def __call__(self, proposals_with_targets):
"""
Filters proposals with targets to keep only the ones relevant for
DensePose training
proposals: list(Instances), each element of the list corresponds to
various instances (proposals, GT for boxes and densepose) for one
image
"""
proposals_filtered = []
for proposals_per_image in proposals_with_targets:
if not hasattr(proposals_per_image, "gt_densepose"):
continue
assert hasattr(proposals_per_image, "gt_boxes")
assert hasattr(proposals_per_image, "proposal_boxes")
gt_boxes = proposals_per_image.gt_boxes
est_boxes = proposals_per_image.proposal_boxes
# apply match threshold for densepose head
iou = matched_boxlist_iou(gt_boxes, est_boxes)
iou_select = iou > self.iou_threshold
proposals_per_image = proposals_per_image[iou_select]
assert len(proposals_per_image.gt_boxes) == len(proposals_per_image.proposal_boxes)
# filter out any target without densepose annotation
gt_densepose = proposals_per_image.gt_densepose
assert len(proposals_per_image.gt_boxes) == len(proposals_per_image.gt_densepose)
selected_indices = [
i for i, dp_target in enumerate(gt_densepose) if dp_target is not None
]
if len(selected_indices) != len(gt_densepose):
proposals_per_image = proposals_per_image[selected_indices]
assert len(proposals_per_image.gt_boxes) == len(proposals_per_image.proposal_boxes)
assert len(proposals_per_image.gt_boxes) == len(proposals_per_image.gt_densepose)
proposals_filtered.append(proposals_per_image)
return proposals_filtered
def select_proposals_with_visible_keypoints(proposals):
"""
Args:
proposals (list[Instances]): a list of N Instances, where N is the
number of images.
Returns:
proposals: only contains proposals with at least one visible keypoint.
Note that this is still slightly different from Detectron.
In Detectron, proposals for training keypoint head are re-sampled from
all the proposals with IOU>threshold & >=1 visible keypoint.
Here, the proposals are first sampled from all proposals with
IOU>threshold, then proposals with no visible keypoint are filtered out.
This strategy seems to make no difference on Detectron and is easier to implement.
"""
ret = []
all_num_fg = []
for proposals_per_image in proposals:
gt_boxes = proposals_per_image.gt_boxes
est_boxes = proposals_per_image.proposal_boxes
iou = matched_boxlist_iou(gt_boxes, est_boxes)
iou_select = iou > 0.55 # self.iou_threshold
proposals_per_image = proposals_per_image[iou_select]
# #fg x K x 3
gt_keypoints = proposals_per_image.gt_keypoints.tensor
vis_mask = gt_keypoints[:, :, 2] >= 1
xs, ys = gt_keypoints[:, :, 0], gt_keypoints[:, :, 1]
proposal_boxes = proposals_per_image.proposal_boxes.tensor.unsqueeze(
dim=1) # #fg x 1 x 4
kp_in_box = ((xs >= proposal_boxes[:, :, 0])
& (xs <= proposal_boxes[:, :, 2])
& (ys >= proposal_boxes[:, :, 1])
& (ys <= proposal_boxes[:, :, 3]))
selection = (kp_in_box & vis_mask).any(dim=1)
selection_idxs = torch.nonzero(selection).squeeze(1)
all_num_fg.append(selection_idxs.numel())
ret.append(proposals_per_image[selection_idxs])
storage = get_event_storage()
storage.put_scalar("keypoint_head/num_fg_samples", np.mean(all_num_fg))
return ret
def __call__(self, features: List[torch.Tensor],
proposals_with_targets: List[Instances]):
"""
Filters proposals with targets to keep only the ones relevant for
DensePose training
Args:
features (list[Tensor]): input data as a list of features,
each feature is a tensor. Axis 0 represents the number of
images `N` in the input data; axes 1-3 are channels,
height, and width, which may vary between features
(e.g., if a feature pyramid is used).
proposals_with_targets (list[Instances]): length `N` list of
`Instances`. The i-th `Instances` contains instances
(proposals, GT) for the i-th input image,
Returns:
list[Tensor]: filtered features
list[Instances]: filtered proposals
"""
proposals_filtered = []
# TODO: the commented out code was supposed to correctly deal with situations
# where no valid DensePose GT is available for certain images. The corresponding
# image features were sliced and proposals were filtered. This led to performance
# deterioration, both in terms of runtime and in terms of evaluation results.
#
# feature_mask = torch.ones(
# len(proposals_with_targets),
# dtype=torch.bool,
# device=features[0].device if len(features) > 0 else torch.device("cpu"),
# )
for i, proposals_per_image in enumerate(proposals_with_targets):
if not proposals_per_image.has("gt_densepose") and (
not proposals_per_image.has("gt_masks")
or not self.keep_masks):
# feature_mask[i] = 0
continue
gt_boxes = proposals_per_image.gt_boxes
est_boxes = proposals_per_image.proposal_boxes
# apply match threshold for densepose head
iou = matched_boxlist_iou(gt_boxes, est_boxes)
iou_select = iou > self.iou_threshold
proposals_per_image = proposals_per_image[iou_select]
N_gt_boxes = len(proposals_per_image.gt_boxes)
assert N_gt_boxes == len(proposals_per_image.proposal_boxes), (
f"The number of GT boxes {N_gt_boxes} is different from the "
f"number of proposal boxes {len(proposals_per_image.proposal_boxes)}"
)
# filter out any target without suitable annotation
if self.keep_masks:
gt_masks = (proposals_per_image.gt_masks if hasattr(
proposals_per_image, "gt_masks") else [None] * N_gt_boxes)
else:
gt_masks = [None] * N_gt_boxes
gt_densepose = (proposals_per_image.gt_densepose if hasattr(
proposals_per_image, "gt_densepose") else [None] * N_gt_boxes)
assert len(gt_masks) == N_gt_boxes
assert len(gt_densepose) == N_gt_boxes
selected_indices = [
i
for i, (dp_target,
mask_target) in enumerate(zip(gt_densepose, gt_masks))
if (dp_target is not None) or (mask_target is not None)
]
# if not len(selected_indices):
# feature_mask[i] = 0
# continue
if len(selected_indices) != N_gt_boxes:
proposals_per_image = proposals_per_image[selected_indices]
assert len(proposals_per_image.gt_boxes) == len(
proposals_per_image.proposal_boxes)
proposals_filtered.append(proposals_per_image)
# features_filtered = [feature[feature_mask] for feature in features]
# return features_filtered, proposals_filtered
return features, proposals_filtered
def __call__(self, proposals_with_targets):
"""
Filters proposals with targets to keep only the ones relevant for
DensePose training
proposals: list(Instances), each element of the list corresponds to
various instances (proposals, GT for boxes and densepose) for one
image
"""
selection_masks = [] # MY CODE
proposals_filtered = []
for proposals_per_image in proposals_with_targets:
if not hasattr(proposals_per_image, "gt_densepose"):
continue
assert hasattr(proposals_per_image, "gt_boxes")
assert hasattr(proposals_per_image, "proposal_boxes")
gt_boxes = proposals_per_image.gt_boxes
est_boxes = proposals_per_image.proposal_boxes
# apply match threshold for densepose head
iou = matched_boxlist_iou(gt_boxes, est_boxes)
iou_select = iou > self.iou_threshold
proposals_per_image = proposals_per_image[iou_select]
assert len(proposals_per_image.gt_boxes) == len(
proposals_per_image.proposal_boxes)
# filter out any target without densepose annotation
gt_densepose = proposals_per_image.gt_densepose
assert len(proposals_per_image.gt_boxes) == len(
proposals_per_image.gt_densepose)
selected_indices = [
i for i, dp_target in enumerate(gt_densepose)
if dp_target is not None
]
if len(selected_indices) != len(gt_densepose):
proposals_per_image = proposals_per_image[selected_indices]
# if proposals_per_image.proposal_boxes.tensor.size(0) == 0:
if len(proposals_per_image) == 0:
mask = iou > 9000. # just big number > 100
selection_masks.append(mask)
continue
assert len(proposals_per_image.gt_boxes) == len(
proposals_per_image.proposal_boxes)
assert len(proposals_per_image.gt_boxes) == len(
proposals_per_image.gt_densepose)
proposals_filtered.append(proposals_per_image)
mask = copy.deepcopy(iou_select)
i = 0
selected_num = 0
for j in range(len(iou_select)):
if iou_select[j]:
if i not in selected_indices:
mask[j] = False
else:
selected_num += 1
i += 1
assert selected_num == len(selected_indices)
selection_masks.append(mask)
return proposals_filtered, selection_masks
def forward(self, batched_inputs):
"""
Args:
batched_inputs: a list, batched outputs of :class:`DatasetMapper` .
Each item in the list contains the inputs for one image.
For now, each item in the list is a dict that contains:
* image: Tensor, image in (C, H, W) format.
* instances (optional): groundtruth :class:`Instances`
* proposals (optional): :class:`Instances`, precomputed proposals.
Other information that's included in the original dicts, such as:
* "height", "width" (int): the output resolution of the model, used in inference.
See :meth:`postprocess` for details.
Returns:
list[dict]:
Each dict is the output for one input image.
The dict contains one key "instances" whose value is a :class:`Instances`.
The :class:`Instances` object has the following keys:
"pred_boxes", "pred_classes", "scores", "pred_masks", "pred_keypoints"
"""
if not self.training:
return self.inference(batched_inputs)
images = self.preprocess_image(batched_inputs)
if "instances" in batched_inputs[0]:
gt_instances = [
x["instances"].to(self.device) for x in batched_inputs
]
elif "targets" in batched_inputs[0]:
log_first_n(
logging.WARN,
"'targets' in the model inputs is now renamed to 'instances'!",
n=10)
gt_instances = [
x["targets"].to(self.device) for x in batched_inputs
]
else:
gt_instances = None
features = self.backbone(images.tensor)
proposals, proposal_losses = self.proposal_generator(
images, features, gt_instances)
_, outputs_classic, outputs = self.tsd(images, features, proposals,
gt_instances)
detector_classic_losses = outputs_classic.losses()
detector_losses = outputs.losses()
detector_classic_losses[
'loss_cls_classic'] = detector_classic_losses.pop('loss_cls')
detector_classic_losses[
'loss_box_reg_classic'] = detector_classic_losses.pop(
'loss_box_reg')
if self.vis_period > 0:
storage = get_event_storage()
if storage.iter % self.vis_period == 0:
self.visualize_training(batched_inputs, proposals)
# Progressive constraints
margin_regression_losses = 0
predict_boxes_classic = outputs_classic.predict_boxes_for_gt_classes()
predict_boxes = outputs.predict_boxes_for_gt_classes()
idx = -1
endIdx = 0
ind = outputs.gt_classes != (outputs.pred_proposal_deltas.size(1) / 4)
for pbc, pb in zip(predict_boxes_classic, predict_boxes):
idx += 1
startIdx = endIdx
endIdx += outputs.num_preds_per_image[idx]
iind = ind[startIdx:endIdx]
margin_regression_losses += F.relu(self.MR - abs(
matched_boxlist_iou(Boxes(pbc[iind]),
outputs.gt_boxes[startIdx:endIdx][iind]) -
matched_boxlist_iou(Boxes(pb[iind]), outputs.
gt_boxes[startIdx:endIdx][iind]))).mean()
margin_regression_losses = margin_regression_losses / len(
predict_boxes)
margin_classification_losses = 0
for ppc, pc in zip(outputs_classic.predict_probs(),
outputs.predict_probs()):
margin_classification_losses += F.relu(self.MC -
(abs(ppc -
pc)).sum(1)).mean()
margin_classification_losses = margin_classification_losses / len(
outputs.predict_probs())
losses = {}
losses.update(detector_classic_losses)
losses.update(detector_losses)
losses.update(proposal_losses)
losses.update({
'loss_margin_classification': margin_classification_losses,
'loss_margin_regression': margin_regression_losses
})
return losses