import copy
import mmcv
import numpy as np
import tempfile
import torch
from mmcv.utils import print_log
from os import path as osp
from mmdet.datasets import DATASETS
from ..core.bbox import Box3DMode, CameraInstance3DBoxes, points_cam2img
from .nuscenes_mono_dataset import NuScenesMonoDataset
[docs]@DATASETS.register_module()
class KittiMonoDataset(NuScenesMonoDataset):
"""Monocular 3D detection on KITTI Dataset.
Args:
data_root (str): Path of dataset root.
info_file (str): Path of info file.
load_interval (int, optional): Interval of loading the dataset. It is
used to uniformly sample the dataset. Defaults to 1.
with_velocity (bool, optional): Whether include velocity prediction
into the experiments. Defaults to False.
eval_version (str, optional): Configuration version of evaluation.
Defaults to None.
version (str, optional): Dataset version. Defaults to None.
kwargs (dict): Other arguments are the same of NuScenesMonoDataset.
"""
CLASSES = ('Pedestrian', 'Cyclist', 'Car')
def __init__(self,
data_root,
info_file,
load_interval=1,
with_velocity=False,
eval_version=None,
version=None,
**kwargs):
super().__init__(
data_root=data_root,
load_interval=load_interval,
with_velocity=with_velocity,
eval_version=eval_version,
version=version,
**kwargs)
self.anno_infos = mmcv.load(info_file)
self.bbox_code_size = 7
def _parse_ann_info(self, img_info, ann_info):
"""Parse bbox and mask annotation.
Args:
ann_info (list[dict]): Annotation info of an image.
with_mask (bool): Whether to parse mask annotations.
Returns:
dict: A dict containing the following keys: bboxes, bboxes_ignore,\
labels, masks, seg_map. "masks" are raw annotations and not \
decoded into binary masks.
"""
gt_bboxes = []
gt_labels = []
gt_bboxes_ignore = []
gt_masks_ann = []
gt_bboxes_cam3d = []
centers2d = []
depths = []
for i, ann in enumerate(ann_info):
if ann.get('ignore', False):
continue
x1, y1, w, h = ann['bbox']
inter_w = max(0, min(x1 + w, img_info['width']) - max(x1, 0))
inter_h = max(0, min(y1 + h, img_info['height']) - max(y1, 0))
if inter_w * inter_h == 0:
continue
if ann['area'] <= 0 or w < 1 or h < 1:
continue
if ann['category_id'] not in self.cat_ids:
continue
bbox = [x1, y1, x1 + w, y1 + h]
if ann.get('iscrowd', False):
gt_bboxes_ignore.append(bbox)
else:
gt_bboxes.append(bbox)
gt_labels.append(self.cat2label[ann['category_id']])
gt_masks_ann.append(ann.get('segmentation', None))
# 3D annotations in camera coordinates
bbox_cam3d = np.array(ann['bbox_cam3d']).reshape(-1, )
gt_bboxes_cam3d.append(bbox_cam3d)
# 2.5D annotations in camera coordinates
center2d = ann['center2d'][:2]
depth = ann['center2d'][2]
centers2d.append(center2d)
depths.append(depth)
if gt_bboxes:
gt_bboxes = np.array(gt_bboxes, dtype=np.float32)
gt_labels = np.array(gt_labels, dtype=np.int64)
else:
gt_bboxes = np.zeros((0, 4), dtype=np.float32)
gt_labels = np.array([], dtype=np.int64)
if gt_bboxes_cam3d:
gt_bboxes_cam3d = np.array(gt_bboxes_cam3d, dtype=np.float32)
centers2d = np.array(centers2d, dtype=np.float32)
depths = np.array(depths, dtype=np.float32)
else:
gt_bboxes_cam3d = np.zeros((0, self.bbox_code_size),
dtype=np.float32)
centers2d = np.zeros((0, 2), dtype=np.float32)
depths = np.zeros((0), dtype=np.float32)
gt_bboxes_cam3d = CameraInstance3DBoxes(
gt_bboxes_cam3d,
box_dim=gt_bboxes_cam3d.shape[-1],
origin=(0.5, 0.5, 0.5))
gt_labels_3d = copy.deepcopy(gt_labels)
if gt_bboxes_ignore:
gt_bboxes_ignore = np.array(gt_bboxes_ignore, dtype=np.float32)
else:
gt_bboxes_ignore = np.zeros((0, 4), dtype=np.float32)
seg_map = img_info['filename'].replace('jpg', 'png')
ann = dict(
bboxes=gt_bboxes,
labels=gt_labels,
gt_bboxes_3d=gt_bboxes_cam3d,
gt_labels_3d=gt_labels_3d,
centers2d=centers2d,
depths=depths,
bboxes_ignore=gt_bboxes_ignore,
masks=gt_masks_ann,
seg_map=seg_map)
return ann
[docs] def evaluate(self,
results,
metric=None,
logger=None,
pklfile_prefix=None,
submission_prefix=None,
show=False,
out_dir=None):
"""Evaluation in KITTI protocol.
Args:
results (list[dict]): Testing results of the dataset.
metric (str | list[str]): Metrics to be evaluated.
logger (logging.Logger | str | None): Logger used for printing
related information during evaluation. Default: None.
pklfile_prefix (str | None): The prefix of pkl files. It includes
the file path and the prefix of filename, e.g., "a/b/prefix".
If not specified, a temp file will be created. Default: None.
submission_prefix (str | None): The prefix of submission datas.
If not specified, the submission data will not be generated.
show (bool): Whether to visualize.
Default: False.
out_dir (str): Path to save the visualization results.
Default: None.
Returns:
dict[str, float]: Results of each evaluation metric.
"""
result_files, tmp_dir = self.format_results(results, pklfile_prefix)
from mmdet3d.core.evaluation import kitti_eval
gt_annos = [info['annos'] for info in self.anno_infos]
if isinstance(result_files, dict):
ap_dict = dict()
for name, result_files_ in result_files.items():
eval_types = ['bbox', 'bev', '3d']
if '2d' in name:
eval_types = ['bbox']
ap_result_str, ap_dict_ = kitti_eval(
gt_annos,
result_files_,
self.CLASSES,
eval_types=eval_types)
for ap_type, ap in ap_dict_.items():
ap_dict[f'{name}/{ap_type}'] = float('{:.4f}'.format(ap))
print_log(
f'Results of {name}:\n' + ap_result_str, logger=logger)
else:
if metric == 'img_bbox2d':
ap_result_str, ap_dict = kitti_eval(
gt_annos, result_files, self.CLASSES, eval_types=['bbox'])
else:
ap_result_str, ap_dict = kitti_eval(gt_annos, result_files,
self.CLASSES)
print_log('\n' + ap_result_str, logger=logger)
if tmp_dir is not None:
tmp_dir.cleanup()
if show:
self.show(results, out_dir)
return ap_dict
[docs] def bbox2result_kitti(self,
net_outputs,
class_names,
pklfile_prefix=None,
submission_prefix=None):
"""Convert 3D detection results to kitti format for evaluation and test
submission.
Args:
net_outputs (list[np.ndarray]): List of array storing the \
inferenced bounding boxes and scores.
class_names (list[String]): A list of class names.
pklfile_prefix (str | None): The prefix of pkl file.
submission_prefix (str | None): The prefix of submission file.
Returns:
list[dict]: A list of dictionaries with the kitti format.
"""
assert len(net_outputs) == len(self.anno_infos)
if submission_prefix is not None:
mmcv.mkdir_or_exist(submission_prefix)
det_annos = []
print('\nConverting prediction to KITTI format')
for idx, pred_dicts in enumerate(
mmcv.track_iter_progress(net_outputs)):
annos = []
info = self.anno_infos[idx]
sample_idx = info['image']['image_idx']
image_shape = info['image']['image_shape'][:2]
box_dict = self.convert_valid_bboxes(pred_dicts, info)
anno = {
'name': [],
'truncated': [],
'occluded': [],
'alpha': [],
'bbox': [],
'dimensions': [],
'location': [],
'rotation_y': [],
'score': []
}
if len(box_dict['bbox']) > 0:
box_2d_preds = box_dict['bbox']
box_preds = box_dict['box3d_camera']
scores = box_dict['scores']
box_preds_lidar = box_dict['box3d_lidar']
label_preds = box_dict['label_preds']
for box, box_lidar, bbox, score, label in zip(
box_preds, box_preds_lidar, box_2d_preds, scores,
label_preds):
bbox[2:] = np.minimum(bbox[2:], image_shape[::-1])
bbox[:2] = np.maximum(bbox[:2], [0, 0])
anno['name'].append(class_names[int(label)])
anno['truncated'].append(0.0)
anno['occluded'].append(0)
anno['alpha'].append(-np.arctan2(box[0], box[2]) + box[6])
anno['bbox'].append(bbox)
anno['dimensions'].append(box[3:6])
anno['location'].append(box[:3])
anno['rotation_y'].append(box[6])
anno['score'].append(score)
anno = {k: np.stack(v) for k, v in anno.items()}
annos.append(anno)
else:
anno = {
'name': np.array([]),
'truncated': np.array([]),
'occluded': np.array([]),
'alpha': np.array([]),
'bbox': np.zeros([0, 4]),
'dimensions': np.zeros([0, 3]),
'location': np.zeros([0, 3]),
'rotation_y': np.array([]),
'score': np.array([]),
}
annos.append(anno)
if submission_prefix is not None:
curr_file = f'{submission_prefix}/{sample_idx:06d}.txt'
with open(curr_file, 'w') as f:
bbox = anno['bbox']
loc = anno['location']
dims = anno['dimensions'] # lhw -> hwl
for idx in range(len(bbox)):
print(
'{} -1 -1 {:.4f} {:.4f} {:.4f} {:.4f} '
'{:.4f} {:.4f} {:.4f} '
'{:.4f} {:.4f} {:.4f} {:.4f} {:.4f} {:.4f}'.format(
anno['name'][idx], anno['alpha'][idx],
bbox[idx][0], bbox[idx][1], bbox[idx][2],
bbox[idx][3], dims[idx][1], dims[idx][2],
dims[idx][0], loc[idx][0], loc[idx][1],
loc[idx][2], anno['rotation_y'][idx],
anno['score'][idx]),
file=f)
annos[-1]['sample_idx'] = np.array(
[sample_idx] * len(annos[-1]['score']), dtype=np.int64)
det_annos += annos
if pklfile_prefix is not None:
if not pklfile_prefix.endswith(('.pkl', '.pickle')):
out = f'{pklfile_prefix}.pkl'
mmcv.dump(det_annos, out)
print('Result is saved to %s' % out)
return det_annos
[docs] def bbox2result_kitti2d(self,
net_outputs,
class_names,
pklfile_prefix=None,
submission_prefix=None):
"""Convert 2D detection results to kitti format for evaluation and test
submission.
Args:
net_outputs (list[np.ndarray]): List of array storing the \
inferenced bounding boxes and scores.
class_names (list[String]): A list of class names.
pklfile_prefix (str | None): The prefix of pkl file.
submission_prefix (str | None): The prefix of submission file.
Returns:
list[dict]: A list of dictionaries have the kitti format
"""
assert len(net_outputs) == len(self.anno_infos)
det_annos = []
print('\nConverting prediction to KITTI format')
for i, bboxes_per_sample in enumerate(
mmcv.track_iter_progress(net_outputs)):
annos = []
anno = dict(
name=[],
truncated=[],
occluded=[],
alpha=[],
bbox=[],
dimensions=[],
location=[],
rotation_y=[],
score=[])
sample_idx = self.anno_infos[i]['image']['image_idx']
num_example = 0
for label in range(len(bboxes_per_sample)):
bbox = bboxes_per_sample[label]
for i in range(bbox.shape[0]):
anno['name'].append(class_names[int(label)])
anno['truncated'].append(0.0)
anno['occluded'].append(0)
anno['alpha'].append(-10)
anno['bbox'].append(bbox[i, :4])
# set dimensions (height, width, length) to zero
anno['dimensions'].append(
np.zeros(shape=[3], dtype=np.float32))
# set the 3D translation to (-1000, -1000, -1000)
anno['location'].append(
np.ones(shape=[3], dtype=np.float32) * (-1000.0))
anno['rotation_y'].append(0.0)
anno['score'].append(bbox[i, 4])
num_example += 1
if num_example == 0:
annos.append(
dict(
name=np.array([]),
truncated=np.array([]),
occluded=np.array([]),
alpha=np.array([]),
bbox=np.zeros([0, 4]),
dimensions=np.zeros([0, 3]),
location=np.zeros([0, 3]),
rotation_y=np.array([]),
score=np.array([]),
))
else:
anno = {k: np.stack(v) for k, v in anno.items()}
annos.append(anno)
annos[-1]['sample_idx'] = np.array(
[sample_idx] * num_example, dtype=np.int64)
det_annos += annos
if pklfile_prefix is not None:
if not pklfile_prefix.endswith(('.pkl', '.pickle')):
out = f'{pklfile_prefix}.pkl'
mmcv.dump(det_annos, out)
print('Result is saved to %s' % out)
if submission_prefix is not None:
# save file in submission format
mmcv.mkdir_or_exist(submission_prefix)
print(f'Saving KITTI submission to {submission_prefix}')
for i, anno in enumerate(det_annos):
sample_idx = self.anno_infos[i]['image']['image_idx']
cur_det_file = f'{submission_prefix}/{sample_idx:06d}.txt'
with open(cur_det_file, 'w') as f:
bbox = anno['bbox']
loc = anno['location']
dims = anno['dimensions'][::-1] # lhw -> hwl
for idx in range(len(bbox)):
print(
'{} -1 -1 {:4f} {:4f} {:4f} {:4f} {:4f} {:4f} '
'{:4f} {:4f} {:4f} {:4f} {:4f} {:4f} {:4f}'.format(
anno['name'][idx],
anno['alpha'][idx],
*bbox[idx], # 4 float
*dims[idx], # 3 float
*loc[idx], # 3 float
anno['rotation_y'][idx],
anno['score'][idx]),
file=f,
)
print(f'Result is saved to {submission_prefix}')
return det_annos
[docs] def convert_valid_bboxes(self, box_dict, info):
"""Convert the predicted boxes into valid ones.
Args:
box_dict (dict): Box dictionaries to be converted.
- boxes_3d (:obj:`CameraInstance3DBoxes`): 3D bounding boxes.
- scores_3d (torch.Tensor): Scores of boxes.
- labels_3d (torch.Tensor): Class labels of boxes.
info (dict): Data info.
Returns:
dict: Valid predicted boxes.
- bbox (np.ndarray): 2D bounding boxes.
- box3d_camera (np.ndarray): 3D bounding boxes in \
camera coordinate.
- scores (np.ndarray): Scores of boxes.
- label_preds (np.ndarray): Class label predictions.
- sample_idx (int): Sample index.
"""
box_preds = box_dict['boxes_3d']
scores = box_dict['scores_3d']
labels = box_dict['labels_3d']
sample_idx = info['image']['image_idx']
if len(box_preds) == 0:
return dict(
bbox=np.zeros([0, 4]),
box3d_camera=np.zeros([0, 7]),
scores=np.zeros([0]),
label_preds=np.zeros([0, 4]),
sample_idx=sample_idx)
rect = info['calib']['R0_rect'].astype(np.float32)
Trv2c = info['calib']['Tr_velo_to_cam'].astype(np.float32)
P2 = info['calib']['P2'].astype(np.float32)
img_shape = info['image']['image_shape']
P2 = box_preds.tensor.new_tensor(P2)
box_preds_camera = box_preds
box_preds_lidar = box_preds.convert_to(Box3DMode.LIDAR,
np.linalg.inv(rect @ Trv2c))
box_corners = box_preds_camera.corners
box_corners_in_image = points_cam2img(box_corners, P2)
# box_corners_in_image: [N, 8, 2]
minxy = torch.min(box_corners_in_image, dim=1)[0]
maxxy = torch.max(box_corners_in_image, dim=1)[0]
box_2d_preds = torch.cat([minxy, maxxy], dim=1)
# Post-processing
# check box_preds_camera
image_shape = box_preds.tensor.new_tensor(img_shape)
valid_cam_inds = ((box_2d_preds[:, 0] < image_shape[1]) &
(box_2d_preds[:, 1] < image_shape[0]) &
(box_2d_preds[:, 2] > 0) & (box_2d_preds[:, 3] > 0))
# check box_preds
valid_inds = valid_cam_inds
if valid_inds.sum() > 0:
return dict(
bbox=box_2d_preds[valid_inds, :].numpy(),
box3d_camera=box_preds_camera[valid_inds].tensor.numpy(),
box3d_lidar=box_preds_lidar[valid_inds].tensor.numpy(),
scores=scores[valid_inds].numpy(),
label_preds=labels[valid_inds].numpy(),
sample_idx=sample_idx)
else:
return dict(
bbox=np.zeros([0, 4]),
box3d_camera=np.zeros([0, 7]),
box3d_lidar=np.zeros([0, 7]),
scores=np.zeros([0]),
label_preds=np.zeros([0, 4]),
sample_idx=sample_idx)