DuPL

This repository contains the source code of CVPR 2024 paper: "DuPL: Dual Student with Trustworthy Progressive Learning for Robust Weakly Supervised Semantic Segmentation".

📢 Update Log

• Mar. 21, 2024 (U2): Add the evaluation / visualization scripts for CAM and segmentation inference.
• Mar. 21, 2024 (U1): The pre-trained checkpoints and segmentation results released 🔥🔥🔥.
• Mar. 17, 2024: Basic training code released.

Get Started

Training Environment

The implementation is based on PyTorch 1.13.1 with single-node multi-gpu training. Please install the required packages by running:

pip install -r requirements.txt

Datasets

VOC dataset

1. Download from official website

wget http://host.robots.ox.ac.uk/pascal/VOC/voc2012/VOCtrainval_11-May-2012.tar
tar –xvf VOCtrainval_11-May-2012.tar

2. Download the augmented annotations

The augmented annotations are from SBD dataset. Here is a download link of the augmented annotations at DropBox. After downloading SegmentationClassAug.zip, you should unzip it and move it to VOCdevkit/VOC2012. The directory should be:

VOCdevkit/
└── VOC2012
    ├── Annotations
    ├── ImageSets
    ├── JPEGImages
    ├── SegmentationClass
    ├── SegmentationClassAug
    └── SegmentationObject

COCO dataset

1. Download

wget http://images.cocodataset.org/zips/train2014.zip
wget http://images.cocodataset.org/zips/val2014.zip

2. Generating VOC style segmentation labels for COCO

The training pipeline use the VOC-style segmentation labels for COCO dataset, please download the converted masks from One Drive. The directory should be:

MSCOCO/
├── coco2014
│    ├── train2014
│    └── val2014
└── SegmentationClass (extract the downloaded "coco_mask.tar.gz")
     ├── train2014
     └── val2014

NOTE: You can also use the scripts provided at this repo to covert the COCO segmentation masks.

Experiments

Training DuPL

To train the segmentation model for the VOC dataset, please run

# For Pascal VOC 2012
python -m torch.distributed.run --nproc_per_node=2 train_final_voc.py --data_folder [../VOC2012]

NOTE: The --nproc_per_node should be set according to your environment (recommend: 2x NVIDIA RTX 3090 GPUs ).

To train the segmentation model for the MS COCO dataset, please run

# For MSCOCO
python -m torch.distributed.run --nproc_per_node=4 train_final_coco.py --data_folder [../MSCOCO/coco2014]

NOTE: The --nproc_per_node should be set according to your environment (recommend: 4x NVIDIA RTX 3090 GPUs ).

Evaluation

Please install pydensecrf first:

pip install git+https://github.com/lucasb-eyer/pydensecrf.git

NOTE: using pip install pydensecrf will install an incompatible version ⚠️.

To evaluate the trained model, please run:

# For Pascal VOC
python eval_seg_voc.py --data_folder [../VOC2012] --model_path [path_to_model]

# For MSCOCO
python -m torch.distributed.launch --nproc_per_node=4 eval_seg_coco_ddp.py --data_folder [../MSCOCO/coco2014] --label_folder [../MSCOCO/SegmentationClass] --model_path [path_to_model]

NOTE:

• The segmentation results will be saved at the checkpoint directory
• DuPL has two independent models (students), and we select the best one for evaluation. IN FACT, we can use some tricks, such as ensemble or model soup, to further improve the performance (maybe).

Convert rgb segmentation labels for the official VOC evaluation:

# modify the "dir" and "target_dir" before running
python convert_voc_rgb.py

CAM inference & evaluation:

python infer_cam_voc.py --data_folder [../VOC2012] --model_path [path_to_model]

NOTE: The CAM results will be saved at the checkpoint directory.

TIPS:

• The evaluation on MS COCO use DDP to accelerate the evaluation stage. Please make sure the torch.distributed.launch is available in your environment.
• We highly recommend use high-performance CPU for CRF post-processing. This processing is quite time-consuming. On MS COCO, it may cost several hours for CRF post-processing.

Results

Checkpoints

We have provided DuPL's pre-trained checkpoints on VOC and COCO datasets. With these checkpoints, it should be expected to reproduce the exact performance listed below.

Dataset	val	Log	Weights	val (with MS+CRF)	test (with MS+CRF)
VOC	69.9	log	weights	72.2	71.6
VOC (21k)	--	log	weights	73.3	72.8
COCO	--	log	weights	43.5	--
COCO (21k)	--	log	weights	44.6	--

The VOC test results are evaluated on the official server, and the result links are provided in the paper.

Visualization

We have provided the visualization of CAMs and segmentation images (RGB) on VOC 2012 (val and test) and MS COCO in the following links. Hope they can help you to easily compare with other works :)

Dataset	Link	Model
VOC - Validaion	dupl_voc_val.zip	DuPL (VOC test: 71.6)
VOC - Test	dupl_voc_test.zip	DuPL (VOC test: 71.6)
COCO - Validation	dupl_coco_val.zip	DuPL (COCO val: 43.5)

Citation

Please kindly cite our paper if you find it's helpful in your work:

@misc{wu2024dupl,
      title={DuPL: Dual Student with Trustworthy Progressive Learning for Robust Weakly Supervised Semantic Segmentation}, 
      author={Yuanchen Wu and Xichen Ye and Kequan Yang and Jide Li and Xiaoqiang Li},
      year={2024},
      eprint={2403.11184},
      archivePrefix={arXiv},
}

Acknowledgement

We would like to thank all the researchers who open source their works to make this project possible, especially thanks to the authors of Toco for their brilliant work.