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pymetric

pymetric tries to build a metric learning and retrieval codebase based on PyTorch. It refers from pycls On Network Design Spaces for Visual Recognition project and fast-reid from (https://github.com/JDAI-CV/fast-reid).

Introduction

Installation

Requirements:

  • NVIDIA GPU, Linux, Python3(tested on 3.6.10)
  • PyTorch, various Python packages; Instructions for installing these dependencies are found below

Notes:

  • pymetric does not currently support running on CPU; a GPU system is required
  • pymetric has been tested with CUDA 10.2 and cuDNN 7.1

PyTorch

To install PyTorch with CUDA support, follow the installation instructions from the PyTorch website.

pymetric

Clone the pymetric repository:

# PYMETRIC=/path/to/clone/pymetric
git clone https://github.com/feymanpriv/pymetric $PYMETRIC

Install Python dependencies:

pip install -r $PYMETRIC/requirements.txt

Set PYTHONPATH:

cd $PYMETRIC && export PYTHONPATH=`pwd`:$PYTHONPATH

Datasets

Same with pycls, pymetric finds datasets via symlinks from metric/datasets/data to the actual locations where the dataset images and annotations are stored. Refer to DATA.md.

Getting Started

Training a metric model:

python tools/train_metric.py \
    --cfg configs/metric/R-50-1x64d_step_8gpu.yaml \
    OUT_DIR ./output \
    PORT 12001 \
    TRAIN.WEIGHTS path/to/pretrainedmodel

Resume training:

python tools/train_metric.py \
    --cfg configs/metric/R-50-1x64d_step_8gpu.yaml \
    OUT_DIR ./output \
    PORT 12001 \
    TRAIN.AUTO_RESUME True

Extracting features(labels) and evaluation

set ${total_num} = n*(gpu_cards)
sh tools/metric/eval/infer.sh
python search.py search_gpu ${queryfea_path}, ${referfea_path}, ${output}

Convert to tensorflow2.3 (please refer onnx and onnx-tensorflow)
examples: tools/convert/torch2onnx.py tools/convert/onnx2tf.py

Pretrained weights

-resnet50 (c3l3)

-resnet101 (t3ln)

-resnest269 (3c5a)

Results

2nd place on Google Landmark Retrieval Challenge 2020

Backbone Scale Margin Size Public Score Private Score
ResNeSt269 30 0.15 224/224 0.35129 0.30819
ResNeSt269 30 0.15 448/448 0.36972 0.33015
ResNeSt269 30 0.15 640/448 0.39040 0.34718

License

pymetric is released under the MIT license. Please see the LICENSE file for more information.