def test_write_3d_itk(self):
log = logging.getLogger("TestWritePluginITK.test_write_3d_itk")
log.debug("test_write_3d_itk")
si = Series(
os.path.join('data', 'itk', 'time', 'Image_00000.mha'),
'none',
self.opts)
self.assertEqual(si.dtype, np.uint16)
self.assertEqual(si.shape, (40, 192, 152))
# log.debug("test_write_3d_itk: sliceLocations {}".format(
# si.sliceLocations))
log.debug("test_write_3d_itk: tags {}".format(si.tags))
log.debug("test_write_3d_itk: spacing {}".format(si.spacing))
log.debug("test_write_3d_itk: imagePositions {}".format(
si.imagePositions))
log.debug("test_write_3d_itk: orientation {}".format(si.orientation))
# Modify header
si.sliceLocations = [i for i in range(40)]
si.spacing = (3, 2, 1)
for slice in range(len(si.sliceLocations)):
si.imagePositions = {
slice:
np.array([slice, 1, 0])
}
for slice in range(si.shape[1]):
si.imagePositions = {
slice: si.getPositionForVoxel(np.array([slice, 0, 0]))
}
# Store image with modified header
with tempfile.TemporaryDirectory() as d:
si.write(d, self.opts)
# Read back the ITK data and verify that the header was modified
si2 = Series(
d,
'none',
self.opts)
self.assertEqual(si.shape, si2.shape)
np.testing.assert_array_equal(si, si2)
# np.testing.assert_array_equal(hdr.sliceLocations, hdr2.sliceLocations)
compare_headers(self, si, si2)
def test_slicing_z(self):
a1 = np.eye(128)
a1.shape = (1, 128, 128)
a = np.vstack([a1, a1, a1])
s = Series(a)
s.spacing = (1, 1, 1)
s.sliceLocations = [3, 6, 9]
for slice in range(s.slices):
s.imagePositions = {slice: np.array([slice, 0, 0])}
s.axes[0] = imagedata.axis.UniformLengthAxis('slice', 0, s.shape[0])
a_slice = a[0:2, ...]
s_slice = s[0:2, ...]
np.testing.assert_array_equal(a_slice, s_slice)
self.assertEqual(s_slice.slices, 2)
np.testing.assert_array_equal(s_slice.sliceLocations, np.array([3, 6]))
# Compare imagePositions
ipp2 = {}
for slice in range(2):
ipp2[slice] = np.array([slice, 0, 0])
self.assertEqual(len(s_slice.imagePositions), len(ipp2))
for slice in range(2):
np.testing.assert_array_equal(s_slice.imagePositions[slice],
ipp2[slice])
def test_write_4d_itk(self):
log = logging.getLogger("TestWritePlugin.test_write_4d_itk")
log.debug("test_write_4d_itk")
si = Series(
[os.path.join('data', 'itk', 'time', 'Image_00000.mha'),
os.path.join('data', 'itk', 'time', 'Image_00001.mha'),
os.path.join('data', 'itk', 'time', 'Image_00002.mha')],
imagedata.formats.INPUT_ORDER_TIME,
self.opts)
self.assertEqual(si.dtype, np.uint16)
self.assertEqual(si.shape, (3, 3, 192, 152))
# np.testing.assert_array_almost_equal(np.arange(0, 10*2.256, 2.256), hdr.getTimeline(), decimal=2)
# log.debug("test_write_4d_itk: sliceLocations", hdr.sliceLocations)
# log.debug("test_write_4d_itk: tags {}".format(hdr.tags))
# log.debug("test_write_4d_itk: spacing", hdr.spacing)
# log.debug("test_write_4d_itk: imagePositions", hdr.imagePositions)
# log.debug("test_write_4d_itk: orientation", hdr.orientation)
# Modify header
si.sliceLocations = (1, 2, 3)
si.spacing = (3, 2, 1)
for slice in range(si.shape[1]):
si.imagePositions = {
slice:
np.array([slice, 1, 0])
}
si.orientation = np.array([0, 0, 1, 0, 1, 0])
for slice in range(si.shape[1]):
si.imagePositions = {
slice: si.getPositionForVoxel(np.array([slice, 0, 0])).reshape((3, 1))
}
si.sort_on = imagedata.formats.SORT_ON_TAG
log.debug("test_write_4d_itk: hdr.sort_on {}".format(
imagedata.formats.sort_on_to_str(si.sort_on)))
si.output_dir = 'single'
with tempfile.TemporaryDirectory() as d:
si.write(d, self.opts)
# Read back the ITK data and verify that the header was modified
si2 = Series(
d,
imagedata.formats.INPUT_ORDER_TIME,
self.opts)
self.assertEqual((3, 3, 192, 152), si2.shape)
# np.testing.assert_array_equal(si, si2)
# np.testing.assert_array_equal(hdr.sliceLocations, hdr2.sliceLocations)
# log.debug("hdr2.tags.keys(): {}".format(hdr2.tags.keys()))
tags = {}
for slice in range(3):
tags[slice] = np.arange(3)
self.assertEqual(tags.keys(), si2.tags.keys())
for k in si2.tags.keys():
np.testing.assert_array_equal(tags[k], si2.tags[k])
np.testing.assert_array_equal(si.spacing, si2.spacing)
image_positions = {}
for slice in range(3):
image_positions[slice] = np.array([0, 1 + 3 * slice, 0])
self.assertEqual(image_positions.keys(),
si2.imagePositions.keys())
np.testing.assert_array_equal(si.orientation, si2.orientation)
