Re-implememtation of MAE (Masked Autoencoders Are Scalable Vision Learners) using PyTorch.

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Deep Learningmae-repo
Overview

mae-repo

PyTorch re-implememtation of "masked autoencoders are scalable vision learners". In this repo, it heavily borrows codes from codebase https://github.com/lucidrains/vit-pytorch (for MAE architectures) and https://github.com/pengzhiliang/MAE-pytorch (for training loop).

prepare ImageNet1K datasets

To train MAE, one should prepare ImageNet_ILSVRC2012 and place ILSVRC2012_*.tar in the ${datasets_path}. To shorten the overhead of first run, one can manually untar the tarfile into train and val directories, as follow (refered to https://gist.github.com/BIGBALLON/8a71d225eff18d88e469e6ea9b39cef4).

mkdir train && mv ILSVRC2012_img_train.tar train/ && cd train
tar -xvf ILSVRC2012_img_train.tar && rm -f ILSVRC2012_img_train.tar
find . -name "*.tar" | while read NAME ; do mkdir -p "${NAME%.tar}"; tar -xvf "${NAME}" -C "${NAME%.tar}"; rm -f "${NAME}"; done
cd ..
mkdir val && mv ILSVRC2012_img_val.tar val/ && cd val && tar -xvf ILSVRC2012_img_val.tar
wget -qO- https://raw.githubusercontent.com/soumith/imagenetloader.torch/master/valprep.sh | bash

modify configuration file

To separate code and config, we try to split configurations to yaml file, located in configs directory, such as imagenet1k-vit-base.yml. One can modify 'model' setting following MAE and ViT to configure model architecture parameters of ViT-base, large and huge.

One can modify 'optim' for optimizer settings. And modify 'training' and 'data' for training settings. Note that, modify 'training:batch_size' to fit the GPU memory of one GPU card. Total batch_size is equal to batch_size multiplied by number of GPU cards.

train

CUDA_VISIBLE_DEVICES=0,1,2,3,5,6,7 OMP_NUM_THREADS=1 python -m torch.distributed.launch --nproc_per_node=8 mae_test.py
--datasets_path ${datasets_path}
--config imagenet1k-vit-base.yml
--doc mae-vit-base16-dec8-512

ToDo lists

  • add pretrain mode
  • add fine-tunning mode
  • support mixed precision training
  • support distributed training
  • verify the correctness of this re-implementation
Owner
Peng Qiao
Peng Qiao
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