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https://github.com/sail-sg/iFormer
iFormer: Inception Transformer
https://github.com/sail-sg/iFormer
Last synced: 3 months ago
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iFormer: Inception Transformer
- Host: GitHub
- URL: https://github.com/sail-sg/iFormer
- Owner: sail-sg
- License: apache-2.0
- Created: 2022-05-25T09:40:25.000Z (about 2 years ago)
- Default Branch: main
- Last Pushed: 2023-01-14T05:16:47.000Z (over 1 year ago)
- Last Synced: 2023-11-07T19:27:22.113Z (8 months ago)
- Language: Python
- Homepage:
- Size: 110 KB
- Stars: 218
- Watchers: 16
- Forks: 17
- Open Issues: 7
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Lists
- awesome-stars - iFormer - sg | 223 | (Python)
README
# iFormer: [Inception Transformer](http://arxiv.org/abs/2205.12956) (NeurIPS 2022 Oral)
This is a PyTorch implementation of iFormer proposed by our paper "[Inception Transformer](http://arxiv.org/abs/2205.12956)".
## Image Classification
### 1. Requirements
torch>=1.7.0; torchvision>=0.8.1; timm==0.5.4; fvcore; [apex-amp](https://github.com/NVIDIA/apex) (if you want to use fp16);
data prepare: ImageNet with the following folder structure, you can extract ImageNet by this [script](https://gist.github.com/BIGBALLON/8a71d225eff18d88e469e6ea9b39cef4).
```
│imagenet/
├──train/
│ ├── n01440764
│ │ ├── n01440764_10026.JPEG
│ │ ├── n01440764_10027.JPEG
│ │ ├── ......
│ ├── ......
├──val/
│ ├── n01440764
│ │ ├── ILSVRC2012_val_00000293.JPEG
│ │ ├── ILSVRC2012_val_00002138.JPEG
│ │ ├── ......
│ ├── ......
```
### Main results on ImageNet-1K
| Model | #params | FLOPs | Image resolution | acc@1| Model |
| :--- | :---: | :---: | :---: | :---: | :---: |
| iFormer-S | 20M | 4.8G | 224 | 83.4 | [model](https://huggingface.co/sail/dl2/resolve/main/iformer/iformer_small.pth)/[config](https://github.com/sail-sg/iFormer/blob/main/checkpoint/iformer_small/args.yaml)/[log](https://github.com/sail-sg/iFormer/blob/main/checkpoint/iformer_small/summary.csv) |
| iFormer-B | 48M | 9.4G | 224 | 84.6 | [model](https://huggingface.co/sail/dl2/resolve/main/iformer/iformer_base.pth)/[config](https://github.com/sail-sg/iFormer/blob/main/checkpoint/iformer_base/args.yaml)/[log](https://github.com/sail-sg/iFormer/blob/main/checkpoint/iformer_base/summary.csv) |
| iFormer-L | 87M | 14.0G | 224 | 84.8 | [model](https://huggingface.co/sail/dl2/resolve/main/iformer/iformer_large.pth)/[config](https://github.com/sail-sg/iFormer/blob/main/checkpoint/iformer_large/args.yaml)/[log](https://github.com/sail-sg/iFormer/blob/main/checkpoint/iformer_large/summary.csv) |
Fine-tuning Results with larger resolution (384x384) on ImageNet-1K
| Model | #params | FLOPs | Image resolution | acc@1| Model |
| :--- | :---: | :---: | :---: | :---: | :---: |
| iFormer-S | 20M | 16.1G | 384 | 84.6 | [model](https://huggingface.co/sail/dl2/resolve/main/iformer/iformer_small_384.pth)/[config](https://github.com/sail-sg/iFormer/blob/main/checkpoint_384/iformer_small_384/args.yaml)/[log](https://github.com/sail-sg/iFormer/blob/main/checkpoint_384/iformer_small_384/summary.csv) |
| iFormer-B | 48M | 30.5G | 384 | 85.7 | [model](https://huggingface.co/sail/dl2/resolve/main/iformer/iformer_base_384.pth)/[config](https://github.com/sail-sg/iFormer/blob/main/checkpoint_384/iformer_base_384/args.yaml)/[log](https://github.com/sail-sg/iFormer/blob/main/checkpoint_384/iformer_base_384/summary.csv) |
| iFormer-L | 87M | 45.3G | 384 | 85.8 | [model](https://huggingface.co/sail/dl2/resolve/main/iformer/iformer_large_384.pth)/[config](https://github.com/sail-sg/iFormer/blob/main/checkpoint_384/iformer_large_384/args.yaml)/[log](https://github.com/sail-sg/iFormer/blob/main/checkpoint_384/iformer_large_384/summary.csv) |
### Training
Train iformer_small on 224
```bash
python -m torch.distributed.launch --nproc_per_node=8 train.py /dataset/imagenet \
--model iformer_small -b 128 --epochs 300 --img-size 224 --drop-path 0.2 --lr 1e-3 \
--weight-decay 0.05 --aa rand-m9-mstd0.5-inc1 --warmup-lr 1e-6 --warmup-epochs 5 \
--output checkpoint --min-lr 1e-6 --experiment iformer_small
```
Finetune on 384 based on the pretrained checkpoint on 224
```bash
python -m torch.distributed.launch --nproc_per_node=8 fine-tune.py /dataset/imagenet \
--model iformer_small_384 -b 64 --lr 1e-5 --min-lr 1e-6 --warmup-lr 2e-8 --warmup-epochs 0 \
--epochs 20 --img-size 384 --drop-path 0.3 --weight-decay 1e-8 --mixup 0.1 --cutmix 0.1 \
--cooldown-epochs 10 --aa rand-m9-mstd0.5-inc1 --clip-grad 1.0 --output checkpoint_fine \
--initial-checkpoint checkpoint/iformer_small/model_best.pth.tar \
--experiment iformer_small_384
```
### Validation
```bash
python validate.py /dataset/imagenet --model iformer_small --checkpoint checkpoint/iformer_small/model_best.pth.tar
```
## Object Detection and Instance Segmentation
All models are based on Mask R-CNN and trained by 1x training schedule.
| Backbone | #Param. | FLOPs | box mAP | mask mAP |
|:---------:|:-------:|:-----:|:-------:|:--------:|
| iFormer-S | 40M | 263G | 46.2 | 41.9 |
| iFormer-B | 67M | 351G | 48.3 | 43.3 |
## Semantic Segmentation
| Backbone | Method | #Param. | FLOPs | mIoU |
|:---------:|---------|:-------:|:-----:|:----:|
| iFormer-S | FPN | 24M | 181G | 48.6 |
| iFormer-S | Upernet | 49M | 938G | 48.4 |
## Bibtex
```
@inproceedings{
si2022inception,
title={Inception Transformer},
author={Chenyang Si and Weihao Yu and Pan Zhou and Yichen Zhou and Xinchao Wang and Shuicheng YAN},
booktitle={Advances in Neural Information Processing Systems},
year={2022}
}
```
## Acknowledgment
Our implementation is mainly based on the following codebases. We gratefully thank the authors for their wonderful works.
[pytorch-image-models](https://github.com/rwightman/pytorch-image-models), [mmdetection](https://github.com/open-mmlab/mmdetection), [mmsegmentation](https://github.com/open-mmlab/mmsegmentation).
Besides, Weihao Yu would like to thank TPU Research Cloud (TRC) program for the support of partial computational resources.