== fft2d-highpass ==

Applies a highpass filter to a BMP image, using a Fast Fourier Transform. The first argument is the lower cutoff frequency.

{{{
 repa-fft2d-highpass 2 lena.bmp lena-high2.bmp
}}}


=== Test Data ===

`lena.bmp` is a standard test image. See [http://en.wikipedia.org/wiki/Lenna http://en.wikipedia.org/wiki/Lenna]

|| lena.bmp || lena-high2.bmp ||