Competition

Evaluation Criteria

Our evaluation metrics are calculated within the sRGB color space. We assess the performance by measuring the discrepancy between the results and the ground truth images.

We employ the standard Peak Signal To Noise Ratio (PSNR) and the Structural Similarity Index (SSIM) in grayscale, as is commonly used in the literature. The final evaluation metric can be calculated using the following formula:

$$Score=\log_k(SSIM*k^{PSNR})=PSNR-\log_k(SSIM)$$

In our implementation, $k=1.2$.

For the final ranking, we will use the average Score as the primary measure. The complexity of the algorithm will only serve as a reference and will not be included in the final metric. Please refer to the evaluation function in the 'evaluate.py' of the scoring program.

Submission

During the development phase, the participants can submit their results on the validation set to the CodaLab server. The validation set should only be used for evaluation and analysis purposes but NOT for training. At the testing phase, the participants will submit the whole restoration results of the test set. This should match the last submission to the CodaLab.

Terms and Conditions

General Rules

The Low Light Image Enhancement Challenge is one track of PBDL-Challenge, Physics Based Vision meets Deep Learning Workshop 2024, in conjunction with CVPR 2024. Participants are not restricted to train their algorithms only on the provided dataset. Other PUBLIC dataset can be used as well. Participants are expected to develop more robust and generalized methods for low light image enhancement in real-world scenarios.

When participating in the competition, please be reminded that:

• Results in the correct format must be uploaded to the evaluation server. The evaluation page lists detailed information regarding how results will be evaluated.
• Each entry must be associated to a team and provide its affiliation.
• Using multiple accounts to increase the number of submissions and private sharing outside teams are strictly prohibited.
• The organizer reserves the absolute right to disqualify entries which is incomplete or illegible, late entries or entries that violate the rules.
• The organizer reserves the right to adjust the competition schedule and rules based on situations.
• The best entry of each team will be public in the leaderboard at all time.
• To compete for awards, the participants must fill out a factsheet briefly describing their methods. There is no other publication requirement.

Terms of Use: Dataset

Before downloading and using the dataset, please agree to the following terms of use. You, your employer and your affiliations are referred to as "User". The organizers and their affiliations, are referred to as "Producer".

• All the data is used for non-commercial/non-profit research purposes only.
• All the images in the dataset can be used for academic purposes.
• The User takes full responsibility for any consequence caused by his/her use of the dataset in any form and shall defend and indemnify the Producer against all claims arising from such uses.
• The User should NOT distribute, copy, reproduce, disclose, assign, sublicense, embed, host, transfer, sell, trade, or resell any portion of the dataset to any third party for any purpose.
• The User can provide his/her research associates and colleagues with access to dataset (the download link or the dataset itself) provided that he/she agrees to be bound by these terms of use and guarantees that his/her research associates and colleagues agree to be bound by these terms of use.
• The User should NOT remove or alter any copyright, trademark, or other proprietary notices appearing on or in copies of the dataset.
• This agreement is effective for any potential User of the dataset upon the date that the User first accesses the dataset in any form.
• The Producer reserves the right to terminate the User's access to the dataset at any time.
• For using the dataset, please consider citing the paper (if any):

@article{fu2022gan,
  title={LE-GAN: Unsupervised low-light image enhancement network using attention module and identity invariant loss},
  author={Fu, Ying and Hong, Yang and Chen, Linwei and You, Shaodi},
  journal={Knowledge-Based Systems},
  volume={240},
  pages={108010--108020},
  year={2022},
  publisher={Elsevier}
}

Reproducibility

Industry and research labs are allowed to submit entries and to compete in both the validation phase and the final test phase. However, in order to get officially ranked on the final test leaderboard and to be eligible for awards the reproducibility of the results is a must and, therefore, the participants need to make available and submit their codes or executables. All the top entries will be checked for reproducibility and marked accordingly.