Compact Generalized Non-local Network

By Kaiyu Yue, Ming Sun, Yuchen Yuan, Feng Zhou, Errui Ding and Fuxin Xu

Introduction

This is a PyTorch re-implementation for the paper Compact Generalized Non-local Network. It brings the CGNL models trained on the CUB-200, ImageNet and COCO based on maskrcnn-benchmark from FAIR.

Update

• 05/2019: Support CGNL & NL Module in Caffe - see caffe/README.md

Citation

If you think this code is useful in your research or wish to refer to the baseline results published in our paper, please use the following BibTeX entry.

@article{CGNLNetwork2018,
    author={Kaiyu Yue and Ming Sun and Yuchen Yuan and Feng Zhou and Errui Ding and Fuxin Xu},
    title={Compact Generalized Non-local Network},
    journal={NIPS},
    year={2018}
}

Requirements

• PyTorch >= 0.4.1 or 1.0 from a nightly release
• Python >= 3.5
• torchvision >= 0.2.1
• termcolor >= 1.1.0

Environment

The code is developed and tested under 8 Tesla P40 / V100-SXM2-16GB GPUS cards on CentOS with installed CUDA-9.2/8.0 and cuDNN-7.1.

Baselines and Main Results on CUB-200 Dataset

Notes:

• The input size is 448.
• The CGNL block with dot production kernel is configured within 8 groups.

Notes:

• The input size is 448.
• The CGNLx block with Gaussian RBF [0][1] kernel is configured within 8 groups.
• The Taylor Expansion order for the kernel function is 3.

Experiments on ImageNet Dataset

Notes:

• The input size is 224.
• The CGNL and CGNLx blocks are configured as same as above experiments on CUB-200.

Experiments on COCO based on Mask R-CNN in PyTorch 1.0

Notes:

• The CGNL model is simply trained using the same experimental strategy as in maskrcnn-benchmark. It is configured as same as above experiments on CUB-200.
• If you want to add the CGNL / CGNLx / NL blocks to the backbone of Mask-RCNN models, you can use the maskrcnn-benchmark/modeling/backbone/resnet.py and maskrcnn-benchmark/utils/c2_model_loading.py to replace the original py-files. Please refer to the code for specific configurations.
• Prolonging the WARMUP_ITERS appropriately would produce the better results for CGNL models. The long training schedule is also recommended, like 2x or 1.44x in Detectron.
• Due to some reasons of the Linux virtual environment or the data I/O speed, the numbers of train time, total train time and inference time in above table are both larger than the benchmarks. But this does not affect the demonstration of the efficiency of CGNL block.

Getting Start

Prepare Dataset

• Download pytorch imagenet pretrained models from pytorch model zoo. The optional download links can be found in torchvision. Put them in the pretrained folder.

• Download the training and validation lists for CUB-200 dataset from Google Drive or Baidu Pan. Download the ImageNet dataset and move validation images to labeled subfolders following the tutorial. The training and validation lists can be found in Google Drive or Baidu Pan. Put them in the data folder and make them look like:

  ${THIS REPO ROOT}
   `-- pretrained
       |-- resnet50-19c8e357.pth
       |-- resnet101-5d3b4d8f.pth
       |-- resnet152-b121ed2d.pth
   `-- data
       `-- cub
           `-- images
           |   |-- 001.Black_footed_Albatross
           |   |-- 002.Laysan_Albatross
           |   |-- ...
           |   |-- 200.Common_Yellowthroat
           |-- cub_train.list
           |-- cub_val.list
           |-- images.txt
           |-- image_class_labels.txt
           |-- README
       `-- imagenet
           `-- img_train
           |   |-- n01440764
           |   |-- n01734418
           |   |-- ...
           |   |-- n15075141
           `-- img_val
           |   |-- n01440764
           |   |-- n01734418
           |   |-- ...
           |   |-- n15075141
           |-- imagenet_train.list
           |-- imagenet_val.list

Perform Validating

$ python train_val.py --arch '50' --dataset 'cub' --nl-type 'cgnl' --nl-num 1 --checkpoints ${FOLDER_DIR} --valid

Perform Training Baselines

$ python train_val.py --arch '50' --dataset 'cub' --nl-num 0

Perform Training NL and CGNL Networks

$ python train_val.py --arch '50' --dataset 'cub' --nl-type 'cgnl' --nl-num 1 --warmup

Reference

• [0] Y. Cui et al, Kernel Pooling for Convolutional Neural Networks, CVPR 2017.
• [1] T. Poggio et al, Networks for Approximation and Learning, Proceedings of the IEEE 1990.

License

This code is released under the MIT License. See LICENSE for additional details.