[Refactor] ImVoxelNet

configs/imvoxelnet/imvoxelnet_4x8_kitti-3d-car.py

 model = dict(
     type='ImVoxelNet',
+    data_preprocessor=dict(
+        type='Det3DDataPreprocessor',
+        mean=[123.675, 116.28, 103.53],
+        std=[58.395, 57.12, 57.375],
+        bgr_to_rgb=True,
+        pad_size_divisor=32),
     backbone=dict(
-        type='ResNet',
+        type='mmdet.ResNet',
         depth=50,
         num_stages=4,
         out_indices=(0, 1, 2, 3),
@@ -11,7 +17,7 @@ model = dict(
         init_cfg=dict(type='Pretrained', checkpoint='torchvision://resnet50'),
         style='pytorch'),
     neck=dict(
-        type='FPN',
+        type='mmdet.FPN',
         in_channels=[256, 512, 1024, 2048],
         out_channels=64,
         num_outs=4),
@@ -31,14 +37,16 @@ model = dict(
         diff_rad_by_sin=True,
         bbox_coder=dict(type='DeltaXYZWLHRBBoxCoder'),
         loss_cls=dict(
-            type='FocalLoss',
+            type='mmdet.FocalLoss',
             use_sigmoid=True,
             gamma=2.0,
             alpha=0.25,
             loss_weight=1.0),
-        loss_bbox=dict(type='SmoothL1Loss', beta=1.0 / 9.0, loss_weight=2.0),
+        loss_bbox=dict(
+            type='mmdet.SmoothL1Loss', beta=1.0 / 9.0, loss_weight=2.0),
         loss_dir=dict(
-            type='CrossEntropyLoss', use_sigmoid=False, loss_weight=0.2)),
+            type='mmdet.CrossEntropyLoss', use_sigmoid=False,
+            loss_weight=0.2)),
     n_voxels=[216, 248, 12],
     anchor_generator=dict(
         type='AlignedAnchor3DRangeGenerator',
@@ -46,8 +54,8 @@ model = dict(
         rotations=[.0]),
     train_cfg=dict(
         assigner=dict(
-            type='MaxIoUAssigner',
-            iou_calculator=dict(type='BboxOverlapsNearest3D'),
+            type='Max3DIoUAssigner',
+            iou_calculator=dict(type='mmdet3d.BboxOverlapsNearest3D'),
             pos_iou_thr=0.6,
             neg_iou_thr=0.45,
             min_pos_iou=0.45,
@@ -69,92 +77,119 @@ data_root = 'data/kitti/'
 class_names = ['Car']
 input_modality = dict(use_lidar=False, use_camera=True)
 point_cloud_range = [0, -39.68, -3, 69.12, 39.68, 1]
-img_norm_cfg = dict(
-    mean=[123.675, 116.28, 103.53], std=[58.395, 57.12, 57.375], to_rgb=True)
+metainfo = dict(CLASSES=class_names)
+
+# file_client_args = dict(backend='disk')
+# Uncomment the following if use ceph or other file clients.
+# See https://mmcv.readthedocs.io/en/latest/api.html#mmcv.fileio.FileClient
+# for more details.
+file_client_args = dict(
+    backend='petrel',
+    path_mapping=dict({
+        './data/kitti/':
+        's3://openmmlab/datasets/detection3d/kitti/',
+        'data/kitti/':
+        's3://openmmlab/datasets/detection3d/kitti/'
+    }))
 
 train_pipeline = [
     dict(type='LoadAnnotations3D'),
-    dict(type='LoadImageFromFile'),
+    dict(type='LoadImageFromFileMono3D', file_client_args=file_client_args),
     dict(type='RandomFlip3D', flip_ratio_bev_horizontal=0.5),
     dict(
-        type='Resize',
-        img_scale=[(1173, 352), (1387, 416)],
-        keep_ratio=True,
-        multiscale_mode='range'),
-    dict(type='Normalize', **img_norm_cfg),
-    dict(type='Pad', size_divisor=32),
+        type='RandomResize', scale=[(1173, 352), (1387, 416)],
+        keep_ratio=True),
     dict(type='ObjectRangeFilter', point_cloud_range=point_cloud_range),
-    dict(type='DefaultFormatBundle3D', class_names=class_names),
-    dict(type='Collect3D', keys=['img', 'gt_bboxes_3d', 'gt_labels_3d'])
+    dict(type='Pack3DDetInputs', keys=['img', 'gt_bboxes_3d', 'gt_labels_3d'])
 ]
 test_pipeline = [
-    dict(type='LoadImageFromFile'),
-    dict(type='Resize', img_scale=(1280, 384), keep_ratio=True),
-    dict(type='Normalize', **img_norm_cfg),
-    dict(type='Pad', size_divisor=32),
-    dict(
-        type='DefaultFormatBundle3D',
-        class_names=class_names,
-        with_label=False),
-    dict(type='Collect3D', keys=['img'])
+    dict(type='LoadImageFromFileMono3D', file_client_args=file_client_args),
+    dict(type='Resize', scale=(1280, 384), keep_ratio=True),
+    dict(type='Pack3DDetInputs', keys=['img'])
 ]
 
-data = dict(
-    samples_per_gpu=4,
-    workers_per_gpu=4,
-    train=dict(
+train_dataloader = dict(
+    batch_size=4,
+    num_workers=4,
+    persistent_workers=True,
+    sampler=dict(type='DefaultSampler', shuffle=True),
+    dataset=dict(
         type='RepeatDataset',
         times=3,
         dataset=dict(
             type=dataset_type,
             data_root=data_root,
-            ann_file=data_root + 'kitti_infos_train.pkl',
-            split='training',
-            pts_prefix='velodyne_reduced',
+            ann_file='kitti_infos_train.pkl',
+            data_prefix=dict(img='training/image_2'),
             pipeline=train_pipeline,
             modality=input_modality,
-            classes=class_names,
-            test_mode=False)),
-    val=dict(
+            test_mode=False,
+            metainfo=metainfo)))
+val_dataloader = dict(
+    batch_size=1,
+    num_workers=1,
+    persistent_workers=True,
+    drop_last=False,
+    sampler=dict(type='DefaultSampler', shuffle=False),
+    dataset=dict(
         type=dataset_type,
         data_root=data_root,
-        ann_file=data_root + 'kitti_infos_val.pkl',
-        split='training',
-        pts_prefix='velodyne_reduced',
+        ann_file='kitti_infos_val.pkl',
+        data_prefix=dict(img='training/image_2'),
         pipeline=test_pipeline,
         modality=input_modality,
-        classes=class_names,
-        test_mode=True),
-    test=dict(
-        type=dataset_type,
-        data_root=data_root,
-        ann_file=data_root + 'kitti_infos_val.pkl',
-        split='training',
-        pts_prefix='velodyne_reduced',
-        pipeline=test_pipeline,
-        modality=input_modality,
-        classes=class_names,
-        test_mode=True))
+        test_mode=True,
+        metainfo=metainfo))
+test_dataloader = val_dataloader
+
+val_evaluator = dict(
+    type='KittiMetric',
+    ann_file=data_root + 'kitti_infos_val.pkl',
+    metric='bbox')
+test_evaluator = val_evaluator
 
-optimizer = dict(
-    type='AdamW',
-    lr=0.0001,
-    weight_decay=0.0001,
+# optimizer
+optim_wrapper = dict(
+    type='OptimWrapper',
+    optimizer=dict(type='AdamW', lr=0.0001, weight_decay=0.0001),
     paramwise_cfg=dict(
-        custom_keys={'backbone': dict(lr_mult=0.1, decay_mult=1.0)}))
-optimizer_config = dict(grad_clip=dict(max_norm=35., norm_type=2))
-lr_config = dict(policy='step', step=[8, 11])
-total_epochs = 12
+        custom_keys={'backbone': dict(lr_mult=0.1, decay_mult=1.0)}),
+    clip_grad=dict(max_norm=35., norm_type=2))
+param_scheduler = [
+    dict(
+        type='MultiStepLR',
+        begin=0,
+        end=12,
+        by_epoch=True,
+        milestones=[8, 11],
+        gamma=0.1)
+]
+
+# hooks
+default_hooks = dict(
+    timer=dict(type='IterTimerHook'),
+    logger=dict(type='LoggerHook', interval=50),
+    param_scheduler=dict(type='ParamSchedulerHook'),
+    checkpoint=dict(type='CheckpointHook', interval=1, max_keep_ckpts=1),
+    sampler_seed=dict(type='DistSamplerSeedHook'),
+)
+
+# training schedule for 2x
+train_cfg = dict(type='EpochBasedTrainLoop', max_epochs=12, val_interval=1)
+val_cfg = dict(type='ValLoop')
+test_cfg = dict(type='TestLoop')
+
+# runtime
+default_scope = 'mmdet3d'
+
+env_cfg = dict(
+    cudnn_benchmark=False,
+    mp_cfg=dict(mp_start_method='fork', opencv_num_threads=0),
+    dist_cfg=dict(backend='nccl'),
+)
 
-checkpoint_config = dict(interval=1, max_keep_ckpts=1)
-log_config = dict(
-    interval=50,
-    hooks=[dict(type='TextLoggerHook'),
-           dict(type='TensorboardLoggerHook')])
-evaluation = dict(interval=1)
-dist_params = dict(backend='nccl')
-find_unused_parameters = True  # only 1 of 4 FPN outputs is used
 log_level = 'INFO'
 load_from = None
-resume_from = None
-workflow = [('train', 1)]
+resume = False
+dist_params = dict(backend='nccl')
+find_unused_parameters = True  # only 1 of 4 FPN outputs is used

mmdet3d/datasets/det3d_dataset.py

@@ -259,7 +259,7 @@ class Det3DDataset(BaseDataset):
                     info['lidar2img'] = info['cam2img'] @ info['lidar2cam']
 
         if not self.test_mode:
-            # used in traing
+            # used in training
             info['ann_info'] = self.parse_ann_info(info)
         if self.test_mode and self.load_eval_anns:
             info['eval_ann_info'] = self.parse_ann_info(info)

mmdet3d/models/dense_heads/smoke_mono3d_head.py

@@ -507,8 +507,8 @@ class SMOKEMono3DHead(AnchorFreeMono3DHead):
             dict[str, Tensor]: A dictionary of loss components, which has
                 components below:
 
-                - loss_cls (Tensor): loss of cls heatmap.
-                - loss_bbox (Tensor): loss of bbox heatmap.
+            - loss_cls (Tensor): loss of cls heatmap.
+            - loss_bbox (Tensor): loss of bbox heatmap.
         """
         assert len(cls_scores) == len(bbox_preds) == 1
         center_2d_heatmap = cls_scores[0]

mmdet3d/models/detectors/imvoxelnet.py

 # Copyright (c) OpenMMLab. All rights reserved.
+from typing import List, Tuple, Union
+
 import torch
 
-from mmdet3d.core import bbox3d2result, build_prior_generator
+from mmdet3d.core import Det3DDataSample, InstanceList, build_prior_generator
+from mmdet3d.core.utils import ConfigType, OptConfigType, SampleList
 from mmdet3d.models.fusion_layers.point_fusion import point_sample
 from mmdet3d.registry import MODELS
 from mmdet.models.detectors import BaseDetector
@@ -9,20 +12,40 @@ from mmdet.models.detectors import BaseDetector
 
 @MODELS.register_module()
 class ImVoxelNet(BaseDetector):
-    r"""`ImVoxelNet <https://arxiv.org/abs/2106.01178>`_."""
+    r"""`ImVoxelNet <https://arxiv.org/abs/2106.01178>`_.
+
+    Args:
+        backbone (:obj:`ConfigDict` or dict): The backbone config.
+        neck (:obj:`ConfigDict` or dict): The neck config.
+        neck_3d (:obj:`ConfigDict` or dict): The 3D neck config.
+        bbox_head (:obj:`ConfigDict` or dict): The bbox head config.
+        n_voxels (list): Number of voxels along x, y, z axis.
+        anchor_generator (:obj:`ConfigDict` or dict): The anchor generator
+            config.
+        train_cfg (:obj:`ConfigDict` or dict, optional): Config dict of
+            training hyper-parameters. Defaults to None.
+        test_cfg (:obj:`ConfigDict` or dict, optional): Config dict of test
+            hyper-parameters. Defaults to None.
+        data_preprocessor (dict or ConfigDict, optional): The pre-process
+            config of :class:`BaseDataPreprocessor`.  it usually includes,
+                ``pad_size_divisor``, ``pad_value``, ``mean`` and ``std``.
+        init_cfg (:obj:`ConfigDict` or dict, optional): The initialization
+            config. Defaults to None.
+    """
 
     def __init__(self,
-                 backbone,
-                 neck,
-                 neck_3d,
-                 bbox_head,
-                 n_voxels,
-                 anchor_generator,
-                 train_cfg=None,
-                 test_cfg=None,
-                 pretrained=None,
-                 init_cfg=None):
-        super().__init__(init_cfg=init_cfg)
+                 backbone: ConfigType,
+                 neck: ConfigType,
+                 neck_3d: ConfigType,
+                 bbox_head: ConfigType,
+                 n_voxels: List,
+                 anchor_generator: ConfigType,
+                 train_cfg: OptConfigType = None,
+                 test_cfg: OptConfigType = None,
+                 data_preprocessor: OptConfigType = None,
+                 init_cfg: OptConfigType = None):
+        super().__init__(
+            data_preprocessor=data_preprocessor, init_cfg=init_cfg)
         self.backbone = MODELS.build(backbone)
         self.neck = MODELS.build(neck)
         self.neck_3d = MODELS.build(neck_3d)
@@ -34,22 +57,59 @@ class ImVoxelNet(BaseDetector):
         self.train_cfg = train_cfg
         self.test_cfg = test_cfg
 
-    def extract_feat(self, img, img_metas):
+    def convert_to_datasample(self, results_list: InstanceList) -> SampleList:
+        """Convert results list to `Det3DDataSample`.
+
+        Args:
+            results_list (list[:obj:`InstanceData`]): 3D Detection results of
+                each image.
+
+        Returns:
+            list[:obj:`Det3DDataSample`]: 3D Detection results of the
+            input images. Each Det3DDataSample usually contain
+            'pred_instances_3d'. And the ``pred_instances_3d`` usually
+            contains following keys.
+
+                - scores_3d (Tensor): Classification scores, has a shape
+                    (num_instance, )
+                - labels_3d (Tensor): Labels of bboxes, has a shape
+                    (num_instances, ).
+                - bboxes_3d (Tensor): Contains a tensor with shape
+                    (num_instances, C) where C >=7.
+        """
+        out_results_list = []
+        for i in range(len(results_list)):
+            result = Det3DDataSample()
+            result.pred_instances_3d = results_list[i]
+            out_results_list.append(result)
+        return out_results_list
+
+    def extract_feat(self, batch_inputs_dict: dict,
+                     batch_data_samples: SampleList):
         """Extract 3d features from the backbone -> fpn -> 3d projection.
 
         Args:
-            img (torch.Tensor): Input images of shape (N, C_in, H, W).
-            img_metas (list): Image metas.
+            batch_inputs_dict (dict): The model input dict which include
+                the 'imgs' key.
+
+                    - imgs (torch.Tensor, optional): Image of each sample.
+            batch_data_samples (list[:obj:`DetDataSample`]): The batch
+                data samples. It usually includes information such
+                as `gt_instance` or `gt_panoptic_seg` or `gt_sem_seg`.
 
         Returns:
             torch.Tensor: of shape (N, C_out, N_x, N_y, N_z)
         """
+        img = batch_inputs_dict['imgs']
+        batch_img_metas = [
+            data_samples.metainfo for data_samples in batch_data_samples
+        ]
         x = self.backbone(img)
         x = self.neck(x)[0]
         points = self.anchor_generator.grid_anchors(
             [self.n_voxels[::-1]], device=img.device)[0][:, :3]
         volumes = []
-        for feature, img_meta in zip(x, img_metas):
+        for feature, img_meta in zip(x, batch_img_metas):
             img_scale_factor = (
                 points.new_tensor(img_meta['scale_factor'][:2])
                 if 'scale_factor' in img_meta.keys() else 1)
@@ -57,11 +117,12 @@ class ImVoxelNet(BaseDetector):
             img_crop_offset = (
                 points.new_tensor(img_meta['img_crop_offset'])
                 if 'img_crop_offset' in img_meta.keys() else 0)
+            lidar2img = points.new_tensor(img_meta['lidar2img'])
             volume = point_sample(
                 img_meta,
                 img_features=feature[None, ...],
                 points=points,
-                proj_mat=points.new_tensor(img_meta['lidar2img']),
+                proj_mat=lidar2img,
                 coord_type='LIDAR',
                 img_scale_factor=img_scale_factor,
                 img_crop_offset=img_crop_offset,
@@ -75,64 +136,77 @@ class ImVoxelNet(BaseDetector):
         x = self.neck_3d(x)
         return x
 
-    def forward_train(self, img, img_metas, gt_bboxes_3d, gt_labels_3d,
-                      **kwargs):
-        """Forward of training.
+    def loss(self, batch_inputs_dict: dict, batch_data_samples: SampleList,
+             **kwargs) -> Union[dict, list]:
+        """Calculate losses from a batch of inputs and data samples.
 
         Args:
-            img (torch.Tensor): Input images of shape (N, C_in, H, W).
-            img_metas (list): Image metas.
-            gt_bboxes_3d (:obj:`BaseInstance3DBoxes`): gt bboxes of each batch.
-            gt_labels_3d (list[torch.Tensor]): gt class labels of each batch.
+            batch_inputs_dict (dict): The model input dict which include
+                the 'imgs' key.
+
+                    - imgs (torch.Tensor, optional): Image of each sample.
+            batch_data_samples (list[:obj:`DetDataSample`]): The batch
+                data samples. It usually includes information such
+                as `gt_instance` or `gt_panoptic_seg` or `gt_sem_seg`.
 
         Returns:
-            dict[str, torch.Tensor]: A dictionary of loss components.
+            dict: A dictionary of loss components.
         """
-        x = self.extract_feat(img, img_metas)
-        x = self.bbox_head(x)
-        losses = self.bbox_head.loss(*x, gt_bboxes_3d, gt_labels_3d, img_metas)
+
+        x = self.extract_feat(batch_inputs_dict, batch_data_samples)
+        losses = self.bbox_head.loss(x, batch_data_samples, **kwargs)
         return losses
 
-    def forward_test(self, img, img_metas, **kwargs):
-        """Forward of testing.
+    def predict(self, batch_inputs_dict: dict, batch_data_samples: SampleList,
+                **kwargs) -> SampleList:
+        """Predict results from a batch of inputs and data samples with post-
+        processing.
 
         Args:
-            img (torch.Tensor): Input images of shape (N, C_in, H, W).
-            img_metas (list): Image metas.
-
-        Returns:
-            list[dict]: Predicted 3d boxes.
-        """
-        # not supporting aug_test for now
-        return self.simple_test(img, img_metas)
+            batch_inputs_dict (dict): The model input dict which include
+                the 'imgs' key.
 
-    def simple_test(self, img, img_metas):
-        """Test without augmentations.
+                    - imgs (torch.Tensor, optional): Image of each sample.
 
-        Args:
-            img (torch.Tensor): Input images of shape (N, C_in, H, W).
-            img_metas (list): Image metas.
+            batch_data_samples (List[:obj:`Det3DDataSample`]): The Data
+                Samples. It usually includes information such as
+                `gt_instance_3d`, `gt_panoptic_seg_3d` and `gt_sem_seg_3d`.
 
         Returns:
-            list[dict]: Predicted 3d boxes.
+            list[:obj:`Det3DDataSample`]: Detection results of the
+            input images. Each Det3DDataSample usually contain
+            'pred_instances_3d'. And the ``pred_instances_3d`` usually
+            contains following keys.
+
+                - scores_3d (Tensor): Classification scores, has a shape
+                    (num_instance, )
+                - labels_3d (Tensor): Labels of bboxes, has a shape
+                    (num_instances, ).
+                - bboxes_3d (Tensor): Contains a tensor with shape
+                    (num_instances, C) where C >=7.
         """
-        x = self.extract_feat(img, img_metas)
-        x = self.bbox_head(x)
-        bbox_list = self.bbox_head.get_bboxes(*x, img_metas)
-        bbox_results = [
-            bbox3d2result(det_bboxes, det_scores, det_labels)
-            for det_bboxes, det_scores, det_labels in bbox_list
-        ]
-        return bbox_results
+        x = self.extract_feat(batch_inputs_dict, batch_data_samples)
+        results_list = self.bbox_head.predict(x, batch_data_samples, **kwargs)
+        predictions = self.convert_to_datasample(results_list)
+        return predictions
 
-    def aug_test(self, imgs, img_metas, **kwargs):
-        """Test with augmentations.
+    def _forward(self, batch_inputs_dict: dict, batch_data_samples: SampleList,
+                 *args, **kwargs) -> Tuple[List[torch.Tensor]]:
+        """Network forward process. Usually includes backbone, neck and head
+        forward without any post-processing.
 
         Args:
-            imgs (list[torch.Tensor]): Input images of shape (N, C_in, H, W).
-            img_metas (list): Image metas.
+            batch_inputs_dict (dict): The model input dict which include
+                the 'imgs' key.
+
+                    - imgs (torch.Tensor, optional): Image of each sample.
+            batch_data_samples (List[:obj:`Det3DDataSample`]): The Data
+                Samples. It usually includes information such as
+                `gt_instance_3d`, `gt_panoptic_seg_3d` and `gt_sem_seg_3d`.
 
         Returns:
-            list[dict]: Predicted 3d boxes.
+            tuple[list]: A tuple of features from ``bbox_head`` forward.
         """
-        raise NotImplementedError
+        x = self.extract_feat(batch_inputs_dict, batch_data_samples)
+        results = self.bbox_head.forward(x)
+        return results

tests/test_models/test_detectors/test_imvoxelnet.py

+import unittest
+
+import torch
+from mmengine import DefaultScope
+
+from mmdet3d.registry import MODELS
+from tests.utils.model_utils import (_create_detector_inputs,
+                                     _get_detector_cfg, _setup_seed)
+
+
+class TestImVoxelNet(unittest.TestCase):
+
+    def test_h3dnet(self):
+        import mmdet3d.models
+
+        assert hasattr(mmdet3d.models, 'ImVoxelNet')
+        DefaultScope.get_instance('test_ImVoxelNet', scope_name='mmdet3d')
+        _setup_seed(0)
+        imvoxel_net_cfg = _get_detector_cfg(
+            'imvoxelnet/imvoxelnet_4x8_kitti-3d-car.py')
+        model = MODELS.build(imvoxel_net_cfg)
+        num_gt_instance = 1
+        data = [
+            _create_detector_inputs(
+                with_points=False,
+                with_img=True,
+                img_size=(384, 1280),
+                num_gt_instance=num_gt_instance,
+                with_pts_semantic_mask=False,
+                with_pts_instance_mask=False)
+        ]
+
+        if torch.cuda.is_available():
+            model = model.cuda()
+            # test simple_test
+            with torch.no_grad():
+                batch_inputs, data_samples = model.data_preprocessor(
+                    data, True)
+                results = model.forward(
+                    batch_inputs, data_samples, mode='predict')
+            self.assertEqual(len(results), len(data))
+            self.assertIn('bboxes_3d', results[0].pred_instances_3d)
+            self.assertIn('scores_3d', results[0].pred_instances_3d)
+            self.assertIn('labels_3d', results[0].pred_instances_3d)
+
+            # save the memory
+            with torch.no_grad():
+                losses = model.forward(batch_inputs, data_samples, mode='loss')
+
+            self.assertGreater(losses['loss_cls'], 0)
+            self.assertGreater(losses['loss_bbox'], 0)
+            self.assertGreater(losses['loss_dir'], 0)

tests/utils/model_utils.py

@@ -104,10 +104,16 @@ def _create_detector_inputs(seed=0,
         points = torch.rand([num_points, points_feat_dim])
     else:
         points = None
+
     if with_img:
-        img = torch.rand(3, img_size, img_size)
-        meta_info['img_shape'] = (img_size, img_size)
-        meta_info['ori_shape'] = (img_size, img_size)
+        if isinstance(img_size, tuple):
+            img = torch.rand(3, img_size[0], img_size[1])
+            meta_info['img_shape'] = img_size
+            meta_info['ori_shape'] = img_size
+        else:
+            img = torch.rand(3, img_size, img_size)
+            meta_info['img_shape'] = (img_size, img_size)
+            meta_info['ori_shape'] = (img_size, img_size)
         meta_info['scale_factor'] = np.array([1., 1.])
 
     else:
@@ -126,9 +132,8 @@ def _create_detector_inputs(seed=0,
     gt_instance = InstanceData()
     gt_instance.labels = torch.randint(0, num_classes, [num_gt_instance])
     gt_instance.bboxes = torch.rand(num_gt_instance, 4)
-    gt_instance.bboxes[:,
-                       2:] = gt_instance.bboxes[:, :2] + gt_instance.bboxes[:,
-                                                                            2:]
+    gt_instance.bboxes[:, 2:] = \
+        gt_instance.bboxes[:, :2] + gt_instance.bboxes[:, 2:]
 
     data_sample.gt_instances = gt_instance
     data_sample.gt_pts_seg = PointData()