[Enhance] Use Points structure in augmentation and models (#204)

* add h3d backbone

* add h3d backbone

* add h3dnet

* modify scannet config

* fix bugs for proposal refine

* fix bugs for test backbone

* add primitive head test

* modify h3dhead

* modify h3d head

* update loss weight config

* fix bugs for h3d head loss

* modify h3d head get targets function

* update h3dnet base config

* modify weighted loss

* Revert "Merge branch 'h3d_u2' into 'master'"

This reverts merge request !5

* modify pipeline

* modify kitti pipeline

* fix bugs for points rotation

* modify multi sweeps

* modify multi sweep points

* fix bugs for points slicing

* modify BackgroundPointsFilter

* modify pipeline

* modify unittest

* modify unittest

* modify docstring

* modify config files

* update configs

* modify docstring

configs/free_anchor/hv_pointpillars_regnet-1.6gf_fpn_sbn-all_free-anchor_strong-aug_4x8_3x_nus-3d.py

@@ -37,6 +37,7 @@ file_client_args = dict(
 train_pipeline = [
     dict(
         type='LoadPointsFromFile',
+        coord_type='LIDAR',
         load_dim=5,
         use_dim=5,
         file_client_args=file_client_args),

configs/free_anchor/hv_pointpillars_regnet-3.2gf_fpn_sbn-all_free-anchor_strong-aug_4x8_3x_nus-3d.py

@@ -37,6 +37,7 @@ file_client_args = dict(
 train_pipeline = [
     dict(
         type='LoadPointsFromFile',
+        coord_type='LIDAR',
         load_dim=5,
         use_dim=5,
         file_client_args=file_client_args),

configs/mvxnet/dv_mvx-fpn_second_secfpn_adamw_2x8_80e_kitti-3d-3class.py

@@ -135,7 +135,7 @@ img_norm_cfg = dict(
     mean=[103.530, 116.280, 123.675], std=[1.0, 1.0, 1.0], to_rgb=False)
 input_modality = dict(use_lidar=True, use_camera=True)
 train_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=4, use_dim=4),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=4, use_dim=4),
     dict(type='LoadImageFromFile'),
     dict(type='LoadAnnotations3D', with_bbox_3d=True, with_label_3d=True),
     dict(
@@ -160,7 +160,7 @@ train_pipeline = [
         keys=['points', 'img', 'gt_bboxes_3d', 'gt_labels_3d']),
 ]
 test_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=4, use_dim=4),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=4, use_dim=4),
     dict(type='LoadImageFromFile'),
     dict(
         type='MultiScaleFlipAug3D',

configs/parta2/hv_PartA2_secfpn_2x8_cyclic_80e_kitti-3d-3class.py

@@ -210,7 +210,7 @@ db_sampler = dict(
     classes=class_names,
     sample_groups=dict(Car=12, Pedestrian=6, Cyclist=6))
 train_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=4, use_dim=4),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=4, use_dim=4),
     dict(type='LoadAnnotations3D', with_bbox_3d=True, with_label_3d=True),
     dict(type='ObjectSample', db_sampler=db_sampler),
     dict(
@@ -232,7 +232,7 @@ train_pipeline = [
     dict(type='Collect3D', keys=['points', 'gt_bboxes_3d', 'gt_labels_3d'])
 ]
 test_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=4, use_dim=4),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=4, use_dim=4),
     dict(
         type='MultiScaleFlipAug3D',
         img_scale=(1333, 800),

configs/parta2/hv_PartA2_secfpn_2x8_cyclic_80e_kitti-3d-car.py

@@ -82,7 +82,7 @@ db_sampler = dict(
     classes=class_names,
     sample_groups=dict(Car=15))
 train_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=4, use_dim=4),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=4, use_dim=4),
     dict(type='LoadAnnotations3D', with_bbox_3d=True, with_label_3d=True),
     dict(type='ObjectSample', db_sampler=db_sampler),
     dict(
@@ -104,7 +104,7 @@ train_pipeline = [
     dict(type='Collect3D', keys=['points', 'gt_bboxes_3d', 'gt_labels_3d'])
 ]
 test_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=4, use_dim=4),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=4, use_dim=4),
     dict(
         type='MultiScaleFlipAug3D',
         img_scale=(1333, 800),

configs/pointpillars/hv_pointpillars_secfpn_6x8_160e_kitti-3d-3class.py

@@ -21,7 +21,7 @@ db_sampler = dict(
 
 # PointPillars uses different augmentation hyper parameters
 train_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=4, use_dim=4),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=4, use_dim=4),
     dict(type='LoadAnnotations3D', with_bbox_3d=True, with_label_3d=True),
     dict(type='ObjectSample', db_sampler=db_sampler),
     dict(
@@ -42,7 +42,7 @@ train_pipeline = [
     dict(type='Collect3D', keys=['points', 'gt_bboxes_3d', 'gt_labels_3d'])
 ]
 test_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=4, use_dim=4),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=4, use_dim=4),
     dict(
         type='MultiScaleFlipAug3D',
         img_scale=(1333, 800),

configs/pointpillars/hv_pointpillars_secfpn_6x8_160e_kitti-3d-car.py

@@ -40,7 +40,7 @@ db_sampler = dict(
     classes=class_names)
 
 train_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=4, use_dim=4),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=4, use_dim=4),
     dict(type='LoadAnnotations3D', with_bbox_3d=True, with_label_3d=True),
     dict(type='ObjectSample', db_sampler=db_sampler),
     dict(
@@ -61,7 +61,7 @@ train_pipeline = [
     dict(type='Collect3D', keys=['points', 'gt_bboxes_3d', 'gt_labels_3d'])
 ]
 test_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=4, use_dim=4),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=4, use_dim=4),
     dict(
         type='MultiScaleFlipAug3D',
         img_scale=(1333, 800),

configs/second/hv_second_secfpn_sbn_2x16_2x_waymoD5-3d-3class.py

@@ -24,7 +24,7 @@ db_sampler = dict(
         type='LoadPointsFromFile', load_dim=5, use_dim=[0, 1, 2, 3, 4]))
 
 train_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=6, use_dim=5),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=6, use_dim=5),
     dict(type='LoadAnnotations3D', with_bbox_3d=True, with_label_3d=True),
     dict(type='ObjectSample', db_sampler=db_sampler),
     dict(
@@ -44,7 +44,7 @@ train_pipeline = [
 ]
 
 test_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=6, use_dim=5),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=6, use_dim=5),
     dict(
         type='MultiScaleFlipAug3D',
         img_scale=(1333, 800),

configs/ssn/hv_ssn_secfpn_sbn-all_2x16_2x_lyft-3d.py

@@ -13,7 +13,7 @@ class_names = [
 ]
 
 train_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=5, use_dim=5),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=5, use_dim=5),
     dict(type='LoadPointsFromMultiSweeps', sweeps_num=10),
     dict(type='LoadAnnotations3D', with_bbox_3d=True, with_label_3d=True),
     dict(
@@ -33,7 +33,7 @@ train_pipeline = [
     dict(type='Collect3D', keys=['points', 'gt_bboxes_3d', 'gt_labels_3d'])
 ]
 test_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=5, use_dim=5),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=5, use_dim=5),
     dict(type='LoadPointsFromMultiSweeps', sweeps_num=10),
     dict(
         type='MultiScaleFlipAug3D',

configs/ssn/hv_ssn_secfpn_sbn-all_2x16_2x_nus-3d.py

@@ -13,7 +13,7 @@ class_names = [
 ]
 
 train_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=5, use_dim=5),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=5, use_dim=5),
     dict(type='LoadPointsFromMultiSweeps', sweeps_num=10),
     dict(type='LoadAnnotations3D', with_bbox_3d=True, with_label_3d=True),
     dict(
@@ -33,7 +33,7 @@ train_pipeline = [
     dict(type='Collect3D', keys=['points', 'gt_bboxes_3d', 'gt_labels_3d'])
 ]
 test_pipeline = [
-    dict(type='LoadPointsFromFile', load_dim=5, use_dim=5),
+    dict(type='LoadPointsFromFile', coord_type='LIDAR', load_dim=5, use_dim=5),
     dict(type='LoadPointsFromMultiSweeps', sweeps_num=10),
     dict(
         type='MultiScaleFlipAug3D',

mmdet3d/core/bbox/structures/cam_box3d.py

 import numpy as np
 import torch
 
+from mmdet3d.core.points import BasePoints
 from .base_box3d import BaseInstance3DBoxes
 from .utils import limit_period, rotation_3d_in_axis
 
@@ -96,7 +97,8 @@ class CameraInstance3DBoxes(BaseInstance3DBoxes):
 
     @property
     def corners(self):
-        """torch.Tensor: Coordinates of corners of all the boxes in shape (N, 8, 3).
+        """torch.Tensor: Coordinates of corners of all the boxes in
+                         shape (N, 8, 3).
 
         Convert the boxes to  in clockwise order, in the form of
         (x0y0z0, x0y0z1, x0y1z1, x0y1z0, x1y0z0, x1y0z1, x1y1z1, x1y1z0)
@@ -168,8 +170,8 @@ class CameraInstance3DBoxes(BaseInstance3DBoxes):
 
         Args:
             angle (float, torch.Tensor): Rotation angle.
-            points (torch.Tensor, numpy.ndarray, optional): Points to rotate.
-                Defaults to None.
+            points (torch.Tensor, numpy.ndarray, :obj:`BasePoints`, optional):
+                Points to rotate. Defaults to None.
 
         Returns:
             tuple or None: When ``points`` is None, the function returns \
@@ -192,6 +194,9 @@ class CameraInstance3DBoxes(BaseInstance3DBoxes):
             elif isinstance(points, np.ndarray):
                 rot_mat_T = rot_mat_T.numpy()
                 points[:, :3] = np.dot(points[:, :3], rot_mat_T)
+            elif isinstance(points, BasePoints):
+                # clockwise
+                points.rotate(-angle)
             else:
                 raise ValueError
             return points, rot_mat_T
@@ -203,8 +208,8 @@ class CameraInstance3DBoxes(BaseInstance3DBoxes):
 
         Args:
             bev_direction (str): Flip direction (horizontal or vertical).
-            points (torch.Tensor, numpy.ndarray, None): Points to flip.
-                Defaults to None.
+            points (torch.Tensor, numpy.ndarray, :obj:`BasePoints`, None):
+                Points to flip. Defaults to None.
 
         Returns:
             torch.Tensor, numpy.ndarray or None: Flipped points.
@@ -220,11 +225,14 @@ class CameraInstance3DBoxes(BaseInstance3DBoxes):
                 self.tensor[:, 6] = -self.tensor[:, 6]
 
         if points is not None:
-            assert isinstance(points, (torch.Tensor, np.ndarray))
+            assert isinstance(points, (torch.Tensor, np.ndarray, BasePoints))
+            if isinstance(points, (torch.Tensor, np.ndarray)):
                 if bev_direction == 'horizontal':
                     points[:, 0] = -points[:, 0]
                 elif bev_direction == 'vertical':
                     points[:, 2] = -points[:, 2]
+            elif isinstance(points, BasePoints):
+                points.flip(bev_direction)
             return points
 
     def in_range_bev(self, box_range):

mmdet3d/core/bbox/structures/depth_box3d.py

 import numpy as np
 import torch
 
+from mmdet3d.core.points import BasePoints
 from mmdet3d.ops import points_in_boxes_batch
 from .base_box3d import BaseInstance3DBoxes
 from .utils import limit_period, rotation_3d_in_axis
@@ -114,8 +115,8 @@ class DepthInstance3DBoxes(BaseInstance3DBoxes):
 
         Args:
             angle (float, torch.Tensor): Rotation angle.
-            points (torch.Tensor, numpy.ndarray, optional): Points to rotate.
-                Defaults to None.
+            points (torch.Tensor, numpy.ndarray, :obj:`BasePoints`, optional):
+                Points to rotate. Defaults to None.
 
         Returns:
             tuple or None: When ``points`` is None, the function returns \
@@ -148,6 +149,9 @@ class DepthInstance3DBoxes(BaseInstance3DBoxes):
             elif isinstance(points, np.ndarray):
                 rot_mat_T = rot_mat_T.numpy()
                 points[:, :3] = np.dot(points[:, :3], rot_mat_T)
+            elif isinstance(points, BasePoints):
+                # anti-clockwise
+                points.rotate(angle)
             else:
                 raise ValueError
             return points, rot_mat_T
@@ -159,8 +163,8 @@ class DepthInstance3DBoxes(BaseInstance3DBoxes):
 
         Args:
             bev_direction (str): Flip direction (horizontal or vertical).
-            points (torch.Tensor, numpy.ndarray, None): Points to flip.
-                Defaults to None.
+            points (torch.Tensor, numpy.ndarray, :obj:`BasePoints`, None):
+                Points to flip. Defaults to None.
 
         Returns:
             torch.Tensor, numpy.ndarray or None: Flipped points.
@@ -176,11 +180,14 @@ class DepthInstance3DBoxes(BaseInstance3DBoxes):
                 self.tensor[:, 6] = -self.tensor[:, 6]
 
         if points is not None:
-            assert isinstance(points, (torch.Tensor, np.ndarray))
+            assert isinstance(points, (torch.Tensor, np.ndarray, BasePoints))
+            if isinstance(points, (torch.Tensor, np.ndarray)):
                 if bev_direction == 'horizontal':
                     points[:, 0] = -points[:, 0]
                 elif bev_direction == 'vertical':
                     points[:, 1] = -points[:, 1]
+            elif isinstance(points, BasePoints):
+                points.flip(bev_direction)
             return points
 
     def in_range_bev(self, box_range):

mmdet3d/core/bbox/structures/lidar_box3d.py

 import numpy as np
 import torch
 
+from mmdet3d.core.points import BasePoints
 from mmdet3d.ops.roiaware_pool3d import points_in_boxes_gpu
 from .base_box3d import BaseInstance3DBoxes
 from .utils import limit_period, rotation_3d_in_axis
@@ -114,8 +115,8 @@ class LiDARInstance3DBoxes(BaseInstance3DBoxes):
 
         Args:
             angle (float | torch.Tensor): Rotation angle.
-            points (torch.Tensor, numpy.ndarray, optional): Points to rotate.
-                Defaults to None.
+            points (torch.Tensor, numpy.ndarray, :obj:`BasePoints`, optional):
+                Points to rotate. Defaults to None.
 
         Returns:
             tuple or None: When ``points`` is None, the function returns \
@@ -142,6 +143,9 @@ class LiDARInstance3DBoxes(BaseInstance3DBoxes):
             elif isinstance(points, np.ndarray):
                 rot_mat_T = rot_mat_T.numpy()
                 points[:, :3] = np.dot(points[:, :3], rot_mat_T)
+            elif isinstance(points, BasePoints):
+                # clockwise
+                points.rotate(-angle)
             else:
                 raise ValueError
             return points, rot_mat_T
@@ -153,8 +157,8 @@ class LiDARInstance3DBoxes(BaseInstance3DBoxes):
 
         Args:
             bev_direction (str): Flip direction (horizontal or vertical).
-            points (torch.Tensor, numpy.ndarray, None): Points to flip.
-                Defaults to None.
+            points (torch.Tensor, numpy.ndarray, :obj:`BasePoints`, None):
+                Points to flip. Defaults to None.
 
         Returns:
             torch.Tensor, numpy.ndarray or None: Flipped points.
@@ -170,11 +174,14 @@ class LiDARInstance3DBoxes(BaseInstance3DBoxes):
                 self.tensor[:, 6] = -self.tensor[:, 6]
 
         if points is not None:
-            assert isinstance(points, (torch.Tensor, np.ndarray))
+            assert isinstance(points, (torch.Tensor, np.ndarray, BasePoints))
+            if isinstance(points, (torch.Tensor, np.ndarray)):
                 if bev_direction == 'horizontal':
                     points[:, 1] = -points[:, 1]
                 elif bev_direction == 'vertical':
                     points[:, 0] = -points[:, 0]
+            elif isinstance(points, BasePoints):
+                points.flip(bev_direction)
             return points
 
     def in_range_bev(self, box_range):

mmdet3d/core/points/__init__.py

@@ -4,3 +4,26 @@ from .depth_points import DepthPoints
 from .lidar_points import LiDARPoints
 
 __all__ = ['BasePoints', 'CameraPoints', 'DepthPoints', 'LiDARPoints']
+
+
+def get_points_type(points_type):
+    """Get the class of points according to coordinate type.
+
+    Args:
+        points_type (str): The type of points coordinate.
+            The valid value are "CAMERA", "LIDAR", or "DEPTH".
+
+    Returns:
+        class: Points type.
+    """
+    if points_type == 'CAMERA':
+        points_cls = CameraPoints
+    elif points_type == 'LIDAR':
+        points_cls = LiDARPoints
+    elif points_type == 'DEPTH':
+        points_cls = DepthPoints
+    else:
+        raise ValueError('Only "points_type" of "CAMERA", "LIDAR", or "DEPTH"'
+                         f' are supported, got {points_type}')
+
+    return points_cls

mmdet3d/core/points/base_points.py

+import numpy as np
 import torch
 from abc import abstractmethod
 
@@ -18,6 +19,7 @@ class BasePoints(object):
             Each row is (x, y, z, ...).
         attribute_dims (bool): Dictinory to indicate the meaning of extra
             dimension. Default to None.
+        rotation_axis (int): Default rotation axis for points rotation.
     """
 
     def __init__(self, tensor, points_dim=3, attribute_dims=None):
@@ -37,6 +39,7 @@ class BasePoints(object):
         self.tensor = tensor
         self.points_dim = points_dim
         self.attribute_dims = attribute_dims
+        self.rotation_axis = 0
 
     @property
     def coord(self):
@@ -61,24 +64,32 @@ class BasePoints(object):
         else:
             return None
 
+    @property
+    def shape(self):
+        """torch.Shape: Shape of points."""
+        return self.tensor.shape
+
     def shuffle(self):
         """Shuffle the points."""
         self.tensor = self.tensor[torch.randperm(
             self.__len__(), device=self.tensor.device)]
 
-    def rotate(self, rotation, axis=2):
+    def rotate(self, rotation, axis=None):
         """Rotate points with the given rotation matrix or angle.
 
         Args:
             rotation (float, np.ndarray, torch.Tensor): Rotation matrix
                 or angle.
-            axis (int): Axis to rotate at. Defaults to 2.
+            axis (int): Axis to rotate at. Defaults to None.
         """
         if not isinstance(rotation, torch.Tensor):
             rotation = self.tensor.new_tensor(rotation)
         assert rotation.shape == torch.Size([3, 3]) or \
             rotation.numel() == 1
 
+        if axis is None:
+            axis = self.rotation_axis
+
         if rotation.numel() == 1:
             rot_sin = torch.sin(rotation)
             rot_cos = torch.cos(rotation)
@@ -204,12 +215,14 @@ class BasePoints(object):
             3. `new_points = points[vector]`:
                 where vector is a torch.BoolTensor with `length = len(points)`.
                 Nonzero elements in the vector will be selected.
+            4. `new_points = points[3:11, vector]`:
+                return a slice of points and attribute dims.
             Note that the returned Points might share storage with this Points,
             subject to Pytorch's indexing semantics.
 
         Returns:
-            :obj:`BaseInstancesPints`: A new object of  \
-                :class:`BaseInstancesPints` after indexing.
+            :obj:`BasePoints`: A new object of  \
+                :class:`BasePoints` after indexing.
         """
         original_type = type(self)
         if isinstance(item, int):
@@ -217,11 +230,43 @@ class BasePoints(object):
                 self.tensor[item].view(1, -1),
                 points_dim=self.points_dim,
                 attribute_dims=self.attribute_dims)
+        elif isinstance(item, tuple) and len(item) == 2:
+            if isinstance(item[1], slice):
+                start = 0 if item[1].start is None else item[1].start
+                stop = self.tensor.shape[1] + \
+                    1 if item[1].stop is None else item[1].stop
+                step = 1 if item[1].step is None else item[1].step
+                item[1] = list(range(start, stop, step))
+            p = self.tensor[item[0], item[1]]
+
+            keep_dims = list(
+                set(item[1]).intersection(set(range(3, self.tensor.shape[1]))))
+            if self.attribute_dims is not None:
+                attribute_dims = self.attribute_dims.copy()
+                for key in self.attribute_dims.keys():
+                    cur_attribute_dim = attribute_dims[key]
+                    if isinstance(cur_attribute_dim, int):
+                        cur_attribute_dims = [cur_attribute_dim]
+                    intersect_attr = list(
+                        set(cur_attribute_dims).intersection(set(keep_dims)))
+                    if len(intersect_attr) == 1:
+                        attribute_dims[key] = intersect_attr[0]
+                    elif len(intersect_attr) > 1:
+                        attribute_dims[key] = intersect_attr
+                    else:
+                        attribute_dims.pop(key)
+            else:
+                attribute_dims = None
+        elif isinstance(item, (slice, np.ndarray, torch.Tensor)):
             p = self.tensor[item]
+            attribute_dims = self.attribute_dims
+        else:
+            raise NotImplementedError(f'Invalid slice {item}!')
+
         assert p.dim() == 2, \
             f'Indexing on Points with {item} failed to return a matrix!'
         return original_type(
-            p, points_dim=self.points_dim, attribute_dims=self.attribute_dims)
+            p, points_dim=p.shape[1], attribute_dims=attribute_dims)
 
     def __len__(self):
         """int: Number of points in the current object."""
@@ -236,10 +281,10 @@ class BasePoints(object):
         """Concatenate a list of Points into a single Points.
 
         Args:
-            points_list (list[:obj:`BaseInstancesPoints`]): List of points.
+            points_list (list[:obj:`BasePoints`]): List of points.
 
         Returns:
-            :obj:`BaseInstancesPoints`: The concatenated Points.
+            :obj:`BasePoints`: The concatenated Points.
         """
         assert isinstance(points_list, (list, tuple))
         if len(points_list) == 0:

mmdet3d/core/points/cam_points.py

@@ -17,11 +17,13 @@ class CameraPoints(BasePoints):
             Each row is (x, y, z, ...).
         attribute_dims (bool): Dictinory to indicate the meaning of extra
             dimension. Default to None.
+        rotation_axis (int): Default rotation axis for points rotation.
     """
 
     def __init__(self, tensor, points_dim=3, attribute_dims=None):
         super(CameraPoints, self).__init__(
             tensor, points_dim=points_dim, attribute_dims=attribute_dims)
+        self.rotation_axis = 1
 
     def flip(self, bev_direction='horizontal'):
         """Flip the boxes in BEV along given BEV direction."""

mmdet3d/core/points/depth_points.py

@@ -17,11 +17,13 @@ class DepthPoints(BasePoints):
             Each row is (x, y, z, ...).
         attribute_dims (bool): Dictinory to indicate the meaning of extra
             dimension. Default to None.
+        rotation_axis (int): Default rotation axis for points rotation.
     """
 
     def __init__(self, tensor, points_dim=3, attribute_dims=None):
         super(DepthPoints, self).__init__(
             tensor, points_dim=points_dim, attribute_dims=attribute_dims)
+        self.rotation_axis = 2
 
     def flip(self, bev_direction='horizontal'):
         """Flip the boxes in BEV along given BEV direction."""

mmdet3d/core/points/lidar_points.py

@@ -17,11 +17,13 @@ class LiDARPoints(BasePoints):
             Each row is (x, y, z, ...).
         attribute_dims (bool): Dictinory to indicate the meaning of extra
             dimension. Default to None.
+        rotation_axis (int): Default rotation axis for points rotation.
     """
 
     def __init__(self, tensor, points_dim=3, attribute_dims=None):
         super(LiDARPoints, self).__init__(
             tensor, points_dim=points_dim, attribute_dims=attribute_dims)
+        self.rotation_axis = 2
 
     def flip(self, bev_direction='horizontal'):
         """Flip the boxes in BEV along given BEV direction."""

mmdet3d/datasets/pipelines/dbsampler.py

@@ -100,6 +100,7 @@ class DataBaseSampler(object):
                  classes=None,
                  points_loader=dict(
                      type='LoadPointsFromFile',
+                     coord_type='LIDAR',
                      load_dim=4,
                      use_dim=[0, 1, 2, 3])):
         super().__init__()
@@ -253,7 +254,7 @@ class DataBaseSampler(object):
                     info['path']) if self.data_root else info['path']
                 results = dict(pts_filename=file_path)
                 s_points = self.points_loader(results)['points']
-                s_points[:, :3] += info['box3d_lidar'][:3]
+                s_points.translate(info['box3d_lidar'][:3])
 
                 count += 1
 
@@ -267,7 +268,7 @@ class DataBaseSampler(object):
                 'gt_bboxes_3d':
                 sampled_gt_bboxes,
                 'points':
-                np.concatenate(s_points_list, axis=0),
+                s_points_list[0].cat(s_points_list),
                 'group_ids':
                 np.arange(gt_bboxes.shape[0],
                           gt_bboxes.shape[0] + len(sampled))

mmdet3d/datasets/pipelines/formating.py

@@ -2,6 +2,7 @@ import numpy as np
 from mmcv.parallel import DataContainer as DC
 
 from mmdet3d.core.bbox import BaseInstance3DBoxes
+from mmdet3d.core.points import BasePoints
 from mmdet.datasets.builder import PIPELINES
 from mmdet.datasets.pipelines import to_tensor
 
@@ -71,6 +72,7 @@ class DefaultFormatBundle(object):
         if 'gt_semantic_seg' in results:
             results['gt_semantic_seg'] = DC(
                 to_tensor(results['gt_semantic_seg'][None, ...]), stack=True)
+
         return results
 
     def __repr__(self):
@@ -202,9 +204,11 @@ class DefaultFormatBundle3D(DefaultFormatBundle):
                 default bundle.
         """
         # Format 3D data
-        for key in [
-                'voxels', 'coors', 'voxel_centers', 'num_points', 'points'
-        ]:
+        if 'points' in results:
+            assert isinstance(results['points'], BasePoints)
+            results['points'] = DC(results['points'].tensor)
+
+        for key in ['voxels', 'coors', 'voxel_centers', 'num_points']:
             if key not in results:
                 continue
             results[key] = DC(to_tensor(results[key]), stack=False)