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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Optical correlator ： ウィキペディア英語版 Optical correlator An optical correlator is a device for comparing two signals by utilising the Fourier transforming properties of a lens.〔A. VanderLugt, ''(Signal detection by complex spatial filtering ),'' IEEE Transactions on Information Theory, vol. 10, 1964, pp. 139-145.〕 It is commonly used in optics for target tracking and identification. ==Introduction== The correlator has an input signal which is multiplied by some filter in the Fourier domain. An example filter is the matched filter which uses the cross correlation of the two signals. The cross correlation or correlation plane, $c(x,y)$ of a 2D signal $i(x,y)$ with $h(x,y)$ is $c(x,y)=i(x,y)\; \backslash otimes\; h^(-x,-y)$ This can be re-expressed in Fourier space as $C(\backslash xi,\backslash eta)=I(\backslash xi,\backslash eta)\; H^(-\backslash xi,-\backslash eta)$ where the capital letters denote the Fourier transform of what the lower case letter denotes. So the correlation can then be calculated by inverse Fourier transforming the result. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Optical correlator」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.