Changes between Version 6 and Version 7 of Examples/Fft2dHighpass
 Timestamp:
 May 7, 2010, 8:05:56 AM (8 years ago)
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Examples/Fft2dHighpass
v6 v7 1 = = fft2dhighpass ==1 = fft2dhighpass = 2 2 3 3 Applies a highpass filter to a BMP image, using a [http://en.wikipedia.org/wiki/Fast_fourier_transform Fast Fourier Transform]. The first argument is the lower cutoff frequency. … … 9 9 }}} 10 10 11 == = Code ===11 == Code == 12 12 13 13 The main algorithm is at http://code.haskell.org/repa/repastable/repaalgorithms/Data/Array/Repa/Algorithms/FFT.hs … … 15 15 The wrapper is at http://code.haskell.org/repa/repastable/repaexamples/FFT/src/HighPass/Main.hs 16 16 17 == = Test Data ===17 == Test Data == 18 18 [http://en.wikipedia.org/wiki/Lenna http://en.wikipedia.org/wiki/Lenna] is a standard test image. 19 19 … … 22 22  [http://code.haskell.org/repa/wiki/images/lena.bmp full size]  [http://code.haskell.org/repa/wiki/images/lenahigh2.bmp full size]  23 23 24 == = Runtime ===24 == Runtime == 25 25 Compiled with GHC 6.13.20100309. 512x512 image. 26 26