%0 Journal Article
%T Study on Choice of Method of Filter in De-noising and Effect of Nonlinear<br>去噪和非线性效应中滤波方法的选择研究
%A QIAO Nao-sheng
%A YAO Chun-mei
%A ZHAO Hua-jun
%A CAI Xin-hua
%A GUO Jie-rong
%A <br>乔闹生
%A 姚春梅
%A 赵华君
%A 蔡新华
%A 郭杰荣
%J 光子学报
%D 2008
%I 
%X For the characteristics in de-noising and the effect of nonlinear, basic theorems in de-noising and the effect of nonlinear are analyzed, Three methods (the filter of rectangle window, hanning window and threshold restriction) of their advantages and disadvantages are given. The effect of measuring precision for fourier transform profilometry (FTP) among three different methods of filter are compared. Computer simulations indicate that threshold restriction is the best method for de-noising in linear, but the methods of rectangle window and hanning window are better than that of threshold restriction in nonlinear. The effect of nonlinear is for the most part in experiments, the result shows that the methods of rectangle window is the best while that of threshold restriction is the worst to regain the shape of object. Compared the rectangle window with the hanning window in filter of Computer simulations and experiments, the effect of rectangle window is better than the latter.
%K Information optics
%K Method of filter
%K De-noising
%K Nonlinear effect
%K Fourier transform profilometry(FTP)
%K Measuring precision<br>信息光学
%K 滤波方法
%K 去噪
%K 非线性效应
%K 傅里叶变换轮廓术(FTP)
%K 测量准确度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=68C09A4DC6946BD39CF6D2773F79997B&yid=67289AFF6305E306&vid=42425781F0B1C26E&iid=E158A972A605785F&sid=5AE7FA263C8A6D65&eid=8243B77967FFD12E&journal_id=1004-4213&journal_name=光子学报&referenced_num=0&reference_num=13