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File:Fafo2test0.jpg Example for the demonstration of the [[discrete Fourier]] [[Category:Discrete Fourier]](642 × 642 (13 KB)) - 10:34, 21 June 2013File:Fafo2test0.png Test image, used for the demonstration of the [[Fourier-2 transform]] and the Fourier-filtering of the images. // Fourier is not performed(642 × 642 (5 KB)) - 09:39, 21 June 2013File:Fafo2test0b.gif Example of the application of the [[Discrete Fourier]] [[Category:Discrete Fourier]](642 × 642 (4 KB)) - 10:35, 21 June 2013File:Fafo2test1.gif Example of application of the [[Discrete Fourier]]. [[Category:Discrete Fourier]](642 × 642 (12 KB)) - 10:37, 21 June 2013File:Fafo2test1.jpg Example of application of the [[discrete Fourier]]. [[Category:Discrete Fourier]](642 × 642 (28 KB)) - 10:38, 21 June 2013File:Fafo2test1.png Modullus of the [[Fourier-2 transform]] of the bi–dimiensional real array [[File:Fafo2test0.png|12 The discrete implementation of the Fourier–2 transform approximates the integral transform $B$ of the function $A$ i(642 × 642 (8 KB)) - 09:39, 21 June 2013File:Fafo2test2.gif Example of filtering of image with the [[Discrete Fourier]] [[Category:Discrete Fourier]](642 × 642 (8 KB)) - 10:39, 21 June 2013File:Fafo2test2.png The [[Fourier-2 transform]] $B$ of the function $A$ is determines with // Fourier:(642 × 642 (6 KB)) - 09:39, 21 June 2013File:Fafo2test2a.jpg Example of filtering of image with [[Discrete Fourier]]. [[Category:Discrete Fourier]](642 × 642 (18 KB)) - 10:41, 21 June 2013File:Fafo2test3.gif Example of filtering of image with [[Discrete Fourier]] [[Category:Discrete Fourier]](642 × 642 (12 KB)) - 10:42, 21 June 2013File:Fafo2test3.jpg Example of filtering of image with [[Discrete Fourier]]. [[Category:Discrete Fourier]](642 × 642 (25 KB)) - 10:43, 21 June 2013File:Fafo2test3.png The [[Fourier-2 transform]] $B$ of the function $A$ is determines with // Fourier:(642 × 642 (8 KB)) - 09:39, 21 June 2013File:FFTexample16T.png Comparison of the discrete Fourier transform, shown with red, ...wn with black dots, to the result of the numerical evaluation of the the [[Fourier operator]] of array $A$, shown with blue. The discrete representation is pe(2,101 × 1,536 (155 KB)) - 09:39, 21 June 2013File:FourierExampleGauss04Ta.png Illustration of the numerical implementation of the [[Fourier transform]] at the sample of 4 nodes. The numerical Fourier transform $B$ is shown with red segmented line.(1,287 × 266 (35 KB)) - 09:39, 21 June 2013File:FourierExampleGauss16pol04Ta.png [[Explicit plot]] of the [[self-Fourier function]] and its discrete approximation. ...6657$ , the $A$ is practically overlapped with the evaluation of its the Fourier transform, $B$, red curve,(2,134 × 470 (88 KB)) - 09:39, 21 June 2013File:SelfCosFTt200.png Two self-fourier functions and their discrete representations and their discrete [[CosFourie For these self-fourier functions, the [[DCTI]]s coincide with the originals with 8 decimal digits.(1,467 × 637 (100 KB)) - 09:42, 21 June 2013File:Z f8e0e5e5.jpg [[Category:Fourier]](900 × 598 (66 KB)) - 09:41, 21 June 2013- ...with the truncated series above can be useful for the evaluation of the [[Fourier integral]]s with function nori.13 KB (1,759 words) - 18:45, 30 July 2019
- //The routine below is float implementation of the sin fourier transform ([[FSFT]]. It is supposed to be compiled together with [[four1.ci [[Category:Fourier]]2 KB (228 words) - 07:00, 1 December 2018
File:Cosftes04t300.jpg [[Category:Self-Fourier]](2,366 × 564 (135 KB)) - 08:32, 1 December 2018