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#!/usr/bin/env python3
###############################################################################
# $Id$
#
# Project: GDAL Python samples
# Purpose: Script to perform forward and inverse two-dimensional fast
# Fourier transform.
# Author: Andrey Kiselev, dron@remotesensing.org
#
###############################################################################
# Copyright (c) 2003, Andrey Kiselev <dron@remotesensing.org>
# Copyright (c) 2009, Even Rouault <even dot rouault at spatialys.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 sys
try:
import FFT
except ModuleNotFoundError:
print("Module FFT not found, cannot continue")
sys.exit(1)
from osgeo import gdal
# =============================================================================
def Usage():
print("Usage: fft.py [-inv] [-of out_format] [-ot out_type] infile outfile")
print("")
return 2
def ParseType(typ):
if typ == "Byte":
return gdal.GDT_Byte
elif typ == "Int16":
return gdal.GDT_Int16
elif typ == "UInt16":
return gdal.GDT_UInt16
elif typ == "Int32":
return gdal.GDT_Int32
elif typ == "UInt32":
return gdal.GDT_UInt32
elif typ == "Float32":
return gdal.GDT_Float32
elif typ == "Float64":
return gdal.GDT_Float64
elif typ == "CInt16":
return gdal.GDT_CInt16
elif typ == "CInt32":
return gdal.GDT_CInt32
elif typ == "CFloat32":
return gdal.GDT_CFloat32
elif typ == "CFloat64":
return gdal.GDT_CFloat64
return gdal.GDT_Byte
def main(argv=sys.argv):
infile = None
outfile = None
driver_name = "GTiff"
typ = None
transformation = "forward"
# Parse command line arguments.
i = 1
while i < len(argv):
arg = argv[i]
if arg == "-inv":
transformation = "inverse"
if typ is None:
typ = gdal.GDT_Float32
elif arg == "-of":
i = i + 1
driver_name = argv[i]
elif arg == "-ot":
i = i + 1
typ = ParseType(argv[i])
# set_type = 'yes'
elif infile is None:
infile = arg
elif outfile is None:
outfile = arg
else:
return Usage()
i = i + 1
if infile is None:
return Usage()
if outfile is None:
return Usage()
if typ is None:
typ = gdal.GDT_CFloat32
indataset = gdal.Open(infile, gdal.GA_ReadOnly)
out_driver = gdal.GetDriverByName(driver_name)
outdataset = out_driver.Create(
outfile,
indataset.RasterXSize,
indataset.RasterYSize,
indataset.RasterCount,
typ,
)
for iBand in range(1, indataset.RasterCount + 1):
inband = indataset.GetRasterBand(iBand)
outband = outdataset.GetRasterBand(iBand)
data = inband.ReadAsArray(0, 0)
if transformation == "forward":
data_tr = FFT.fft2d(data)
else:
data_tr = FFT.inverse_fft2d(data)
outband.WriteArray(data_tr)
return 0
if __name__ == "__main__":
sys.exit(main(sys.argv))
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