This repo contains the official code and pre-trained models for the Dynamic Vision Transformer (DVT).

Overview

Dynamic-Vision-Transformer (Pytorch)

This repo contains the official code and pre-trained models for the Dynamic Vision Transformer (DVT).

Update on 2021/06/01: Release Pre-trained Models and the Inference Code on ImageNet.

Introduction

We develop a Dynamic Vision Transformer (DVT) to automatically configure a proper number of tokens for each individual image, leading to a significant improvement in computational efficiency, both theoretically and empirically.

Results

  • Top-1 accuracy on ImageNet v.s. GFLOPs

  • Top-1 accuracy on CIFAR v.s. GFLOPs

  • Top-1 accuracy on ImageNet v.s. Throughput

  • Visualization

Pre-trained Models

Backbone # of Exits # of Tokens Links
T2T-ViT-12 3 7x7-10x10-14x14 Tsinghua Cloud / Google Drive
  • What are contained in the checkpoints:
**.pth.tar
├── model_state_dict: state dictionaries of the model
├── flops: a list containing the GFLOPs corresponding to exiting at each exit
├── anytime_classification: Top-1 accuracy of each exit
├── dynamic_threshold: the confidence thresholds used in budgeted batch classification
├── budgeted_batch_classification: results of budgeted batch classification (a two-item list, [0] and [1] correspond to the two coordinates of a curve)

Requirements

  • python 3.7.7
  • pytorch 1.3.1
  • torchvision 0.4.2

Evaluate Pre-trained Models

Read the evaluation results saved in pre-trained models

CUDA_VISIBLE_DEVICES=0 python inference.py --batch_size 128 --model DVT_T2t_vit_12 --checkpoint_path PATH_TO_CHECKPOINTS  --eval_mode 0

Read the confidence thresholds saved in pre-trained models and infer the model on the validation set

CUDA_VISIBLE_DEVICES=0 python inference.py --data_url PATH_TO_DATASET --batch_size 128 --model DVT_T2t_vit_12 --checkpoint_path PATH_TO_CHECKPOINTS  --eval_mode 1

Determine confidence thresholds on the training set and infer the model on the validation set

CUDA_VISIBLE_DEVICES=0 python inference.py --data_url PATH_TO_DATASET --batch_size 128 --model DVT_T2t_vit_12 --checkpoint_path PATH_TO_CHECKPOINTS  --eval_mode 2

The dataset is expected to be prepared as follows:

ImageNet
├── train
│   ├── folder 1 (class 1)
│   ├── folder 2 (class 1)
│   ├── ...
├── val
│   ├── folder 1 (class 1)
│   ├── folder 2 (class 1)
│   ├── ...

Contact

If you have any question, please feel free to contact the authors. Yulin Wang: [email protected].

Acknowledgment

Our code of T2T-ViT from here.

To Do

  • Update the code for training.
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