Plugin GIMP : Fourier Transform I. What it does It does a direct and reverse Fourier Transform. It allows you to work in the frequency domain. For instance, it can be used to remove moiré patterns from images scanned from books. (See README.Moire) II. Use It adds menu items : Filters/Generic/Foward FFT Filters/Generic/Inverse FFT III. Installation Linux: make make install You will need the fftw3 package, and the development packages of gimp, fftw3, and glib. Win32: Binaries for win32 are provided (in a separate package), just copy the files in the plugins directory of : your personal gimp directory (ex: .gimp-2.2\plug-ins), or in the global directory (C:\Program Files\GIMP-2.2\lib\gimp\2.0\plug-ins) If you don't have fftw3 installed on your system, you must download the provided fftw3.dll, and copy it where you stored the plugin. You can compile it with the free environment DevCPP (mingw compiler). You will need several DevPak : fftw3, GTK and gimp-dev (available on devpaks.org). gimp-dev is designed to work with binaries version of History : v0.1.1 : First release of this plugin v0.1.2 : BugFixes by Mogens Kjaer <mk@crc.dk>, May 5, 2002 v0.1.3 : Converted to Gimp 2.0 (dirty conversion) v0.2.0 : Many improvements from Mogens Kjaer <mk@crc.dk>, Mar 16, 2005 * Moved to gimp-2.2 * Handles RGB and grayscale images * Scale factors stored as parasite information * Columns are swapped v0.3.0 : Great Improvement from Alex Fernández with dynamic boosting : * Dynamic boosted normalization : fft/inverse loss of quality is now un-noticeable * Removed the need of parasite information v0.3.1 : Zero initialize padding (patch provided by Rene Rebe) Many thanks to Mogens Kjaer, Alex Fernández and Rene Rebe for their contributions. -- Rémi Peyronnet remi.peyronnet@via.ecp.fr http://www.via.ecp.fr/~remi