Sun Off, Lights On (SOLO): Photorealistic Monocular Nighttime Simulation for Robust Semantic Perception

WACV 2025 (Oral)

This repository represents the official implementation of the paper titled "Sun Off, Lights On: Photorealistic Monocular Nighttime Simulation for Robust Semantic Perception".

Konstantinos Tzevelekakis, Shutong Zhang, Luc Van Gool, Christos Sakaridis

We present SOLO (Sun Off, Lights On), a monocular day-to-night translation method that can be used to translate a daytime semantic segmentation dataset into a nighttime one by converting each daytime image to its nighttime counterpart while preserving the original semantic segmentation annotations. To the best of our knowledge, SOLO is the first monocular physically based approach in 3D for simulating nighttime.

📢 News & To-Do

• 2024-11-19: Project related information.
• 2025-02-23: Code for SOLO pipeline and intermediate pipeline results.
• 2025-02-23: The Nighttime Illuminants Dataset.
• 2025-02-23: The ACDC Light Source Annotations.
• 2025-02-23: README files describing the functionality of the SOLO pipeline.
• Adapted CISS evaluation-code for SOLO on Semantic Segmentation.
• Instructions for installing and running SOLO pipeline and results replication.

🎓 Citation

Please cite our paper:

@inproceedings{tzevelekakis2025solo,
author = {Tzevelekakis, Konstantinos and Zhang, Shutong and Van Gool, Luc and Sakaridis, Christos},
title = {{Sun Off, Lights On}: Photorealistic Monocular Nighttime Simulation for Robust Semantic Perception},
booktitle = {Proceedings of the IEEE/CVF Winter Conference on Applications of Computer Vision (WACV)},
year = {2025}}

Acknowledgment

This work was supported by an ETH Career Seed Award.