Masked Autoencoders: A PyTorch Implementation

This is a PyTorch/GPU re-implementation of the paper Masked Autoencoders Are Scalable Vision Learners:

@Article{MaskedAutoencoders2021,
  author  = {Kaiming He and Xinlei Chen and Saining Xie and Yanghao Li and Piotr Doll{\'a}r and Ross Girshick},
  journal = {arXiv:2111.06377},
  title   = {Masked Autoencoders Are Scalable Vision Learners},
  year    = {2021},
}

• The original implementation was in TensorFlow+TPU. This re-implementation is in PyTorch+GPU.

• This repo is a modification on the DeiT repo. Installation and preparation follow that repo.

• This repo is based on timm==0.3.2, for which a fix is needed to work with PyTorch 1.8.1+.

Catalog

• Visualization demo
• Pre-trained checkpoints + fine-tuning code
• Pre-training code

Visualization demo

Run our interactive visualization demo using Colab notebook (no GPU needed):

Fine-tuning with pre-trained checkpoints

The following table provides the pre-trained checkpoints used in the paper, converted from TF/TPU to PT/GPU:

	ViT-Base	ViT-Large	ViT-Huge
pre-trained checkpoint	download	download	download
md5	8cad7c	b8b06e	9bdbb0

The fine-tuning instruction is in FINETUNE.md.

By fine-tuning these pre-trained models, we rank #1 in these classification tasks (detailed in the paper):

	ViT-B	ViT-L	ViT-H	ViT-H448	prev best
ImageNet-1K (no external data)	83.6	85.9	86.9	87.8	87.1
following are evaluation of the same model weights (fine-tuned in original ImageNet-1K):
ImageNet-Corruption (error rate)	51.7	41.8	33.8	36.8	42.5
ImageNet-Adversarial	35.9	57.1	68.2	76.7	35.8
ImageNet-Rendition	48.3	59.9	64.4	66.5	48.7
ImageNet-Sketch	34.5	45.3	49.6	50.9	36.0
following are transfer learning by fine-tuning the pre-trained MAE on the target dataset:
iNaturalists 2017	70.5	75.7	79.3	83.4	75.4
iNaturalists 2018	75.4	80.1	83.0	86.8	81.2
iNaturalists 2019	80.5	83.4	85.7	88.3	84.1
Places205	63.9	65.8	65.9	66.8	66.0
Places365	57.9	59.4	59.8	60.3	58.0

Pre-training

The pre-training instruction is in PRETRAIN.md.

License

This project is under the CC-BY-NC 4.0 license. See LICENSE for details.