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xxxxxxxxxx// casacore::LCPagedMask mask1 = casacore::LCPagedMask(casacore::RegionHandler::makeMask (r1, "mask0"));//# ImageFFT.h: FFT an image//# Copyright (C) 1996,1997,1998,1999,2000,2001//# Associated Universities, Inc. Washington DC, USA.//#//# This library is free software; you can redistribute it and/or modify it//# under the terms of the GNU Library General Public License as published by//# the Free Software Foundation; either version 2 of the License, or (at your//# option) any later version.//#//# This library is distributed in the hope that it will be useful, but WITHOUT//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public//# License for more details.//#//# You should have received a copy of the GNU Library General Public License//# along with this library; if not, write to the Free Software Foundation,//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.//#//# Correspondence concerning AIPS++ should be addressed as follows://# Internet email: aips2-request@nrao.edu.//# Postal address: AIPS++ Project Office//# National Radio Astronomy Observatory//# 520 Edgemont Road//# Charlottesville, VA 22903-2475 USA//#//# $Id: ImageFFT.h 20291 2008-03-21 07:19:34Z gervandiepen $namespace casacore {class CoordinateSystem;class IPosition;}namespace casa {// <summary>// FFT an image// </summary>// <use visibility=export>// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">// </reviewed>// <prerequisite>// <li> <linkto class=casacore::LatticeFFT>LatticeFFT</linkto> // <li> <linkto class=casacore::ImageInterface>ImageInterface</linkto> // <li> <linkto class=casacore::TempImage>TempImage</linkto> // </prerequisite>// <etymology>// Take the fast Fourier Transform of an image.// </etymology>// <synopsis>// This class takes the FFT of an image. It can// take the FFT of just the sky plane(s) of an image or// the specified axes.//// When you specify axes, if any of them are a sky axis (casacore::DirectionCoordinate)// you must give both sky axes.//// Masked pixels are given the value 0.0 before the FFT is taken and the// mask is copied to the output. Note that it is the callers responsibility// to give the output a mask if the input is masked. Otherwise the mask// will not be copied to the output//// This class holds the FourierTransform internally in a // <linkto class=casacore::TempImage>TempImage</linkto> object. This is// in memory or on disk depending upon its size and the amount// of memory in your computer. The algorithm used// is that in <linkto class=casacore::TempLattice>TempLattice</linkto>.//// In generating the Fourier Coordinates, it is currently// assumed that there is no coordinate rotation. This // needs to be dealt with.// </synopsis>//// <example>// <srcblock>//// // Make a constant image