138 lines
4.1 KiB
Python
138 lines
4.1 KiB
Python
#!/usr/bin/env python3
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###############################################################################
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# $Id: fft.py e4fe7cc06270e5f38dfe78e6785a6bcca4e39e29 2021-04-01 21:02:04 +0300 Idan Miara $
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#
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# Project: GDAL Python samples
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# Purpose: Script to perform forward and inverse two-dimensional fast
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# Fourier transform.
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# Author: Andrey Kiselev, dron@remotesensing.org
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#
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###############################################################################
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# Copyright (c) 2003, Andrey Kiselev <dron@remotesensing.org>
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# Copyright (c) 2009, Even Rouault <even dot rouault at spatialys.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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import FFT
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from osgeo import gdal
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# =============================================================================
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def Usage():
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print('Usage: fft.py [-inv] [-of out_format] [-ot out_type] infile outfile')
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print('')
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return 1
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def ParseType(typ):
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if typ == 'Byte':
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return gdal.GDT_Byte
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elif typ == 'Int16':
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return gdal.GDT_Int16
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elif typ == 'UInt16':
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return gdal.GDT_UInt16
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elif typ == 'Int32':
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return gdal.GDT_Int32
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elif typ == 'UInt32':
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return gdal.GDT_UInt32
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elif typ == 'Float32':
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return gdal.GDT_Float32
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elif typ == 'Float64':
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return gdal.GDT_Float64
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elif typ == 'CInt16':
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return gdal.GDT_CInt16
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elif typ == 'CInt32':
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return gdal.GDT_CInt32
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elif typ == 'CFloat32':
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return gdal.GDT_CFloat32
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elif typ == 'CFloat64':
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return gdal.GDT_CFloat64
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return gdal.GDT_Byte
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def main(argv):
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infile = None
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outfile = None
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frmt = 'GTiff'
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typ = None
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transformation = 'forward'
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# Parse command line arguments.
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i = 1
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while i < len(argv):
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arg = argv[i]
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if arg == '-inv':
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transformation = 'inverse'
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if typ is None:
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typ = gdal.GDT_Float32
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elif arg == '-of':
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i = i + 1
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frmt = argv[i]
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elif arg == '-ot':
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i = i + 1
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typ = ParseType(argv[i])
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# set_type = 'yes'
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elif infile is None:
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infile = arg
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elif outfile is None:
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outfile = arg
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else:
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return Usage()
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i = i + 1
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if infile is None:
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return Usage()
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if outfile is None:
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return Usage()
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if typ is None:
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typ = gdal.GDT_CFloat32
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indataset = gdal.Open(infile, gdal.GA_ReadOnly)
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out_driver = gdal.GetDriverByName(frmt)
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outdataset = out_driver.Create(outfile, indataset.RasterXSize, indataset.RasterYSize, indataset.RasterCount, typ)
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for iBand in range(1, indataset.RasterCount + 1):
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inband = indataset.GetRasterBand(iBand)
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outband = outdataset.GetRasterBand(iBand)
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data = inband.ReadAsArray(0, 0)
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if transformation == 'forward':
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data_tr = FFT.fft2d(data)
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else:
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data_tr = FFT.inverse_fft2d(data)
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outband.WriteArray(data_tr)
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return 0
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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