EVOLUTION-MANAGER

Edit File: magphase.py

#!/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' )