ITK  4.8.0
Insight Segmentation and Registration Toolkit
SphinxExamples/src/Filtering/ImageGrid/ResampleAVectorImage/Code.py
1 #!/usr/bin/env python
2 
3 #=========================================================================
4 #
5 # Copyright Insight Software Consortium
6 #
7 # Licensed under the Apache License, Version 2.0 (the "License");
8 # you may not use this file except in compliance with the License.
9 # You may obtain a copy of the License at
10 #
11 # http://www.apache.org/licenses/LICENSE-2.0.txt
12 #
13 # Unless required by applicable law or agreed to in writing, software
14 # distributed under the License is distributed on an "AS IS" BASIS,
15 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 # See the License for the specific language governing permissions and
17 # limitations under the License.
18 #
19 #=========================================================================
20 
21 import sys
22 
23 import itk
24 
25 from distutils.version import StrictVersion as VS
26 if VS(itk.Version.GetITKVersion()) < VS("4.7.0"):
27  print("ITK 4.7.0 is required (see example documentation).")
28  sys.exit(1)
29 
30 if len(sys.argv) != 3:
31  print("Usage: " + sys.argv[0] + " [inputImage] [outputImage]")
32  sys.exit(1)
33 
34 inputImage = sys.argv[1]
35 outputImage = sys.argv[2]
36 
37 Dimension = 2
38 
39 PixelType = itk.RGBPixel[itk.UC]
40 ImageType = itk.Image[PixelType, Dimension]
41 
42 ReaderType = itk.ImageFileReader[ImageType]
43 reader = ReaderType.New()
44 reader.SetFileName(inputImage)
45 
46 filterType = itk.ResampleImageFilter[ImageType, ImageType]
47 resampleImageFilter = filterType.New()
48 
49 interpolatorType = itk.LinearInterpolateImageFunction[ImageType, itk.D]
50 interpolator = interpolatorType.New()
51 
52 resampleImageFilter.SetInterpolator(interpolator)
53 
54 transformType = itk.IdentityTransform[itk.D, Dimension]
55 transform = transformType.New()
56 
57 resampleImageFilter.SetTransform(transform)
58 
59 resampleImageFilter.SetDefaultPixelValue([50, 50, 50])
60 resampleImageFilter.SetOutputSpacing([0.5, 0.5])
61 resampleImageFilter.SetOutputOrigin([30, 40])
62 
63 resampleImageFilter.SetSize([300, 300])
64 resampleImageFilter.SetInput(reader.GetOutput())
65 
66 WriterType = itk.ImageFileWriter[ImageType]
67 writer = WriterType.New()
68 writer.SetFileName(outputImage)
69 writer.SetInput(resampleImageFilter.GetOutput())
70 writer.Update()