Changes between Version 17 and Version 18 of Examples/Fft2dHighpass
 Timestamp:
 05/17/10 09:23:35 (6 years ago)
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Examples/Fft2dHighpass
v17 v18 1 1 = fft2dhighpass = 2 2 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.3 Applies a highpass filter to a BMP image, using a recursive, radix2 Decimation In Iime (DIT) [http://en.wikipedia.org/wiki/Fast_fourier_transform Fast Fourier Transform]. The first argument is the lower cutoff frequency. 4 4 5 5 Each of the RGB channels is converted to the frequency domain, the lower frequencies are set to zero, then the channels are converted back to the image domain.