ITK  5.4.0
Insight Toolkit
SphinxExamples/src/Filtering/ImageGrid/WarpAnImageUsingADeformationField/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="Wrap An Image Using A Deformation Field.")
21 parser.add_argument("input_image")
22 parser.add_argument("displacement_field")
23 parser.add_argument("output_image")
24 args = parser.parse_args()
25 
26 Dimension = 2
27 
28 VectorComponentType = itk.F
29 VectorPixelType = itk.Vector[VectorComponentType, Dimension]
30 
31 DisplacementFieldType = itk.Image[VectorPixelType, Dimension]
32 
33 PixelType = itk.UC
34 ImageType = itk.Image[PixelType, Dimension]
35 
36 reader = itk.ImageFileReader[ImageType].New()
37 reader.SetFileName(args.input_image)
38 
39 fieldReader = itk.ImageFileReader[DisplacementFieldType].New()
40 fieldReader.SetFileName(args.displacement_field)
41 fieldReader.Update()
42 
43 deformationField = fieldReader.GetOutput()
44 
45 warpFilter = itk.WarpImageFilter[ImageType, ImageType, DisplacementFieldType].New()
46 
47 interpolator = itk.LinearInterpolateImageFunction[ImageType, itk.D].New()
48 
49 warpFilter.SetInterpolator(interpolator)
50 
51 warpFilter.SetOutputSpacing(deformationField.GetSpacing())
52 warpFilter.SetOutputOrigin(deformationField.GetOrigin())
53 warpFilter.SetOutputDirection(deformationField.GetDirection())
54 
55 warpFilter.SetDisplacementField(deformationField)
56 
57 warpFilter.SetInput(reader.GetOutput())
58 
59 writer = itk.ImageFileWriter[ImageType].New()
60 writer.SetInput(warpFilter.GetOutput())
61 writer.SetFileName(args.output_image)
62 
63 writer.Update()
itk::Vector
A templated class holding a n-Dimensional vector.
Definition: itkVector.h:62
itk::ImageFileReader
Data source that reads image data from a single file.
Definition: itkImageFileReader.h:75
itk::LinearInterpolateImageFunction
Linearly interpolate an image at specified positions.
Definition: itkLinearInterpolateImageFunction.h:51
itk::ImageFileWriter
Writes image data to a single file.
Definition: itkImageFileWriter.h:88
itk::WarpImageFilter
Warps an image using an input displacement field.
Definition: itkWarpImageFilter.h:85
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:88
New
static Pointer New()