Changes between Version 17 and Version 18 of Examples/Fft2dHighpass


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Timestamp:
May 17, 2010, 8:23:35 AM (15 years ago)
Author:
Ben Lippmeier
Comment:

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  • Examples/Fft2dHighpass

    v17 v18  
    11= fft2d-highpass =
    22
    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.
     3Applies a highpass filter to a BMP image, using a recursive, radix-2 Decimation In Iime (DIT) [http://en.wikipedia.org/wiki/Fast_fourier_transform Fast Fourier Transform]. The first argument is the lower cutoff frequency.
    44
    55Each 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.