68 lines
2.5 KiB
Python
68 lines
2.5 KiB
Python
#!/usr/bin/env python3
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# ******************************************************************************
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#
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# Project: GDAL
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# Purpose: Example computing the magnitude and phase from a complex image.
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# Author: Frank Warmerdam, warmerdam@pobox.com
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#
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# ******************************************************************************
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# Copyright (c) 2008, Frank Warmerdam <warmerdam@pobox.com>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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# DEALINGS IN THE SOFTWARE.
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# ******************************************************************************
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import sys
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from osgeo import gdal
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import numpy as np
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from osgeo import gdal_array
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def doit(src_filename, dst_magnitude, dst_phase):
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src_ds = gdal.Open(src_filename)
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xsize = src_ds.RasterXSize
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ysize = src_ds.RasterYSize
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print('{} x {}'.format(xsize, ysize))
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src_image = src_ds.GetRasterBand(1).ReadAsArray()
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mag_image = pow(np.real(src_image) * np.real(src_image) +
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np.imag(src_image) * np.imag(src_image), 0.5)
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gdal_array.SaveArray(mag_image, dst_magnitude)
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phase_image = np.angle(src_image)
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gdal_array.SaveArray(phase_image, dst_phase)
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return 0
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def main(argv):
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src_filename = 'complex.tif'
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dst_magnitude = 'magnitude.tif'
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dst_phase = 'phase.tif'
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if len(argv) > 1:
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src_filename = argv[1]
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if len(argv) > 2:
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dst_magnitude = argv[2]
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if len(argv) > 3:
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dst_phase = argv[3]
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return doit(src_filename, dst_magnitude, dst_phase)
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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