SimpleGaussian/SimpleGaussian.py

#!/usr/bin/env python
# =========================================================================
#
#  Copyright NumFOCUS
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0.txt
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
#
# =========================================================================
 
from __future__ import print_function
 
import os
import sys
 
import SimpleITK as sitk
 
if len(sys.argv) < 4:
    print("Usage: SimpleGaussian <input> <sigma> <output>")
    sys.exit(1)
 
reader = sitk.ImageFileReader()
reader.SetFileName(sys.argv[1])
image = reader.Execute()
 
pixelID = image.GetPixelID()
 
gaussian = sitk.SmoothingRecursiveGaussianImageFilter()
gaussian.SetSigma(float(sys.argv[2]))
image = gaussian.Execute(image)
 
caster = sitk.CastImageFilter()
caster.SetOutputPixelType(pixelID)
image = caster.Execute(image)
 
writer = sitk.ImageFileWriter()
writer.SetFileName(sys.argv[3])
writer.Execute(image)
 
if ("SITK_NOSHOW" not in os.environ):
    sitk.Show(image, "Simple Gaussian")