%0 Journal Article
%T Adaptive Autofocus Technique Under Different Contrast<br>不同对比度下自适应的自动调焦新算法
%A HAN Rui-yu
%A WANG Jin-jiang
%A NIE Kai
%A LIU Yang
%A <br>韩瑞雨
%A 王晋疆
%A 聂凯
%A 刘阳
%J 光子学报
%D 2012
%I 
%X For most of the auto-focus function's problems of focus curve losing desirable characteristics ,falling into local minum value and even losing single peaks,which are caused by changes in contrast,Zernike orthogonal moments was introduced and the focus curves were analyzed.A new auto-focusing algorithm was presented which based on Zernike orthogonal moments and the algorithm's formula was defined.Compared with the focusing effect of several commen auto-focus funtions under different contrast,the algorithm can adapt to different contrast under the focusing process by adjusting the weighting coefficients to change the formula.The experiment compared the algorithm focus curves' difference between completely symmetric objects and non-symmetric objects,proved that the algorithm is more effective for the completely symmetric objects such as the round or spherical objects.
%K Autofocus
%K Auto-focus function
%K Contrast
%K Zernike orthogonal moments<br>自动调焦
%K 调焦函数
%K 对比度
%K Zernike正交矩
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=1D36885FD7A8294B5CFEE15B3D65ACB0&yid=99E9153A83D4CB11&vid=2001E0D53B7B80EC&iid=0B39A22176CE99FB&sid=8B59EA573021D671&eid=0DEB7A8A66C33AAD&journal_id=1004-4213&journal_name=光子学报&referenced_num=0&reference_num=10