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# ==========================================================================
#
# 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.
#
# ==========================================================================*/
import sys
import numpy as np
import itk
if len(sys.argv) < 2:
print("Usage: " + sys.argv[0] + " <input_image>")
sys.exit(1)
filename = sys.argv[1]
image = itk.imread(filename)
meta_data = dict(image)
assert meta_data["0008|0008"] == "ORIGINAL\\PRIMARY\\AXIAL"
assert meta_data["0008|0016"] == "1.2.840.10008.5.1.4.1.1.2"
assert (
meta_data["0010|0010"]
== "LIVER DONOR PHANTOM 2 "
)
assert np.allclose(meta_data["origin"], np.array([-836.0, -144.0, -122.0]))
assert np.allclose(meta_data["spacing"], np.array([1.0, 0.484375, 0.484375]))
assert np.allclose(
meta_data["direction"],
np.array([[1.0, 0.0, 0.0], [0.0, 1.0, 0.0], [0.0, 0.0, 1.0]]),
)
assert image["0008|0008"] == "ORIGINAL\\PRIMARY\\AXIAL"
assert image["0008|0016"] == "1.2.840.10008.5.1.4.1.1.2"
assert (
image["0010|0010"]
== "LIVER DONOR PHANTOM 2 "
)
assert np.allclose(image["origin"], np.array([-836.0, -144.0, -122.0]))
assert np.allclose(image["spacing"], np.array([1.0, 0.484375, 0.484375]))
assert np.allclose(
image["direction"], np.array([[1.0, 0.0, 0.0], [0.0, 1.0, 0.0], [0.0, 0.0, 1.0]])
)
new_origin = np.array([1.0, 5.0, 8.0])
image["origin"] = new_origin
assert np.allclose(image["origin"], new_origin)
# NumPy indexing order is reverse of ITK
assert np.allclose(np.array(image.GetOrigin()), np.array([8.0, 5.0, 1.0]))
# __getitem__
assert image[0, 5, 8] == -999
# __setitem__
image[0, 5, 8] = 123
assert image[0, 5, 8] == 123
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