class WrongPredictionVis:
"""
WrongPredictionVis class for visualizing video inputs to Tensorboard
for instances that the model makes wrong predictions.
"""
def __init__(self, cfg):
"""
Args:
cfg (CfgNode): configs. Details can be found in
slowfast/config/defaults.py
"""
self.cfg = cfg
self.class_names, _, self.subset = get_class_names(
cfg.TENSORBOARD.CLASS_NAMES_PATH,
subset_path=cfg.TENSORBOARD.WRONG_PRED_VIS.SUBSET_PATH,
)
if self.subset is not None:
self.subset = set(self.subset)
self.num_class = cfg.MODEL.NUM_CLASSES
self.video_vis = VideoVisualizer(
cfg.MODEL.NUM_CLASSES,
cfg.TENSORBOARD.CLASS_NAMES_PATH,
1,
cfg.TENSORBOARD.MODEL_VIS.COLORMAP,
)
self.tag = cfg.TENSORBOARD.WRONG_PRED_VIS.TAG
self.writer = tb.TensorboardWriter(cfg)
self.model_incorrect_classes = set()
def _pick_wrong_preds(self, labels, preds):
"""
Returns a 1D tensor that contains the indices of instances that have
wrong predictions, where true labels in in the specified subset.
Args:
labels (tensor): tensor of shape (n_instances,) containing class ids.
preds (tensor): class scores from model, shape (n_intances, n_classes)
Returns:
mask (tensor): boolean tensor. `mask[i]` is True if `model` makes a wrong prediction.
"""
subset_mask = torch.ones(size=(len(labels), ), dtype=torch.bool)
if self.subset is not None:
for i, label in enumerate(labels):
if label not in self.subset:
subset_mask[i] = False
preds_ids = torch.argmax(preds, dim=-1)
mask = preds_ids != labels
mask &= subset_mask
for i, wrong_pred in enumerate(mask):
if wrong_pred:
self.model_incorrect_classes.add(labels[i])
return mask
def visualize_vid(self, video_input, labels, preds, batch_idx):
"""
Draw predicted labels on video inputs and visualize all incorrectly classified
videos in the current batch.
Args:
video_input (list of list of tensor(s)): list of videos for all pathways.
labels (array-like): shape (n_instances,) of true label for each instance.
preds (tensor): shape (n, instances, n_classes). The predicted scores for all instances.
tag (Optional[str]): all visualized video will be added under this tag. This is for organization
purposes in Tensorboard.
batch_idx (int): batch index of the current videos.
"""
def add_video(vid, preds, tag, true_class_name):
"""
Draw predicted label on video and add it to Tensorboard.
Args:
vid (array-like): shape (C, T, H, W). Each image in `vid` is a RGB image.
preds (tensor): shape (n_classes,) or (1, n_classes). The predicted scores
for the current `vid`.
tag (str): tag for `vid` in Tensorboard.
true_class_name (str): the ground-truth class name of the current `vid` instance.
"""
# Permute to (T, H, W, C).
vid = vid.permute(1, 2, 3, 0)
vid = data_utils.revert_tensor_normalize(vid.cpu(),
self.cfg.DATA.MEAN,
self.cfg.DATA.STD)
vid = self.video_vis.draw_clip(vid, preds)
vid = torch.from_numpy(np.array(vid)).permute(0, 3, 1, 2)
vid = torch.unsqueeze(vid, dim=0)
self.writer.add_video(vid,
tag="{}: {}".format(tag, true_class_name))
mask = self._pick_wrong_preds(labels, preds)
video_indices = torch.squeeze(mask.nonzero(), dim=-1)
# Visualize each wrongly classfied video.
for vid_idx in video_indices:
cur_vid_idx = batch_idx * len(video_input[0]) + vid_idx
for pathway in range(len(video_input)):
add_video(
video_input[pathway][vid_idx],
preds=preds[vid_idx],
tag=self.tag +
"/Video {}, Pathway {}".format(cur_vid_idx, pathway),
true_class_name=self.class_names[labels[vid_idx]],
)
@property
def wrong_class_prediction(self):
"""
Return class ids that the model predicted incorrectly.
"""
incorrect_class_names = [
self.class_names[i] for i in self.model_incorrect_classes
]
return list(set(incorrect_class_names))
def clean(self):
"""
Close Tensorboard writer.
"""
self.writer.close()
def run_visualization(vis_loader, model, cfg, writer=None):
"""
Run model visualization (weights, activations and model inputs) and visualize
them on Tensorboard.
Args:
vis_loader (loader): video visualization loader.
model (model): the video model to visualize.
cfg (CfgNode): configs. Details can be found in
slowfast/config/defaults.py
writer (TensorboardWriter, optional): TensorboardWriter object
to writer Tensorboard log.
"""
n_devices = cfg.NUM_GPUS * cfg.NUM_SHARDS
prefix = "module/" if n_devices > 1 else ""
# Get a list of selected layer names and indexing.
layer_ls, indexing_dict = process_layer_index_data(
cfg.TENSORBOARD.MODEL_VIS.LAYER_LIST, layer_name_prefix=prefix)
logger.info("Start Model Visualization.")
# Register hooks for activations.
model_vis = GetWeightAndActivation(model, layer_ls)
if writer is not None and cfg.TENSORBOARD.MODEL_VIS.MODEL_WEIGHTS:
layer_weights = model_vis.get_weights()
writer.plot_weights_and_activations(layer_weights,
tag="Layer Weights/",
heat_map=False)
video_vis = VideoVisualizer(
cfg.MODEL.NUM_CLASSES,
cfg.TENSORBOARD.CLASS_NAMES_PATH,
cfg.TENSORBOARD.MODEL_VIS.TOPK_PREDS,
cfg.TENSORBOARD.MODEL_VIS.COLORMAP,
)
if n_devices > 1:
grad_cam_layer_ls = [
"module/" + layer
for layer in cfg.TENSORBOARD.MODEL_VIS.GRAD_CAM.LAYER_LIST
]
else:
grad_cam_layer_ls = cfg.TENSORBOARD.MODEL_VIS.GRAD_CAM.LAYER_LIST
if cfg.TENSORBOARD.MODEL_VIS.GRAD_CAM.ENABLE:
gradcam = GradCAM(
model,
target_layers=grad_cam_layer_ls,
data_mean=cfg.DATA.MEAN,
data_std=cfg.DATA.STD,
colormap=cfg.TENSORBOARD.MODEL_VIS.GRAD_CAM.COLORMAP,
)
logger.info("Finish drawing weights.")
global_idx = -1
for inputs, labels, _, meta in tqdm.tqdm(vis_loader):
if cfg.NUM_GPUS:
# Transfer the data to the current GPU device.
if isinstance(inputs, (list, )):
for i in range(len(inputs)):
inputs[i] = inputs[i].cuda(non_blocking=True)
else:
inputs = inputs.cuda(non_blocking=True)
labels = labels.cuda()
for key, val in meta.items():
if isinstance(val, (list, )):
for i in range(len(val)):
val[i] = val[i].cuda(non_blocking=True)
else:
meta[key] = val.cuda(non_blocking=True)
if cfg.DETECTION.ENABLE:
activations, preds = model_vis.get_activations(
inputs, meta["boxes"])
else:
activations, preds = model_vis.get_activations(inputs)
if cfg.TENSORBOARD.MODEL_VIS.GRAD_CAM.ENABLE:
if cfg.TENSORBOARD.MODEL_VIS.GRAD_CAM.USE_TRUE_LABEL:
inputs, preds = gradcam(inputs, labels=labels)
else:
inputs, preds = gradcam(inputs)
if cfg.NUM_GPUS:
inputs = du.all_gather_unaligned(inputs)
activations = du.all_gather_unaligned(activations)
preds = du.all_gather_unaligned(preds)
if isinstance(inputs[0], list):
for i in range(len(inputs)):
for j in range(len(inputs[0])):
inputs[i][j] = inputs[i][j].cpu()
else:
inputs = [inp.cpu() for inp in inputs]
preds = [pred.cpu() for pred in preds]
else:
inputs, activations, preds = [inputs], [activations], [preds]
boxes = [None] * max(n_devices, 1)
if cfg.DETECTION.ENABLE and cfg.NUM_GPUS:
boxes = du.all_gather_unaligned(meta["boxes"])
boxes = [box.cpu() for box in boxes]
if writer is not None:
total_vids = 0
for i in range(max(n_devices, 1)):
cur_input = inputs[i]
cur_activations = activations[i]
cur_batch_size = cur_input[0].shape[0]
cur_preds = preds[i]
cur_boxes = boxes[i]
for cur_batch_idx in range(cur_batch_size):
global_idx += 1
total_vids += 1
if (cfg.TENSORBOARD.MODEL_VIS.INPUT_VIDEO
or cfg.TENSORBOARD.MODEL_VIS.GRAD_CAM.ENABLE):
for path_idx, input_pathway in enumerate(cur_input):
if cfg.TEST.DATASET == "ava" and cfg.AVA.BGR:
video = input_pathway[cur_batch_idx, [2, 1, 0],
...]
else:
video = input_pathway[cur_batch_idx]
if not cfg.TENSORBOARD.MODEL_VIS.GRAD_CAM.ENABLE:
# Permute to (T, H, W, C) from (C, T, H, W).
video = video.permute(1, 2, 3, 0)
video = data_utils.revert_tensor_normalize(
video, cfg.DATA.MEAN, cfg.DATA.STD)
else:
# Permute from (T, C, H, W) to (T, H, W, C)
video = video.permute(0, 2, 3, 1)
bboxes = (None if cur_boxes is None else
cur_boxes[:, 1:])
cur_prediction = (cur_preds if cfg.DETECTION.ENABLE
else cur_preds[cur_batch_idx])
video = video_vis.draw_clip(video,
cur_prediction,
bboxes=bboxes)
video = (torch.from_numpy(np.array(video)).permute(
0, 3, 1, 2).unsqueeze(0))
writer.add_video(
video,
tag="Input {}/Pathway {}".format(
global_idx, path_idx + 1),
)
if cfg.TENSORBOARD.MODEL_VIS.ACTIVATIONS:
writer.plot_weights_and_activations(
cur_activations,
tag="Input {}/Activations: ".format(global_idx),
batch_idx=cur_batch_idx,
indexing_dict=indexing_dict,
)
def run_visualization(vis_loader, model, cfg, writer=None):
"""
Run model visualization (weights, activations and model inputs) and visualize
them on Tensorboard.
Args:
vis_loader (loader): video visualization loader.
model (model): the video model to visualize.
cfg (CfgNode): configs. Details can be found in
slowfast/config/defaults.py
writer (TensorboardWriter, optional): TensorboardWriter object
to writer Tensorboard log.
"""
n_devices = cfg.NUM_GPUS * cfg.NUM_SHARDS
prefix = "module/" if n_devices > 1 else ""
# Get a list of selected layer names and indexing.
layer_ls, indexing_dict = process_layer_index_data(
cfg.TENSORBOARD.MODEL_VIS.LAYER_LIST, layer_name_prefix=prefix)
logger.info("Start Model Visualization.")
# Register hooks for activations.
model_vis = GetWeightAndActivation(model, layer_ls)
if writer is not None and cfg.TENSORBOARD.MODEL_VIS.MODEL_WEIGHTS:
layer_weights = model_vis.get_weights()
writer.plot_weights_and_activations(layer_weights,
tag="Layer Weights/",
heat_map=False)
video_vis = VideoVisualizer(
cfg.MODEL.NUM_CLASSES,
cfg.TENSORBOARD.CLASS_NAMES_PATH,
cfg.TENSORBOARD.MODEL_VIS.TOPK_PREDS,
cfg.TENSORBOARD.MODEL_VIS.COLORMAP,
)
logger.info("Finish drawing weights.")
global_idx = -1
for inputs, _, _, meta in vis_loader:
# Transfer the data to the current GPU device.
if isinstance(inputs, (list, )):
for i in range(len(inputs)):
inputs[i] = inputs[i].cuda(non_blocking=True)
else:
inputs = inputs.cuda(non_blocking=True)
for key, val in meta.items():
if isinstance(val, (list, )):
for i in range(len(val)):
val[i] = val[i].cuda(non_blocking=True)
else:
meta[key] = val.cuda(non_blocking=True)
if cfg.DETECTION.ENABLE:
activations, preds = model_vis.get_activations(
inputs, meta["boxes"])
else:
activations, preds = model_vis.get_activations(inputs)
inputs = du.all_gather_unaligned(inputs)
activations = du.all_gather_unaligned(activations)
preds = du.all_gather_unaligned(preds)
boxes = [None] * n_devices
if cfg.DETECTION.ENABLE:
boxes = du.all_gather_unaligned(meta["boxes"])
if writer is not None:
total_vids = 0
for i in range(n_devices):
cur_input = inputs[i]
cur_activations = activations[i]
cur_batch_size = cur_input[0].shape[0]
cur_preds = preds[i].cpu()
cur_boxes = boxes[i]
for cur_batch_idx in range(cur_batch_size):
global_idx += 1
total_vids += 1
if cfg.TENSORBOARD.MODEL_VIS.INPUT_VIDEO:
for path_idx, input_pathway in enumerate(cur_input):
if (cfg.TEST.DATASET == "ava" or cfg.TEST.DATASET
== "custom") and cfg.AVA.BGR:
video = input_pathway[cur_batch_idx, [2, 1, 0],
...]
else:
video = input_pathway[cur_batch_idx]
# Permute to (T, H, W, C) from (C, T, H, W).
video = video.permute(1, 2, 3, 0)
video = data_utils.revert_tensor_normalize(
video.cpu(), cfg.DATA.MEAN, cfg.DATA.STD)
bboxes = (None if cur_boxes is None else
cur_boxes[:, 1:].cpu())
video = video_vis.draw_clip(video,
cur_preds,
bboxes=bboxes)
video = (torch.Tensor(video).permute(
0, 3, 1, 2).unsqueeze(0))
writer.add_video(
video,
tag="Input {}/Input from pathway {}".format(
global_idx, path_idx + 1),
)
if cfg.TENSORBOARD.MODEL_VIS.ACTIVATIONS:
writer.plot_weights_and_activations(
cur_activations,
tag="Input {}/Activations: ".format(global_idx),
batch_idx=cur_batch_idx,
indexing_dict=indexing_dict,
)
logger.info("Visualized {} videos...".format(total_vids))
