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#!/usr/bin/env python
#******************************************************************************
#
# 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.
#******************************************************************************
import gdal
import gdalnumeric
try:
import numpy
except:
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' )
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