def test_no_pixel_data_raises(self):
"""Test get_pixeldata raises if dataset has no PixelData."""
ds = dcmread(EXPL_16_1_1F)
del ds.PixelData
assert 'PixelData' not in ds
with pytest.raises(AttributeError, match=' dataset: PixelData'):
get_pixeldata(ds)
def test_unknown_pixel_representation_raises(self):
"""Test get_pixeldata raises if unsupported PixelRepresentation."""
ds = dcmread(EXPL_16_1_1F)
ds.PixelRepresentation = 2
with pytest.raises(ValueError,
match=r"value of '2' for '\(0028,0103"):
get_pixeldata(ds)
def test_unsupported_syntaxes_raises(self):
"""Test get_pixeldata raises if unsupported Transfer Syntax."""
ds = dcmread(EXPL_16_1_1F)
ds.file_meta.TransferSyntaxUID = '1.2.840.10008.1.2.4.50'
with pytest.raises(NotImplementedError,
match=' the transfer syntax is not supported'):
get_pixeldata(ds)
def time_1bit_1sample_3frame(self):
"""Time retrieval of 1-bit, 1 sample/pixel, 3 frame."""
no_runs = self.no_runs
if 'PyPy' in python_implementation():
no_runs = 1
for ii in range(no_runs):
get_pixeldata(self.ds_1_1_3)
def test_array_read_only_bit_packed(self):
"""Test returning a read only array for BitsAllocated = 1."""
ds = dcmread(EXPL_1_1_1F)
arr = get_pixeldata(ds, read_only=False)
assert arr.flags.writeable
arr = get_pixeldata(ds, read_only=True)
assert arr.flags.writeable
def test_bad_length_raises(self):
"""Test bad pixel data length raises exception."""
ds = dcmread(EXPL_8_1_1F)
# Too short
ds.PixelData = ds.PixelData[:-1]
msg = (
r"The length of the pixel data in the dataset doesn't match the "
r"expected amount \(479999 vs. 480000 bytes\). The dataset may be "
r"corrupted or there may be an issue with the pixel data handler."
)
with pytest.raises(ValueError, match=msg):
get_pixeldata(ds)
def test_array_read_only(self):
"""Test returning a read only array for BitsAllocated > 8."""
ds = dcmread(EXPL_8_1_1F)
arr = get_pixeldata(ds, read_only=False)
assert arr.flags.writeable
assert 0 != arr[10]
arr[10] = 0
assert 0 == arr[10]
arr = get_pixeldata(ds, read_only=True)
assert not arr.flags.writeable
with pytest.raises(ValueError, match="is read-only"):
arr[10] = 0
def test_change_photometric_interpretation(self):
"""Test get_pixeldata changes PhotometricInterpretation if required."""
def to_rgb(ds):
"""Override the original function that returned False"""
return True
# Test default
ds = dcmread(EXPL_16_1_1F)
assert ds.PhotometricInterpretation == 'MONOCHROME2'
get_pixeldata(ds)
assert ds.PhotometricInterpretation == 'MONOCHROME2'
# Test modified
orig_fn = NP_HANDLER.should_change_PhotometricInterpretation_to_RGB
NP_HANDLER.should_change_PhotometricInterpretation_to_RGB = to_rgb
get_pixeldata(ds)
assert ds.PhotometricInterpretation == 'RGB'
NP_HANDLER.should_change_PhotometricInterpretation_to_RGB = orig_fn
def time_1bit_1sample_3frame(self):
"""Time retrieval of 1-bit, 1 sample/pixel, 3 frame."""
# Slow!
for ii in range(1):
get_pixeldata(self.ds_1_1_3)
def time_large_dataset(self):
"""Time reading pixel data from a large dataset."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_16_3_100)
def time_32bit_3sample_2frame(self):
"""Time retrieval of 32-bit, 3 sample/pixel, 2 frame."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_32_3_2)
def time_32bit_1sample_15frame(self):
"""Time retrieval of 32-bit, 1 sample/pixel, 15 frame."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_32_1_15)
def time_16bit_3sample_1frame(self):
"""Time retrieval of 16-bit, 3 sample/pixel, 1 frame."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_16_3_1)
def test_unknown_pixel_representation_raises(self):
"""Test get_pixeldata raises if unsupported PixelRepresentation."""
ds = dcmread(EXPL_16_1_1F)
ds.PixelRepresentation = 2
with pytest.raises(ValueError, match=r"value of '2' for '\(0028,0103"):
get_pixeldata(ds)
def time_large_dataset(self):
"""Time reading pixel data from a large dataset."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_16_3_100)
def time_32bit_1sample_15frame(self):
"""Time retrieval of 32-bit, 1 sample/pixel, 15 frame."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_32_1_15)
def time_16bit_3sample_2frame(self):
"""Time retrieval of 16-bit, 3 sample/pixel, 2 frame."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_16_3_2)
def time_16bit_1sample_10frame(self):
"""Time retrieval of 16-bit, 1 sample/pixel, 10 frame."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_16_1_10)
def time_8bit_3sample_1frame(self):
"""Time retrieval of 8-bit, 3 sample/pixel, 1 frame."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_8_3_1)
def time_8bit_1sample_2frame(self):
"""Time retrieval of 8-bit, 1 sample/pixel, 2 frame."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_8_1_2)
def time_8bit_1sample_2frame(self):
"""Time retrieval of 8-bit, 1 sample/pixel, 2 frame."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_8_1_2)
def time_ybr_422(self):
"""Time retrieval of YBR_FULL_422 data."""
for ii in range(self.no_runs):
get_pixeldata(self.ds_ybr_422)
