def main():
parser = build_args_parser()
args = parser.parse_args()
print(args)
# Get experiment folder
experiment_path = args.name
if not os.path.isdir(experiment_path):
# If not a directory, it must be the name of the experiment.
experiment_path = pjoin(".", "experiments", args.name)
if not os.path.isdir(experiment_path):
parser.error('Cannot find experiment: {0}!'.format(args.name))
# Load experiments hyperparameters
try:
hyperparams = smartutils.load_dict_from_json_file(pjoin(experiment_path, "hyperparams.json"))
except FileNotFoundError:
hyperparams = smartutils.load_dict_from_json_file(pjoin(experiment_path, "..", "hyperparams.json"))
with Timer("Loading dataset", newline=True):
volume_manager = VolumeManager()
dataset = datasets.load_tractography_dataset([args.streamlines], volume_manager, name="dataset", use_sh_coeffs=hyperparams['use_sh_coeffs'])
print("Dataset size:", len(dataset))
with Timer("Loading model"):
model = None
if hyperparams['model'] == 'gru_regression':
from learn2track.models import GRU_Regression
model = GRU_Regression.create(experiment_path, volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_mixture':
from learn2track.models import GRU_Mixture
model = GRU_Mixture.create(experiment_path, volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_multistep':
from learn2track.models import GRU_Multistep_Gaussian
model = GRU_Multistep_Gaussian.create(experiment_path, volume_manager=volume_manager)
model.k = 1
model.m = 1
elif hyperparams['model'] == 'ffnn_regression':
from learn2track.models import FFNN_Regression
model = FFNN_Regression.create(experiment_path, volume_manager=volume_manager)
else:
raise NameError("Unknown model: {}".format(hyperparams['model']))
print(str(model))
tractogram_file = pjoin(experiment_path, args.out)
if not os.path.isfile(tractogram_file) or args.force:
if args.method == 'prediction':
tractogram = prediction_tractogram(hyperparams, model, dataset, args.batch_size, args.prediction)
elif args.method == 'evaluation':
tractogram = evaluation_tractogram(hyperparams, model, dataset, args.batch_size, args.metric)
else:
raise ValueError("Unrecognized method: {}".format(args.method))
tractogram.affine_to_rasmm = dataset.subjects[0].signal.affine
nib.streamlines.save(tractogram, tractogram_file)
else:
print("Tractogram already exists. (use --force to generate it again)")
def main():
parser = build_parser()
args = parser.parse_args()
print(args)
if min(args.keep_top) < 0:
parser.error("--keep-top must be between in [0, 1].")
# Get experiment folder
experiment_path = args.name
if not os.path.isdir(experiment_path):
# If not a directory, it must be the name of the experiment.
experiment_path = pjoin(".", "experiments", args.name)
if not os.path.isdir(experiment_path):
parser.error('Cannot find experiment: {0}!'.format(args.name))
# Load experiments hyperparameters
try:
hyperparams = smartutils.load_dict_from_json_file(
pjoin(experiment_path, "hyperparams.json"))
except FileNotFoundError:
hyperparams = smartutils.load_dict_from_json_file(
pjoin(experiment_path, "..", "hyperparams.json"))
# Use this for hyperparams added in a new version, but nonexistent from older versions
retrocompatibility_defaults = {
'feed_previous_direction': False,
'predict_offset': False,
'normalize': False,
'keep_step_size': False,
'sort_streamlines': False
}
for new_hyperparams, default_value in retrocompatibility_defaults.items():
if new_hyperparams not in hyperparams:
hyperparams[new_hyperparams] = default_value
with Timer("Loading signal data and tractogram", newline=True):
volume_manager = VolumeManager()
dataset = datasets.load_tractography_dataset_from_dwi_and_tractogram(
args.signal,
args.tractogram,
volume_manager,
use_sh_coeffs=hyperparams['use_sh_coeffs'],
bvals=args.bvals,
bvecs=args.bvecs,
step_size=args.step_size)
print("Dataset size:", len(dataset))
if vizu_available and args.vizu:
vizu.check_dataset_integrity(dataset, subset=0.2)
with Timer("Loading model"):
loss_type = args.loss_type
model = None
if hyperparams['model'] == 'gru_regression':
from learn2track.models import GRU_Regression
model = GRU_Regression.create(experiment_path,
volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_mixture':
from learn2track.models import GRU_Mixture
model = GRU_Mixture.create(experiment_path,
volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_multistep':
from learn2track.models import GRU_Multistep_Gaussian
model = GRU_Multistep_Gaussian.create(
experiment_path, volume_manager=volume_manager)
model.k = 1
model.m = 1
elif hyperparams['model'] == 'ffnn_regression':
from learn2track.models import FFNN_Regression
model = FFNN_Regression.create(experiment_path,
volume_manager=volume_manager)
if loss_type in ['l2_sum', 'l2_mean']:
loss_type = "expected_value"
else:
raise NameError("Unknown model: {}".format(hyperparams['model']))
with Timer("Building evaluation function"):
# Override K for gru_multistep
if 'k' in hyperparams:
hyperparams['k'] = 1
batch_scheduler = batch_scheduler_factory(
hyperparams,
dataset,
use_data_augment=
False, # Otherwise it doubles the number of losses :-/
train_mode=False,
batch_size_override=args.batch_size)
loss = loss_factory(hyperparams, model, dataset, loss_type=loss_type)
l2_error = views.LossView(loss=loss, batch_scheduler=batch_scheduler)
with Timer("Scoring...", newline=True):
dummy_status = Status() # Forces recomputing results
losses = l2_error.losses.view(dummy_status)
if hyperparams['model'] == 'ffnn_regression':
_losses = dataset.streamlines.copy()
_losses._data = losses.copy()
_losses._lengths -= 1
_losses._offsets -= np.arange(len(dataset.streamlines))
if args.loss_type == 'l2_sum':
losses = np.asarray([l.sum() for l in _losses])
elif args.loss_type == 'l2_mean':
losses = np.asarray([l.mean() for l in _losses])
mean = float(l2_error.mean.view(dummy_status))
stderror = float(l2_error.stderror.view(dummy_status))
print("Loss: {:.4f} ± {:.4f}".format(mean, stderror))
print("Min: {:.4f}".format(losses.min()))
print("Max: {:.4f}".format(losses.max()))
print("Percentiles: {}".format(
np.percentile(losses, [0, 25, 50, 75, 100])))
with Timer("Saving streamlines"):
nii = dataset.subjects[0].signal
tractogram = nib.streamlines.Tractogram(
dataset.streamlines[batch_scheduler.indices],
affine_to_rasmm=nii.affine)
tractogram.data_per_streamline['loss'] = losses
header = {}
header[Field.VOXEL_TO_RASMM] = nii.affine.copy()
header[Field.VOXEL_SIZES] = nii.header.get_zooms()[:3]
header[Field.DIMENSIONS] = nii.shape[:3]
header[Field.VOXEL_ORDER] = "".join(aff2axcodes(nii.affine))
nib.streamlines.save(tractogram.copy(), args.out, header=header)
if len(args.keep_top) > 0:
for keep_top in args.keep_top:
with Timer("Saving top {}% streamlines".format(keep_top)):
idx = np.argsort(losses)
idx = idx[:int(keep_top * len(losses))]
print("Keeping {}/{} streamlines".format(
len(idx), len(losses)))
sub_tractogram = tractogram[idx]
out_filename = args.out[:-4] + "_top{}".format(
keep_top) + ".tck"
nib.streamlines.save(sub_tractogram, out_filename)
def main():
parser = build_args_parser()
args = parser.parse_args()
print(args)
# Get experiment folder
experiment_path = args.name
if not os.path.isdir(experiment_path):
# If not a directory, it must be the name of the experiment.
experiment_path = pjoin(".", "experiments", args.name)
if not os.path.isdir(experiment_path):
parser.error('Cannot find experiment: {0}!'.format(args.name))
# Load experiments hyperparameters
try:
hyperparams = smartutils.load_dict_from_json_file(
pjoin(experiment_path, "hyperparams.json"))
except FileNotFoundError:
hyperparams = smartutils.load_dict_from_json_file(
pjoin(experiment_path, "..", "hyperparams.json"))
with Timer("Loading dataset", newline=True):
volume_manager = VolumeManager()
dataset = datasets.load_tractography_dataset(
[args.streamlines],
volume_manager,
name="dataset",
use_sh_coeffs=hyperparams['use_sh_coeffs'])
print("Dataset size:", len(dataset))
with Timer("Loading model"):
model = None
if hyperparams['model'] == 'gru_regression':
from learn2track.models import GRU_Regression
model = GRU_Regression.create(experiment_path,
volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_mixture':
from learn2track.models import GRU_Mixture
model = GRU_Mixture.create(experiment_path,
volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_multistep':
from learn2track.models import GRU_Multistep_Gaussian
model = GRU_Multistep_Gaussian.create(
experiment_path, volume_manager=volume_manager)
model.k = 1
model.m = 1
elif hyperparams['model'] == 'ffnn_regression':
from learn2track.models import FFNN_Regression
model = FFNN_Regression.create(experiment_path,
volume_manager=volume_manager)
else:
raise NameError("Unknown model: {}".format(hyperparams['model']))
print(str(model))
tractogram_file = pjoin(experiment_path, args.out)
if not os.path.isfile(tractogram_file) or args.force:
if args.method == 'prediction':
tractogram = prediction_tractogram(hyperparams, model, dataset,
args.batch_size,
args.prediction)
elif args.method == 'evaluation':
tractogram = evaluation_tractogram(hyperparams, model, dataset,
args.batch_size, args.metric)
else:
raise ValueError("Unrecognized method: {}".format(args.method))
tractogram.affine_to_rasmm = dataset.subjects[0].signal.affine
nib.streamlines.save(tractogram, tractogram_file)
else:
print("Tractogram already exists. (use --force to generate it again)")
def main():
parser = build_parser()
args = parser.parse_args()
print(args)
# Get experiment folder
experiment_path = args.name
if not os.path.isdir(experiment_path):
# If not a directory, it must be the name of the experiment.
experiment_path = pjoin(".", "experiments", args.name)
if not os.path.isdir(experiment_path):
parser.error('Cannot find experiment: {0}!'.format(args.name))
# Load experiments hyperparameters
try:
hyperparams = smartutils.load_dict_from_json_file(pjoin(experiment_path, "hyperparams.json"))
except FileNotFoundError:
hyperparams = smartutils.load_dict_from_json_file(pjoin(experiment_path, "..", "hyperparams.json"))
with Timer("Loading dataset", newline=True):
volume_manager = VolumeManager()
dataset = datasets.load_tractography_dataset(args.subjects, volume_manager, name="dataset", use_sh_coeffs=hyperparams['use_sh_coeffs'])
print("Dataset size:", len(dataset))
with Timer("Loading model"):
model = None
if hyperparams['model'] == 'gru_regression':
from learn2track.models import GRU_Regression
model = GRU_Regression.create(experiment_path, volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_mixture':
from learn2track.models import GRU_Mixture
model = GRU_Mixture.create(experiment_path, volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_multistep':
from learn2track.models import GRU_Multistep_Gaussian
model = GRU_Multistep_Gaussian.create(experiment_path, volume_manager=volume_manager)
model.k = 1
model.m = 1
elif hyperparams['model'] == 'ffnn_regression':
from learn2track.models import FFNN_Regression
model = FFNN_Regression.create(experiment_path, volume_manager=volume_manager)
else:
raise NameError("Unknown model: {}".format(hyperparams['model']))
with Timer("Building evaluation function"):
# Override K for gru_multistep
if 'k' in hyperparams:
hyperparams['k'] = 1
batch_scheduler = batch_scheduler_factory(hyperparams, dataset, train_mode=False, batch_size_override=args.batch_size)
loss = loss_factory(hyperparams, model, dataset, loss_type=args.loss_type)
l2_error = views.LossView(loss=loss, batch_scheduler=batch_scheduler)
with Timer("Evaluating...", newline=True):
results_file = pjoin(experiment_path, "results.json")
results = {}
if os.path.isfile(results_file) and not args.force:
print("Loading saved results... (use --force to re-run evaluation)")
results = smartutils.load_dict_from_json_file(results_file)
tag = ""
if args.loss_type == 'expected_value' or hyperparams['model'] == 'gru_regression':
tag = "_EV_L2_error"
elif args.loss_type == 'maximum_component':
tag = "_MC_L2_error"
elif hyperparams['model'] == 'gru_mixture' or hyperparams['model'] == 'gru_multistep':
tag = "_NLL"
entry = args.dataset_name + tag
if entry not in results or args.force:
with Timer("Evaluating {}".format(entry)):
dummy_status = Status() # Forces recomputing results
results[entry] = {'mean': float(l2_error.mean.view(dummy_status)), 'stderror': float(l2_error.stderror.view(dummy_status))}
smartutils.save_dict_to_json_file(results_file, results) # Update results file.
print("{}: {:.4f} ± {:.4f}".format(entry, results[entry]['mean'], results[entry]['stderror']))
def main():
parser = build_parser()
args = parser.parse_args()
print(args)
# Get experiment folder
experiment_path = args.name
if not os.path.isdir(experiment_path):
# If not a directory, it must be the name of the experiment.
experiment_path = pjoin(".", "experiments", args.name)
if not os.path.isdir(experiment_path):
parser.error('Cannot find experiment: {0}!'.format(args.name))
# Load experiments hyperparameters
try:
hyperparams = smartutils.load_dict_from_json_file(
pjoin(experiment_path, "hyperparams.json"))
except FileNotFoundError:
hyperparams = smartutils.load_dict_from_json_file(
pjoin(experiment_path, "..", "hyperparams.json"))
# Use this for hyperparams added in a new version, but nonexistent from older versions
retrocompatibility_defaults = {
'feed_previous_direction': False,
'predict_offset': False,
'normalize': False,
'keep_step_size': False,
'sort_streamlines': False,
'use_layer_normalization': False,
'drop_prob': 0.,
'use_zoneout': False
}
for new_hyperparams, default_value in retrocompatibility_defaults.items():
if new_hyperparams not in hyperparams:
hyperparams[new_hyperparams] = default_value
with Timer("Loading dataset", newline=True):
volume_manager = VolumeManager()
dataset = datasets.load_tractography_dataset(
args.subjects,
volume_manager,
name="dataset",
use_sh_coeffs=hyperparams['use_sh_coeffs'])
print("Dataset size:", len(dataset))
with Timer("Loading model"):
model = None
if hyperparams['model'] == 'gru_regression':
from learn2track.models import GRU_Regression
model = GRU_Regression.create(experiment_path,
volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_gaussian':
from learn2track.models import GRU_Gaussian
model = GRU_Gaussian.create(experiment_path,
volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_mixture':
from learn2track.models import GRU_Mixture
model = GRU_Mixture.create(experiment_path,
volume_manager=volume_manager)
elif hyperparams['model'] == 'gru_multistep':
from learn2track.models import GRU_Multistep_Gaussian
model = GRU_Multistep_Gaussian.create(
experiment_path, volume_manager=volume_manager)
model.k = 1
model.m = 1
elif hyperparams['model'] == 'ffnn_regression':
from learn2track.models import FFNN_Regression
model = FFNN_Regression.create(experiment_path,
volume_manager=volume_manager)
else:
raise NameError("Unknown model: {}".format(hyperparams['model']))
model.drop_prob = 0. # Make sure dropout/zoneout is not used when testing
with Timer("Building evaluation function"):
# Override K for gru_multistep
if 'k' in hyperparams:
hyperparams['k'] = 1
batch_scheduler = batch_scheduler_factory(
hyperparams,
dataset,
train_mode=False,
batch_size_override=args.batch_size)
loss = loss_factory(hyperparams,
model,
dataset,
loss_type=args.loss_type)
l2_error = views.LossView(loss=loss, batch_scheduler=batch_scheduler)
with Timer("Evaluating...", newline=True):
results_file = pjoin(experiment_path, "results.json")
results = {}
if os.path.isfile(results_file) and not args.force:
print(
"Loading saved results... (use --force to re-run evaluation)")
results = smartutils.load_dict_from_json_file(results_file)
tag = ""
if args.loss_type == 'expected_value' or hyperparams[
'model'] == 'gru_regression':
tag = "_EV_L2_error"
elif args.loss_type == 'maximum_component':
tag = "_MC_L2_error"
elif hyperparams['model'] in [
'gru_gaussian', 'gru_mixture', 'gru_multistep'
]:
tag = "_NLL"
entry = args.dataset_name + tag
if entry not in results or args.force:
with Timer("Evaluating {}".format(entry)):
dummy_status = Status() # Forces recomputing results
results[entry] = {
'mean': float(l2_error.mean.view(dummy_status)),
'stderror': float(l2_error.stderror.view(dummy_status))
}
smartutils.save_dict_to_json_file(
results_file, results) # Update results file.
print("{}: {:.4f} ± {:.4f}".format(entry, results[entry]['mean'],
results[entry]['stderror']))
