ITK  4.13.0
Insight Segmentation and Registration Toolkit
SphinxExamples/src/Filtering/Thresholding/ThresholdAnImage/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 import itk
23 
24 if len(sys.argv) != 5:
25  print("Usage: " + sys.argv[0] + " <inputImage> <outputImage> "
26  "<lowerThreshold> <upperThreshold>")
27  sys.exit(1)
28 
29 inputImage = sys.argv[1]
30 outputImage = sys.argv[2]
31 lowerThreshold = int(sys.argv[3])
32 upperThreshold = int(sys.argv[4])
33 
34 PixelType = itk.UC
35 Dimension = 2
36 
37 ImageType = itk.Image[PixelType, Dimension]
38 
39 reader = itk.ImageFileReader[ImageType].New()
40 reader.SetFileName(inputImage)
41 
42 thresholdFilter = itk.ThresholdImageFilter[ImageType].New()
43 
44 thresholdFilter.SetInput(reader.GetOutput())
45 thresholdFilter.ThresholdOutside(lowerThreshold, upperThreshold)
46 thresholdFilter.SetOutsideValue(0)
47 
48 writer = itk.ImageFileWriter[ImageType].New()
49 writer.SetFileName(outputImage)
50 writer.SetInput(thresholdFilter.GetOutput())
51 
52 writer.Update()