本文整理汇总了Python中mmdet.ops.nms.nms_wrapper方法的典型用法代码示例。如果您正苦于以下问题：Python nms.nms_wrapper方法的具体用法？Python nms.nms_wrapper怎么用？Python nms.nms_wrapper使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类mmdet.ops.nms的用法示例。
在下文中一共展示了nms.nms_wrapper方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: multiclass_nms
# 需要导入模块: from mmdet.ops import nms [as 别名]
# 或者: from mmdet.ops.nms import nms_wrapper [as 别名]
def multiclass_nms(multi_bboxes,
multi_scores,
score_thr,
nms_cfg,
max_num=-1,
score_factors=None):
"""NMS for multi-class bboxes.
Args:
multi_bboxes (Tensor): shape (n, #class*4) or (n, 4)
multi_scores (Tensor): shape (n, #class)
score_thr (float): bbox threshold, bboxes with scores lower than it
will not be considered.
nms_thr (float): NMS IoU threshold
max_num (int): if there are more than max_num bboxes after NMS,
only top max_num will be kept.
score_factors (Tensor): The factors multiplied to scores before
applying NMS
Returns:
tuple: (bboxes, labels), tensors of shape (k, 5) and (k, 1). Labels
are 0-based.
"""
num_classes = multi_scores.shape[1]
bboxes, labels = [], []
nms_cfg_ = nms_cfg.copy()
nms_type = nms_cfg_.pop('type', 'nms')
nms_op = getattr(nms_wrapper, nms_type)
for i in range(1, num_classes):
cls_inds = multi_scores[:, i] > score_thr
if not cls_inds.any():
continue
# get bboxes and scores of this class
if multi_bboxes.shape[1] == 4:
_bboxes = multi_bboxes[cls_inds, :]
else:
_bboxes = multi_bboxes[cls_inds, i * 4:(i + 1) * 4]
_scores = multi_scores[cls_inds, i]
if score_factors is not None:
_scores *= score_factors[cls_inds]
cls_dets = torch.cat([_bboxes, _scores[:, None]], dim=1)
cls_dets, _ = nms_op(cls_dets, **nms_cfg_)
cls_labels = multi_bboxes.new_full(
(cls_dets.shape[0], ), i - 1, dtype=torch.long)
bboxes.append(cls_dets)
labels.append(cls_labels)
if bboxes:
bboxes = torch.cat(bboxes)
labels = torch.cat(labels)
if bboxes.shape[0] > max_num:
_, inds = bboxes[:, -1].sort(descending=True)
inds = inds[:max_num]
bboxes = bboxes[inds]
labels = labels[inds]
else:
bboxes = multi_bboxes.new_zeros((0, 5))
labels = multi_bboxes.new_zeros((0, ), dtype=torch.long)
return bboxes, labels 示例2: multiclass_nms
# 需要导入模块: from mmdet.ops import nms [as 别名]
# 或者: from mmdet.ops.nms import nms_wrapper [as 别名]
def multiclass_nms(multi_bboxes,
multi_scores,
score_thr,
nms_cfg,
max_num=-1,
score_factors=None):
"""NMS for multi-class bboxes.
Args:
multi_bboxes (Tensor): shape (n, #class*4) or (n, 4)
multi_scores (Tensor): shape (n, #class)
score_thr (float): bbox threshold, bboxes with scores lower than it
will not be considered.
nms_thr (float): NMS IoU threshold
max_num (int): if there are more than max_num bboxes after NMS,
only top max_num will be kept.
score_factors (Tensor): The factors multiplied to scores before
applying NMS
Returns:
tuple: (bboxes, labels), tensors of shape (k, 5) and (k, 1). Labels
are 0-based.
"""
num_classes = multi_scores.shape[1]
bboxes, labels = [], []
nms_cfg_ = nms_cfg.copy()
nms_type = nms_cfg_.pop('type', 'nms')
nms_op = getattr(nms_wrapper, nms_type)
for i in range(1, num_classes):
cls_inds = multi_scores[:, i] > score_thr
if not cls_inds.any():
continue
# get bboxes and scores of this class
if multi_bboxes.shape[1] == 4:
_bboxes = multi_bboxes[cls_inds, :]
else:
_bboxes = multi_bboxes[cls_inds, i * 4:(i + 1) * 4]
_scores = multi_scores[cls_inds, i]
if score_factors is not None:
_scores *= score_factors[cls_inds]
cls_dets = torch.cat([_bboxes, _scores[:, None]], dim=1)
cls_dets, _ = nms_op(cls_dets, **nms_cfg_)
cls_labels = multi_bboxes.new_full((cls_dets.shape[0], ),
i - 1,
dtype=torch.long)
bboxes.append(cls_dets)
labels.append(cls_labels)
if bboxes:
bboxes = torch.cat(bboxes)
labels = torch.cat(labels)
if bboxes.shape[0] > max_num:
_, inds = bboxes[:, -1].sort(descending=True)
inds = inds[:max_num]
bboxes = bboxes[inds]
labels = labels[inds]
else:
bboxes = multi_bboxes.new_zeros((0, 5))
labels = multi_bboxes.new_zeros((0, ), dtype=torch.long)
return bboxes, labels 示例3: multiclass_nms
# 需要导入模块: from mmdet.ops import nms [as 别名]
# 或者: from mmdet.ops.nms import nms_wrapper [as 别名]
def multiclass_nms(multi_bboxes,
multi_scores,
score_thr,
nms_cfg,
max_num=-1,
score_factors=None):
"""NMS for multi-class bboxes.
Args:
multi_bboxes (Tensor): shape (n, #class*4) or (n, 4)
multi_scores (Tensor): shape (n, #class), where the 0th column
contains scores of the background class, but this will be ignored.
score_thr (float): bbox threshold, bboxes with scores lower than it
will not be considered.
nms_thr (float): NMS IoU threshold
max_num (int): if there are more than max_num bboxes after NMS,
only top max_num will be kept.
score_factors (Tensor): The factors multiplied to scores before
applying NMS
Returns:
tuple: (bboxes, labels), tensors of shape (k, 5) and (k, 1). Labels
are 0-based.
"""
num_classes = multi_scores.shape[1]
bboxes, labels = [], []
nms_cfg_ = nms_cfg.copy()
nms_type = nms_cfg_.pop('type', 'nms')
nms_op = getattr(nms_wrapper, nms_type)
for i in range(1, num_classes):
cls_inds = multi_scores[:, i] > score_thr
if not cls_inds.any():
continue
# get bboxes and scores of this class
if multi_bboxes.shape[1] == 4:
_bboxes = multi_bboxes[cls_inds, :]
else:
_bboxes = multi_bboxes[cls_inds, i * 4:(i + 1) * 4]
_scores = multi_scores[cls_inds, i]
if score_factors is not None:
_scores *= score_factors[cls_inds]
cls_dets = torch.cat([_bboxes, _scores[:, None]], dim=1)
cls_dets, _ = nms_op(cls_dets, **nms_cfg_)
cls_labels = multi_bboxes.new_full((cls_dets.shape[0], ),
i - 1,
dtype=torch.long)
bboxes.append(cls_dets)
labels.append(cls_labels)
if bboxes:
bboxes = torch.cat(bboxes)
labels = torch.cat(labels)
if bboxes.shape[0] > max_num:
_, inds = bboxes[:, -1].sort(descending=True)
inds = inds[:max_num]
bboxes = bboxes[inds]
labels = labels[inds]
else:
bboxes = multi_bboxes.new_zeros((0, 5))
labels = multi_bboxes.new_zeros((0, ), dtype=torch.long)
return bboxes, labels 示例4: multiclass_nms
# 需要导入模块: from mmdet.ops import nms [as 别名]
# 或者: from mmdet.ops.nms import nms_wrapper [as 别名]
def multiclass_nms(multi_bboxes, multi_scores, score_thr, nms_cfg, max_num=-1):
"""NMS for multi-class bboxes.
Args:
multi_bboxes (Tensor): shape (n, #class*4) or (n, 4)
multi_scores (Tensor): shape (n, #class)
score_thr (float): bbox threshold, bboxes with scores lower than it
will not be considered.
nms_thr (float): NMS IoU threshold
max_num (int): if there are more than max_num bboxes after NMS,
only top max_num will be kept.
Returns:
tuple: (bboxes, labels), tensors of shape (k, 5) and (k, 1). Labels
are 0-based.
"""
num_classes = multi_scores.shape[1]
bboxes, labels = [], []
nms_cfg_ = nms_cfg.copy()
nms_type = nms_cfg_.pop('type', 'nms')
nms_op = getattr(nms_wrapper, nms_type)
for i in range(1, num_classes):
cls_inds = multi_scores[:, i] > score_thr
if not cls_inds.any():
continue
# get bboxes and scores of this class
if multi_bboxes.shape[1] == 4:
_bboxes = multi_bboxes[cls_inds, :]
else:
_bboxes = multi_bboxes[cls_inds, i * 4:(i + 1) * 4]
_scores = multi_scores[cls_inds, i]
cls_dets = torch.cat([_bboxes, _scores[:, None]], dim=1)
cls_dets, _ = nms_op(cls_dets, **nms_cfg_)
cls_labels = multi_bboxes.new_full(
(cls_dets.shape[0], ), i - 1, dtype=torch.long)
bboxes.append(cls_dets)
labels.append(cls_labels)
if bboxes:
bboxes = torch.cat(bboxes)
labels = torch.cat(labels)
if bboxes.shape[0] > max_num:
_, inds = bboxes[:, -1].sort(descending=True)
inds = inds[:max_num]
bboxes = bboxes[inds]
labels = labels[inds]
else:
bboxes = multi_bboxes.new_zeros((0, 5))
labels = multi_bboxes.new_zeros((0, ), dtype=torch.long)
return bboxes, labels