def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(
*rpn_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(
self.train_cfg.rcnn.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
bbox_targets = (bbox_targets[0],)+bbox_targets[3:]
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
# mask head forward and loss
if self.with_mask:
if not self.share_roi_extractor:
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(
res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(
res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds]
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
return losses
def __init__(
self,
num_classes,
in_channels,
num_query=100,
num_reg_fcs=2,
transformer=None,
sync_cls_avg_factor=False,
positional_encoding=dict(type='SinePositionalEncoding',
num_feats=128,
normalize=True),
loss_cls=dict(type='CrossEntropyLoss',
bg_cls_weight=0.1,
use_sigmoid=False,
loss_weight=1.0,
class_weight=1.0),
loss_bbox=dict(type='L1Loss', loss_weight=5.0),
loss_iou=dict(type='GIoULoss', loss_weight=2.0),
train_cfg=dict(assigner=dict(
type='HungarianAssigner',
cls_cost=dict(type='ClassificationCost', weight=1.),
reg_cost=dict(type='BBoxL1Cost', weight=5.0),
iou_cost=dict(type='IoUCost', iou_mode='giou', weight=2.0))),
test_cfg=dict(max_per_img=100),
init_cfg=None,
**kwargs):
# NOTE here use `AnchorFreeHead` instead of `TransformerHead`,
# since it brings inconvenience when the initialization of
# `AnchorFreeHead` is called.
super(AnchorFreeHead, self).__init__(init_cfg)
self.bg_cls_weight = 0
self.sync_cls_avg_factor = sync_cls_avg_factor
class_weight = loss_cls.get('class_weight', None)
if class_weight is not None and (self.__class__ is DETRHead):
assert isinstance(class_weight, float), 'Expected ' \
'class_weight to have type float. Found ' \
f'{type(class_weight)}.'
# NOTE following the official DETR rep0, bg_cls_weight means
# relative classification weight of the no-object class.
bg_cls_weight = loss_cls.get('bg_cls_weight', class_weight)
assert isinstance(bg_cls_weight, float), 'Expected ' \
'bg_cls_weight to have type float. Found ' \
f'{type(bg_cls_weight)}.'
class_weight = torch.ones(num_classes + 1) * class_weight
# set background class as the last indice
class_weight[num_classes] = bg_cls_weight
loss_cls.update({'class_weight': class_weight})
if 'bg_cls_weight' in loss_cls:
loss_cls.pop('bg_cls_weight')
self.bg_cls_weight = bg_cls_weight
if train_cfg:
assert 'assigner' in train_cfg, 'assigner should be provided '\
'when train_cfg is set.'
assigner = train_cfg['assigner']
assert loss_cls['loss_weight'] == assigner['cls_cost']['weight'], \
'The classification weight for loss and matcher should be' \
'exactly the same.'
assert loss_bbox['loss_weight'] == assigner['reg_cost'][
'weight'], 'The regression L1 weight for loss and matcher ' \
'should be exactly the same.'
assert loss_iou['loss_weight'] == assigner['iou_cost']['weight'], \
'The regression iou weight for loss and matcher should be' \
'exactly the same.'
self.assigner = build_assigner(assigner)
# DETR sampling=False, so use PseudoSampler
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
self.num_query = num_query
self.num_classes = num_classes
self.in_channels = in_channels
self.num_reg_fcs = num_reg_fcs
self.train_cfg = train_cfg
self.test_cfg = test_cfg
self.fp16_enabled = False
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
self.loss_iou = build_loss(loss_iou)
if self.loss_cls.use_sigmoid:
self.cls_out_channels = num_classes
else:
self.cls_out_channels = num_classes + 1
self.act_cfg = transformer.get('act_cfg',
dict(type='ReLU', inplace=True))
self.activate = build_activation_layer(self.act_cfg)
self.positional_encoding = build_positional_encoding(
positional_encoding)
self.transformer = build_transformer(transformer)
self.embed_dims = self.transformer.embed_dims
assert 'num_feats' in positional_encoding
num_feats = positional_encoding['num_feats']
assert num_feats * 2 == self.embed_dims, 'embed_dims should' \
f' be exactly 2 times of num_feats. Found {self.embed_dims}' \
f' and {num_feats}.'
self._init_layers()
def forward_train(self,
img,
img_t,
img_meta,
gt_bboxes,
gt_bboxes_ignore,
gt_labels,
gt_masks=None,
proposals=None):
x = self.extract_feat(img, img_t)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs)
losses.update(rpn_losses)
"""
edited by Yuan,original code use same nms config of RPN during training and testing.
they are different now, more proposals can be output to next step during training.
"""
proposal_inputs = rpn_outs + (img_meta, self.train_cfg.rpn.nms)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
# print('number of proposals:{}'.format(len(proposal_list[0])))
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(self.train_cfg.rcnn.sampler,
context=self)
num_imgs = img.size(0)
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_upper_neck:
bbox_feats = self.upper_neck(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
# mask head forward and loss
if self.with_mask:
if not self.shared_roi_extractor:
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
if self.with_upper_neck:
mask_feats = self.upper_neck(mask_feats)
else:
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds]
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
return losses
def forward_debug(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
"""
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_meta (list[dict]): list of image info dict where each dict has:
'img_shape', 'scale_factor', 'flip', and my also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
`mmdet/datasets/pipelines/formatting.py:Collect`.
gt_bboxes (list[Tensor]): each item are the truth boxes for each
image in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): specify which bounding
boxes can be ignored when computing the loss.
gt_masks (None | Tensor) : true segmentation masks for each box
used if the architecture supports a segmentation task.
proposals : override rpn proposals with custom proposals. Use when
`with_rpn` is False.
Returns:
dict[str, Tensor]: a dictionary of loss components
"""
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(self.train_cfg.rcnn.sampler,
context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
# print(cls_score.shape, bbox_targets[0].shape, bbox_targets[2].shape)
# print(cls_score[0], bbox_pred[0], bbox_targets[0][0],bbox_targets[2][0])
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
# mask head forward and loss
if self.with_mask:
if not self.share_roi_extractor:
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds]
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
return losses, proposal_list, sampling_results, rois
def forward_train(
self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None,
):
mix_weight = []
for i in range(len(img_meta)):
if img_meta[i]['mix_weight'] is not None:
mix_weight.append(
torch.tensor(img_meta[i]['mix_weight']).cuda())
else:
mix_weight = None
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_inputs = rpn_outs + (img_meta, self.test_cfg.rpn)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(self.train_cfg.rcnn.sampler,
context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
if mix_weight is not None:
mix_inds = []
for i in range(len(sampling_results)):
mix_ind = torch.ones(
sampling_results[i].bboxes.shape[0]).cuda()
for j in range(
len(sampling_results[i].pos_assigned_gt_inds)):
mix_ind[j] = mix_weight[i][
sampling_results[i].pos_assigned_gt_inds[j]]
mix_inds.append(mix_ind)
mix_inds = torch.cat(mix_inds, 0)
else:
mix_inds = None
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets, mix_inds)
losses.update(loss_bbox)
# mask head forward and loss
if self.with_mask:
pos_rois = bbox2roi([res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
return losses
def __init__(self,
num_classes,
in_channels,
point_feat_channels=256,
num_points=9,
gradient_mul=0.1,
point_strides=[8, 16, 32, 64, 128],
point_base_scale=4,
loss_cls=dict(type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=1.0),
loss_bbox_init=dict(type='SmoothL1Loss',
beta=1.0 / 9.0,
loss_weight=0.5),
loss_bbox_refine=dict(type='SmoothL1Loss',
beta=1.0 / 9.0,
loss_weight=1.0),
use_grid_points=False,
center_init=True,
transform_method='moment',
moment_mul=0.01,
**kwargs):
self.num_points = num_points
self.point_feat_channels = point_feat_channels
self.use_grid_points = use_grid_points
self.center_init = center_init
# we use deform conv to extract points features
self.dcn_kernel = int(np.sqrt(num_points))
self.dcn_pad = int((self.dcn_kernel - 1) / 2)
assert self.dcn_kernel * self.dcn_kernel == num_points, \
'The points number should be a square number.'
assert self.dcn_kernel % 2 == 1, \
'The points number should be an odd square number.'
dcn_base = np.arange(-self.dcn_pad,
self.dcn_pad + 1).astype(np.float64)
dcn_base_y = np.repeat(dcn_base, self.dcn_kernel)
dcn_base_x = np.tile(dcn_base, self.dcn_kernel)
dcn_base_offset = np.stack([dcn_base_y, dcn_base_x], axis=1).reshape(
(-1))
self.dcn_base_offset = torch.tensor(dcn_base_offset).view(1, -1, 1, 1)
super().__init__(num_classes, in_channels, loss_cls=loss_cls, **kwargs)
self.gradient_mul = gradient_mul
self.point_base_scale = point_base_scale
self.point_strides = point_strides
self.point_generators = [PointGenerator() for _ in self.point_strides]
self.sampling = loss_cls['type'] not in ['FocalLoss']
if self.train_cfg:
self.init_assigner = build_assigner(self.train_cfg.init.assigner)
self.refine_assigner = build_assigner(
self.train_cfg.refine.assigner)
# use PseudoSampler when sampling is False
if self.sampling and hasattr(self.train_cfg, 'sampler'):
sampler_cfg = self.train_cfg.sampler
else:
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
self.transform_method = transform_method
if self.transform_method == 'moment':
self.moment_transfer = nn.Parameter(data=torch.zeros(2),
requires_grad=True)
self.moment_mul = moment_mul
self.use_sigmoid_cls = loss_cls.get('use_sigmoid', False)
if self.use_sigmoid_cls:
self.cls_out_channels = self.num_classes
else:
self.cls_out_channels = self.num_classes + 1
self.loss_bbox_init = build_loss(loss_bbox_init)
self.loss_bbox_refine = build_loss(loss_bbox_refine)
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
# trans gt_masks to gt_obbs
gt_obbs = gt_mask_bp_obbs_list(gt_masks)
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, gt_labels, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# assign gts and sample proposals (hbb assign)
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn[0].assigner)
bbox_sampler = build_sampler(self.train_cfg.rcnn[0].sampler,
context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
## rbbox
rbbox_targets = self.bbox_head.get_target(sampling_results,
gt_masks, gt_labels,
self.train_cfg.rcnn[0])
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*rbbox_targets)
# losses.update(loss_bbox)
for name, value in loss_bbox.items():
losses['s{}.{}'.format(0, name)] = (value)
pos_is_gts = [res.pos_is_gt for res in sampling_results]
roi_labels = rbbox_targets[0]
with torch.no_grad():
# import pdb
# pdb.set_trace()
rotated_proposal_list = self.bbox_head.refine_rbboxes(
roi2droi(rois), roi_labels, bbox_pred, pos_is_gts, img_meta)
# import pdb
# pdb.set_trace()
# assign gts and sample proposals (rbb assign)
if self.with_rbbox:
bbox_assigner = build_assigner(self.train_cfg.rcnn[1].assigner)
bbox_sampler = build_sampler(self.train_cfg.rcnn[1].sampler,
context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
gt_obbs_best_roi = choose_best_Rroi_batch(gt_obbs[i])
assign_result = bbox_assigner.assign(rotated_proposal_list[i],
gt_obbs_best_roi,
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
rotated_proposal_list[i],
torch.from_numpy(gt_obbs_best_roi).float().to(
rotated_proposal_list[i].device),
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
if self.with_rbbox:
# (batch_ind, x_ctr, y_ctr, w, h, angle)
rrois = dbbox2roi([res.bboxes for res in sampling_results])
# feat enlarge
# rrois[:, 3] = rrois[:, 3] * 1.2
# rrois[:, 4] = rrois[:, 4] * 1.4
rrois[:, 3] = rrois[:, 3] * self.rbbox_roi_extractor.w_enlarge
rrois[:, 4] = rrois[:, 4] * self.rbbox_roi_extractor.h_enlarge
rbbox_feats = self.rbbox_roi_extractor(
x[:self.rbbox_roi_extractor.num_inputs], rrois)
if self.with_shared_head_rbbox:
rbbox_feats = self.shared_head_rbbox(rbbox_feats)
cls_score, rbbox_pred = self.rbbox_head(rbbox_feats)
rbbox_targets = self.rbbox_head.get_target_rbbox(
sampling_results, gt_obbs, gt_labels, self.train_cfg.rcnn[1])
loss_rbbox = self.rbbox_head.loss(cls_score, rbbox_pred,
*rbbox_targets)
for name, value in loss_rbbox.items():
losses['s{}.{}'.format(1, name)] = (value)
return losses
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_bboxes_ignore,
gt_labels,
gt_masks=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs)
losses.update(rpn_losses)
proposal_inputs = rpn_outs + (img_meta, self.test_cfg.rpn)
proposal_list = self.rpn_head.get_proposals(*proposal_inputs)
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(
self.train_cfg.rcnn.sampler, context=self)
num_imgs = img.size(0)
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(
proposal_list[i], gt_bboxes[i], gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
pred = self.action__head(bbox_feats,x[:self.bbox_roi_extractor.num_inputs])
loss_bbox = self.action_head.loss(pred,gt_labels)
losses.update(loss_bbox)
# mask head forward and loss
if self.with_mask:
pos_rois = bbox2roi([res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(
sampling_results, gt_masks, self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
return losses
def forward_train_vis(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
losses = dict()
# separate gt
num_imgs = img.size(0)
text_gt_bboxes = []
text_gt_labels = []
char_gt_bboxes = []
char_gt_labels = []
for img_i in range(num_imgs):
text_num = gt_masks[img_i].shape[0]
# text line gt
text_gt_bboxes.append(gt_bboxes[img_i][:text_num])
text_gt_labels.append(gt_labels[img_i][:text_num])
# character gt
char_gt_bboxes.append(gt_bboxes[img_i][text_num:])
char_gt_labels.append(gt_labels[img_i][text_num:])
x = self.extract_feat(img)
# RPN forward and loss
rpn_outs = self.rpn_head(x)
stage_num = len(rpn_outs[0])
# text line proposals
text_rpn_outs = ([], [])
for stage_i in range(stage_num):
text_rpn_outs[0].append(rpn_outs[0][stage_i])
text_rpn_outs[1].append(rpn_outs[1][stage_i])
text_rpn_loss_inputs = text_rpn_outs + (text_gt_bboxes, img_meta,
self.train_cfg.rpn)
text_rpn_losses = self.rpn_head.loss(*text_rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore,
type='text')
losses.update(text_rpn_losses)
text_proposal_inputs = text_rpn_outs + (
img_meta, self.train_cfg.text_rpn_proposal)
text_proposal_list = self.rpn_head.get_bboxes(*text_proposal_inputs,
type='text')
# character proposals
char_rpn_outs = ([], [])
for stage_i in range(stage_num):
char_rpn_outs[0].append(rpn_outs[2][stage_i])
char_rpn_outs[1].append(rpn_outs[3][stage_i])
char_rpn_loss_inputs = char_rpn_outs + (char_gt_bboxes, img_meta,
self.train_cfg.rpn)
char_rpn_losses = self.rpn_head.loss(*char_rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore,
type='char')
losses.update(char_rpn_losses)
char_proposal_inputs = char_rpn_outs + (
img_meta, self.train_cfg.char_rpn_proposal)
char_proposal_list = self.rpn_head.get_bboxes(*char_proposal_inputs,
type='char')
# assign gts and sample proposals
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(self.train_cfg.rcnn.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
text_sampling_results, char_sampling_results = [], []
for i in range(num_imgs):
# sample text line proposals
text_assign_result = bbox_assigner.assign(text_proposal_list[i],
text_gt_bboxes[i],
gt_bboxes_ignore[i],
text_gt_labels[i])
text_sampling_result = bbox_sampler.sample(
text_assign_result,
text_proposal_list[i],
text_gt_bboxes[i],
text_gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
text_sampling_results.append(text_sampling_result)
# sample character proposals
char_assign_result = bbox_assigner.assign(char_proposal_list[i],
char_gt_bboxes[i],
gt_bboxes_ignore[i],
char_gt_labels[i])
char_sampling_result = bbox_sampler.sample(
char_assign_result,
char_proposal_list[i],
char_gt_bboxes[i],
char_gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
char_sampling_results.append(char_sampling_result)
# text detection module
text_rois = bbox2roi([res.bboxes for res in text_sampling_results])
text_bbox_feats = self.text_bbox_roi_extractor(
x[:self.text_bbox_roi_extractor.num_inputs], text_rois)
text_cls_score, text_bbox_pred = self.text_bbox_head(text_bbox_feats)
text_bbox_targets = self.text_bbox_head.get_target(
text_sampling_results, text_gt_bboxes, text_gt_labels,
self.train_cfg.rcnn)
text_loss_bbox = self.text_bbox_head.loss(text_cls_score,
text_bbox_pred,
*text_bbox_targets,
type='text')
losses.update(text_loss_bbox)
pos_rois = bbox2roi([res.pos_bboxes for res in text_sampling_results])
text_mask_feats = self.text_mask_roi_extractor(
x[:self.text_mask_roi_extractor.num_inputs], pos_rois)
mask_pred = self.text_mask_head(text_mask_feats)
mask_targets = self.text_mask_head.get_target(text_sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in text_sampling_results])
loss_mask = self.text_mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
# character-based recognition module
char_rois = bbox2roi([res.bboxes for res in char_sampling_results])
char_bbox_feats = self.char_bbox_roi_extractor(
x[:self.char_bbox_roi_extractor.num_inputs], char_rois)
char_cls_score, char_bbox_pred = self.char_bbox_head(
char_bbox_feats) # the input may be a tuple
char_bbox_targets = self.char_bbox_head.get_target(
char_sampling_results, char_gt_bboxes, char_gt_labels,
self.train_cfg.rcnn)
char_loss_bbox = self.char_bbox_head.loss(char_cls_score,
char_bbox_pred,
*char_bbox_targets,
type='char')
losses.update(char_loss_bbox)
# print(losses)
# exit()
return losses
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
gt_semantic_seg=None):
# change the neck
segm_pred, proto, x = self.extract_feat(img)
losses = dict()
cls_scores, bbox_preds, bbox_embeds = self.bbox_head(x)
outs = (cls_scores, bbox_preds)
loss_inputs = outs + (gt_bboxes, gt_labels, img_metas,
self.train_cfg.bbox_head)
loss_bbox = self.bbox_head.loss(
*loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(loss_bbox)
# proposal
proposal_cfg = self.train_cfg.get('proposals')
proposal_inputs = outs + (bbox_embeds, img_metas, proposal_cfg)
proposal_list = self.bbox_head.get_proposals(*proposal_inputs)
proposal_bbox, proposal_labels, proposal_embeds = map(list, zip(*proposal_list))
# assign gts and sample proposals
assigner = build_assigner(self.train_cfg.mask_head.assigner)
sampler = build_sampler(self.train_cfg.mask_head.sampler,
context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = assigner.assign(
proposal_bbox[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = sampler.sample(
assign_result,
proposal_bbox[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# mask_rois
pos_rois = bbox2roi(
res.pos_bboxes for res in sampling_results)
pos_gt_rois = bbox2roi(
res.pos_gt_bboxes for res in sampling_results)
pos_embed_list = [
proposal_embeds[i][res.pos_inds] for i, res in enumerate(sampling_results)]
pos_embeds = torch.cat(pos_embed_list)
assert pos_embeds.size(0) == pos_gt_rois.size(0)
# crop the rois from proto_masks, then calculate the loss
# using pos_bboxes but not pos_gt_rois
# crop the rois from proto_masks, then calculate the loss
# using pos_bboxes but not pos_gt_rois
mask_targets = self.get_target(sampling_results, gt_masks,
stride=self.train_cfg.proto.final_stride)
mask_preds = self.extract_proto(proto, pos_rois, pos_embeds,
stride=self.train_cfg.proto.stride,
final_stride=self.train_cfg.proto.final_stride)
# for segm
# segm_targets = self.segm_target(segm_pred, gt_semantic_seg)
loss_mask = self.mask_loss(mask_preds, mask_targets,
segm_pred, gt_semantic_seg)
losses.update(loss_mask)
return losses
def forward_train_pair(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
#img: b, 2*c = 6, h, w
b, c, h, w = img.shape
img = img.reshape(-1,c//2,h,w)
#img: 2*b, c, h, w [0,1] , [2,3] , ......
x = self.extract_feat(img)
#x : tuple,5 layer
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
#[cls_score:layer,bchw, bbox_pred, shape_pred, loc_pred]
rpn_outs_half = []
for outs_0 in rpn_outs:
tmp = []
for outs_1 in outs_0:
tmp.append(outs_1[::2,:,:,:])
rpn_outs_half.append(tmp)
rpn_loss_inputs = tuple(rpn_outs_half) + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(
*rpn_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
#copy train img_meta to pair. 1,2,3->1,1,2,2,3,3
img_meta = [img_meta[i//2] for i in range(2*len(img_meta))]
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# proposal_list : batch * [det_bboxes] -> det_bboxes: [n,5] 5: x,y,x,y,score
#generate blank gt for normal img
gt_bboxes_ = []
gt_labels_ = []
for i in range(len(gt_bboxes)):
gt_bboxes_.append(gt_bboxes[i])
gt_bboxes_.append(torch.Tensor([[1,1,1,1]]).to(gt_bboxes[i].device))
gt_labels_.append(gt_labels[i])
gt_labels_.append(torch.Tensor([[0]]).to(gt_labels[i].device))
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(
self.train_cfg.rcnn.sampler, context=self)
assert img.size(0) % 2 == 0
num_pairs = img.size(0) // 2
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_pairs):
i_train = 2*i
i_normal = i_train + 1
assign_result_train = bbox_assigner.assign(proposal_list[i_train],
gt_bboxes_[i_train],
gt_bboxes_ignore[i_train],
gt_labels_[i_train])
assign_result_normal = bbox_assigner.assign(proposal_list[i_normal],
gt_bboxes_[i_normal],
gt_bboxes_ignore[i_normal],
gt_labels_[i_normal])
sampling_result_train, sampling_results_normal = bbox_sampler.pair_sample(
assign_result_train,
assign_result_normal,
proposal_list[i_train],
proposal_list[i_normal],
gt_bboxes_[i_train],
gt_labels_[i_train],
feats_train=[lvl_feat[i_train][None] for lvl_feat in x],
feats_normal=[lvl_feat[i_normal][None] for lvl_feat in x])
sampling_results.append(sampling_result_train)
sampling_results.append(sampling_results_normal)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
# mask head forward and loss
if self.with_mask:
if not self.share_roi_extractor:
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(
res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(
res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds]
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(mask_pred, mask_targets,
pos_labels)
losses.update(loss_mask)
return losses
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
if self.with_bbox:
# assign gts and sample proposals
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(self.train_cfg.rcnn.sampler,
context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
#####dense local regression head ################################
sampling_results = self._random_jitter(sampling_results, img_meta)
pos_rois = bbox2roi([res.pos_bboxes for res in sampling_results])
reg_feats = self.reg_roi_extractor(
x[:self.reg_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
reg_feats = self.shared_head(reg_feats)
# Accelerate training
max_sample_num_reg = self.train_cfg.rcnn.get('max_num_reg', 192)
sample_idx = torch.randperm(
reg_feats.shape[0])[:min(reg_feats.shape[0], max_sample_num_reg
)]
reg_feats = reg_feats[sample_idx]
pos_gt_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
pos_gt_labels = pos_gt_labels[sample_idx]
if self.MASK_ON == False:
#####################instance segmentation############################
reg_pred, reg_masks_pred = self.D2Det_head(reg_feats)
reg_points, reg_targets, reg_masks = self.D2Det_head.get_target(
sampling_results)
reg_targets = reg_targets[sample_idx]
reg_points = reg_points[sample_idx]
reg_masks = reg_masks[sample_idx]
x1 = reg_points[:,
0, :, :] - reg_pred[:,
0, :, :] * reg_points[:,
2, :, :]
x2 = reg_points[:,
0, :, :] + reg_pred[:,
1, :, :] * reg_points[:,
2, :, :]
y1 = reg_points[:,
1, :, :] - reg_pred[:,
2, :, :] * reg_points[:,
3, :, :]
y2 = reg_points[:,
1, :, :] + reg_pred[:,
3, :, :] * reg_points[:,
3, :, :]
pos_decoded_bbox_preds = torch.stack([x1, y1, x2, y2], dim=1)
x1_1 = reg_points[:, 0, :, :] - reg_targets[:, 0, :, :]
x2_1 = reg_points[:, 0, :, :] + reg_targets[:, 1, :, :]
y1_1 = reg_points[:, 1, :, :] - reg_targets[:, 2, :, :]
y2_1 = reg_points[:, 1, :, :] + reg_targets[:, 3, :, :]
pos_decoded_target_preds = torch.stack(
[x1_1, y1_1, x2_1, y2_1], dim=1)
loss_reg = self.loss_roi_reg(
pos_decoded_bbox_preds.permute(0, 2, 3, 1).reshape(-1, 4),
pos_decoded_target_preds.permute(0, 2, 3,
1).reshape(-1, 4),
weight=reg_masks.reshape(-1, 1))
loss_mask = self.loss_roi_mask(
reg_masks_pred.reshape(
-1, reg_masks.shape[2] * reg_masks.shape[3]),
reg_masks.reshape(-1,
reg_masks.shape[2] * reg_masks.shape[3]))
losses.update(dict(loss_reg=loss_reg, loss_mask=loss_mask))
#############################################
else:
#####################object detection############################
reg_pred, reg_masks_pred, reg_instances_pred, reg_iou = self.D2Det_head(
reg_feats, pos_gt_labels)
reg_points, reg_targets, reg_masks, reg_instances = self.D2Det_head.get_target_mask(
sampling_results, gt_masks, self.train_cfg.rcnn)
reg_targets = reg_targets[sample_idx]
reg_points = reg_points[sample_idx]
reg_masks = reg_masks[sample_idx]
reg_instances = reg_instances[sample_idx]
x1 = reg_points[:,
0, :, :] - reg_pred[:,
0, :, :] * reg_points[:,
2, :, :]
x2 = reg_points[:,
0, :, :] + reg_pred[:,
1, :, :] * reg_points[:,
2, :, :]
y1 = reg_points[:,
1, :, :] - reg_pred[:,
2, :, :] * reg_points[:,
3, :, :]
y2 = reg_points[:,
1, :, :] + reg_pred[:,
3, :, :] * reg_points[:,
3, :, :]
pos_decoded_bbox_preds = torch.stack([x1, y1, x2, y2], dim=1)
x1_1 = reg_points[:, 0, :, :] - reg_targets[:, 0, :, :]
x2_1 = reg_points[:, 0, :, :] + reg_targets[:, 1, :, :]
y1_1 = reg_points[:, 1, :, :] - reg_targets[:, 2, :, :]
y2_1 = reg_points[:, 1, :, :] + reg_targets[:, 3, :, :]
pos_decoded_target_preds = torch.stack(
[x1_1, y1_1, x2_1, y2_1], dim=1)
loss_reg = self.loss_roi_reg(
pos_decoded_bbox_preds.permute(0, 2, 3, 1).reshape(-1, 4),
pos_decoded_target_preds.permute(0, 2, 3,
1).reshape(-1, 4),
weight=reg_masks.reshape(-1, 1))
loss_mask = self.loss_roi_mask(
reg_masks_pred.reshape(
-1, reg_masks.shape[1] * reg_masks.shape[2]),
reg_masks.reshape(-1,
reg_masks.shape[1] * reg_masks.shape[2]))
loss_instance = self.loss_roi_instance(reg_instances_pred,
reg_instances,
pos_gt_labels)
reg_iou_targets = self.D2Det_head.get_target_maskiou(
sampling_results, gt_masks,
reg_instances_pred[pos_gt_labels > 0, pos_gt_labels],
reg_instances, sample_idx)
reg_iou_weights = ((reg_iou_targets > 0.1) &
(reg_iou_targets <= 1.0)).float()
loss_iou = self.loss_iou(reg_iou[pos_gt_labels > 0,
pos_gt_labels],
reg_iou_targets,
weight=reg_iou_weights)
losses.update(
dict(loss_reg=loss_reg,
loss_mask=loss_mask,
loss_instance=loss_instance,
loss_iou=loss_iou))
#############################################
return losses
def __init__(self,
num_classes=80,
in_channels=(512, 1024, 512, 256, 256, 256),
anchor_generator=dict(type='SSDAnchorGenerator',
scale_major=False,
input_size=300,
strides=[8, 16, 32, 64, 100, 300],
ratios=([2], [2,
3], [2,
3], [2,
3], [2], [2]),
basesize_ratio_range=(0.1, 0.9)),
background_label=None,
bbox_coder=dict(
type='DeltaXYWHBBoxCoder',
target_means=[.0, .0, .0, .0],
target_stds=[1.0, 1.0, 1.0, 1.0],
),
reg_decoded_bbox=False,
train_cfg=None,
test_cfg=None):
super(AnchorHead, self).__init__()
self.num_classes = num_classes
self.in_channels = in_channels
self.cls_out_channels = num_classes + 1 # add background class
self.anchor_generator = build_anchor_generator(anchor_generator)
num_anchors = self.anchor_generator.num_base_anchors
reg_convs = []
cls_convs = []
for i in range(len(in_channels)):
reg_convs.append(
nn.Conv2d(in_channels[i],
num_anchors[i] * 4,
kernel_size=3,
padding=1))
cls_convs.append(
nn.Conv2d(in_channels[i],
num_anchors[i] * (num_classes + 1),
kernel_size=3,
padding=1))
self.reg_convs = nn.ModuleList(reg_convs)
self.cls_convs = nn.ModuleList(cls_convs)
self.background_label = (num_classes if background_label is None else
background_label)
# background_label should be either 0 or num_classes
assert (self.background_label == 0
or self.background_label == num_classes)
self.bbox_coder = build_bbox_coder(bbox_coder)
self.reg_decoded_bbox = reg_decoded_bbox
self.use_sigmoid_cls = False
self.cls_focal_loss = False
self.train_cfg = train_cfg
self.test_cfg = test_cfg
# set sampling=False for archor_target
self.sampling = False
if self.train_cfg:
self.assigner = build_assigner(self.train_cfg.assigner)
# SSD sampling=False so use PseudoSampler
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
self.fp16_enabled = False
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_pids,
ref_img,
ref_bboxes,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(self.train_cfg.rcnn.sampler,
context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes[i],
gt_bboxes_ignore[i],
gt_labels[i], gt_pids[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
gt_pids[i],
ref_bboxes[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# bbox_img_n = [res.bboxes.size(0) for res in sampling_results]
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets)
losses.update(loss_bbox)
ref_x = self.extract_feat(ref_img)
if self.with_prop_track:
"""Difference between this implementation and the
paper `Detect to Track and Track to Detect`:
1. Based on FPN Faster R-CNN instead of R-FCN, that means:
a. Correlations are implemented on specific levels.
b. Contacted features for TrackHead is from backbone/neck.
2. Training with positive proposals instead of only gts.
"""
track_x = self.extract_corr_feat(x, ref_x)
# TODO consider training use gt or (gt + props)[NOW]
# TODO consider whether to include semantic consistence[NO]
# TODO consider how to calculate the correlation features
pos_rois = bbox2roi([res.pos_bboxes for res in sampling_results])
prop_track_feats = self.prop_track_roi_extractor(
track_x[:self.prop_track_roi_extractor.num_inputs], pos_rois)
prop_cls, prop_reg = self.prop_track_head(prop_track_feats)
prop_targets = self.prop_track_head.get_target(
sampling_results, self.train_cfg.rcnn)
loss_prop_track = self.prop_track_head.loss(
prop_cls, prop_reg, *prop_targets)
losses.update(loss_prop_track)
if self.with_asso_track:
"""Associate tracking, based on appearance features.
"""
ref_rois = bbox2roi(ref_bboxes)
num_bbox_x = [res.bboxes.size(0) for res in sampling_results]
num_bbox_ref_x = [res.size(0) for res in ref_bboxes]
bbox_feats = self.asso_track_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
ref_bbox_feats = self.asso_track_roi_extractor(
ref_x[:self.asso_track_roi_extractor.num_inputs], ref_rois)
asso_probs = self.asso_track_head(bbox_feats, ref_bbox_feats,
num_bbox_x, num_bbox_ref_x)
asso_targets = self.asso_track_head.get_target(
sampling_results, self.train_cfg.track)
loss_asso_track = self.asso_track_head.loss(
asso_probs, *asso_targets)
losses.update(loss_asso_track)
return losses
def __init__(
self,
num_classes,
in_channels,
feat_channels=256,
approx_anchor_generator=dict(
type='AnchorGenerator',
octave_base_scale=8,
scales_per_octave=3,
ratios=[0.5, 1.0, 2.0],
strides=[4, 8, 16, 32, 64]),
square_anchor_generator=dict(
type='AnchorGenerator',
ratios=[1.0],
scales=[8],
strides=[4, 8, 16, 32, 64]),
anchor_coder=dict(
type='DeltaXYWHBBoxCoder',
target_means=[.0, .0, .0, .0],
target_stds=[1.0, 1.0, 1.0, 1.0]
),
bbox_coder=dict(
type='DeltaXYWHBBoxCoder',
target_means=[.0, .0, .0, .0],
target_stds=[1.0, 1.0, 1.0, 1.0]
),
reg_decoded_bbox=False,
deform_groups=4,
loc_filter_thr=0.01,
train_cfg=None,
test_cfg=None,
loss_loc=dict(
type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=1.0),
loss_shape=dict(type='BoundedIoULoss', beta=0.2, loss_weight=1.0),
loss_cls=dict(
type='CrossEntropyLoss', use_sigmoid=True, loss_weight=1.0),
loss_bbox=dict(type='SmoothL1Loss', beta=1.0,
loss_weight=1.0)): # yapf: disable
super(AnchorHead, self).__init__()
self.in_channels = in_channels
self.num_classes = num_classes
self.feat_channels = feat_channels
self.deform_groups = deform_groups
self.loc_filter_thr = loc_filter_thr
# build approx_anchor_generator and square_anchor_generator
assert (approx_anchor_generator['octave_base_scale'] ==
square_anchor_generator['scales'][0])
assert (approx_anchor_generator['strides'] ==
square_anchor_generator['strides'])
self.approx_anchor_generator = build_anchor_generator(
approx_anchor_generator)
self.square_anchor_generator = build_anchor_generator(
square_anchor_generator)
self.approxs_per_octave = self.approx_anchor_generator \
.num_base_anchors[0]
self.reg_decoded_bbox = reg_decoded_bbox
# one anchor per location
self.num_anchors = 1
self.use_sigmoid_cls = loss_cls.get('use_sigmoid', False)
self.loc_focal_loss = loss_loc['type'] in ['FocalLoss']
self.sampling = loss_cls['type'] not in ['FocalLoss']
self.ga_sampling = train_cfg is not None and hasattr(
train_cfg, 'ga_sampler')
if self.use_sigmoid_cls:
self.cls_out_channels = self.num_classes
else:
self.cls_out_channels = self.num_classes + 1
# build bbox_coder
self.anchor_coder = build_bbox_coder(anchor_coder)
self.bbox_coder = build_bbox_coder(bbox_coder)
# build losses
self.loss_loc = build_loss(loss_loc)
self.loss_shape = build_loss(loss_shape)
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
self.train_cfg = train_cfg
self.test_cfg = test_cfg
if self.train_cfg:
self.assigner = build_assigner(self.train_cfg.assigner)
# use PseudoSampler when sampling is False
if self.sampling and hasattr(self.train_cfg, 'sampler'):
sampler_cfg = self.train_cfg.sampler
else:
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
self.ga_assigner = build_assigner(self.train_cfg.ga_assigner)
if self.ga_sampling:
ga_sampler_cfg = self.train_cfg.ga_sampler
else:
ga_sampler_cfg = dict(type='PseudoSampler')
self.ga_sampler = build_sampler(ga_sampler_cfg, context=self)
self.fp16_enabled = False
self._init_layers()
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
gt_semantic_seg=None,
gt_semantic_seg_Nx=None,
proposals=None,
ref_img=None, # images of reference frame
ref_bboxes=None, # gt bbox of reference frame
ref_labels=None,
ref_masks=None,
ref_semantic_seg=None,
ref_semantic_seg_Nx=None,
ref_obj_ids=None,
gt_pids=None, # gt ids of target objs mapped to reference objs
gt_obj_ids=None,
# gt_flow=None,
):
losses = dict()
# ********************************
# Initial Flow and Feature Warping
# ********************************
flowR2T, _ = self.compute_flow(img.clone(), ref_img.clone(), scale_factor=0.25)
x = self.extract_feat(img)
ref_x = self.extract_feat(ref_img)
x = self.extra_neck(x, ref_x, flowR2T)
# **********************************
# FCN Semantic Head forward and loss
# **********************************
if hasattr(self, 'panopticFPN') and self.panopticFPN is not None:
#### semantic FCN GT
gt_semantic_seg = gt_semantic_seg.long()
gt_semantic_seg = gt_semantic_seg.squeeze(1)
fcn_output, fcn_score = self.panopticFPN(
x[0:self.panopticFPN.num_levels])
loss_fcn = F.cross_entropy(
fcn_output, gt_semantic_seg, ignore_index=255)
loss_fcn = {'loss_segm': loss_fcn}
losses.update(loss_fcn)
# ***************************
# RPN forward and loss
# ***************************
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(
*rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# *******************************
# assign gts and sample proposals
# *******************************
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(
self.train_cfg.rcnn.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(
proposal_list[i], gt_bboxes[i],
gt_bboxes_ignore[i], gt_labels[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes[i],
gt_labels[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# *******************************
# bbox head forward and loss
# *******************************
if self.with_bbox:
rois = bbox2roi([res.bboxes for res in sampling_results])
# TODO: a more flexible decision which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
bbox_targets = self.bbox_head.get_target(
sampling_results, gt_bboxes,
gt_labels, self.train_cfg.rcnn)
loss_bbox = self.bbox_head.loss(
cls_score, bbox_pred, *bbox_targets)
losses.update(loss_bbox)
# *******************************
# mask head forward and loss
# *******************************
if self.with_mask:
if not self.share_roi_extractor:
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(
res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(
res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds]
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(
sampling_results, gt_masks, self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = self.mask_head.loss(
mask_pred, mask_targets, pos_labels)
losses.update(loss_mask)
# ***************************************
# PANOPTIC HEAD - Only for BATCH SIZE: 1
# ***************************************
if hasattr(self.train_cfg, 'loss_pano_weight'):
# extract gt rois for panpotic head
gt_rois = bbox2roi(gt_bboxes) # [#bbox, 5]
cls_idx = gt_labels[0] # [#bbox] / batch_size must be 1
# fcn_score # [1,20,200,400]
# compute mask logits with gt rois
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], gt_rois)
# [#bbox,256,14,14]
mask_score = self.mask_head(mask_feats) # [#bbox,#things+1,28,28], #things+1=9
nobj,_,H,W = mask_score.shape
mask_score = mask_score.gather(
1, cls_idx.view(-1,1,1,1).expand(-1,-1,H,W))
# [#bbox,1,28,28]
# compute panoptic logits
seg_stuff_logits, seg_inst_logits = self.seg_term(
cls_idx, fcn_score, gt_rois)
mask_logits = self.mask_term(
mask_score, gt_rois, cls_idx, fcn_score)
# panoptic_logits: [1,#stuff+#bbox,200,400]
panoptic_logits = torch.cat(
[seg_stuff_logits, (seg_inst_logits + mask_logits)],
dim=1)
# generate gt for panoptic head
# added for panoptic gt generation : gt_masks_4x
gt_masks_4x = gt_masks[0][:,::4,::4]
with torch.no_grad():
# gt_semantic_seg_Nx[0] [1,200,400],
# gt_masks_4x [#bbox,200,400]
panoptic_gt = self.mask_matching(
gt_semantic_seg_Nx[0], gt_masks_4x)
panoptic_gt = panoptic_gt.long()
panoptic_loss = F.cross_entropy(
panoptic_logits, panoptic_gt, ignore_index = 255)
pano_loss = {'loss_pano': panoptic_loss * self.train_cfg.loss_pano_weight}
losses.update(pano_loss)
return losses
def forward_train(self,
imgs,
img_meta,
imgs_2,
img_meta_2,
gt_bboxes,
gt_bboxes_2,
gt_labels,
gt_labels_2,
gt_bboxes_ignore=None,
gt_masks=None,
gt_masks_2=None,
proposals=None):
# self.print_iterations()
assert imgs.shape[
1] == 3 and imgs_2.shape[1] == 3 # make sure channel size is 3
x = self.extract_feat(imgs)
x_2 = self.extract_feat(imgs_2)
losses = dict()
# RPN forward and loss
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_outs_2 = self.rpn_head(x_2)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_loss_inputs_2 = rpn_outs_2 + (gt_bboxes_2, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore,
iteration=self.iteration)
rpn_losses_2 = self.rpn_head.loss(
*rpn_loss_inputs_2,
gt_bboxes_ignore=gt_bboxes_ignore,
iteration=self.iteration,
img_meta_2=img_meta_2)
losses.update(rpn_losses)
losses.update(rpn_losses_2)
proposal_inputs = rpn_outs + (img_meta,
self.train_cfg.rpn_proposal)
proposal_inputs_2 = rpn_outs_2 + (img_meta,
self.train_cfg.rpn_proposal)
proposal_list, anchors = self.rpn_head.get_bboxes(*proposal_inputs)
proposal_list_2, anchors_2 = self.rpn_head.get_bboxes(
*proposal_inputs_2, img_meta_2=img_meta_2)
# self.rpn_head.visualize_anchor_boxes(imgs, rpn_outs[0], img_meta, slice_num=45, shuffle=True) # debug only
# self.visualize_proposals(imgs, proposal_list, gt_bboxes, img_meta, slice_num=None, isProposal=True) #debug only
# self.visualize_proposals(imgs, anchors, gt_bboxes, img_meta, slice_num=None, isProposal=False) #debug only
# self.visualize_gt_bboxes(imgs, gt_bboxes, img_meta) #debug only
# breakpoint()
# self.visualize_gt_bboxes(imgs_2, gt_bboxes_2, img_meta_2) #debug only
# breakpoint()
# self.visualize_gt_bboxes_masks(imgs, gt_bboxes, img_meta, gt_masks) # debug only
else:
proposal_list = proposals
# assign gts and sample proposals
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(self.train_cfg.rcnn.sampler,
context=self)
num_imgs = imgs.size(0)
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
gt_bboxes_cur_pat = gt_bboxes[i]
gt_bboxes_ignore_cur_pat = gt_bboxes_ignore[i]
gt_labels_cur_pat = gt_labels[i]
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes_cur_pat,
gt_bboxes_ignore_cur_pat,
gt_labels_cur_pat)
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes_cur_pat,
gt_labels_cur_pat,
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
bbox_assigner_2 = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler_2 = build_sampler(self.train_cfg.rcnn.sampler,
context=self)
num_imgs_2 = imgs_2.size(0)
gt_bboxes_ignore_2 = [None for _ in range(num_imgs_2)]
sampling_results_2 = []
for i in range(num_imgs_2):
gt_bboxes_cur_pat_2 = gt_bboxes_2[i]
gt_bboxes_ignore_cur_pat_2 = gt_bboxes_ignore_2[i]
gt_labels_cur_pat_2 = gt_labels_2[i]
assign_result_2 = bbox_assigner_2.assign(
proposal_list_2[i], gt_bboxes_cur_pat_2,
gt_bboxes_ignore_cur_pat_2, gt_labels_cur_pat_2)
sampling_result_2 = bbox_sampler_2.sample(
assign_result_2,
proposal_list_2[i],
gt_bboxes_cur_pat_2,
gt_labels_cur_pat_2,
feats=[lvl_feat[i][None] for lvl_feat in x_2])
sampling_results_2.append(sampling_result_2)
# bbox head forward and loss
if self.with_bbox:
rois = bbox2roi3D([res.bboxes for res in sampling_results])
rois_2 = bbox2roi3D([res.bboxes for res in sampling_results_2])
# TODO: a more flexible way to decide which feature maps to use
bbox_feats = self.bbox_roi_extractor(
x[:self.bbox_roi_extractor.num_inputs], rois)
bbox_feats_2 = self.bbox_roi_extractor(
x_2[:self.bbox_roi_extractor.num_inputs], rois_2)
cls_score, bbox_pred = self.bbox_head(bbox_feats)
cls_score_2, bbox_pred_2 = self.bbox_head(bbox_feats_2)
cls_score = torch.cat((cls_score, cls_score_2), 0)
bbox_pred = torch.cat((bbox_pred, bbox_pred_2), 0)
bbox_targets = self.bbox_head.get_target(sampling_results,
gt_bboxes, gt_labels,
self.train_cfg.rcnn)
bbox_targets_2 = self.bbox_head.get_target(sampling_results_2,
gt_bboxes_2,
gt_labels_2,
self.train_cfg.rcnn)
bbox_targets_combined = []
for bbox_target, bbox_target_2 in zip(bbox_targets,
bbox_targets_2):
bbox_targets_combined.append(
torch.cat((bbox_target, bbox_target_2), 0))
bbox_targets_combined = tuple(bbox_targets_combined)
loss_bbox = self.bbox_head.loss(cls_score, bbox_pred,
*bbox_targets_combined)
losses.update(loss_bbox)
# prepare upscaled data for refinement head
upscaled_factor = img_meta_2[0]['ori_shape'][0] / img_meta[0][
'ori_shape'][0]
# convert parameterized adjustments to actual bounding boxes coordinates
pred_bboxes_2 = self.bbox_head.convert_adjustments_to_bboxes(
rois_2, bbox_pred_2, img_meta_2[0]
['img_shape'])[:, 6:].cpu().detach().numpy() / upscaled_factor
pred_cls_score_2 = cls_score_2[:, 1, None].cpu().detach().numpy()
pred_bboxes_2 = np.concatenate((pred_bboxes_2, pred_cls_score_2),
axis=1)
pred_bboxes_2 = [torch.from_numpy(pred_bboxes_2).cuda()]
bbox_assigner = build_assigner(self.train_cfg.rcnn.assigner)
bbox_sampler = build_sampler(self.train_cfg.rcnn.sampler,
context=self)
num_imgs = imgs.size(0)
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results_refinement = []
for i in range(num_imgs):
gt_bboxes_cur_pat = gt_bboxes[i]
gt_bboxes_ignore_cur_pat = gt_bboxes_ignore[i]
gt_labels_cur_pat = gt_labels[i]
assign_result = bbox_assigner.assign(pred_bboxes_2[i],
gt_bboxes_cur_pat,
gt_bboxes_ignore_cur_pat,
gt_labels_cur_pat)
sampling_result = bbox_sampler.sample(
assign_result,
pred_bboxes_2[i],
gt_bboxes_cur_pat,
gt_labels_cur_pat,
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results_refinement.append(sampling_result)
rois_refinement = bbox2roi3D(
[res.bboxes for res in sampling_results_refinement])
bbox_feats_refinement = self.bbox_roi_extractor_refinement(
x[:self.bbox_roi_extractor_refinement.num_inputs],
rois_refinement)
# training refinement head
refined_bbox_pred = self.refinement_head(bbox_feats_refinement)
bbox_targets_refinement = self.refinement_head.get_target(
sampling_results_refinement, gt_bboxes, gt_labels,
self.train_cfg.rcnn)
loss_refinement = self.refinement_head.loss(
refined_bbox_pred, *bbox_targets_refinement)
losses.update(loss_refinement)
# mask head forward and loss
if self.with_mask:
pos_rois = bbox2roi3D([res.pos_bboxes for res in sampling_results])
mask_feats = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois)
mask_pred = self.mask_head(mask_feats)
mask_targets = self.mask_head.get_target(sampling_results,
gt_masks,
self.train_cfg.rcnn)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
pos_rois_refined = bbox2roi3D(
[res.pos_bboxes for res in sampling_results_refinement])
mask_feats_refined = self.mask_roi_extractor(
x[:self.mask_roi_extractor.num_inputs], pos_rois_refined)
mask_pred_refined = self.mask_head(mask_feats_refined)
mask_targets_refined = self.mask_head.get_target(
sampling_results_refinement, gt_masks, self.train_cfg.rcnn)
pos_labels_refined = torch.cat(
[res.pos_gt_labels for res in sampling_results_refinement])
mask_pred_combined = torch.cat((mask_pred, mask_pred_refined))
mask_targets_combined = torch.cat(
(mask_targets, mask_targets_refined))
pos_labels_combined = torch.cat((pos_labels, pos_labels_refined))
loss_mask = self.mask_head.loss(mask_pred_combined,
mask_targets_combined,
pos_labels_combined)
losses.update(loss_mask)
# self.save_losses_plt(losses) #debug only...
self.iteration += 1
return losses
def __init__(self,
in_channels,
feat_channels,
out_channels,
num_things_classes=80,
num_stuff_classes=53,
num_queries=100,
pixel_decoder=None,
enforce_decoder_input_project=False,
transformer_decoder=None,
positional_encoding=None,
loss_cls=dict(type='CrossEntropyLoss',
use_sigmoid=False,
loss_weight=1.0,
class_weight=[1.0] * 133 + [0.1]),
loss_mask=dict(type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=20.0),
loss_dice=dict(type='DiceLoss',
use_sigmoid=True,
activate=True,
naive_dice=True,
loss_weight=1.0),
train_cfg=None,
test_cfg=None,
init_cfg=None,
**kwargs):
super(AnchorFreeHead, self).__init__(init_cfg)
self.num_things_classes = num_things_classes
self.num_stuff_classes = num_stuff_classes
self.num_classes = self.num_things_classes + self.num_stuff_classes
self.num_queries = num_queries
pixel_decoder.update(in_channels=in_channels,
feat_channels=feat_channels,
out_channels=out_channels)
self.pixel_decoder = build_plugin_layer(pixel_decoder)[1]
self.transformer_decoder = build_transformer_layer_sequence(
transformer_decoder)
self.decoder_embed_dims = self.transformer_decoder.embed_dims
pixel_decoder_type = pixel_decoder.get('type')
if pixel_decoder_type == 'PixelDecoder' and (
self.decoder_embed_dims != in_channels[-1]
or enforce_decoder_input_project):
self.decoder_input_proj = Conv2d(in_channels[-1],
self.decoder_embed_dims,
kernel_size=1)
else:
self.decoder_input_proj = nn.Identity()
self.decoder_pe = build_positional_encoding(positional_encoding)
self.query_embed = nn.Embedding(self.num_queries, out_channels)
self.cls_embed = nn.Linear(feat_channels, self.num_classes + 1)
self.mask_embed = nn.Sequential(
nn.Linear(feat_channels, feat_channels), nn.ReLU(inplace=True),
nn.Linear(feat_channels, feat_channels), nn.ReLU(inplace=True),
nn.Linear(feat_channels, out_channels))
self.test_cfg = test_cfg
self.train_cfg = train_cfg
if train_cfg:
self.assigner = build_assigner(train_cfg.assigner)
self.sampler = build_sampler(train_cfg.sampler, context=self)
self.class_weight = loss_cls.class_weight
self.loss_cls = build_loss(loss_cls)
self.loss_mask = build_loss(loss_mask)
self.loss_dice = build_loss(loss_dice)
def __init__(self,
num_classes,
in_channels,
stacked_convs=4,
feat_channels=256,
approx_anchor_generator=dict(
type='AnchorGenerator',
octave_base_scale=4,
scales_per_octave=3,
ratios=[0.5, 1.0, 2.0],
strides=[8, 16, 32, 64, 128]),
square_anchor_generator=dict(
type='AnchorGenerator',
ratios=[1.0],
scales=[4],
strides=[8, 16, 32, 64, 128]),
conv_cfg=None,
norm_cfg=None,
bbox_coder=dict(
type='BucketingBBoxCoder',
num_buckets=14,
scale_factor=3.0),
reg_decoded_bbox=False,
background_label=None,
train_cfg=None,
test_cfg=None,
loss_cls=dict(
type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=1.0),
loss_bbox_cls=dict(
type='CrossEntropyLoss',
use_sigmoid=True,
loss_weight=1.5),
loss_bbox_reg=dict(
type='SmoothL1Loss', beta=1.0 / 9.0, loss_weight=1.5)):
super(SABLRetinaHead, self).__init__()
self.in_channels = in_channels
self.num_classes = num_classes
self.feat_channels = feat_channels
self.num_buckets = bbox_coder['num_buckets']
self.side_num = int(np.ceil(self.num_buckets / 2))
assert (approx_anchor_generator['octave_base_scale'] ==
square_anchor_generator['scales'][0])
assert (approx_anchor_generator['strides'] ==
square_anchor_generator['strides'])
self.approx_anchor_generator = build_anchor_generator(
approx_anchor_generator)
self.square_anchor_generator = build_anchor_generator(
square_anchor_generator)
self.approxs_per_octave = (
self.approx_anchor_generator.num_base_anchors[0])
# one anchor per location
self.num_anchors = 1
self.stacked_convs = stacked_convs
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.reg_decoded_bbox = reg_decoded_bbox
self.background_label = (
num_classes if background_label is None else background_label)
self.use_sigmoid_cls = loss_cls.get('use_sigmoid', False)
self.sampling = loss_cls['type'] not in [
'FocalLoss', 'GHMC', 'QualityFocalLoss'
]
if self.use_sigmoid_cls:
self.cls_out_channels = num_classes
else:
self.cls_out_channels = num_classes + 1
self.bbox_coder = build_bbox_coder(bbox_coder)
self.loss_cls = build_loss(loss_cls)
self.loss_bbox_cls = build_loss(loss_bbox_cls)
self.loss_bbox_reg = build_loss(loss_bbox_reg)
self.train_cfg = train_cfg
self.test_cfg = test_cfg
if self.train_cfg:
self.assigner = build_assigner(self.train_cfg.assigner)
# use PseudoSampler when sampling is False
if self.sampling and hasattr(self.train_cfg, 'sampler'):
sampler_cfg = self.train_cfg.sampler
else:
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
self.fp16_enabled = False
self._init_layers()
def __init__(self,
num_classes,
in_channels,
num_fcs=2,
transformer=dict(
type='Transformer',
embed_dims=256,
num_heads=8,
num_encoder_layers=6,
num_decoder_layers=6,
feedforward_channels=2048,
dropout=0.1,
act_cfg=dict(type='ReLU', inplace=True),
norm_cfg=dict(type='LN'),
num_fcs=2,
pre_norm=False,
return_intermediate_dec=True),
positional_encoding=dict(
type='SinePositionalEncoding',
num_feats=128,
normalize=True),
loss_cls=dict(
type='CrossEntropyLoss',
bg_cls_weight=0.1,
use_sigmoid=False,
loss_weight=1.0,
class_weight=1.0),
loss_bbox=dict(type='L1Loss', loss_weight=5.0),
loss_iou=dict(type='GIoULoss', loss_weight=2.0),
train_cfg=dict(
assigner=dict(
type='HungarianAssigner',
cls_weight=1.,
bbox_weight=5.,
iou_weight=2.,
iou_calculator=dict(type='BboxOverlaps2D'),
iou_mode='giou')),
test_cfg=dict(max_per_img=100),
**kwargs):
# NOTE here use `AnchorFreeHead` instead of `TransformerHead`,
# since it brings inconvenience when the initialization of
# `AnchorFreeHead` is called.
super(AnchorFreeHead, self).__init__()
use_sigmoid_cls = loss_cls.get('use_sigmoid', False)
assert not use_sigmoid_cls, 'setting use_sigmoid_cls as True is ' \
'not supported in DETR, since background is needed for the ' \
'matching process.'
assert 'embed_dims' in transformer \
and 'num_feats' in positional_encoding
num_feats = positional_encoding['num_feats']
embed_dims = transformer['embed_dims']
assert num_feats * 2 == embed_dims, 'embed_dims should' \
f' be exactly 2 times of num_feats. Found {embed_dims}' \
f' and {num_feats}.'
assert test_cfg is not None and 'max_per_img' in test_cfg
class_weight = loss_cls.get('class_weight', None)
if class_weight is not None:
assert isinstance(class_weight, float), 'Expected ' \
'class_weight to have type float. Found ' \
f'{type(class_weight)}.'
# NOTE following the official DETR rep0, bg_cls_weight means
# relative classification weight of the no-object class.
bg_cls_weight = loss_cls.get('bg_cls_weight', class_weight)
assert isinstance(bg_cls_weight, float), 'Expected ' \
'bg_cls_weight to have type float. Found ' \
f'{type(bg_cls_weight)}.'
class_weight = torch.ones(num_classes + 1) * class_weight
# set background class as the last indice
class_weight[num_classes] = bg_cls_weight
loss_cls.update({'class_weight': class_weight})
if 'bg_cls_weight' in loss_cls:
loss_cls.pop('bg_cls_weight')
self.bg_cls_weight = bg_cls_weight
if train_cfg:
assert 'assigner' in train_cfg, 'assigner should be provided '\
'when train_cfg is set.'
assigner = train_cfg['assigner']
assert loss_cls['loss_weight'] == assigner['cls_weight'], \
'The classification weight for loss and matcher should be' \
'exactly the same.'
assert loss_bbox['loss_weight'] == assigner['bbox_weight'], \
'The regression L1 weight for loss and matcher should be' \
'exactly the same.'
assert loss_iou['loss_weight'] == assigner['iou_weight'], \
'The regression iou weight for loss and matcher should be' \
'exactly the same.'
self.assigner = build_assigner(assigner)
# DETR sampling=False, so use PseudoSampler
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
self.num_classes = num_classes
self.cls_out_channels = num_classes + 1
self.in_channels = in_channels
self.num_fcs = num_fcs
self.train_cfg = train_cfg
self.test_cfg = test_cfg
self.use_sigmoid_cls = use_sigmoid_cls
self.embed_dims = embed_dims
self.num_query = test_cfg['max_per_img']
self.fp16_enabled = False
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
self.loss_iou = build_loss(loss_iou)
self.act_cfg = transformer.get('act_cfg',
dict(type='ReLU', inplace=True))
self.activate = build_activation_layer(self.act_cfg)
self.positional_encoding = build_positional_encoding(
positional_encoding)
self.transformer = build_transformer(transformer)
self._init_layers()
def __init__(self,
num_classes,
in_channels,
feat_channels=256,
stacked_convs=2,
strides=[8, 16, 32],
use_depthwise=False,
dcn_on_last_conv=False,
conv_bias='auto',
conv_cfg=None,
norm_cfg=dict(type='BN', momentum=0.03, eps=0.001),
act_cfg=dict(type='Swish'),
loss_cls=dict(type='CrossEntropyLoss',
use_sigmoid=True,
reduction='sum',
loss_weight=1.0),
loss_bbox=dict(type='IoULoss',
mode='square',
eps=1e-16,
reduction='sum',
loss_weight=5.0),
loss_obj=dict(type='CrossEntropyLoss',
use_sigmoid=True,
reduction='sum',
loss_weight=1.0),
loss_l1=dict(type='L1Loss', reduction='sum', loss_weight=1.0),
train_cfg=None,
test_cfg=None,
init_cfg=dict(type='Kaiming',
layer='Conv2d',
a=math.sqrt(5),
distribution='uniform',
mode='fan_in',
nonlinearity='leaky_relu')):
super().__init__(init_cfg=init_cfg)
self.num_classes = num_classes
self.cls_out_channels = num_classes
self.in_channels = in_channels
self.feat_channels = feat_channels
self.stacked_convs = stacked_convs
self.strides = strides
self.use_depthwise = use_depthwise
self.dcn_on_last_conv = dcn_on_last_conv
assert conv_bias == 'auto' or isinstance(conv_bias, bool)
self.conv_bias = conv_bias
self.use_sigmoid_cls = True
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.act_cfg = act_cfg
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
self.loss_obj = build_loss(loss_obj)
self.use_l1 = False # This flag will be modified by hooks.
self.loss_l1 = build_loss(loss_l1)
self.prior_generator = MlvlPointGenerator(strides, offset=0)
self.test_cfg = test_cfg
self.train_cfg = train_cfg
self.sampling = False
if self.train_cfg:
self.assigner = build_assigner(self.train_cfg.assigner)
# sampling=False so use PseudoSampler
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
self.fp16_enabled = False
self._init_layers()
def __init__(self,
num_classes,
in_channels,
feat_channels=256,
anchor_generator=dict(type='AnchorGenerator',
scales=[8, 16, 32],
ratios=[0.5, 1.0, 2.0],
strides=[4, 8, 16, 32, 64]),
bbox_coder=dict(type='DeltaXYWHBBoxCoder',
target_means=(.0, .0, .0, .0),
target_stds=(1.0, 1.0, 1.0, 1.0)),
reg_decoded_bbox=False,
background_label=None,
loss_cls=dict(type='CrossEntropyLoss',
use_sigmoid=True,
loss_weight=1.0),
loss_bbox=dict(type='SmoothL1Loss',
beta=1.0 / 9.0,
loss_weight=1.0),
train_cfg=None,
test_cfg=None):
super(AnchorHead, self).__init__()
self.in_channels = in_channels
self.num_classes = num_classes
self.feat_channels = feat_channels
self.use_sigmoid_cls = loss_cls.get('use_sigmoid', False)
# TODO better way to determine whether sample or not
self.sampling = loss_cls['type'] not in [
'FocalLoss', 'GHMC', 'QualityFocalLoss'
]
if self.use_sigmoid_cls:
self.cls_out_channels = num_classes
else:
self.cls_out_channels = num_classes + 1
if self.cls_out_channels <= 0:
raise ValueError(f'num_classes={num_classes} is too small')
self.reg_decoded_bbox = reg_decoded_bbox
self.background_label = (num_classes if background_label is None else
background_label)
# background_label should be either 0 or num_classes
assert (self.background_label == 0
or self.background_label == num_classes)
self.bbox_coder = build_bbox_coder(bbox_coder)
self.loss_cls = build_loss(loss_cls)
self.loss_bbox = build_loss(loss_bbox)
self.train_cfg = train_cfg
self.test_cfg = test_cfg
if self.train_cfg:
self.assigner = build_assigner(self.train_cfg.assigner)
# use PseudoSampler when sampling is False
if self.sampling and hasattr(self.train_cfg, 'sampler'):
sampler_cfg = self.train_cfg.sampler
else:
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
self.fp16_enabled = False
self.anchor_generator = build_anchor_generator(anchor_generator)
# usually the numbers of anchors for each level are the same
# except SSD detectors
self.num_anchors = self.anchor_generator.num_base_anchors[0]
self._init_layers()
def __init__(self,
num_classes,
in_channels,
out_channels=(1024, 512, 256),
anchor_generator=dict(type='YOLOAnchorGenerator',
base_sizes=[[(116, 90), (156, 198),
(373, 326)],
[(30, 61), (62, 45),
(59, 119)],
[(10, 13), (16, 30),
(33, 23)]],
strides=[32, 16, 8]),
bbox_coder=dict(type='YOLOBBoxCoder'),
featmap_strides=[32, 16, 8],
one_hot_smoother=0.,
conv_cfg=None,
norm_cfg=dict(type='BN', requires_grad=True),
act_cfg=dict(type='LeakyReLU', negative_slope=0.1),
loss_cls=dict(type='CrossEntropyLoss',
use_sigmoid=True,
loss_weight=1.0),
loss_conf=dict(type='CrossEntropyLoss',
use_sigmoid=True,
loss_weight=1.0),
loss_xy=dict(type='CrossEntropyLoss',
use_sigmoid=True,
loss_weight=1.0),
loss_wh=dict(type='MSELoss', loss_weight=1.0),
train_cfg=None,
test_cfg=None):
super(YOLOV3Head, self).__init__()
# Check params
assert (len(in_channels) == len(out_channels) == len(featmap_strides))
self.num_classes = num_classes
self.in_channels = in_channels
self.out_channels = out_channels
self.featmap_strides = featmap_strides
self.train_cfg = train_cfg
self.test_cfg = test_cfg
if self.train_cfg:
self.assigner = build_assigner(self.train_cfg.assigner)
if hasattr(self.train_cfg, 'sampler'):
sampler_cfg = self.train_cfg.sampler
else:
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
self.one_hot_smoother = one_hot_smoother
self.conv_cfg = conv_cfg
self.norm_cfg = norm_cfg
self.act_cfg = act_cfg
self.bbox_coder = build_bbox_coder(bbox_coder)
self.anchor_generator = build_anchor_generator(anchor_generator)
self.loss_cls = build_loss(loss_cls)
self.loss_conf = build_loss(loss_conf)
self.loss_xy = build_loss(loss_xy)
self.loss_wh = build_loss(loss_wh)
# usually the numbers of anchors for each level are the same
# except SSD detectors
self.num_anchors = self.anchor_generator.num_base_anchors[0]
assert len(
self.anchor_generator.num_base_anchors) == len(featmap_strides)
self._init_layers()
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
"""
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_metas (list[dict]): list of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and my also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
`mmdet/datasets/pipelines/formatting.py:Collect`.
gt_bboxes (list[Tensor]): each item are the truth boxes for each
image in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): specify which bounding
boxes can be ignored when computing the loss.
gt_masks (None | Tensor) : true segmentation masks for each box
used if the architecture supports a segmentation task.
proposals : override rpn proposals with custom proposals. Use when
`with_rpn` is False.
Returns:
dict[str, Tensor]: a dictionary of loss components
"""
x = self.extract_feat(img)
losses = dict()
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_metas,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_metas, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
for i in range(self.num_stages):
self.current_stage = i
rcnn_train_cfg = self.train_cfg.rcnn[i]
lw = self.train_cfg.stage_loss_weights[i]
# assign gts and sample proposals
sampling_results = []
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(rcnn_train_cfg.assigner)
bbox_sampler = build_sampler(rcnn_train_cfg.sampler,
context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
for j in range(num_imgs):
assign_result = bbox_assigner.assign(
proposal_list[j], gt_bboxes[j], gt_bboxes_ignore[j],
gt_labels[j])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[j],
gt_bboxes[j],
gt_labels[j],
feats=[lvl_feat[j][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
bbox_roi_extractor = self.bbox_roi_extractor[i]
bbox_head = self.bbox_head[i]
rois = bbox2roi([res.bboxes for res in sampling_results])
if len(rois) == 0:
# If there are no predicted and/or truth boxes, then we cannot
# compute head / mask losses
continue
bbox_feats = bbox_roi_extractor(x[:bbox_roi_extractor.num_inputs],
rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = bbox_head(bbox_feats)
bbox_targets = bbox_head.get_target(sampling_results, gt_bboxes,
gt_labels, rcnn_train_cfg)
loss_bbox = bbox_head.loss(cls_score, bbox_pred, *bbox_targets)
for name, value in loss_bbox.items():
losses['s{}.{}'.format(
i, name)] = (value * lw if 'loss' in name else value)
# mask head forward and loss
if self.with_mask:
if not self.share_roi_extractor:
mask_roi_extractor = self.mask_roi_extractor[i]
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = mask_roi_extractor(
x[:mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
# reuse positive bbox feats
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds.type(torch.bool)]
mask_head = self.mask_head[i]
mask_pred = mask_head(mask_feats)
mask_targets = mask_head.get_target(sampling_results, gt_masks,
rcnn_train_cfg)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = mask_head.loss(mask_pred, mask_targets, pos_labels)
for name, value in loss_mask.items():
losses['s{}.{}'.format(
i, name)] = (value * lw if 'loss' in name else value)
# refine bboxes
if i < self.num_stages - 1:
pos_is_gts = [res.pos_is_gt for res in sampling_results]
roi_labels = bbox_targets[0] # bbox_targets is a tuple
with torch.no_grad():
proposal_list = bbox_head.refine_bboxes(
rois, roi_labels, bbox_pred, pos_is_gts, img_metas)
return losses
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
gt_semantic_seg=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
# RPN part, the same as normal two-stage detectors
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
proposal_inputs = rpn_outs + (img_meta, proposal_cfg)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
# semantic segmentation part
# 2 outputs: segmentation prediction and embedded features
if self.with_semantic:
semantic_pred, semantic_feat = self.semantic_head(x)
loss_seg = self.semantic_head.loss(semantic_pred, gt_semantic_seg)
losses['loss_semantic_seg'] = loss_seg
else:
semantic_feat = None
for i in range(self.num_stages):
self.current_stage = i
rcnn_train_cfg = self.train_cfg.rcnn[i]
lw = self.train_cfg.stage_loss_weights[i]
# assign gts and sample proposals
sampling_results = []
bbox_assigner = build_assigner(rcnn_train_cfg.assigner)
bbox_sampler = build_sampler(rcnn_train_cfg.sampler, context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
for j in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[j],
gt_bboxes[j],
gt_bboxes_ignore[j],
gt_labels[j])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[j],
gt_bboxes[j],
gt_labels[j],
feats=[lvl_feat[j][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
loss_bbox, rois, bbox_targets, bbox_pred = \
self._bbox_forward_train(
i, x, sampling_results, gt_bboxes, gt_labels,
rcnn_train_cfg, semantic_feat)
roi_labels = bbox_targets[0]
for name, value in loss_bbox.items():
losses['s{}.{}'.format(
i, name)] = (value * lw if 'loss' in name else value)
# mask head forward and loss
if self.with_mask:
# interleaved execution: use regressed bboxes by the box branch
# to train the mask branch
if self.interleaved:
pos_is_gts = [res.pos_is_gt for res in sampling_results]
with torch.no_grad():
proposal_list = self.bbox_head[i].refine_bboxes(
rois, roi_labels, bbox_pred, pos_is_gts, img_meta)
# re-assign and sample 512 RoIs from 512 RoIs
sampling_results = []
for j in range(num_imgs):
assign_result = bbox_assigner.assign(
proposal_list[j], gt_bboxes[j],
gt_bboxes_ignore[j], gt_labels[j])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[j],
gt_bboxes[j],
gt_labels[j],
feats=[lvl_feat[j][None] for lvl_feat in x])
sampling_results.append(sampling_result)
loss_mask = self._mask_forward_train(i, x, sampling_results,
gt_masks, rcnn_train_cfg,
semantic_feat)
for name, value in loss_mask.items():
losses['s{}.{}'.format(
i, name)] = (value * lw if 'loss' in name else value)
# refine bboxes (same as Cascade R-CNN)
if i < self.num_stages - 1 and not self.interleaved:
pos_is_gts = [res.pos_is_gt for res in sampling_results]
with torch.no_grad():
proposal_list = self.bbox_head[i].refine_bboxes(
rois, roi_labels, bbox_pred, pos_is_gts, img_meta)
return losses
def __init__(self,
num_classes,
in_channels,
regress_ranges=((-1, 64), (64, 128), (128, 256), (256, 512),
(512, INF)),
center_sampling=False,
center_sample_radius=1.5,
sync_num_pos=True,
gradient_mul=0.1,
bbox_norm_type='reg_denom',
loss_cls_fl=dict(type='FocalLoss',
use_sigmoid=True,
gamma=2.0,
alpha=0.25,
loss_weight=1.0),
use_vfl=True,
loss_cls=dict(type='VarifocalLoss',
use_sigmoid=True,
alpha=0.75,
gamma=2.0,
iou_weighted=True,
loss_weight=1.0),
loss_bbox=dict(type='GIoULoss', loss_weight=1.5),
loss_bbox_refine=dict(type='GIoULoss', loss_weight=2.0),
norm_cfg=dict(type='GN', num_groups=32, requires_grad=True),
use_atss=True,
anchor_generator=dict(type='AnchorGenerator',
ratios=[1.0],
octave_base_scale=8,
scales_per_octave=1,
center_offset=0.0,
strides=[8, 16, 32, 64, 128]),
**kwargs):
# dcn base offsets, adapted from reppoints_head.py
self.num_dconv_points = 9
self.dcn_kernel = int(np.sqrt(self.num_dconv_points))
self.dcn_pad = int((self.dcn_kernel - 1) / 2)
dcn_base = np.arange(-self.dcn_pad,
self.dcn_pad + 1).astype(np.float64)
dcn_base_y = np.repeat(dcn_base, self.dcn_kernel)
dcn_base_x = np.tile(dcn_base, self.dcn_kernel)
dcn_base_offset = np.stack([dcn_base_y, dcn_base_x], axis=1).reshape(
(-1))
self.dcn_base_offset = torch.tensor(dcn_base_offset).view(1, -1, 1, 1)
super(FCOSHead, self).__init__(num_classes,
in_channels,
norm_cfg=norm_cfg,
**kwargs)
self.regress_ranges = regress_ranges
self.reg_denoms = [
regress_range[-1] for regress_range in regress_ranges
]
self.reg_denoms[-1] = self.reg_denoms[-2] * 2
self.center_sampling = center_sampling
self.center_sample_radius = center_sample_radius
self.sync_num_pos = sync_num_pos
self.bbox_norm_type = bbox_norm_type
self.gradient_mul = gradient_mul
self.use_vfl = use_vfl
if self.use_vfl:
self.loss_cls = build_loss(loss_cls)
else:
self.loss_cls = build_loss(loss_cls_fl)
self.loss_bbox = build_loss(loss_bbox)
self.loss_bbox_refine = build_loss(loss_bbox_refine)
# for getting ATSS targets
self.use_atss = use_atss
self.use_sigmoid_cls = loss_cls.get('use_sigmoid', False)
self.anchor_generator = build_anchor_generator(anchor_generator)
self.anchor_center_offset = anchor_generator['center_offset']
self.num_anchors = self.anchor_generator.num_base_anchors[0]
self.sampling = False
if self.train_cfg:
self.assigner = build_assigner(self.train_cfg.assigner)
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
def forward_train(self,
img,
img_meta,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None):
x = self.extract_feat(img)
losses = dict()
if self.with_rpn:
rpn_outs = self.rpn_head(x)
rpn_loss_inputs = rpn_outs + (gt_bboxes, img_meta,
self.train_cfg.rpn)
rpn_losses = self.rpn_head.loss(*rpn_loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore)
losses.update(rpn_losses)
proposal_inputs = rpn_outs + (img_meta, self.test_cfg.rpn)
proposal_list = self.rpn_head.get_bboxes(*proposal_inputs)
else:
proposal_list = proposals
for i in range(self.num_stages):
self.current_stage = i
rcnn_train_cfg = self.train_cfg.rcnn[i]
lw = self.train_cfg.stage_loss_weights[i]
# assign gts and sample proposals
sampling_results = []
if self.with_bbox or self.with_mask:
bbox_assigner = build_assigner(rcnn_train_cfg.assigner)
bbox_sampler = build_sampler(rcnn_train_cfg.sampler,
context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
for j in range(num_imgs):
assign_result = bbox_assigner.assign(
proposal_list[j], gt_bboxes[j], gt_bboxes_ignore[j],
gt_labels[j])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[j],
gt_bboxes[j],
gt_labels[j],
feats=[lvl_feat[j][None] for lvl_feat in x])
sampling_results.append(sampling_result)
# bbox head forward and loss
bbox_roi_extractor = self.bbox_roi_extractor[i]
bbox_head = self.bbox_head[i]
rois = bbox2roi([res.bboxes for res in sampling_results])
bbox_feats = bbox_roi_extractor(x[:bbox_roi_extractor.num_inputs],
rois)
if self.with_shared_head:
bbox_feats = self.shared_head(bbox_feats)
cls_score, bbox_pred = bbox_head(bbox_feats)
bbox_targets = bbox_head.get_target(sampling_results, gt_bboxes,
gt_labels, rcnn_train_cfg)
loss_bbox = bbox_head.loss(cls_score, bbox_pred, *bbox_targets)
for name, value in loss_bbox.items():
losses['s{}.{}'.format(
i, name)] = (value * lw if 'loss' in name else value)
# mask head forward and loss
if self.with_mask:
if not self.share_roi_extractor:
mask_roi_extractor = self.mask_roi_extractor[i]
pos_rois = bbox2roi(
[res.pos_bboxes for res in sampling_results])
mask_feats = mask_roi_extractor(
x[:mask_roi_extractor.num_inputs], pos_rois)
if self.with_shared_head:
mask_feats = self.shared_head(mask_feats)
else:
# reuse positive bbox feats
pos_inds = []
device = bbox_feats.device
for res in sampling_results:
pos_inds.append(
torch.ones(res.pos_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds.append(
torch.zeros(res.neg_bboxes.shape[0],
device=device,
dtype=torch.uint8))
pos_inds = torch.cat(pos_inds)
mask_feats = bbox_feats[pos_inds]
mask_head = self.mask_head[i]
mask_pred = mask_head(mask_feats)
mask_targets = mask_head.get_target(sampling_results, gt_masks,
rcnn_train_cfg)
pos_labels = torch.cat(
[res.pos_gt_labels for res in sampling_results])
loss_mask = mask_head.loss(mask_pred, mask_targets, pos_labels)
for name, value in loss_mask.items():
losses['s{}.{}'.format(
i, name)] = (value * lw if 'loss' in name else value)
# refine bboxes
if i < self.num_stages - 1:
pos_is_gts = [res.pos_is_gt for res in sampling_results]
roi_labels = bbox_targets[0] # bbox_targets is a tuple
with torch.no_grad():
proposal_list = bbox_head.refine_bboxes(
rois, roi_labels, bbox_pred, pos_is_gts, img_meta)
return losses
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None):
if self.use_consistent_supervision:
x, y = self.extract_feat(img)
gt_bboxes_auxiliary = [gt.clone() for gt in gt_bboxes]
gt_labels_auxiliary = [label.clone() for label in gt_labels]
else:
x = self.extract_feat(img)
outs = self.bbox_head(x)
loss_inputs = outs + (gt_bboxes, gt_labels, img_metas, self.train_cfg)
losses = self.bbox_head.loss(*loss_inputs,
gt_bboxes_ignore=gt_bboxes_ignore)
if self.use_consistent_supervision:
proposal_cfg = self.train_cfg.auxiliary.proposal
proposal_inputs = outs + (img_metas, proposal_cfg)
proposal_list = self.bbox_head.get_bboxes_auxiliary(
*proposal_inputs)
bbox_assigner = build_assigner(self.train_cfg.auxiliary.assigner)
bbox_sampler = build_sampler(self.train_cfg.auxiliary.sampler,
context=self)
num_imgs = img.size(0)
if gt_bboxes_ignore is None:
gt_bboxes_ignore = [None for _ in range(num_imgs)]
sampling_results = []
for i in range(num_imgs):
assign_result = bbox_assigner.assign(proposal_list[i],
gt_bboxes_auxiliary[i],
gt_bboxes_ignore[i],
gt_labels_auxiliary[i])
sampling_result = bbox_sampler.sample(
assign_result,
proposal_list[i],
gt_bboxes_auxiliary[i],
gt_labels_auxiliary[i],
feats=[lvl_feat[i][None] for lvl_feat in x])
sampling_results.append(sampling_result)
rois = bbox2roi([res.bboxes for res in sampling_results])
bbox_feats_raw = self.auxiliary_bbox_roi_extractor(
y[:self.auxiliary_bbox_roi_extractor.num_inputs], rois)
cls_score_auxiliary, bbox_pred_auxiliary = self.auxiliary_bbox_head(
bbox_feats_raw)
bbox_targets = self.auxiliary_bbox_head.get_target(
sampling_results, gt_bboxes, gt_labels,
self.train_cfg.auxiliary.rcnn)
loss_bbox_auxiliary = self.auxiliary_bbox_head.loss(
cls_score_auxiliary,
bbox_pred_auxiliary,
*bbox_targets,
alpha=0.25,
num_level=3)
losses.update(loss_bbox_auxiliary)
return losses
def __init__(self,
num_classes,
in_channels,
anchor_generator=dict(type='YOLOAnchorGenerator',
base_sizes=[[(32, 32), (48, 48),
(24, 32), (32, 48)],
[(64, 64), (72, 72),
(72, 96), (96, 96)],
[(72, 96), (96, 96),
(128, 128), (96, 128)]],
strides=[16, 32, 64]),
bbox_coder=dict(type='YOLOBBoxCoder'),
featmap_strides=[16, 32, 64],
one_hot_smoother=0.,
loss_cls=dict(type='CrossEntropyLoss',
use_sigmoid=True,
loss_weight=1.0),
loss_conf=dict(type='CrossEntropyLoss',
use_sigmoid=True,
loss_weight=1.0),
loss_xy=dict(type='CrossEntropyLoss',
use_sigmoid=True,
loss_weight=1.0),
loss_wh=dict(type='MSELoss', loss_weight=1.0),
loss_iou=dict(type='CIoULoss', loss_weight=2.0),
train_cfg=None,
test_cfg=None):
super(CZ_CoarseHead, self).__init__()
# Check params
assert (len(in_channels) == len(featmap_strides))
self.num_classes = num_classes
self.in_channels = in_channels
self.featmap_strides = featmap_strides
self.train_cfg = train_cfg
self.test_cfg = test_cfg
self.sampling = False
if self.train_cfg:
self.assigner = build_assigner(self.train_cfg.assigner)
if hasattr(self.train_cfg, 'sampler'):
sampler_cfg = self.train_cfg.sampler
else:
sampler_cfg = dict(type='PseudoSampler')
self.sampler = build_sampler(sampler_cfg, context=self)
self.one_hot_smoother = one_hot_smoother
self.bbox_coder = build_bbox_coder(bbox_coder)
self.anchor_generator = build_anchor_generator(anchor_generator)
self.loss_cls = build_loss(loss_cls)
self.loss_conf = build_loss(loss_conf)
self.loss_xy = build_loss(loss_xy)
self.loss_wh = build_loss(loss_wh)
self.loss_iou = build_loss(loss_iou)
# usually the numbers of anchors for each level are the same
# except SSD detectors
self.num_anchors = self.anchor_generator.num_base_anchors[0]
assert len(
self.anchor_generator.num_base_anchors) == len(featmap_strides)
self._init_layers()
