text: #!/usr/bin/env python3
  # ******************************************************************************
  #
  #  Project:  GDAL
  #  Purpose:  Example computing the magnitude and phase from a complex image.
  #  Author:   Frank Warmerdam, warmerdam@pobox.com
  #
  # ******************************************************************************
  #  Copyright (c) 2008, Frank Warmerdam <warmerdam@pobox.com>
  #
  #  Permission is hereby granted, free of charge, to any person obtaining a
  #  copy of this software and associated documentation files (the "Software"),
  #  to deal in the Software without restriction, including without limitation
  #  the rights to use, copy, modify, merge, publish, distribute, sublicense,
  #  and/or sell copies of the Software, and to permit persons to whom the
  #  Software is furnished to do so, subject to the following conditions:
  #
  #  The above copyright notice and this permission notice shall be included
  #  in all copies or substantial portions of the Software.
  #
  #  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  #  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  #  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  #  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  #  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  #  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  #  DEALINGS IN THE SOFTWARE.
  # ******************************************************************************
  
  from osgeo import gdal
  import gdalnumeric
  try:
      import numpy
  except ImportError:
      import Numeric as numpy
  
  
  src_ds = gdal.Open('complex.tif')
  xsize = src_ds.RasterXSize
  ysize = src_ds.RasterYSize
  
  src_image = src_ds.GetRasterBand(1).ReadAsArray()
  mag_image = pow(numpy.real(src_image) * numpy.real(src_image) +
                  numpy.imag(src_image) * numpy.imag(src_image), 0.5)
  gdalnumeric.SaveArray(mag_image, 'magnitude.tif')
  
  phase_image = numpy.angle(src_image)
  gdalnumeric.SaveArray(phase_image, 'phase.tif')
  