def imshow_with_label_overlay(ax,
image,
label,
channel=None,
axis=None,
slice=None,
im_cmap="gray",
lab_cmap=None,
lab_alpha=0.7):
"""
Imshow an image of dim 2 or dim 3 with labels overlayed on a single ax
Args:
ax:
image:
label:
channel:
axis:
im_cmap:
lab_cmap:
lab_alpha:
Returns:
"""
from MultiPlanarUNet.utils import pred_to_class
# Plot the image
channel, axis, slice = imshow(ax, image, channel, axis, slice, im_cmap)
# Get int labels if needed, otherwise returns identity
img_dims = image.ndim - 1
label = pred_to_class(label, img_dims=img_dims, has_batch_dim=False)
# Move the chosen axis forward
label = np.moveaxis(label, axis, 0)
if img_dims == 3:
lab_slice = label[slice]
else:
lab_slice = label
# Overlay masked label image
masked_lab = np.ma.masked_where(lab_slice == 0, lab_slice)
# Imshow labels
ax.imshow(masked_lab, alpha=lab_alpha, cmap=lab_cmap)
return channel, axis, slice
def entry_func(args=None):
# Get command line arguments
args = vars(get_argparser().parse_args(args))
base_dir = os.path.abspath(args["project_dir"])
_file = args["f"]
label = args["l"]
N_extra = args["extra"]
try:
N_extra = int(N_extra)
except ValueError:
pass
# Get settings from YAML file
from MultiPlanarUNet.train.hparams import YAMLHParams
hparams = YAMLHParams(os.path.join(base_dir, "train_hparams.yaml"))
# Set strides
hparams["fit"]["strides"] = args["strides"]
if not _file:
try:
# Data specified from command line?
data_dir = os.path.abspath(args["data_dir"])
# Set with default sub dirs
hparams["test_data"] = {
"base_dir": data_dir,
"img_subdir": "images",
"label_subdir": "labels"
}
except (AttributeError, TypeError):
data_dir = hparams["test_data"]["base_dir"]
else:
data_dir = False
out_dir = os.path.abspath(args["out_dir"])
overwrite = args["overwrite"]
predict_mode = args["no_eval"]
save_only_pred = args["save_only_pred"]
# Check if valid dir structures
validate_folders(base_dir, data_dir, out_dir, overwrite)
# Import all needed modules (folder is valid at this point)
import numpy as np
from MultiPlanarUNet.image import ImagePairLoader, ImagePair
from MultiPlanarUNet.utils import get_best_model, create_folders, \
pred_to_class, await_and_set_free_gpu, set_gpu
from MultiPlanarUNet.utils.fusion import predict_3D_patches, predict_3D_patches_binary, pred_3D_iso
from MultiPlanarUNet.logging import init_result_dict_3D, save_all_3D
from MultiPlanarUNet.evaluate import dice_all
from MultiPlanarUNet.bin.predict import save_nii_files
# Fetch GPU(s)
num_GPUs = args["num_GPUs"]
force_gpu = args["force_GPU"]
# Wait for free GPU
if force_gpu == -1:
await_and_set_free_gpu(N=num_GPUs, sleep_seconds=240)
else:
set_gpu(force_gpu)
# Read settings from the project hyperparameter file
dim = hparams["build"]["dim"]
n_classes = hparams["build"]["n_classes"]
mode = hparams["fit"]["intrp_style"]
# Set ImagePairLoader object
if not _file:
image_pair_loader = ImagePairLoader(predict_mode=predict_mode,
**hparams["test_data"])
else:
predict_mode = not bool(label)
image_pair_loader = ImagePairLoader(predict_mode=predict_mode,
initialize_empty=True)
image_pair_loader.add_image(ImagePair(_file, label))
# Put them into a dict and remove from image_pair_loader to gain more control with
# garbage collection
all_images = {image.id: image for image in image_pair_loader.images}
image_pair_loader.images = None
""" Define UNet model """
from MultiPlanarUNet.models import model_initializer
hparams["build"]["batch_size"] = 1
unet = model_initializer(hparams, False, base_dir)
model_path = get_best_model(base_dir + "/model")
unet.load_weights(model_path)
# Evaluate?
if not predict_mode:
# Prepare dictionary to store results in pd df
results, detailed_res = init_result_dict_3D(all_images, n_classes)
# Save to check correct format
save_all_3D(results, detailed_res, out_dir)
# Define result paths
nii_res_dir = os.path.join(out_dir, "nii_files")
create_folders(nii_res_dir)
image_ids = sorted(all_images)
for n_image, image_id in enumerate(image_ids):
print("\n[*] Running on: %s" % image_id)
# Set image_pair_loader object with only the given file
image = all_images[image_id]
image_pair_loader.images = [image]
seq = image_pair_loader.get_sequencer(n_classes=n_classes,
no_log=True,
**hparams["fit"])
if mode.lower() == "iso_live_3d":
pred = pred_3D_iso(model=unet,
sequence=seq,
image=image,
extra_boxes=N_extra,
min_coverage=None)
else:
# Predict on volume using model
if n_classes > 1:
pred = predict_3D_patches(model=unet,
patches=seq,
image=image,
N_extra=N_extra)
else:
pred = predict_3D_patches_binary(model=unet,
patches=seq,
image_id=image_id,
N_extra=N_extra)
if not predict_mode:
# Get patches for the current image
y = image.labels
# Calculate dice score
print("Mean dice: ", end="", flush=True)
p = pred_to_class(pred, img_dims=3, has_batch_dim=False)
dices = dice_all(y, p, n_classes=n_classes, ignore_zero=True)
mean_dice = dices[~np.isnan(dices)].mean()
print("Dices: ", dices)
print("%s (n=%i)" % (mean_dice, len(dices)))
# Add to results
results[image_id] = [mean_dice]
detailed_res[image_id] = dices
# Overwrite with so-far results
save_all_3D(results, detailed_res, out_dir)
# Save results
save_nii_files(p, image, nii_res_dir, save_only_pred)
# Remove image from dictionary and image_pair_loader to free memory
del all_images[image_id]
image_pair_loader.images.remove(image)
if not predict_mode:
# Write final results
save_all_3D(results, detailed_res, out_dir)
def entry_func(args=None):
# Get command line arguments
args = vars(get_argparser().parse_args(args))
base_dir = os.path.abspath(args["project_dir"])
analytical = args["analytical"]
majority = args["majority"]
_file = args["f"]
label = args["l"]
await_PID = args["wait_for"]
eval_prob = args["eval_prob"]
_continue = args["continue"]
if analytical and majority:
raise ValueError("Cannot specify both --analytical and --majority.")
# Get settings from YAML file
from MultiPlanarUNet.train.hparams import YAMLHParams
hparams = YAMLHParams(os.path.join(base_dir, "train_hparams.yaml"))
if not _file:
try:
# Data specified from command line?
data_dir = os.path.abspath(args["data_dir"])
# Set with default sub dirs
hparams["test_data"] = {
"base_dir": data_dir,
"img_subdir": "images",
"label_subdir": "labels"
}
except (AttributeError, TypeError):
data_dir = hparams["test_data"]["base_dir"]
else:
data_dir = False
out_dir = os.path.abspath(args["out_dir"])
overwrite = args["overwrite"]
predict_mode = args["no_eval"]
save_input_files = args["save_input_files"]
no_argmax = args["no_argmax"]
on_val = args["on_val"]
# Check if valid dir structures
validate_folders(base_dir, out_dir, overwrite, _continue)
# Import all needed modules (folder is valid at this point)
import numpy as np
from MultiPlanarUNet.image import ImagePairLoader, ImagePair
from MultiPlanarUNet.models import FusionModel
from MultiPlanarUNet.models.model_init import init_model
from MultiPlanarUNet.utils import await_and_set_free_gpu, get_best_model, \
create_folders, pred_to_class, set_gpu
from MultiPlanarUNet.logging import init_result_dicts, save_all, load_result_dicts
from MultiPlanarUNet.evaluate import dice_all
from MultiPlanarUNet.utils.fusion import predict_volume, map_real_space_pred
from MultiPlanarUNet.interpolation.sample_grid import get_voxel_grid_real_space
# Wait for PID?
if await_PID:
from MultiPlanarUNet.utils import await_PIDs
await_PIDs(await_PID)
# Set GPU device
# Fetch GPU(s)
num_GPUs = args["num_GPUs"]
force_gpu = args["force_GPU"]
# Wait for free GPU
if not force_gpu:
await_and_set_free_gpu(N=num_GPUs, sleep_seconds=120)
num_GPUs = 1
else:
set_gpu(force_gpu)
num_GPUs = len(force_gpu.split(","))
# Read settings from the project hyperparameter file
n_classes = hparams["build"]["n_classes"]
# Get views
views = np.load("%s/views.npz" % base_dir)["arr_0"]
# Force settings
hparams["fit"]["max_background"] = 1
hparams["fit"]["test_mode"] = True
hparams["fit"]["mix_planes"] = False
hparams["fit"]["live_intrp"] = False
if "use_bounds" in hparams["fit"]:
del hparams["fit"]["use_bounds"]
del hparams["fit"]["views"]
if hparams["build"]["out_activation"] == "linear":
# Trained with logit targets?
hparams["build"][
"out_activation"] = "softmax" if n_classes > 1 else "sigmoid"
# Set ImagePairLoader object
if not _file:
data = "test_data" if not on_val else "val_data"
image_pair_loader = ImagePairLoader(predict_mode=predict_mode,
**hparams[data])
else:
predict_mode = not bool(label)
image_pair_loader = ImagePairLoader(predict_mode=predict_mode,
single_file_mode=True)
image_pair_loader.add_image(ImagePair(_file, label))
# Put them into a dict and remove from image_pair_loader to gain more control with
# garbage collection
all_images = {image.id: image for image in image_pair_loader.images}
image_pair_loader.images = None
if _continue:
all_images = remove_already_predicted(all_images, out_dir)
# Evaluate?
if not predict_mode:
if _continue:
csv_dir = os.path.join(out_dir, "csv")
results, detailed_res = load_result_dicts(csv_dir=csv_dir,
views=views)
else:
# Prepare dictionary to store results in pd df
results, detailed_res = init_result_dicts(views, all_images,
n_classes)
# Save to check correct format
save_all(results, detailed_res, out_dir)
# Define result paths
nii_res_dir = os.path.join(out_dir, "nii_files")
create_folders(nii_res_dir)
""" Define UNet model """
model_path = get_best_model(base_dir + "/model")
unet = init_model(hparams["build"])
unet.load_weights(model_path, by_name=True)
if num_GPUs > 1:
from tensorflow.keras.utils import multi_gpu_model
n_classes = unet.n_classes
unet = multi_gpu_model(unet, gpus=num_GPUs)
unet.n_classes = n_classes
weights_name = os.path.splitext(os.path.split(model_path)[1])[0]
if not analytical and not majority:
# Get Fusion model
fm = FusionModel(n_inputs=len(views), n_classes=n_classes)
weights = base_dir + "/model/fusion_weights/%s_fusion_weights.h5" % weights_name
print("\n[*] Loading weights:\n", weights)
# Load fusion weights
fm.load_weights(weights)
print("\nLoaded weights:\n\n%s\n%s\n---" %
tuple(fm.layers[-1].get_weights()))
# Multi-gpu?
if num_GPUs > 1:
print("Using multi-GPU model (%i GPUs)" % num_GPUs)
fm = multi_gpu_model(fm, gpus=num_GPUs)
"""
Finally predict on the images
"""
image_ids = sorted(all_images)
N_images = len(image_ids)
for n_image, image_id in enumerate(image_ids):
print("\n[*] (%i/%s) Running on: %s" %
(n_image + 1, N_images, image_id))
# Set image_pair_loader object with only the given file
image = all_images[image_id]
image_pair_loader.images = [image]
# Load views
kwargs = hparams["fit"]
kwargs.update(hparams["build"])
seq = image_pair_loader.get_sequencer(views=views, **kwargs)
# Get voxel grid in real space
voxel_grid_real_space = get_voxel_grid_real_space(image)
# Prepare tensor to store combined prediction
d = image.image.shape[:-1]
if not majority:
combined = np.empty(shape=(len(views), d[0], d[1], d[2],
n_classes),
dtype=np.float32)
else:
combined = np.empty(shape=(d[0], d[1], d[2], n_classes),
dtype=np.float32)
print("Predicting on brain hyper-volume of shape:", combined.shape)
# Predict for each view
for n_view, v in enumerate(views):
print("\n[*] (%i/%i) View: %s" % (n_view + 1, len(views), v))
# for each view, predict on all voxels and map the predictions
# back into the original coordinate system
# Sample planes from the image at grid_real_space grid
# in real space (scanner RAS) coordinates.
X, y, grid, inv_basis = seq.get_view_from(image.id,
v,
n_planes="same+20")
# Predict on volume using model
pred = predict_volume(unet, X, axis=2, batch_size=seq.batch_size)
# Map the real space coordiante predictions to nearest
# real space coordinates defined on voxel grid
mapped_pred = map_real_space_pred(pred,
grid,
inv_basis,
voxel_grid_real_space,
method="nearest")
if not majority:
combined[n_view] = mapped_pred
else:
combined += mapped_pred
if n_classes == 1:
# Set to background if outside pred domain
combined[n_view][np.isnan(combined[n_view])] = 0.
if not predict_mode and np.random.rand() <= eval_prob:
view_dices = dice_all(y,
pred_to_class(pred,
img_dims=3,
has_batch_dim=False),
ignore_zero=False,
n_classes=n_classes,
skip_if_no_y=False)
mapped_dices = dice_all(image.labels,
pred_to_class(mapped_pred,
img_dims=3,
has_batch_dim=False),
ignore_zero=False,
n_classes=n_classes,
skip_if_no_y=False)
mean_dice = mapped_dices[~np.isnan(mapped_dices)][1:].mean()
# Print dice scores
print("View dice scores: ", view_dices)
print("Mapped dice scores: ", mapped_dices)
print("Mean dice (n=%i): " % (len(mapped_dices) - 1),
mean_dice)
# Add to results
results.loc[image_id, str(v)] = mean_dice
detailed_res[str(v)][image_id] = mapped_dices[1:]
# Overwrite with so-far results
save_all(results, detailed_res, out_dir)
else:
print("Skipping evaluation for this view... "
"(eval_prob=%.3f, predict_mode=%s)" %
(eval_prob, predict_mode))
if not analytical and not majority:
# Combine predictions across views using Fusion model
print("\nFusing views...")
combined = np.moveaxis(combined, 0, -2).reshape(
(-1, len(views), n_classes))
combined = fm.predict(combined, batch_size=10**4,
verbose=1).reshape(
(d[0], d[1], d[2], n_classes))
elif analytical:
print("\nFusing views (analytical)...")
combined = np.sum(combined, axis=0)
if not no_argmax:
print("\nComputing majority vote...")
combined = pred_to_class(combined.squeeze(),
img_dims=3).astype(np.uint8)
if not predict_mode:
if no_argmax:
# MAP only for dice calculation
c_temp = pred_to_class(combined, img_dims=3).astype(np.uint8)
else:
c_temp = combined
# Calculate combined prediction dice
dices = dice_all(image.labels,
c_temp,
n_classes=n_classes,
ignore_zero=True,
skip_if_no_y=False)
mean_dice = dices[~np.isnan(dices)].mean()
detailed_res["MJ"][image_id] = dices
print("Combined dices: ", dices)
print("Combined mean dice: ", mean_dice)
results.loc[image_id, "MJ"] = mean_dice
# Overwrite with so-far results
save_all(results, detailed_res, out_dir)
# Save combined prediction volume as .nii file
print("Saving .nii files...")
save_nii_files(combined, image, nii_res_dir, save_input_files)
# Remove image from dictionary and image_pair_loader to free memory
del all_images[image_id]
image_pair_loader.images.remove(image)
if not predict_mode:
# Write final results
save_all(results, detailed_res, out_dir)