Changes between Version 4 and Version 5 of Examples/Fft2dHighpass


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Timestamp:
May 7, 2010, 8:05:04 AM (14 years ago)
Author:
Ben Lippmeier
Comment:

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  • Examples/Fft2dHighpass

    v4 v5  
    11== fft2d-highpass ==
    22
    3 Applies a highpass to a BMP image. The first argument is the lower cutoff frequency.
     3Applies 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.
    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.