择和自动对焦策略,给出了对焦搜索基本流程。这种对焦窗口选择,实时性好,适用性强,可作为数码相机的一种对焦窗口自动选择策略。
With digital cameras universally accessing to 10 million effective pixels,most digital cameras have adopted AF technology of multi-focus-windows.To realize the rapid selection of focus-window and AF function,a research on the feasibility of priority of close-up objects for AF window is proposed,using the method of statistical analysis.Through MatLab simulation experiment,the focus estimating function and its threshold as well as the strategy of focus-window auto selection and AF are put forward,and the basic process of focus-searching provided.This kind of window selection,which is real-time and serviceable,can be used as an automatic focus-window selection strategy for digital cameras.
出处
《光学仪器》
2012年第4期26-29,共4页
Optical Instruments
关键词
数码相机
自动对焦(AF)
对焦窗口
评价函数
搜索算法
仿真
digital camera
auto-focusing（AF）
focus window
estimating function
searching algorithm
simulation
