nuim_instance.py

# Copyright (c) OpenMMLab. All rights reserved.
from mmcv.transforms.loading import LoadAnnotations, LoadImageFromFile
from mmcv.transforms.processing import MultiScaleFlipAug, RandomFlip, Resize

dataset_type = 'CocoDataset'
data_root = 'data/nuimages/'
class_names = [
    'car', 'truck', 'trailer', 'bus', 'construction_vehicle', 'bicycle',
    'motorcycle', 'pedestrian', 'traffic_cone', 'barrier'
]

# Example to use different file client
# Method 1: simply set the data root and let the file I/O module
# automatically infer from prefix (not support LMDB and Memcache yet)

# data_root = 's3://openmmlab/datasets/detection3d/nuimages/'

# Method 2: Use backend_args, file_client_args in versions before 1.1.0
# backend_args = dict(
#     backend='petrel',
#     path_mapping=dict({
#         './data/': 's3://openmmlab/datasets/detection3d/',
#          'data/': 's3://openmmlab/datasets/detection3d/'
#      }))
backend_args = None

train_pipeline = [
    dict(type=LoadImageFromFile, backend_args=backend_args),
    dict(type=LoadAnnotations, with_bbox=True, with_mask=True),
    dict(
        type=Resize,
        img_scale=[(1280, 720), (1920, 1080)],
        multiscale_mode='range',
        keep_ratio=True),
    dict(type=RandomFlip, flip_ratio=0.5),
    dict(type='PackDetInputs'),
]
test_pipeline = [
    dict(type=LoadImageFromFile, backend_args=backend_args),
    dict(
        type=MultiScaleFlipAug,
        img_scale=(1600, 900),
        flip=False,
        transforms=[
            dict(type=Resize, keep_ratio=True),
            dict(type=RandomFlip),
        ]),
    dict(
        type='PackDetInputs',
        meta_keys=('img_id', 'img_path', 'ori_shape', 'img_shape',
                   'scale_factor')),
]
data = dict(
    samples_per_gpu=2,
    workers_per_gpu=2,
    train=dict(
        type=dataset_type,
        ann_file=data_root + 'annotations/nuimages_v1.0-train.json',
        img_prefix=data_root,
        classes=class_names,
        pipeline=train_pipeline),
    val=dict(
        type=dataset_type,
        ann_file=data_root + 'annotations/nuimages_v1.0-val.json',
        img_prefix=data_root,
        classes=class_names,
        pipeline=test_pipeline),
    test=dict(
        type=dataset_type,
        ann_file=data_root + 'annotations/nuimages_v1.0-val.json',
        img_prefix=data_root,
        classes=class_names,
        pipeline=test_pipeline))
evaluation = dict(metric=['bbox', 'segm'])