fftw {rimage} | R Documentation |
This function applies FFT to 2-dimensional data (i.e. image) using fftw library.
fftw(img, dir = -1, debug=FALSE)
img |
target image |
dir |
set -1 for normal transformation and 1 for inverse transformation |
debug |
set TRUE if you want to output debug message |
a matrix of complex number
FFTW (Fastest Fourier Transform in the West) http://www.fftw.org