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pytorch-image-models/inference.py

127 lines
4.9 KiB

#!/usr/bin/env python
"""PyTorch Inference Script
An example inference script that outputs top-k class ids for images in a folder into a csv.
Hacked together by Ross Wightman (https://github.com/rwightman)
"""
import os
import time
import argparse
import logging
import numpy as np
import torch
from timm.models import create_model, apply_test_time_pool
from timm.data import Dataset, create_loader, resolve_data_config
from timm.utils import AverageMeter, setup_default_logging
torch.backends.cudnn.benchmark = True
logger = logging.getLogger(__name__)
parser = argparse.ArgumentParser(description='PyTorch ImageNet Inference')
parser.add_argument('data', metavar='DIR',
help='path to dataset')
parser.add_argument('--output_dir', metavar='DIR', default='./',
help='path to output files')
parser.add_argument('--model', '-m', metavar='MODEL', default='dpn92',
help='model architecture (default: dpn92)')
parser.add_argument('-j', '--workers', default=2, type=int, metavar='N',
help='number of data loading workers (default: 2)')
parser.add_argument('-b', '--batch-size', default=256, type=int,
metavar='N', help='mini-batch size (default: 256)')
parser.add_argument('--img-size', default=None, type=int,
metavar='N', help='Input image dimension')
parser.add_argument('--mean', type=float, nargs='+', default=None, metavar='MEAN',
help='Override mean pixel value of dataset')
parser.add_argument('--std', type=float, nargs='+', default=None, metavar='STD',
help='Override std deviation of of dataset')
parser.add_argument('--interpolation', default='', type=str, metavar='NAME',
help='Image resize interpolation type (overrides model)')
parser.add_argument('--num-classes', type=int, default=1000,
help='Number classes in dataset')
parser.add_argument('--log-freq', default=10, type=int,
metavar='N', help='batch logging frequency (default: 10)')
parser.add_argument('--checkpoint', default='', type=str, metavar='PATH',
help='path to latest checkpoint (default: none)')
parser.add_argument('--pretrained', dest='pretrained', action='store_true',
help='use pre-trained model')
parser.add_argument('--num-gpu', type=int, default=1,
help='Number of GPUS to use')
parser.add_argument('--no-test-pool', dest='no_test_pool', action='store_true',
help='disable test time pool')
parser.add_argument('--topk', default=5, type=int,
metavar='N', help='Top-k to output to CSV')
def main():
setup_default_logging()
args = parser.parse_args()
# might as well try to do something useful...
args.pretrained = args.pretrained or not args.checkpoint
# create model
model = create_model(
args.model,
num_classes=args.num_classes,
in_chans=3,
pretrained=args.pretrained,
checkpoint_path=args.checkpoint)
logger.info('Model %s created, param count: %d' %
(args.model, sum([m.numel() for m in model.parameters()])))
config = resolve_data_config(vars(args), model=model)
model, test_time_pool = apply_test_time_pool(model, config, args)
if args.num_gpu > 1:
model = torch.nn.DataParallel(model, device_ids=list(range(args.num_gpu))).cuda()
else:
model = model.cuda()
loader = create_loader(
Dataset(args.data),
input_size=config['input_size'],
batch_size=args.batch_size,
use_prefetcher=True,
interpolation=config['interpolation'],
mean=config['mean'],
std=config['std'],
num_workers=args.workers,
crop_pct=1.0 if test_time_pool else config['crop_pct'])
model.eval()
k = min(args.topk, args.num_classes)
batch_time = AverageMeter()
end = time.time()
topk_ids = []
with torch.no_grad():
for batch_idx, (input, _) in enumerate(loader):
input = input.cuda()
labels = model(input)
topk = labels.topk(k)[1]
topk_ids.append(topk.cpu().numpy())
# measure elapsed time
batch_time.update(time.time() - end)
end = time.time()
if batch_idx % args.log_freq == 0:
logger.info('Predict: [{0}/{1}] Time {batch_time.val:.3f} ({batch_time.avg:.3f})'.format(
batch_idx, len(loader), batch_time=batch_time))
topk_ids = np.concatenate(topk_ids, axis=0).squeeze()
with open(os.path.join(args.output_dir, './topk_ids.csv'), 'w') as out_file:
filenames = loader.dataset.filenames()
for filename, label in zip(filenames, topk_ids):
filename = os.path.basename(filename)
out_file.write('{0},{1},{2},{3},{4},{5}\n'.format(
filename, label[0], label[1], label[2], label[3], label[4]))
if __name__ == '__main__':
main()