%0 Journal Article
%T Fractional Correlation Properties of the Joint Fractional Fourier Transform Correlator<br>联合分数变换相关器的分数相关特性分析
%A Song Xiaoshan
%A Zhao Jianlin
%A Yuan Wencheng
%A Wu Changjiang
%A <br>宋小杉
%A 赵建林
%A 袁文成
%A 吴长江
%J 光子学报
%D 2005
%I 
%X The mathematical expressions of the joint fractional Fourier transform correlator(JFRTC) are demonstrated,according to which,the properties of the JFRTC are discussed.It is shown that the properties of a JFRTC are different from that of a conventional JTC.In a conventional JTC,the distance between the two desired correlation signals at the output plane is fixed and is depended on the distance between the target and the reference images.However,by shifting the fractional orders,the distance between the two desired correlation signals at the output plane of a JFRTC can be changed larger or smaller than that of a conventional JTC.Besides,when the fractional order is shifted appropriately,the distortion of the fractional spectrum derived from the dimension distortion of the target image can be offset.Thus the JFRTC is predicted having the capability of distortion-invariant pattern recognition.On the other hand,the intensity of the desired correlation signals at the output plane of a JFRTC is always lower than that of a conventional JTC.
%K Fractional Fourier transform(FRFT)
%K Joint Fourier transform correlator(JTC)
%K Fractional correlation
%K Joint fractional Fourier transform correlator(JFRTC)
%K Distortion-invariant pattern recognition<br>分数傅里叶变换（FRFT）
%K 联合变换相关器（JTC）
%K 联合分数变换相关器（JFRTC）
%K 分数相关
%K 畸变不变模式识别
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=50B8D4EEC8AD3761&yid=2DD7160C83D0ACED&vid=339D79302DF62549&iid=9CF7A0430CBB2DFD&sid=7264799D7F648D02&eid=40DE18199B7CA9BB&journal_id=1004-4213&journal_name=光子学报&referenced_num=0&reference_num=13