def __init__(self, size: int):
"""
Args:
size (int): the total number of data of the underlying dataset to sample from
"""
self._size = size
assert size > 0
self._rank = comm.get_rank()
self._world_size = comm.get_world_size()
shard_size = (self._size - 1) // self._world_size + 1
begin = shard_size * self._rank
end = min(shard_size * (self._rank + 1), self._size)
self._local_indices = range(begin, end)
def default_setup(cfg, args):
"""
Perform some basic common setups at the beginning of a job, including:
1. Set up the detectron2 logger
2. Log basic information about environment, cmdline arguments, and config
3. Backup the config to the output directory
Args:
cfg (CfgNode): the full config to be used
args (argparse.NameSpace): the command line arguments to be logged
"""
output_dir = cfg.OUTPUT_DIR
if comm.is_main_process() and output_dir:
PathManager.mkdirs(output_dir)
rank = comm.get_rank()
setup_logger(output_dir, distributed_rank=rank, name="fvcore")
logger = setup_logger(output_dir, distributed_rank=rank)
logger.info("Rank of current process: {}. World size: {}".format(rank, comm.get_world_size()))
logger.info("Environment info:\n" + collect_env_info())
logger.info("Command line arguments: " + str(args))
if hasattr(args, "config_file"):
logger.info(
"Contents of args.config_file={}:\n{}".format(
args.config_file, PathManager.open(args.config_file, "r").read()
)
)
logger.info("Running with full config:\n{}".format(cfg))
if comm.is_main_process() and output_dir:
# Note: some of our scripts may expect the existence of
# config.yaml in output directory
path = os.path.join(output_dir, "config.yaml")
with PathManager.open(path, "w") as f:
f.write(cfg.dump())
logger.info("Full config saved to {}".format(os.path.abspath(path)))
# make sure each worker has a different, yet deterministic seed if specified
seed_all_rng(None if cfg.SEED < 0 else cfg.SEED + rank)
# cudnn benchmark has large overhead. It shouldn't be used considering the small size of
# typical validation set.
if not (hasattr(args, "eval_only") and args.eval_only):
torch.backends.cudnn.benchmark = cfg.CUDNN_BENCHMARK
def evaluate(self):
"""
Returns:
dict: has a key "segm", whose value is a dict of "AP" and "AP50".
"""
comm.synchronize()
if comm.get_rank() > 0:
return
os.environ["CITYSCAPES_DATASET"] = os.path.abspath(
os.path.join(self._metadata.gt_dir, "..", ".."))
# Load the Cityscapes eval script *after* setting the required env var,
# since the script reads CITYSCAPES_DATASET into global variables at load time.
import cityscapesscripts.evaluation.evalInstanceLevelSemanticLabeling as cityscapes_eval
self._logger.info("Evaluating results under {} ...".format(
self._temp_dir))
# set some global states in cityscapes evaluation API, before evaluating
cityscapes_eval.args.predictionPath = os.path.abspath(self._temp_dir)
cityscapes_eval.args.predictionWalk = None
cityscapes_eval.args.JSONOutput = False
cityscapes_eval.args.colorized = False
cityscapes_eval.args.gtInstancesFile = os.path.join(
self._temp_dir, "gtInstances.json")
# These lines are adopted from
# https://github.com/mcordts/cityscapesScripts/blob/master/cityscapesscripts/evaluation/evalInstanceLevelSemanticLabeling.py # noqa
groundTruthImgList = glob.glob(cityscapes_eval.args.groundTruthSearch)
assert len(
groundTruthImgList
), "Cannot find any ground truth images to use for evaluation. Searched for: {}".format(
cityscapes_eval.args.groundTruthSearch)
predictionImgList = []
for gt in groundTruthImgList:
predictionImgList.append(
cityscapes_eval.getPrediction(gt, cityscapes_eval.args))
results = cityscapes_eval.evaluateImgLists(
predictionImgList, groundTruthImgList,
cityscapes_eval.args)["averages"]
ret = OrderedDict()
ret["segm"] = {
"AP": results["allAp"] * 100,
"AP50": results["allAp50%"] * 100
}
self._working_dir.cleanup()
return ret
def __init__(self,
size: int,
shuffle: bool = True,
seed: Optional[int] = None):
"""
Args:
size (int): the total number of data of the underlying dataset to sample from
shuffle (bool): whether to shuffle the indices or not
seed (int): the initial seed of the shuffle. Must be the same
across all workers. If None, will use a random seed shared
among workers (require synchronization among all workers).
"""
self._size = size
assert size > 0
self._shuffle = shuffle
if seed is None:
seed = comm.shared_random_seed()
self._seed = int(seed)
self._rank = comm.get_rank()
self._world_size = comm.get_world_size()
def __init__(self, dataset_dicts, repeat_thresh, shuffle=True, seed=None):
"""
Args:
dataset_dicts (list[dict]): annotations in Detectron2 dataset format.
repeat_thresh (float): frequency threshold below which data is repeated.
shuffle (bool): whether to shuffle the indices or not
seed (int): the initial seed of the shuffle. Must be the same
across all workers. If None, will use a random seed shared
among workers (require synchronization among all workers).
"""
self._shuffle = shuffle
if seed is None:
seed = comm.shared_random_seed()
self._seed = int(seed)
self._rank = comm.get_rank()
self._world_size = comm.get_world_size()
# Get fractional repeat factors and split into whole number (_int_part)
# and fractional (_frac_part) parts.
rep_factors = self._get_repeat_factors(dataset_dicts, repeat_thresh)
self._int_part = torch.trunc(rep_factors)
self._frac_part = rep_factors - self._int_part