用高斯非均匀采样解决自动聚焦中的误判  

Using Gaussian unequally spaced sampling to make automatic focusing result correct

作　　者：朱孔凤[1] 姜威[1] 王端芳[1] 周贤 张进[1] 

机构地区：[1]山东大学信息科学与工程学院,山东济南250100

出　　处：《光学技术》2005年第6期910-912,共3页Optical Technique

摘　　要：在自动聚焦系统中,对焦窗口的选择直接影响对焦的速度和准确性。若窗口过大,则不仅会增加计算量,而且背景图像太多会引起误判;若窗口太小,则会导致目标偏离窗口,也会引起误判。引入非均匀采样,可以保证图像中央区域的高分辨率和较大的视场范围,有效地提高了对焦的准确性,减少了数据量,加快了对焦速度。In automatic focusing system, the focusing window directly affects the speed and veracity of auto-focusing. If focusing window is too big or too small, there will be incorrect focus result because of background in the window or object out of the window. Unequally spaced sampling is introduced in order to get higher resolution in image central part and wider view field. The speed and veracity of focusing are improved and the data of image is reduced.

关 键 词：自动聚焦 图像评价函数 非均匀采样 图像处理 

分 类 号：TB811.4[一般工业技术—摄影技术] TP391[自动化与计算机技术—计算机应用技术]