ITK  5.4.0
Insight Toolkit
SphinxExamples/src/Filtering/ImageFeature/ComputeLaplacian/Code.py
1 #!/usr/bin/env python
2 
3 # Copyright NumFOCUS
4 #
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
8 #
9 # https://www.apache.org/licenses/LICENSE-2.0.txt
10 #
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
16 
17 import itk
18 import argparse
19 
20 parser = argparse.ArgumentParser(description="Compute Laplacian.")
21 parser.add_argument("input_image")
22 parser.add_argument("output_image")
23 args = parser.parse_args()
24 
25 InputPixelType = itk.F
26 OutputPixelType = itk.UC
27 Dimension = 2
28 
29 InputImageType = itk.Image[InputPixelType, Dimension]
30 OutputImageType = itk.Image[OutputPixelType, Dimension]
31 
32 ReaderType = itk.ImageFileReader[InputImageType]
33 reader = ReaderType.New()
34 reader.SetFileName(args.input_image)
35 
36 FilterType = itk.LaplacianImageFilter[InputImageType, InputImageType]
37 laplacianFilter = FilterType.New()
38 laplacianFilter.SetInput(reader.GetOutput())
39 
40 RescaleFilterType = itk.RescaleIntensityImageFilter[InputImageType, OutputImageType]
41 rescaler = RescaleFilterType.New()
42 rescaler.SetInput(laplacianFilter.GetOutput())
43 
44 outputPixelTypeMinimum = itk.NumericTraits[OutputPixelType].min()
45 outputPixelTypeMaximum = itk.NumericTraits[OutputPixelType].max()
46 
47 rescaler.SetOutputMinimum(outputPixelTypeMinimum)
48 rescaler.SetOutputMaximum(outputPixelTypeMaximum)
49 
50 WriterType = itk.ImageFileWriter[OutputImageType]
51 writer = WriterType.New()
52 writer.SetFileName(args.output_image)
53 writer.SetInput(rescaler.GetOutput())
54 
55 writer.Update()
itk::LaplacianImageFilter
This filter computes the Laplacian of a scalar-valued image.
Definition: itkLaplacianImageFilter.h:63
itk::ImageFileReader
Data source that reads image data from a single file.
Definition: itkImageFileReader.h:75
itk::ImageFileWriter
Writes image data to a single file.
Definition: itkImageFileWriter.h:88
itk::NumericTraits
Define additional traits for native types such as int or float.
Definition: itkNumericTraits.h:59
itk::RescaleIntensityImageFilter
Applies a linear transformation to the intensity levels of the input Image.
Definition: itkRescaleIntensityImageFilter.h:133
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:88