SparseMask: Differentiable Connectivity Learning for Dense Image Prediction

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Official implementation of SparseMask: Differentiable Connectivity Learning for Dense Image Prediction. Automatically design the connectivity structure for dense image prediction tasks, achieving better fusion of multi-scale feature maps.

@inproceedings{wu2019sparsemask,
  title     = {SparseMask: Differentiable Connectivity Learning for Dense Image Prediction},
  author    = {Wu, Huikai and Zhang, Junge and Huang, Kaiqi},
  booktitle = {arXiv preprint arXiv:1904.07642},
  year = {2019}
}

Contact: Hui-Kai Wu (huikaiwu@icloud.com)

Overview

Method

Automatically Designed Architecture

Requirements

python==3.5
pytorch==1.0
cuda==9.0
scipy
scikit-image
tqdm
tensorboardX
tensorflow

Prepare Dataset: PASCAL-VOC 2012

1. Download and unzip PASCAL VOC 2012 and SBD.

    ROOT
    ├── benchmark_RELEASE
    └── VOCdevkit
   

2. Convert *.mat to *.png for SBD.

    python VOC12/convert_mat_to_png.py --sbd_path [ROOT]/benchmark_RELEASE
   

3. Convert labels for PASCAL VOC 2012.

    python VOC12/convert_labels.py \
                [ROOT]/VOCdevkit/VOC2012/SegmentationClass \
                [ROOT]/VOCdevkit/VOC2012/ImageSets/Segmentation/trainval.txt \
                [ROOT]/VOCdevkit/VOC2012/SegmentationClass_1D
   

4. Combine PASCAL VOC 2012 and SBD.

    cd [ROOT]
    mv VOCdevkit/VOC2012/SegmentationClass_1D/*.png benchmark_RELEASE/dataset/cls_png/
    mv VOCdevkit/VOC2012/JPEGImages/*.jpg benchmark_RELEASE/dataset/img/
   

5. Soft link.

     ln -s [ROOT]/benchmark_RELEASE/dataset/cls_png data/gt
     ln -s [ROOT]/benchmark_RELEASE/dataset/img data/img
   

Step by Step

Search

 python train_sparse_mask.py --search

Prune

python prune.py --checkpoint search_checkpoint/checkpoint_33100.pth.tar

Train

python train_sparse_mask.py --mask_path search_checkpoint/mask_thres_0.001.npy
python train_sparse_mask.py --mask_path search_checkpoint/mask_thres_0.001.npy --training_list VOC12/data/train.txt --lr 0.0005 --ft_model [MODEL_PATH]

Eval

python eval_sparse_mask.py --pretrained_model train_checkpoint/checkpoint_4600.pth.tar --mask_path search_checkpoint/mask_thres_0.001.npy

Acknowlegement

Part of the work was conducted while I was an intern in Preferred Networks.