Python Dataset.is_implicit_VR方法代码示例

# 需要导入模块: from pydicom.dataset import Dataset [as 别名]
# 或者: from pydicom.dataset.Dataset import is_implicit_VR [as 别名]
 def test_save_as(self):
     """Test Dataset.save_as"""
     fp = DicomBytesIO()
     ds = Dataset()
     ds.PatientName = 'CITIZEN'
     # Raise AttributeError if is_implicit_VR or is_little_endian missing
     self.assertRaises(
         AttributeError,
         ds.save_as,
         fp,
         write_like_original=False)
     ds.is_implicit_VR = True
     self.assertRaises(
         AttributeError,
         ds.save_as,
         fp,
         write_like_original=False)
     ds.is_little_endian = True
     del ds.is_implicit_VR
     self.assertRaises(
         AttributeError,
         ds.save_as,
         fp,
         write_like_original=False)
     ds.is_implicit_VR = True
     ds.file_meta = Dataset()
     ds.file_meta.MediaStorageSOPClassUID = '1.1'
     ds.file_meta.MediaStorageSOPInstanceUID = '1.2'
     ds.file_meta.TransferSyntaxUID = '1.3'
     ds.file_meta.ImplementationClassUID = '1.4'
     ds.save_as(fp, write_like_original=False)

# 需要导入模块: from pydicom.dataset import Dataset [as 别名]
# 或者: from pydicom.dataset.Dataset import is_implicit_VR [as 别名]
    def test_is_original_encoding(self):
        """Test Dataset.write_like_original"""
        ds = Dataset()
        assert not ds.is_original_encoding

        # simulate reading
        ds.SpecificCharacterSet = 'ISO_IR 100'
        ds.read_little_endian = True
        ds.read_implicit_vr = True
        ds.read_encoding = ['latin_1', 'latin_1', 'latin_1']
        assert not ds.is_original_encoding

        ds.is_little_endian = True
        ds.is_implicit_VR = True
        assert ds.is_original_encoding
        # changed character set
        ds.SpecificCharacterSet = 'ISO_IR 192'
        assert not ds.is_original_encoding
        # back to original character set
        ds.SpecificCharacterSet = 'ISO_IR 100'
        assert ds.is_original_encoding
        ds.is_little_endian = False
        assert not ds.is_original_encoding
        ds.is_little_endian = True
        ds.is_implicit_VR = False
        assert not ds.is_original_encoding

# 需要导入模块: from pydicom.dataset import Dataset [as 别名]
# 或者: from pydicom.dataset.Dataset import is_implicit_VR [as 别名]
 def new_data_set(tags):
     """ Create a DICOM data set with the given attributes """
     tags = tags or {}
     data_set = Dataset()
     for tag_name, value in tags.items():
         setattr(data_set, tag_name, value)
     data_set.file_meta = Dataset()
     data_set.is_implicit_VR = False
     data_set.is_little_endian = True
     return data_set

# 需要导入模块: from pydicom.dataset import Dataset [as 别名]
# 或者: from pydicom.dataset.Dataset import is_implicit_VR [as 别名]
    def test_overlay(self):
        """Test correcting OverlayData"""
        # Implicit VR must be 'OW'
        ref_ds = Dataset()
        ref_ds.is_implicit_VR = True
        ref_ds.add(DataElement(0x60003000, 'OB or OW', b'\x00'))
        ref_ds.add(DataElement(0x601E3000, 'OB or OW', b'\x00'))
        ds = correct_ambiguous_vr(deepcopy(ref_ds), True)
        self.assertTrue(ds[0x60003000].VR == 'OW')
        self.assertTrue(ds[0x601E3000].VR == 'OW')
        self.assertTrue(ref_ds[0x60003000].VR == 'OB or OW')
        self.assertTrue(ref_ds[0x601E3000].VR == 'OB or OW')

        # Explicit VR may be 'OB' or 'OW' (leave unchanged)
        ref_ds.is_implicit_VR = False
        ds = correct_ambiguous_vr(deepcopy(ref_ds), True)
        self.assertTrue(ds[0x60003000].VR == 'OB or OW')
        self.assertTrue(ref_ds[0x60003000].VR == 'OB or OW')

        # Missing is_implicit_VR (leave unchanged)
        del ref_ds.is_implicit_VR
        ds = correct_ambiguous_vr(deepcopy(ref_ds), True)
        self.assertTrue(ds[0x60003000].VR == 'OB or OW')
        self.assertTrue(ref_ds[0x60003000].VR == 'OB or OW')

# 需要导入模块: from pydicom.dataset import Dataset [as 别名]
# 或者: from pydicom.dataset.Dataset import is_implicit_VR [as 别名]
def _create_temporary_dataset(shape=(100, 1024, 1024, 3), bit_depth=16):
    """Function to create a temporary dataset for use in testing.

    Parameters
    ----------
    shape : 4-tuple
        The (frames, rows, columns, channels) of the test dataset.
    bit_depth : int
        The BitsAllocated value to use for the dataset, one of 8, 16, 32, 64.

    Returns
    -------
    tempfile.TemporaryFile
        A created DICOM File Format conformant dataset.
    """
    ds = Dataset()
    ds.is_little_endian = True
    ds.is_implicit_VR = False
    ds.file_meta = Dataset()
    ds.file_meta.TransferSyntaxUID = ExplicitVRLittleEndian
    ds.SOPClassUID = '1.2.3.4'
    ds.SOPInstanceUID = generate_uid()
    ds.BitsAllocated = bit_depth
    ds.PixelRepresentation = 0
    ds.PlanarConfiguration = 0
    ds.Rows = shape[1]
    ds.Columns = shape[2]
    ds.NumberOfFrames = shape[0]
    ds.SamplesPerPixel = shape[3]
    if shape[3] == 1:
        ds.PhotometricInterpretation = 'MONOCHROME2'
    elif shape[3] == 3:
        ds.PhotometricInterpretation = 'RGB'

    arr = np.zeros(shape, dtype='uint{}'.format(bit_depth))
    ds.PixelData = arr.tobytes()

    if len(ds.PixelData) % 2:
        ds.PixelData += b'\x00'

    tfile = TemporaryFile(mode='w+b')
    ds.save_as(tfile, write_like_original=False)
    tfile.seek(0)

    return tfile