def _cmp(self, filename, shape, ch_shape, reader_1, reader_2, outname,
ext):
data_dict = {"img": filename}
keys = data_dict.keys()
xforms = Compose(
[LoadImaged(keys, reader=reader_1, ensure_channel_first=True)])
img_dict = xforms(data_dict) # load dicom with itk
self.assertTupleEqual(img_dict["img"].shape, ch_shape)
self.assertTupleEqual(
tuple(img_dict[PostFix.meta("img")]["spatial_shape"]), shape)
with tempfile.TemporaryDirectory() as tempdir:
save_xform = SaveImageD(keys,
meta_keys=PostFix.meta("img"),
output_dir=tempdir,
squeeze_end_dims=False,
output_ext=ext)
save_xform(img_dict) # save to nifti
new_xforms = Compose(
[LoadImaged(keys, reader=reader_2),
EnsureChannelFirstD(keys)])
out = new_xforms({"img":
os.path.join(tempdir,
outname)}) # load nifti with itk
self.assertTupleEqual(out["img"].shape, ch_shape)
self.assertTupleEqual(
tuple(out[PostFix.meta("img")]["spatial_shape"]), shape)
if "affine" in img_dict[PostFix.meta("img")] and "affine" in out[
PostFix.meta("img")]:
np.testing.assert_allclose(
img_dict[PostFix.meta("img")]["affine"],
out[PostFix.meta("img")]["affine"],
rtol=1e-3)
np.testing.assert_allclose(out["img"], img_dict["img"], rtol=1e-3)
def setUp(self):
if not has_nib:
self.skipTest("nibabel required for test_inverse")
set_determinism(seed=0)
b_size = 11
im_fname, seg_fname = (make_nifti_image(i)
for i in create_test_image_3d(101, 100, 107))
load_ims = Compose([LoadImaged(KEYS), AddChanneld(KEYS)])
self.data_3d = [
load_ims({
"image": im_fname,
"label": seg_fname
}) for _ in range(b_size)
]
b_size = 8
im_fname, seg_fname = (
make_nifti_image(i)
for i in create_test_image_2d(62, 37, rad_max=10))
load_ims = Compose([LoadImaged(KEYS), AddChanneld(KEYS)])
self.data_2d = [
load_ims({
"image": im_fname,
"label": seg_fname
}) for _ in range(b_size)
]
self.batch_size = 7
def test_no_file(self):
with self.assertRaises(RuntimeError):
LoadImaged(keys="img", image_only=True)({"img": "unknown"})
with self.assertRaises(RuntimeError):
LoadImaged(keys="img", reader="nibabelreader", image_only=True)({
"img":
"unknown"
})
def test_values(self):
testing_dir = os.path.join(os.path.dirname(os.path.realpath(__file__)),
"testing_data")
train_transform = Compose([
LoadImaged(keys=["image", "label"]),
AddChanneld(keys=["image", "label"]),
ScaleIntensityd(keys="image"),
ToTensord(keys=["image", "label"]),
])
val_transform = LoadImaged(keys=["image", "label"])
def _test_dataset(dataset):
self.assertEqual(len(dataset), 52)
self.assertTrue("image" in dataset[0])
self.assertTrue("label" in dataset[0])
self.assertTrue("image_meta_dict" in dataset[0])
self.assertTupleEqual(dataset[0]["image"].shape, (1, 34, 49, 41))
cvdataset = CrossValidation(
dataset_cls=DecathlonDataset,
nfolds=5,
seed=12345,
root_dir=testing_dir,
task="Task04_Hippocampus",
section="validation",
transform=train_transform,
download=True,
)
try: # will start downloading if testing_dir doesn't have the Decathlon files
data = cvdataset.get_dataset(folds=0)
except (ContentTooShortError, HTTPError, RuntimeError) as e:
print(str(e))
if isinstance(e, RuntimeError):
# FIXME: skip MD5 check as current downloading method may fail
self.assertTrue(str(e).startswith("md5 check"))
return # skipping this test due the network connection errors
_test_dataset(data)
# test training data for fold [1, 2, 3, 4] of 5 splits
data = cvdataset.get_dataset(folds=[1, 2, 3, 4])
self.assertTupleEqual(data[0]["image"].shape, (1, 35, 52, 33))
self.assertEqual(len(data), 208)
# test train / validation for fold 4 of 5 splits
data = cvdataset.get_dataset(folds=[4],
transform=val_transform,
download=False)
# val_transform doesn't add the channel dim to shape
self.assertTupleEqual(data[0]["image"].shape, (38, 53, 30))
self.assertEqual(len(data), 52)
data = cvdataset.get_dataset(folds=[0, 1, 2, 3])
self.assertTupleEqual(data[0]["image"].shape, (1, 34, 49, 41))
self.assertEqual(len(data), 208)
def test_channel_dim(self):
spatial_size = (32, 64, 3, 128)
test_image = np.random.rand(*spatial_size)
with tempfile.TemporaryDirectory() as tempdir:
filename = os.path.join(tempdir, "test_image.nii.gz")
nib.save(nib.Nifti1Image(test_image, affine=np.eye(4)), filename)
loader = LoadImaged(keys="img")
loader.register(ITKReader(channel_dim=2))
result = EnsureChannelFirstD("img")(loader({"img": filename}))
self.assertTupleEqual(tuple(result["img_meta_dict"]["spatial_shape"]), (32, 64, 128))
self.assertTupleEqual(result["img"].shape, (3, 32, 64, 128))
def transformations():
train_transforms = Compose([
LoadImaged(keys=['image', 'label']),
AddChanneld(keys=['image', 'label']),
ToTensord(keys=['image', 'label'])
])
val_transforms = Compose([
LoadImaged(keys=['image', 'label']),
AddChanneld(keys=['image', 'label']),
ToTensord(keys=['image', 'label'])
])
return train_transforms, val_transforms
def test_channel_dim(self):
spatial_size = (32, 64, 3, 128)
test_image = np.random.rand(*spatial_size)
with tempfile.TemporaryDirectory() as tempdir:
filename = os.path.join(tempdir, "test_image.nii.gz")
nib.save(nib.Nifti1Image(test_image, affine=np.eye(4)), filename)
loader = LoadImaged(keys="img", image_only=True)
loader.register(ITKReader(channel_dim=2))
t = Compose([EnsureChannelFirstD("img"), FromMetaTensord("img")])
result = t(loader({"img": filename}))
self.assertTupleEqual(result["img"].shape, (3, 32, 64, 128))
def test_register(self):
spatial_size = (32, 64, 128)
test_image = np.random.rand(*spatial_size)
with tempfile.TemporaryDirectory() as tempdir:
filename = os.path.join(tempdir, "test_image.nii.gz")
itk_np_view = itk.image_view_from_array(test_image)
itk.imwrite(itk_np_view, filename)
loader = LoadImaged(keys="img", image_only=True)
loader.register(ITKReader())
result = loader({"img": Path(filename)})
self.assertTupleEqual(result["img"].shape, spatial_size[::-1])
def load_img_and_sample_ddf():
# load image
img = LoadImaged(keys="img")({"img": FILE_PATH})["img"]
# W, H, D -> D, H, W
img = img.transpose((2, 1, 0))
# randomly sample ddf such that maximum displacement in each direction equals to one-tenth of the image dimension in
# that direction.
ddf = np.random.random((3, *img.shape)).astype(np.float32) # (3, D, H, W)
ddf[0] = ddf[0] * img.shape[0] * 0.1
ddf[1] = ddf[1] * img.shape[1] * 0.1
ddf[2] = ddf[2] * img.shape[2] * 0.1
return img, ddf
def test_shape(self, expected_shape):
test_image = nib.Nifti1Image(
np.random.randint(0, 2, size=[128, 128, 128]), np.eye(4))
with tempfile.TemporaryDirectory() as tempdir:
nib.save(test_image, os.path.join(tempdir, "test_image1.nii.gz"))
nib.save(test_image, os.path.join(tempdir, "test_label1.nii.gz"))
nib.save(test_image, os.path.join(tempdir, "test_extra1.nii.gz"))
nib.save(test_image, os.path.join(tempdir, "test_image2.nii.gz"))
nib.save(test_image, os.path.join(tempdir, "test_label2.nii.gz"))
nib.save(test_image, os.path.join(tempdir, "test_extra2.nii.gz"))
test_data = [
{
"image": os.path.join(tempdir, "test_image1.nii.gz"),
"label": os.path.join(tempdir, "test_label1.nii.gz"),
"extra": os.path.join(tempdir, "test_extra1.nii.gz"),
},
{
"image": os.path.join(tempdir, "test_image2.nii.gz"),
"label": os.path.join(tempdir, "test_label2.nii.gz"),
"extra": os.path.join(tempdir, "test_extra2.nii.gz"),
},
]
test_transform = Compose([
LoadImaged(keys=["image", "label", "extra"]),
SimulateDelayd(keys=["image", "label", "extra"],
delay_time=[1e-7, 1e-6, 1e-5]),
])
dataset = Dataset(data=test_data, transform=test_transform)
data1 = dataset[0]
data2 = dataset[1]
self.assertTupleEqual(data1["image"].shape, expected_shape)
self.assertTupleEqual(data1["label"].shape, expected_shape)
self.assertTupleEqual(data1["extra"].shape, expected_shape)
self.assertTupleEqual(data2["image"].shape, expected_shape)
self.assertTupleEqual(data2["label"].shape, expected_shape)
self.assertTupleEqual(data2["extra"].shape, expected_shape)
dataset = Dataset(
data=test_data,
transform=LoadImaged(keys=["image", "label", "extra"]))
data1_simple = dataset[0]
data2_simple = dataset[1]
self.assertTupleEqual(data1_simple["image"].shape, expected_shape)
self.assertTupleEqual(data1_simple["label"].shape, expected_shape)
self.assertTupleEqual(data1_simple["extra"].shape, expected_shape)
self.assertTupleEqual(data2_simple["image"].shape, expected_shape)
self.assertTupleEqual(data2_simple["label"].shape, expected_shape)
self.assertTupleEqual(data2_simple["extra"].shape, expected_shape)
def test_values(self):
testing_dir = os.path.join(os.path.dirname(os.path.realpath(__file__)),
"testing_data")
train_transform = Compose([
LoadImaged(keys=["image", "label"]),
AddChanneld(keys=["image", "label"]),
ScaleIntensityd(keys="image"),
ToTensord(keys=["image", "label"]),
])
val_transform = LoadImaged(keys=["image", "label"])
def _test_dataset(dataset):
self.assertEqual(len(dataset), 52)
self.assertTrue("image" in dataset[0])
self.assertTrue("label" in dataset[0])
self.assertTrue(PostFix.meta("image") in dataset[0])
self.assertTupleEqual(dataset[0]["image"].shape, (1, 34, 49, 41))
cvdataset = CrossValidation(
dataset_cls=DecathlonDataset,
nfolds=5,
seed=12345,
root_dir=testing_dir,
task="Task04_Hippocampus",
section="validation",
transform=train_transform,
download=True,
)
with skip_if_downloading_fails():
data = cvdataset.get_dataset(folds=0)
_test_dataset(data)
# test training data for fold [1, 2, 3, 4] of 5 splits
data = cvdataset.get_dataset(folds=[1, 2, 3, 4])
self.assertTupleEqual(data[0]["image"].shape, (1, 35, 52, 33))
self.assertEqual(len(data), 208)
# test train / validation for fold 4 of 5 splits
data = cvdataset.get_dataset(folds=[4],
transform=val_transform,
download=False)
# val_transform doesn't add the channel dim to shape
self.assertTupleEqual(data[0]["image"].shape, (38, 53, 30))
self.assertEqual(len(data), 52)
data = cvdataset.get_dataset(folds=[0, 1, 2, 3])
self.assertTupleEqual(data[0]["image"].shape, (1, 34, 49, 41))
self.assertEqual(len(data), 208)
def test_linear_consistent_dict(self, xform_cls, input_dict, atol):
"""xform cls testing itk consistency"""
img = LoadImaged(keys, image_only=True, simple_keys=True)({
keys[0]:
FILE_PATH,
keys[1]:
FILE_PATH_1
})
img = EnsureChannelFirstd(keys)(img)
ref_1 = {k: _create_itk_obj(img[k][0], img[k].affine) for k in keys}
output = self.run_transform(img, xform_cls, input_dict)
ref_2 = {
k: _create_itk_obj(output[k][0], output[k].affine)
for k in keys
}
expected = {k: _resample_to_affine(ref_1[k], ref_2[k]) for k in keys}
# compare ref_2 and expected results from itk
diff = {
k: np.abs(
itk.GetArrayFromImage(ref_2[k]) -
itk.GetArrayFromImage(expected[k]))
for k in keys
}
avg_diff = {k: np.mean(diff[k]) for k in keys}
for k in keys:
self.assertTrue(avg_diff[k] < atol,
f"{xform_cls} avg_diff: {avg_diff}, tol: {atol}")
def pre_transforms(self, data):
return [
LoadImaged(keys=["image", "label"]),
EnsureChannelFirstd(keys=["image", "label"]),
AddBackgroundScribblesFromROId(
scribbles="label",
scribbles_bg_label=self.scribbles_bg_label,
scribbles_fg_label=self.scribbles_fg_label,
),
# at the moment optimisers are bottleneck taking a long time,
# therefore scaling non-isotropic with big spacing
Spacingd(keys=["image", "label"], pixdim=self.pix_dim, mode=["bilinear", "nearest"]),
Orientationd(keys=["image", "label"], axcodes="RAS"),
ScaleIntensityRanged(
keys="image",
a_min=self.intensity_range[0],
a_max=self.intensity_range[1],
b_min=self.intensity_range[2],
b_max=self.intensity_range[3],
clip=self.intensity_range[4],
),
MakeLikelihoodFromScribblesHistogramd(
image="image",
scribbles="label",
post_proc_label="prob",
scribbles_bg_label=self.scribbles_bg_label,
scribbles_fg_label=self.scribbles_fg_label,
normalise=True,
),
]
def __init__(
self,
root_dir,
section,
transform=LoadImaged(["image", "label"]),
cache_rate=1.0,
num_workers=0,
shuffle=False,
) -> None:
if not os.path.isdir(root_dir):
raise ValueError("Root directory root_dir must be a directory.")
self.section = section
self.shuffle = shuffle
self.val_frac = 0.2
self.set_random_state(seed=0)
dataset_dir = os.path.join(root_dir, "Task01_BrainTumour")
if not os.path.exists(dataset_dir):
raise RuntimeError(
f"Cannot find dataset directory: {dataset_dir}, please download it from Decathlon challenge."
)
data = self._generate_data_list(dataset_dir)
super(DecathlonDataset, self).__init__(data,
transform,
cache_rate=cache_rate,
num_workers=num_workers)
def __init__(self, tranforms):
self.tranform_list = []
for tranform in tranforms:
if 'LoadImaged' == tranform:
self.tranform_list.append(LoadImaged(keys=["image", "label"]))
elif 'AsChannelFirstd' == tranform:
self.tranform_list.append(AsChannelFirstd(keys="image"))
elif 'ConvertToMultiChannelBasedOnBratsClassesd' == tranform:
self.tranform_list.append(ConvertToMultiChannelBasedOnBratsClassesd(keys="label"))
elif 'Spacingd' == tranform:
self.tranform_list.append(Spacingd(keys=["image", "label"], pixdim=(1.5, 1.5, 2.0), mode=("bilinear", "nearest")))
elif 'Orientationd' == tranform:
self.tranform_list.append(Orientationd(keys=["image", "label"], axcodes="RAS"))
elif 'CenterSpatialCropd' == tranform:
self.tranform_list.append(CenterSpatialCropd(keys=["image", "label"], roi_size=[128, 128, 64]))
elif 'NormalizeIntensityd' == tranform:
self.tranform_list.append(NormalizeIntensityd(keys="image", nonzero=True, channel_wise=True))
elif 'ToTensord' == tranform:
self.tranform_list.append(ToTensord(keys=["image", "label"]))
elif 'Activations' == tranform:
self.tranform_list.append(Activations(sigmoid=True))
elif 'AsDiscrete' == tranform:
self.tranform_list.append(AsDiscrete(threshold_values=True))
else:
raise ValueError(
f"Unsupported tranform: {tranform}. Please add it to support it."
)
super().__init__(self.tranform_list)
def test_samples(self):
testing_dir = os.path.join(os.path.dirname(os.path.realpath(__file__)), "testing_data")
keys = "image"
xforms = Compose(
[
LoadImaged(keys=keys),
AddChanneld(keys=keys),
ScaleIntensityd(keys=keys),
RandSpatialCropSamplesd(keys=keys, roi_size=(8, 8, 5), random_size=True, num_samples=10),
]
)
image_path = os.path.join(testing_dir, "anatomical.nii")
xforms.set_random_state(0)
ims = xforms({keys: image_path})
fig, mat = matshow3d(
[im[keys] for im in ims], title=f"testing {keys}", figsize=(2, 2), frames_per_row=5, every_n=2, show=False
)
self.assertTrue(mat.dtype == np.float32)
with tempfile.TemporaryDirectory() as tempdir:
tempimg = f"{tempdir}/matshow3d_patch_test.png"
fig.savefig(tempimg)
comp = compare_images(f"{testing_dir}/matshow3d_patch_test.png", tempimg, 5e-2, in_decorator=True)
if comp:
print("not none comp: ", comp) # matplotlib 3.2.2
np.testing.assert_allclose(comp["rms"], 30.786983, atol=1e-3, rtol=1e-3)
else:
self.assertIsNone(comp, f"value of comp={comp}") # None indicates test passed
def __init__(
self,
root_dir: str,
section: str,
transform: Union[Sequence[Callable], Callable] = (),
download: bool = False,
seed: int = 0,
val_frac: float = 0.1,
test_frac: float = 0.1,
cache_num: int = sys.maxsize,
cache_rate: float = 1.0,
num_workers: int = 0,
) -> None:
if not os.path.isdir(root_dir):
raise ValueError("Root directory root_dir must be a directory.")
self.section = section
self.val_frac = val_frac
self.test_frac = test_frac
self.set_random_state(seed=seed)
tarfile_name = os.path.join(root_dir, self.compressed_file_name)
dataset_dir = os.path.join(root_dir, self.dataset_folder_name)
if download:
download_and_extract(self.resource, tarfile_name, root_dir, self.md5)
if not os.path.exists(dataset_dir):
raise RuntimeError(
f"Cannot find dataset directory: {dataset_dir}, please use download=True to download it."
)
data = self._generate_data_list(dataset_dir)
if transform == ():
transform = LoadImaged("image")
super().__init__(data, transform, cache_num=cache_num, cache_rate=cache_rate, num_workers=num_workers)
def test_shape(self):
expected_shape = (128, 128, 128)
test_image = nib.Nifti1Image(
np.random.randint(0, 2, size=[128, 128, 128]), np.eye(4))
test_data = []
with tempfile.TemporaryDirectory() as tempdir:
for i in range(6):
nib.save(test_image,
os.path.join(tempdir, f"test_image{str(i)}.nii.gz"))
test_data.append(
{"image": os.path.join(tempdir, f"test_image{i}.nii.gz")})
test_transform = Compose([
LoadImaged(keys="image"),
SimulateDelayd(keys="image", delay_time=1e-7)
])
data_iterator = _Stream(test_data)
with self.assertRaises(TypeError): # Dataset doesn't work
dataset = Dataset(data=data_iterator, transform=test_transform)
for _ in dataset:
pass
dataset = IterableDataset(data=data_iterator,
transform=test_transform)
for d in dataset:
self.assertTupleEqual(d["image"].shape, expected_shape)
num_workers = 2 if sys.platform == "linux" else 0
dataloader = DataLoader(dataset=dataset,
batch_size=3,
num_workers=num_workers)
for d in dataloader:
self.assertTupleEqual(d["image"].shape[1:], expected_shape)
def get_data(keys):
"""Get the example data to be used.
Use MarsAtlas as it only contains 1 image for quick download and
that image is parcellated.
"""
cache_dir = os.environ.get("MONAI_DATA_DIRECTORY") or tempfile.mkdtemp()
fname = "MarsAtlas-MNI-Colin27.zip"
url = "https://www.dropbox.com/s/ndz8qtqblkciole/" + fname + "?dl=1"
out_path = os.path.join(cache_dir, "MarsAtlas-MNI-Colin27")
zip_path = os.path.join(cache_dir, fname)
download_and_extract(url, zip_path, out_path)
image, label = sorted(glob(os.path.join(out_path, "*.nii")))
data = {CommonKeys.IMAGE: image, CommonKeys.LABEL: label}
transforms = Compose([
LoadImaged(keys),
AddChanneld(keys),
ScaleIntensityd(CommonKeys.IMAGE),
Rotate90d(keys, spatial_axes=[0, 2])
])
data = transforms(data)
max_size = max(data[keys[0]].shape)
padder = SpatialPadd(keys, (max_size, max_size, max_size))
return padder(data)
def train_pre_transforms(self, context: Context):
return [
LoadImaged(keys=("image", "label")),
AddChanneld(keys=("image", "label")),
Spacingd(
keys=("image", "label"),
pixdim=(1.0, 1.0, 1.0),
mode=("bilinear", "nearest"),
),
ScaleIntensityRanged(keys="image",
a_min=-57,
a_max=164,
b_min=0.0,
b_max=1.0,
clip=True),
CropForegroundd(keys=("image", "label"), source_key="image"),
EnsureTyped(keys=("image", "label"), device=context.device),
RandCropByPosNegLabeld(
keys=("image", "label"),
label_key="label",
spatial_size=(96, 96, 96),
pos=1,
neg=1,
num_samples=4,
image_key="image",
image_threshold=0,
),
RandShiftIntensityd(keys="image", offsets=0.1, prob=0.5),
SelectItemsd(keys=("image", "label")),
]
def setUp(self):
if not has_nib:
self.skipTest("nibabel required for test_inverse")
set_determinism(seed=0)
self.all_data = {}
affine = make_rand_affine()
affine[0] *= 2
for size in [10, 11]:
# pad 5 onto both ends so that cropping can be lossless
im_1d = np.pad(np.arange(size), 5)[None]
name = "1D even" if size % 2 == 0 else "1D odd"
self.all_data[name] = {
"image": np.array(im_1d, copy=True),
"label": np.array(im_1d, copy=True),
"other": np.array(im_1d, copy=True),
}
im_2d_fname, seg_2d_fname = [make_nifti_image(i) for i in create_test_image_2d(101, 100)]
im_3d_fname, seg_3d_fname = [make_nifti_image(i, affine) for i in create_test_image_3d(100, 101, 107)]
load_ims = Compose([LoadImaged(KEYS), AddChanneld(KEYS)])
self.all_data["2D"] = load_ims({"image": im_2d_fname, "label": seg_2d_fname})
self.all_data["3D"] = load_ims({"image": im_3d_fname, "label": seg_3d_fname})
def train_pre_transforms(self, context: Context):
# Dataset preparation
t: List[Any] = [
LoadImaged(keys=("image", "label")),
AddChanneld(keys=("image", "label")),
SpatialCropForegroundd(keys=("image", "label"),
source_key="label",
spatial_size=self.roi_size),
Resized(keys=("image", "label"),
spatial_size=self.model_size,
mode=("area", "nearest")),
NormalizeIntensityd(keys="image", subtrahend=208.0,
divisor=388.0), # type: ignore
]
if self.dimension == 3:
t.append(FindAllValidSlicesd(label="label", sids="sids"))
t.extend([
AddInitialSeedPointd(label="label",
guidance="guidance",
sids="sids"),
AddGuidanceSignald(image="image", guidance="guidance"),
EnsureTyped(keys=("image", "label"), device=context.device),
SelectItemsd(keys=("image", "label", "guidance")),
])
return t
def test_decollation(self, batch_size=2, num_workers=2):
im = create_test_image_2d(100, 101)[0]
data = [{
"image": make_nifti_image(im) if has_nib else im
} for _ in range(6)]
transforms = Compose([
AddChanneld("image"),
SpatialPadd("image", 150),
RandFlipd("image", prob=1.0, spatial_axis=1),
ToTensord("image"),
])
# If nibabel present, read from disk
if has_nib:
transforms = Compose([LoadImaged("image"), transforms])
dataset = CacheDataset(data, transforms, progress=False)
loader = DataLoader(dataset,
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
for b, batch_data in enumerate(loader):
decollated_1 = decollate_batch(batch_data)
decollated_2 = Decollated()(batch_data)
for decollated in [decollated_1, decollated_2]:
for i, d in enumerate(decollated):
self.check_match(dataset[b * batch_size + i], d)
def test_register(self):
spatial_size = (32, 64, 128)
expected_shape = (128, 64, 32)
test_image = np.random.rand(*spatial_size)
with tempfile.TemporaryDirectory() as tempdir:
filename = os.path.join(tempdir, "test_image.nii.gz")
itk_np_view = itk.image_view_from_array(test_image)
itk.imwrite(itk_np_view, filename)
loader = LoadImaged(keys="img")
loader.register(ITKReader(c_order_axis_indexing=True))
result = loader({"img": filename})
self.assertTupleEqual(
tuple(result["img_meta_dict"]["spatial_shape"]),
expected_shape)
self.assertTupleEqual(result["img"].shape, spatial_size)
def test_3d_rgb(self):
testing_dir = os.path.join(os.path.dirname(os.path.realpath(__file__)), "testing_data")
keys = "image"
xforms = Compose(
[
LoadImaged(keys=keys),
AddChanneld(keys=keys),
ScaleIntensityd(keys=keys),
# change to RGB color image
RepeatChanneld(keys=keys, repeats=3),
]
)
image_path = os.path.join(testing_dir, "anatomical.nii")
ims = xforms({keys: image_path})
fig = pyplot.figure() # external figure
fig, _ = matshow3d(
volume=ims[keys],
fig=fig,
figsize=(2, 2),
frames_per_row=5,
every_n=2,
frame_dim=-1,
channel_dim=0,
show=False,
)
with tempfile.TemporaryDirectory() as tempdir:
tempimg = f"{tempdir}/matshow3d_rgb_test.png"
fig.savefig(tempimg)
comp = compare_images(f"{testing_dir}/matshow3d_rgb_test.png", tempimg, 5e-2)
self.assertIsNone(comp, f"value of comp={comp}") # None indicates test passed
def test_anisotropic_spacing(self):
with tempfile.TemporaryDirectory() as tempdir:
pixdims = [[1.0, 1.0, 5.0], [1.0, 1.0, 4.0], [1.0, 1.0, 4.5], [1.0, 1.0, 2.0], [1.0, 1.0, 1.0]]
for i in range(5):
im, seg = create_test_image_3d(32, 32, 32, num_seg_classes=1, num_objs=3, rad_max=6, channel_dim=0)
n = nib.Nifti1Image(im, np.eye(4))
n.header["pixdim"][1:4] = pixdims[i]
nib.save(n, os.path.join(tempdir, f"img{i:d}.nii.gz"))
n = nib.Nifti1Image(seg, np.eye(4))
n.header["pixdim"][1:4] = pixdims[i]
nib.save(n, os.path.join(tempdir, f"seg{i:d}.nii.gz"))
train_images = sorted(glob.glob(os.path.join(tempdir, "img*.nii.gz")))
train_labels = sorted(glob.glob(os.path.join(tempdir, "seg*.nii.gz")))
data_dicts = [
{"image": image_name, "label": label_name} for image_name, label_name in zip(train_images, train_labels)
]
t = Compose([LoadImaged(keys=["image", "label"]), FromMetaTensord(keys=["image", "label"])])
dataset = Dataset(data=data_dicts, transform=t)
calculator = DatasetSummary(dataset, num_workers=4, meta_key_postfix=PostFix.meta())
target_spacing = calculator.get_target_spacing(anisotropic_threshold=4.0, percentile=20.0)
np.testing.assert_allclose(target_spacing, (1.0, 1.0, 1.8))
def train_pre_transforms(self, context: Context):
return [
LoadImaged(keys=("image", "label"), dtype=np.uint8),
FilterImaged(keys="image", min_size=5),
AsChannelFirstd(keys="image"),
AddChanneld(keys="label"),
ToTensord(keys="image"),
TorchVisiond(keys="image",
name="ColorJitter",
brightness=64.0 / 255.0,
contrast=0.75,
saturation=0.25,
hue=0.04),
ToNumpyd(keys="image"),
RandRotate90d(keys=("image", "label"),
prob=0.5,
spatial_axes=(0, 1)),
ScaleIntensityRangeD(keys="image",
a_min=0.0,
a_max=255.0,
b_min=-1.0,
b_max=1.0),
AddInitialSeedPointExd(label="label", guidance="guidance"),
AddGuidanceSignald(image="image",
guidance="guidance",
number_intensity_ch=3),
EnsureTyped(keys=("image", "label")),
]
def test_shape(self):
expected_shape = (128, 128, 128)
test_image = nib.Nifti1Image(
np.random.randint(0, 2, size=[128, 128, 128]), np.eye(4))
test_data = list()
with tempfile.TemporaryDirectory() as tempdir:
for i in range(6):
nib.save(test_image,
os.path.join(tempdir, f"test_image{str(i)}.nii.gz"))
test_data.append({
"image":
os.path.join(tempdir, f"test_image{str(i)}.nii.gz")
})
test_transform = Compose([
LoadImaged(keys="image"),
SimulateDelayd(keys="image", delay_time=1e-7),
])
test_stream = _Stream(data=test_data,
dbpath=os.path.join(tempdir, "countDB"))
dataset = IterableDataset(data=test_stream,
transform=test_transform)
for d in dataset:
self.assertTupleEqual(d["image"].shape, expected_shape)
test_stream.reset()
dataloader = DataLoader(dataset=dataset,
batch_size=3,
num_workers=2)
for d in dataloader:
self.assertTupleEqual(d["image"].shape[1:], expected_shape)
def pre_transforms(self):
t = [
LoadImaged(keys="image", reader="nibabelreader"),
AddChanneld(keys="image"),
# Spacing might not be needed as resize transform is used later.
# Spacingd(keys="image", pixdim=self.spacing),
RandAffined(
keys="image",
prob=1,
rotate_range=(np.pi / 4, np.pi / 4, np.pi / 4),
padding_mode="zeros",
as_tensor_output=False,
),
RandFlipd(keys="image", prob=0.5, spatial_axis=0),
RandRotated(keys="image",
range_x=(-5, 5),
range_y=(-5, 5),
range_z=(-5, 5)),
Resized(keys="image", spatial_size=self.spatial_size),
]
# If using TTA for deepedit
if self.deepedit:
t.append(DiscardAddGuidanced(keys="image"))
t.append(ToTensord(keys="image"))
return Compose(t)
def test_decollation(self, *transforms):
batch_size = 2
num_workers = 2
t_compose = Compose(
[AddChanneld(KEYS),
Compose(transforms),
ToTensord(KEYS)])
# If nibabel present, read from disk
if has_nib:
t_compose = Compose([LoadImaged("image"), t_compose])
dataset = CacheDataset(self.data, t_compose, progress=False)
loader = DataLoader(dataset,
batch_size=batch_size,
shuffle=False,
num_workers=num_workers)
for b, batch_data in enumerate(loader):
decollated_1 = decollate_batch(batch_data)
decollated_2 = Decollated()(batch_data)
for decollated in [decollated_1, decollated_2]:
for i, d in enumerate(decollated):
self.check_match(dataset[b * batch_size + i], d)