ENH: Test reading ANTs Nifti displacement field metadata

Author: thewtex

Wrapping/Generators/Python/Tests/CMakeLists.txt

@@ -26,6 +26,13 @@ itk_python_add_test(NAME PythonDICOMSeries COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/d
               DATA{${ITK_DATA_ROOT}/Input/DicomSeries/Image0076.dcm}
               DATA{${ITK_DATA_ROOT}/Input/DicomSeries/Image0077.dcm})
 itk_python_add_test(NAME PyImageFilterTest COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/PyImageFilterTest.py)
+itk_python_add_test(NAME PythonConvertMetaData COMMAND
+  ${CMAKE_CURRENT_SOURCE_DIR}/test_metadata.py
+  DATA{${WrapITK_SOURCE_DIR}/images/r16slice.nii.gz}
+  DATA{${WrapITK_SOURCE_DIR}/images/sourceImage.nii.gz}
+  DATA{${WrapITK_SOURCE_DIR}/images/warp2D.nii.gz}
+  DATA{${WrapITK_SOURCE_DIR}/images/warp3D.nii.gz}
+  )
 
 # some tests will fail if dim=2 and unsigned short are not wrapped
 INTERSECTION(WRAP_2 2 "${ITK_WRAP_IMAGE_DIMS}")

Wrapping/Generators/Python/Tests/test_metadata.py

@@ -0,0 +1,50 @@
+# ==========================================================================
+#
+#   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
+#
+#          https://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.
+#
+# ==========================================================================*/
+
+# Ensure we can convert all Nifti metadata members to Python
+
+import sys
+import numpy as np
+import pathlib
+from pprint import pprint
+
+import itk
+
+nifti_image_2d_filepath = sys.argv[1]
+image = itk.imread(nifti_image_2d_filepath)
+metadata = dict(image)
+print('2D image')
+pprint(metadata)
+
+nifti_image_3d_filepath = sys.argv[2]
+image = itk.imread(nifti_image_3d_filepath, itk.F)
+metadata = dict(image)
+print('3D image')
+pprint(metadata)
+
+nifti_displacement_2D_filepath = sys.argv[3]
+field = itk.imread(nifti_displacement_2D_filepath, itk.F)
+metadata = dict(field)
+print('2D displacement field')
+pprint(metadata)
+
+nifti_displacement_3D_filepath = sys.argv[4]
+field = itk.imread(nifti_displacement_3D_filepath, itk.F)
+metadata = dict(field)
+print('3D displacement field')
+pprint(metadata)

Wrapping/images/r16slice.nii.gz.sha512

@@ -0,0 +1 @@
+ba471888bf8ad9f9230c1b1f3a7874dcb1ccba15439835c2b3b54eb811a9bf948fc255abde7df51e6067f93b7815fdb4b7ae31a4a615bea2fc5893279ab2ccb1

Wrapping/images/sourceImage.nii.gz.sha512

@@ -0,0 +1 @@
+85827430d88400feaac93141d7e7e1c32f3c885868c769a5385cbaa793044794b586c86cb1f3b285dbc5d274bd43b427c2082a0484cad70bd34d2df29059333b

Wrapping/images/warp2D.nii.gz.sha512

@@ -0,0 +1 @@
+fc358313c2478db9bf1edef9159a1647754c525fec4977a51b6baf67145b49f1cb518871397f974e18d55a5627310f1718389547481ba85c4901c62be056ede3

Wrapping/images/warp3D.nii.gz.sha512

@@ -0,0 +1 @@
+8b57d3dfa1a795bc98aa6d16eadfaaa406445bb84c021dd298e5d3b4aadc0c6109292419d3ed5e58aafcf9d73c18be25ef9492427af433970a5996201673de5c