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train_usl_no_outlier.py
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train_usl_no_outlier.py
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from __future__ import print_function, absolute_import
import argparse
import os.path as osp
import random
import numpy as np
import sys
import time
from datetime import timedelta
from sklearn.cluster import DBSCAN
import torch
from torch import nn
from torch.backends import cudnn
import torch.nn.functional as F
from reid import models
from reid.models.em import Memory
from reid.trainers import Noisy_USL
from reid.evaluators import Evaluator, extract_features
from reid.utils.logging import Logger
from reid.utils.serialization import load_checkpoint, save_checkpoint
from reid.utils.faiss_rerank import compute_jaccard_distance
from reid.utils.tools import get_test_loader, get_train_loader
from reid import datasets
start_epoch = best_mAP = 0
def get_data(name, data_dir):
root = osp.join(data_dir, name)
dataset = datasets.create(name, root)
return dataset
def create_model(args):
model = models.create(args.arch, num_features=args.features, norm=True, dropout=args.dropout, num_classes=0)
# use CUDA
model = model.cuda()
if args.resume:
checkpoint = load_checkpoint(args.resume)
model.copy_weight(checkpoint['state_dict'])
model = nn.DataParallel(model)
return model
def main():
args = parser.parse_args()
if args.seed is not None:
random.seed(args.seed)
np.random.seed(args.seed)
torch.manual_seed(args.seed)
cudnn.deterministic = True
main_worker(args)
def main_worker(args):
global start_epoch, best_mAP
start_time = time.monotonic()
cudnn.benchmark = True
sys.stdout = Logger(osp.join(args.logs_dir, 'log.txt'))
print("==========\nArgs:{}\n==========".format(args))
# Create datasets
iters = args.iters if (args.iters > 0) else None
print("==> Load unlabeled dataset")
dataset = get_data(args.dataset, args.data_dir)
test_loader = get_test_loader(dataset, args.height, args.width, args.batch_size, args.workers)
# Create model
model = create_model(args)
# Evaluator
evaluator = Evaluator(model)
if args.evaluate:
evaluator.evaluate(test_loader, dataset.query, dataset.gallery, cmc_flag=True)
return
# Initialize target-domain instance features
print("==> Initialize instance features in the feature memory")
cluster_loader = get_test_loader(dataset, args.height, args.width,
args.batch_size, args.workers, testset=sorted(dataset.train))
features, _ = extract_features(model, cluster_loader, print_freq=50)
features = torch.cat([features[f].unsqueeze(0) for f, _, _ in sorted(dataset.train)], 0)
# Create memory
memory = nn.DataParallel(
Memory(2048, len(dataset.train),
temp=args.temp, momentum=args.momentum)
).cuda()
memory.module.features = F.normalize(features, dim=1).cuda()
del cluster_loader
# optimizer for meta models
params = [{"params": [value]} for value in model.module.params() if value.requires_grad]
optimizer = torch.optim.Adam(params, lr=args.lr, weight_decay=args.weight_decay)
lr_scheduler = torch.optim.lr_scheduler.StepLR(optimizer, step_size=args.step_size, gamma=0.1)
# Trainer
trainer = Noisy_USL(model, memory)
cluster = DBSCAN(eps=args.eps, min_samples=4, metric='precomputed', n_jobs=-1)
# instance pre-training
pseudo_labeled_dataset = []
pseudo_labels = torch.arange(len(dataset.train))
for i, ((fname, _, cid), label) in enumerate(zip(sorted(dataset.train), pseudo_labels)):
pseudo_labeled_dataset.append((fname, label.item(), i))
# The same as ECN
for epoch in range(args.startE):
torch.cuda.empty_cache()
memory.module.labels = pseudo_labels.cuda()
train_loader = get_train_loader(dataset.images_dir, args.height, args.width,
args.batch_size, args.workers, -1, iters,
trainset=pseudo_labeled_dataset)
print(f'-----Examplar Pretraining, Epoch{epoch}...------')
trainer.train(epoch, train_loader, optimizer,
print_freq=args.print_freq, train_iters=args.iters)
# test pre-train
evaluator.evaluate(test_loader, dataset.query, dataset.gallery, cmc_flag=False)
# start training
for epoch in range(args.epochs):
# Calculate distance
torch.cuda.empty_cache()
features = memory.module.features.clone()
rerank_dist = compute_jaccard_distance(features, k1=args.k1, k2=args.k2)
# select & cluster images as training set of this epochs
pseudo_labels = cluster.fit_predict(rerank_dist)
pseudo_labeled_dataset = []
for i, ((fname, _, cid), label) in enumerate(zip(sorted(dataset.train), pseudo_labels)):
# ignore -1 samples
if label.item() != -1:
# take camera to represent index
pseudo_labeled_dataset.append((fname, label.item(), i))
# statistics of clusters and un-clustered instances
memory.module.labels = torch.from_numpy(pseudo_labels).cuda()
train_loader = get_train_loader(dataset.images_dir, args.height, args.width,
args.batch_size, args.workers, args.num_instances, iters,
trainset=pseudo_labeled_dataset)
trainer.train(epoch, train_loader, optimizer,
print_freq=args.print_freq, train_iters=args.iters)
if (epoch + 1) % args.eval_step == 0 or (epoch == args.epochs - 1):
mAP = evaluator.evaluate(test_loader, dataset.query, dataset.gallery, cmc_flag=False)
is_best = (mAP > best_mAP)
best_mAP = max(mAP, best_mAP)
save_checkpoint({
'state_dict': model.state_dict(),
'epoch': epoch + 1,
'best_mAP': best_mAP,
}, is_best, fpath=osp.join(args.logs_dir, 'checkpoint.pth.tar'))
print('\n * Finished epoch {:3d} model mAP: {:5.1%} best: {:5.1%}{}\n'.
format(epoch, mAP, best_mAP, ' *' if is_best else ''))
lr_scheduler.step()
print('==> Test with the best model:')
checkpoint = load_checkpoint(osp.join(args.logs_dir, 'model_best.pth.tar'))
model.load_state_dict(checkpoint['state_dict'])
evaluator.evaluate(test_loader, dataset.query, dataset.gallery, cmc_flag=True)
end_time = time.monotonic()
print('Total running time: ', timedelta(seconds=end_time - start_time))
if __name__ == '__main__':
parser = argparse.ArgumentParser(description="MetaCam without outliers")
# data
parser.add_argument('-d', '--dataset', type=str, default='market1501',
choices=datasets.names())
parser.add_argument('-b', '--batch-size', type=int, default=64)
parser.add_argument('-j', '--workers', type=int, default=4)
parser.add_argument('--height', type=int, default=256, help="input height")
parser.add_argument('--width', type=int, default=128, help="input width")
parser.add_argument('--num-instances', type=int, default=4,
help="each minibatch consist of "
"(batch_size // num_instances) identities, and "
"each identity has num_instances instances, "
"default: 0 (NOT USE)")
# cluster
parser.add_argument('--eps', type=float, default=0.6,
help="max neighbor distance for DBSCAN")
parser.add_argument('--eps-gap', type=float, default=0.02,
help="multi-scale criterion for measuring cluster reliability")
parser.add_argument('--k1', type=int, default=30,
help="hyperparameter for jaccard distance")
parser.add_argument('--k2', type=int, default=6,
help="hyperparameter for jaccard distance")
# model
parser.add_argument('-a', '--arch', type=str, default='resMeta',
choices=models.names())
parser.add_argument('--features', type=int, default=0)
parser.add_argument('--dropout', type=float, default=0)
parser.add_argument('--momentum', type=float, default=0.2,
help="update momentum for the feature memory")
# optimizer
parser.add_argument('--lr', type=float, default=0.00035,
help="learning rate")
parser.add_argument('--startE', type=int, default=5)
parser.add_argument('--weight-decay', type=float, default=5e-4)
parser.add_argument('--epochs', type=int, default=40)
parser.add_argument('--iters', type=int, default=200)
parser.add_argument('--step-size', type=int, default=20)
# training configs
parser.add_argument('--seed', type=int, default=1)
parser.add_argument('--print-freq', type=int, default=10)
parser.add_argument('--eval-step', type=int, default=10)
parser.add_argument('--temp', type=float, default=0.05,
help="temperature for scaling contrastive loss")
# path
working_dir = osp.dirname(osp.abspath(__file__))
parser.add_argument('--data-dir', type=str, metavar='PATH',
default=osp.join(working_dir, 'data'))
parser.add_argument('--logs-dir', type=str, metavar='PATH',
default=osp.join(working_dir, 'logs'))
parser.add_argument('--resume', type=str, default='')
parser.add_argument('--evaluate', action='store_true',
help="evaluation only")
main()