def get_image_sample_transforms(self) -> ModelTransformsPerExecutionMode:
if self.use_combined_model:
return ModelTransformsPerExecutionMode(
train=ScalarItemAugmentation(
transform=RandAugmentSlice(use_joint_channel_transformation=False,
is_transformation_for_segmentation_maps=True)))
else:
return ModelTransformsPerExecutionMode()
def get_image_sample_transforms(self) -> ModelTransformsPerExecutionMode:
"""
Get transforms to perform on image samples for each model execution mode.
"""
return ModelTransformsPerExecutionMode(
train=ScalarItemAugmentation(
RandAugmentSlice(is_transformation_for_segmentation_maps=(
self.imaging_feature_type == ImagingFeatureType.Segmentation
or self.imaging_feature_type == ImagingFeatureType.ImageAndSegmentation))))
def test_image_encoder(test_output_dirs: OutputFolderForTests,
encode_channels_jointly: bool,
use_non_imaging_features: bool,
kernel_size_per_encoding_block: Optional[Union[TupleInt3, List[TupleInt3]]],
stride_size_per_encoding_block: Optional[Union[TupleInt3, List[TupleInt3]]],
reduction_factor: float,
expected_num_reduced_features: int,
aggregation_type: AggregationType) -> None:
"""
Test if the image encoder networks can be trained without errors (including GradCam computation and data
augmentation).
"""
logging_to_stdout()
set_random_seed(0)
dataset_folder = Path(test_output_dirs.make_sub_dir("dataset"))
scan_size = (6, 64, 60)
scan_files: List[str] = []
for s in range(4):
random_scan = np.random.uniform(0, 1, scan_size)
scan_file_name = f"scan{s + 1}{NumpyFile.NUMPY.value}"
np.save(str(dataset_folder / scan_file_name), random_scan)
scan_files.append(scan_file_name)
dataset_contents = """subject,channel,path,label,numerical1,numerical2,categorical1,categorical2
S1,week0,scan1.npy,,1,10,Male,Val1
S1,week1,scan2.npy,True,2,20,Female,Val2
S2,week0,scan3.npy,,3,30,Female,Val3
S2,week1,scan4.npy,False,4,40,Female,Val1
S3,week0,scan1.npy,,5,50,Male,Val2
S3,week1,scan3.npy,True,6,60,Male,Val2
"""
(dataset_folder / "dataset.csv").write_text(dataset_contents)
numerical_columns = ["numerical1", "numerical2"] if use_non_imaging_features else []
categorical_columns = ["categorical1", "categorical2"] if use_non_imaging_features else []
non_image_feature_channels = get_non_image_features_dict(default_channels=["week1", "week0"],
specific_channels={"categorical2": ["week1"]}) \
if use_non_imaging_features else {}
config_for_dataset = ScalarModelBase(
local_dataset=dataset_folder,
image_channels=["week0", "week1"],
image_file_column="path",
label_channels=["week1"],
label_value_column="label",
non_image_feature_channels=non_image_feature_channels,
numerical_columns=numerical_columns,
categorical_columns=categorical_columns,
should_validate=False
)
config_for_dataset.read_dataset_into_dataframe_and_pre_process()
dataset = ScalarDataset(config_for_dataset,
sample_transforms=ScalarItemAugmentation(
RandAugmentSlice(is_transformation_for_segmentation_maps=False)))
assert len(dataset) == 3
config = ImageEncoder(
encode_channels_jointly=encode_channels_jointly,
should_validate=False,
numerical_columns=numerical_columns,
categorical_columns=categorical_columns,
non_image_feature_channels=non_image_feature_channels,
categorical_feature_encoder=config_for_dataset.categorical_feature_encoder,
encoder_dimensionality_reduction_factor=reduction_factor,
aggregation_type=aggregation_type,
scan_size=(6, 64, 60)
)
if kernel_size_per_encoding_block:
config.kernel_size_per_encoding_block = kernel_size_per_encoding_block
if stride_size_per_encoding_block:
config.stride_size_per_encoding_block = stride_size_per_encoding_block
config.set_output_to(test_output_dirs.root_dir)
config.max_batch_grad_cam = 1
model = create_model_with_temperature_scaling(config)
input_size: List[Tuple] = [(len(config.image_channels), *scan_size)]
if use_non_imaging_features:
input_size.append((config.get_total_number_of_non_imaging_features(),))
# Original number output channels (unreduced) is
# num initial channel * (num encoder block - 1) = 4 * (3-1) = 8
if encode_channels_jointly:
# reduced_num_channels + num_non_img_features
assert model.final_num_feature_channels == expected_num_reduced_features + \
config.get_total_number_of_non_imaging_features()
else:
# num_img_channels * reduced_num_channels + num_non_img_features
assert model.final_num_feature_channels == len(config.image_channels) * expected_num_reduced_features + \
config.get_total_number_of_non_imaging_features()
summarizer = ModelSummary(model)
summarizer.generate_summary(input_sizes=input_size)
config.local_dataset = dataset_folder
config.validate()
model_train(config, checkpoint_handler=get_default_checkpoint_handler(model_config=config,
project_root=Path(test_output_dirs.root_dir)))