Detectron2 implementation of DA-RetinaNet

This is the implementation of our Image and Vision Computing 2021 work 'An unsupervised domain adaptation scheme for single-stage artwork recognition in cultural sites'. The aim is to reduce the gap between source and target distribution improving the object detector performance on the target domain when training and test data belong to different distributions. The original paper can be found here.
If you want to use this code with your dataset, please follow the following guide.

Please leave a star ⭐ and cite the following paper if you use this repository for your project.

@article{PASQUALINO2021104098,
    title = "An unsupervised domain adaptation scheme for single-stage artwork recognition in cultural sites",
    journal = "Image and Vision Computing",
    pages = "104098",
    year = "2021",
    issn = "0262-8856",
    doi = "https://doi.org/10.1016/j.imavis.2021.104098",
    author = "Giovanni Pasqualino and Antonino Furnari and Giovanni Signorello and Giovanni Maria Farinella",
}

DA-RetinaNet Architecture

Installation

You can use this repo following one of these three methods:
NB: Detectron2 0.6 is required, installing other versions this code will not work.

Google Colab

Quickstart here 👉
Or load and run the DA-RetinaNet.ipynb on Google Colab following the instructions inside the notebook.

Detectron2 on your PC

Follow the official guide to install Detectron2 0.6
Or
Download the official Detectron2 0.6 from here
Unzip the file and rename it in detectron2
run python -m pip install -e detectron2

Detectron2 via Dockerfile

Follow these instructions:

cd docker/
# Build 
docker build -t detectron2:v0 .

# Launch
docker run --gpus all -it --shm-size=8gb -v /home/yourpath/:/home/yourpath --name=name_container detectron2:v0

If you exit from the container you can restart it using:

docker start name_container
docker exec -it name_container /bin/bash

Dataset

Create the Cityscapes-Foggy Cityscapes dataset following the instructions available here
The UDA-CH dataset is available here

Data Preparation

If you want to use this code with your dataset arrange the dataset in the format of COCO or PASCAL VOC.
For COCO annotations, inside the script uda_train.py register your dataset using:

register_coco_instances("dataset_name_source_training",{},"path_annotations","path_images")
register_coco_instances("dataset_name_target_training",{},"path_annotations","path_images")
register_coco_instances("dataset_name_target_test",{},"path_annotations","path_images")

For PASCAL VOC annotations, inside the cityscape_train.py register your dataset using:

register_pascal_voc("city_trainS", "cityscape/VOC2007/", "train_s", 2007, ['car','person','rider','truck','bus','train','motorcycle','bicycle'])
register_pascal_voc("city_trainT", "cityscape/VOC2007/", "train_t", 2007, ['car','person','rider','truck','bus','train','motorcycle','bicycle'])
register_pascal_voc("city_testT", "cityscape/VOC2007/", "test_t", 2007, ['car','person','rider','truck','bus','train','motorcycle','bicycle'])

You need to replace the parameters inside the register_pascal_voc() function according to your dataset name and classes.

Training

Replace at the following path detectron2/modeling/meta_arch/ the dense_detector.py script with our dense_detector.py.
Do the same for the fpn.py file at the path detectron2/modeling/backbone/

Run the script uda_train.py for COCO annotations or cityscape_train.py for PASCAL VOC annotations.

Trained model on Cityscapes to FoggyCityscapes is available at this link:
DA-RetinaNet_Cityscapes

Trained models on the proposed UDA-CH dataset are available at these links:
DA-RetinaNet
DA-RetinaNet-CycleGAN

Testing

If you want to test the model load the new weights, set to 0 the number of iterations and rerun the same script used for the training.

Results on Cityscapes -> Foggy Cityscapes

Results adaptation between Cityscapes and Foggy Cityscapes dataset. The performance scores of the methods marked with the “*” symbol are reported from the authors of their respective papers.

Model	mAP
Faster RCNN*	20.30%
DA-Faster RCNN*	27.60%
StrongWeak*	34.30%
Diversify and Match*	34.60%
DA-RetinaNet	44.87%
RetinaNet (Oracle)	53.46%

Results on the proposed dataset Synthetic -> Real

Results of DA-Faster RCNN, Strong-Weak and the proposed DA-RetinaNet combined with image-to-image translation approach.

	image to image translation (CycleGAN)
Object Detector	None	Synthetic to Real
DA-Faster RCNN	12.94%	33.20%
StrongWeak	25.12%	47.70%
DA-RetinaNet	31.04%	58.01%

Other Works

STMDA-RetinaNet
Detectron2 implementation of DA-Faster RCNN