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| # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved | |
| """ | |
| MaskFormer Training Script. | |
| This script is a simplified version of the training script in detectron2/tools. | |
| """ | |
| import copy | |
| import itertools | |
| import logging | |
| import os | |
| from collections import OrderedDict | |
| from typing import Any, Dict, List, Set | |
| import torch | |
| import detectron2.utils.comm as comm | |
| from detectron2.checkpoint import DetectionCheckpointer | |
| from detectron2.config import get_cfg | |
| from detectron2.data import MetadataCatalog, build_detection_train_loader | |
| from detectron2.engine import DefaultTrainer, default_argument_parser, default_setup, launch | |
| from detectron2.evaluation import CityscapesInstanceEvaluator, CityscapesSemSegEvaluator, \ | |
| COCOEvaluator, COCOPanopticEvaluator, DatasetEvaluators, SemSegEvaluator, verify_results, \ | |
| DatasetEvaluator | |
| from detectron2.projects.deeplab import add_deeplab_config, build_lr_scheduler | |
| from detectron2.solver.build import maybe_add_gradient_clipping | |
| from detectron2.utils.logger import setup_logger | |
| from detectron2.utils.file_io import PathManager | |
| import numpy as np | |
| from PIL import Image | |
| import glob | |
| import pycocotools.mask as mask_util | |
| from detectron2.data import DatasetCatalog, MetadataCatalog | |
| from detectron2.utils.comm import all_gather, is_main_process, synchronize | |
| import json | |
| # from detectron2.evaluation import SemSegGzeroEvaluator | |
| # from mask_former.evaluation.sem_seg_evaluation_gzero import SemSegGzeroEvaluator | |
| class VOCbEvaluator(SemSegEvaluator): | |
| """ | |
| Evaluate semantic segmentation metrics. | |
| """ | |
| def process(self, inputs, outputs): | |
| """ | |
| Args: | |
| inputs: the inputs to a model. | |
| It is a list of dicts. Each dict corresponds to an image and | |
| contains keys like "height", "width", "file_name". | |
| outputs: the outputs of a model. It is either list of semantic segmentation predictions | |
| (Tensor [H, W]) or list of dicts with key "sem_seg" that contains semantic | |
| segmentation prediction in the same format. | |
| """ | |
| for input, output in zip(inputs, outputs): | |
| output = output["sem_seg"].argmax(dim=0).to(self._cpu_device) | |
| pred = np.array(output, dtype=np.int) | |
| pred[pred >= 20] = 20 | |
| with PathManager.open(self.input_file_to_gt_file[input["file_name"]], "rb") as f: | |
| gt = np.array(Image.open(f), dtype=np.int) | |
| gt[gt == self._ignore_label] = self._num_classes | |
| self._conf_matrix += np.bincount( | |
| (self._num_classes + 1) * pred.reshape(-1) + gt.reshape(-1), | |
| minlength=self._conf_matrix.size, | |
| ).reshape(self._conf_matrix.shape) | |
| self._predictions.extend(self.encode_json_sem_seg(pred, input["file_name"])) | |
| # MaskFormer | |
| from cat_seg import ( | |
| DETRPanopticDatasetMapper, | |
| MaskFormerPanopticDatasetMapper, | |
| MaskFormerSemanticDatasetMapper, | |
| SemanticSegmentorWithTTA, | |
| add_cat_seg_config, | |
| ) | |
| class Trainer(DefaultTrainer): | |
| """ | |
| Extension of the Trainer class adapted to DETR. | |
| """ | |
| def build_evaluator(cls, cfg, dataset_name, output_folder=None): | |
| """ | |
| Create evaluator(s) for a given dataset. | |
| This uses the special metadata "evaluator_type" associated with each | |
| builtin dataset. For your own dataset, you can simply create an | |
| evaluator manually in your script and do not have to worry about the | |
| hacky if-else logic here. | |
| """ | |
| if output_folder is None: | |
| output_folder = os.path.join(cfg.OUTPUT_DIR, "inference") | |
| evaluator_list = [] | |
| evaluator_type = MetadataCatalog.get(dataset_name).evaluator_type | |
| if evaluator_type in ["sem_seg", "ade20k_panoptic_seg"]: | |
| evaluator_list.append( | |
| SemSegEvaluator( | |
| dataset_name, | |
| distributed=True, | |
| output_dir=output_folder, | |
| ) | |
| ) | |
| if evaluator_type == "sem_seg_background": | |
| evaluator_list.append( | |
| VOCbEvaluator( | |
| dataset_name, | |
| distributed=True, | |
| output_dir=output_folder, | |
| ) | |
| ) | |
| if evaluator_type == "coco": | |
| evaluator_list.append(COCOEvaluator(dataset_name, output_dir=output_folder)) | |
| if evaluator_type in [ | |
| "coco_panoptic_seg", | |
| "ade20k_panoptic_seg", | |
| "cityscapes_panoptic_seg", | |
| ]: | |
| evaluator_list.append(COCOPanopticEvaluator(dataset_name, output_folder)) | |
| if evaluator_type == "cityscapes_instance": | |
| assert ( | |
| torch.cuda.device_count() >= comm.get_rank() | |
| ), "CityscapesEvaluator currently do not work with multiple machines." | |
| return CityscapesInstanceEvaluator(dataset_name) | |
| if evaluator_type == "cityscapes_sem_seg": | |
| assert ( | |
| torch.cuda.device_count() >= comm.get_rank() | |
| ), "CityscapesEvaluator currently do not work with multiple machines." | |
| return CityscapesSemSegEvaluator(dataset_name) | |
| if evaluator_type == "cityscapes_panoptic_seg": | |
| assert ( | |
| torch.cuda.device_count() >= comm.get_rank() | |
| ), "CityscapesEvaluator currently do not work with multiple machines." | |
| evaluator_list.append(CityscapesSemSegEvaluator(dataset_name)) | |
| if len(evaluator_list) == 0: | |
| raise NotImplementedError( | |
| "no Evaluator for the dataset {} with the type {}".format( | |
| dataset_name, evaluator_type | |
| ) | |
| ) | |
| elif len(evaluator_list) == 1: | |
| return evaluator_list[0] | |
| return DatasetEvaluators(evaluator_list) | |
| def build_train_loader(cls, cfg): | |
| # Semantic segmentation dataset mapper | |
| if cfg.INPUT.DATASET_MAPPER_NAME == "mask_former_semantic": | |
| mapper = MaskFormerSemanticDatasetMapper(cfg, True) | |
| # Panoptic segmentation dataset mapper | |
| elif cfg.INPUT.DATASET_MAPPER_NAME == "mask_former_panoptic": | |
| mapper = MaskFormerPanopticDatasetMapper(cfg, True) | |
| # DETR-style dataset mapper for COCO panoptic segmentation | |
| elif cfg.INPUT.DATASET_MAPPER_NAME == "detr_panoptic": | |
| mapper = DETRPanopticDatasetMapper(cfg, True) | |
| else: | |
| mapper = None | |
| return build_detection_train_loader(cfg, mapper=mapper) | |
| def build_lr_scheduler(cls, cfg, optimizer): | |
| """ | |
| It now calls :func:`detectron2.solver.build_lr_scheduler`. | |
| Overwrite it if you'd like a different scheduler. | |
| """ | |
| return build_lr_scheduler(cfg, optimizer) | |
| def build_optimizer(cls, cfg, model): | |
| weight_decay_norm = cfg.SOLVER.WEIGHT_DECAY_NORM | |
| weight_decay_embed = cfg.SOLVER.WEIGHT_DECAY_EMBED | |
| defaults = {} | |
| defaults["lr"] = cfg.SOLVER.BASE_LR | |
| defaults["weight_decay"] = cfg.SOLVER.WEIGHT_DECAY | |
| norm_module_types = ( | |
| torch.nn.BatchNorm1d, | |
| torch.nn.BatchNorm2d, | |
| torch.nn.BatchNorm3d, | |
| torch.nn.SyncBatchNorm, | |
| # NaiveSyncBatchNorm inherits from BatchNorm2d | |
| torch.nn.GroupNorm, | |
| torch.nn.InstanceNorm1d, | |
| torch.nn.InstanceNorm2d, | |
| torch.nn.InstanceNorm3d, | |
| torch.nn.LayerNorm, | |
| torch.nn.LocalResponseNorm, | |
| ) | |
| params: List[Dict[str, Any]] = [] | |
| memo: Set[torch.nn.parameter.Parameter] = set() | |
| # import ipdb; | |
| # ipdb.set_trace() | |
| for module_name, module in model.named_modules(): | |
| for module_param_name, value in module.named_parameters(recurse=False): | |
| if not value.requires_grad: | |
| continue | |
| # Avoid duplicating parameters | |
| if value in memo: | |
| continue | |
| memo.add(value) | |
| hyperparams = copy.copy(defaults) | |
| if "backbone" in module_name: | |
| hyperparams["lr"] = hyperparams["lr"] * cfg.SOLVER.BACKBONE_MULTIPLIER | |
| if "clip_model" in module_name: | |
| hyperparams["lr"] = hyperparams["lr"] * cfg.SOLVER.CLIP_MULTIPLIER | |
| # for deformable detr | |
| if ( | |
| "relative_position_bias_table" in module_param_name | |
| or "absolute_pos_embed" in module_param_name | |
| ): | |
| print(module_param_name) | |
| hyperparams["weight_decay"] = 0.0 | |
| if isinstance(module, norm_module_types): | |
| hyperparams["weight_decay"] = weight_decay_norm | |
| if isinstance(module, torch.nn.Embedding): | |
| hyperparams["weight_decay"] = weight_decay_embed | |
| params.append({"params": [value], **hyperparams}) | |
| def maybe_add_full_model_gradient_clipping(optim): | |
| # detectron2 doesn't have full model gradient clipping now | |
| clip_norm_val = cfg.SOLVER.CLIP_GRADIENTS.CLIP_VALUE | |
| enable = ( | |
| cfg.SOLVER.CLIP_GRADIENTS.ENABLED | |
| and cfg.SOLVER.CLIP_GRADIENTS.CLIP_TYPE == "full_model" | |
| and clip_norm_val > 0.0 | |
| ) | |
| class FullModelGradientClippingOptimizer(optim): | |
| def step(self, closure=None): | |
| all_params = itertools.chain(*[x["params"] for x in self.param_groups]) | |
| torch.nn.utils.clip_grad_norm_(all_params, clip_norm_val) | |
| super().step(closure=closure) | |
| return FullModelGradientClippingOptimizer if enable else optim | |
| optimizer_type = cfg.SOLVER.OPTIMIZER | |
| if optimizer_type == "SGD": | |
| optimizer = maybe_add_full_model_gradient_clipping(torch.optim.SGD)( | |
| params, cfg.SOLVER.BASE_LR, momentum=cfg.SOLVER.MOMENTUM | |
| ) | |
| elif optimizer_type == "ADAMW": | |
| optimizer = maybe_add_full_model_gradient_clipping(torch.optim.AdamW)( | |
| params, cfg.SOLVER.BASE_LR | |
| ) | |
| else: | |
| raise NotImplementedError(f"no optimizer type {optimizer_type}") | |
| if not cfg.SOLVER.CLIP_GRADIENTS.CLIP_TYPE == "full_model": | |
| optimizer = maybe_add_gradient_clipping(cfg, optimizer) | |
| return optimizer | |
| def test_with_TTA(cls, cfg, model): | |
| logger = logging.getLogger("detectron2.trainer") | |
| # In the end of training, run an evaluation with TTA. | |
| logger.info("Running inference with test-time augmentation ...") | |
| model = SemanticSegmentorWithTTA(cfg, model) | |
| evaluators = [ | |
| cls.build_evaluator( | |
| cfg, name, output_folder=os.path.join(cfg.OUTPUT_DIR, "inference_TTA") | |
| ) | |
| for name in cfg.DATASETS.TEST | |
| ] | |
| res = cls.test(cfg, model, evaluators) | |
| res = OrderedDict({k + "_TTA": v for k, v in res.items()}) | |
| return res | |
| def setup(args): | |
| """ | |
| Create configs and perform basic setups. | |
| """ | |
| cfg = get_cfg() | |
| # for poly lr schedule | |
| add_deeplab_config(cfg) | |
| add_cat_seg_config(cfg) | |
| cfg.merge_from_file(args.config_file) | |
| cfg.merge_from_list(args.opts) | |
| cfg.freeze() | |
| default_setup(cfg, args) | |
| # Setup logger for "mask_former" module | |
| setup_logger(output=cfg.OUTPUT_DIR, distributed_rank=comm.get_rank(), name="mask_former") | |
| return cfg | |
| def main(args): | |
| cfg = setup(args) | |
| torch.set_float32_matmul_precision("high") | |
| if args.eval_only: | |
| model = Trainer.build_model(cfg) | |
| DetectionCheckpointer(model, save_dir=cfg.OUTPUT_DIR).resume_or_load( | |
| cfg.MODEL.WEIGHTS, resume=args.resume | |
| ) | |
| res = Trainer.test(cfg, model) | |
| if cfg.TEST.AUG.ENABLED: | |
| res.update(Trainer.test_with_TTA(cfg, model)) | |
| if comm.is_main_process(): | |
| verify_results(cfg, res) | |
| return res | |
| trainer = Trainer(cfg) | |
| trainer.resume_or_load(resume=args.resume) | |
| return trainer.train() | |
| if __name__ == "__main__": | |
| args = default_argument_parser().parse_args() | |
| print("Command Line Args:", args) | |
| launch( | |
| main, | |
| args.num_gpus, | |
| num_machines=args.num_machines, | |
| machine_rank=args.machine_rank, | |
| dist_url=args.dist_url, | |
| args=(args,), | |
| ) | |