%0 Journal Article
%T Correction of Field Curved Images by the Polynomial Approximation of the Inverse Filtering Function<br>用多项式近似逆滤波函数实现场曲修正
%A Wen Yumei
%A Li Ping
%A Zhu Jun College of Optoelectronic Engineering
%A The Key Lab of Optoelctronic Technology
%A Systems of the Education Ministry
%A Chongqing University
%A <br>文玉梅
%A 李平
%A 朱俊
%J 光子学报
%D 2003
%I 
%X When an optical transfer function is known,the inverse filtering function can be determined and used for image recovery. If the inverse filtering function is continuous, it can actually be represented as a Taylor polynomial. Hence the recovery of images may be approximately realized in spatial domain by the linear combination of the image and its derivatives rather than by the complex deconvolution. It is considerable for the image recovery of the spatially variant system, such as the correction of field curved images, as the spatial variance only reflects in the coefficients of the linear combination. The recovery equations are derived and the processing results are presented.
%K Curvature of fields
%K Spatially variance
%K Image recovery
%K Inverse filtering<br>逆滤波函数
%K 多项式近似
%K 场曲修正
%K 移变系统
%K 图像恢复
%K 图像处理
%K 传递函数
%K 光学系统
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=FA79F82F6F22753B&yid=D43C4A19B2EE3C0A&vid=9971A5E270697F23&iid=B31275AF3241DB2D&sid=04EA291949415E08&eid=0B9C8D3D9D6254B2&journal_id=1004-4213&journal_name=光子学报&referenced_num=3&reference_num=10