VisDA 2022 Challenge

[Challenge website]

Datasets preparation

The pytorch implementation of the ZeroWaste dataset can be found in here.

Baseline (DAFormer)

Set up the environment

We use the official implementation of the state-of-the-art transformer-based domain adaptation methods DAFormer as our baseline. To get started, please follow the instructions on how to set up the environment on the DAFormer github page.

Download checkpoints

To download all relevant checkpoints, please use our script.

sh tools/download_checkpoints.sh

Setup Datasets

ZeroWaste V1: Please, download zerowaste-f.zip (7 G) from here and extract them to data/zerowaste-f.

ZeroWaste V2 (unlabeled) Please, download zerowaste-v2-trainval.zip (12 G) from here and extract it to data/zerowaste-v2-splits/.

ZeroWaste V2 (test) Please, download zerowaste-v2-test.zip (1.8 G) from here and extract it to data/zerowaste-v2-splits/.

SynthWaste: Please, download synthwaste_splits.zip (48 G) from here and extract it to data/synthwaste.

SynthWaste-aug: Please, download synthwaste_aug.zip (33G) from here and extract it to data/synthwaste-aug (this folder contains only the augmented train set).

Note: if you want to retrain the model on the combination of SynthWaste-aug and ZeroWaste-f, please combine the folders of ZeroWaste V1 and SynthWaste-aug to the folder data/synthwaste_aug_zerowastev1.

Training

We provide the following config files:

1. configs/daformer/zerowaste_to_zerowastev2_daformer_mit5.py for training DAFormer on ZeroWaste V1 as source domain and ZeroWaste V2 as target domain.
2. configs/source_only/zerowaste_to_zerowastev2_segformer.json to train SegFormer on ZeroWaste V1 and test on ZeroWaste V2 (source-only).
3. configs/daformer/synthzerowaste_to_zerowastev2_daformer.py to train DAFormer on the combination of SynthWaste-aug and ZeroWaste V1 as source domain and ZeroWaste V2 as target domain.
4. configs/source_only/synthzerowaste_segformer.json to train SegFormer on the combination of SynthWaste-aug and ZeroWaste V1 and test on ZeroWaste V2 (source-only).

To train the model with a desired configuration, run

python -m tools.train /path/to/config/file --work-dir /path/to/experiment/folder

The checkpoints, full config file and other relevant data will be stored in the experiment folder. By default, the experiments will be saved to the work_dirs folder. For more details on how to use the code, please see the official DAFormer guide.

Testing & Predictions

To evaluate the model and output the visual examples of the predictions, run the following command:

python -m tools.test /path/to/config/file /path/to/checkpoint.pth --eval mIoU --show-dir /path/to/output/predictions --opacity 1

To get the predictions for the validation set of ZeroWasteV2, please use the corresponding *_val.json config file or modify the config file in configs/_base_/datasets/*.json to point to the validation data_root in the test dataset configuration. To produce final predictions in the original label mapping (0 = 'background', 1 = 'rigid_plastic', 2 = 'cardboard', 3 = 'metal', 4 = 'soft_plastic'), use the following script:

python -m tools.convert_visuals_to_labels /path/to/output/predictions /output/label/path/

Submit on eval.ai

For evaluation, participants are required to join VisDA-2022 the challenge on eval.ai. Please create an account on eval.ai with the same email address you used to sign up for the challenge. Under the VisDA-2022 challenge, go to "Participate" and create a team with the same name as the one you registered. All members of a team need not be on eval.ai as long as one member in the team can submit.

Information regarding challenge phases can be found under "Phases". We are currently in Phase-1, the development phase of the challenge. For evaluating your method, you can submit a zip file of your predictions in the format described below. eval.ai allows you to submit either via the web UI or via a command line interface. In Phase-1 each time has a limit of 5 submissions per day.

Once submitted, you can see the status of your submission under "My Submissions". Each evaluation takes around 9 mins during which your submission will be in the "Running" state. The server handles one submission at a time, so you may see your submission in the "Submitted" state before it gets to "Running".

Refer to evalai documentation for more information on how to participate and how to make submissions public. We encourage participants to make their best submissions publicly visible on the leaderboard in the dev phase. Note that this will be a requirement in the test phase, for a participating solution to be considered for a prize.

Feel free to contact the visda organizers via email, or a github issue for questions regarding the interface.

Submission format

For both phases, we ask the participants to submit their predictions in the following format: the submitted file should be a zip archive containing two folders: source_only and uda containing predictions of the source-only and adaptation version of their solution. Each folder should contain the predicted label maps in the original label mapping (0 = 'background', 1 = 'rigid_plastic', 2 = 'cardboard', 3 = 'metal', 4 = 'soft_plastic') that should have the same name and file extension as the corresponding input images.

Baseline results

The baseline results on the test and validation sets of ZeroWaste V2 are as follows:

Experiment	test mIoU	test Acc	val mIoU	val Acc
SegFormer V1	45.49	91.64	45.56	87.85
SegFormer Synthwaste_aug+V1	42.61	91.22	41.2	87.19
DAFormer V1->V2	52.26	91.2	50.84	87.29
DAFormer SynthWaste_aug+V1->V2	48.31	90.63	46.29	87.0

Custom simulation

We also allow the participants to generate their custom synthetic datasets to achieve the best performance. Please see how to use our simulation software here.