Ray-LUT: A Lookup-Based Method for Camera Lens Simulation in Real-Time Using Ray Tracing

Jan Honsbrok, Sina Mostafawy, Jens Herder, Alina Huldtgren

2025

Abstract

Lens systems have a major influence on the image due to effects such as depth of field or optical aberrations. The only method to simulate these effects precisely is to trace rays through an actual lens system. This provides accurate results, but only with high computational effort. To speed up the ray tracing through the lens system, various acceleration methods have been developed, requiring considerable precomputations. We present a new method based on the Realistic Camera by Kolb et. al.. Instead of tracing each ray through the lens system, the rays are precomputed once and stored in a lookup table. In contrast to other methods, our method is simple, and does not require substantial preprocessing upfront. We can simulate complex effects such as chromatic aberrations accurately in real-time, regardless the number of lens surfaces in the system. Our method achieves the same performance as state-of-the-art methods like Polynomial Optics, while maintaining the same number of samples per pixel.

Paper Citation

in Harvard Style

Honsbrok J., Mostafawy S., Herder J. and Huldtgren A. (2025). Ray-LUT: A Lookup-Based Method for Camera Lens Simulation in Real-Time Using Ray Tracing. In Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 1: GRAPP; ISBN 978-989-758-728-3, SciTePress, pages 177-184. DOI: 10.5220/0013105900003912

in Bibtex Style

@conference{grapp25,
author={Jan Honsbrok and Sina Mostafawy and Jens Herder and Alina Huldtgren},
title={Ray-LUT: A Lookup-Based Method for Camera Lens Simulation in Real-Time Using Ray Tracing},
booktitle={Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 1: GRAPP},
year={2025},
pages={177-184},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0013105900003912},
isbn={978-989-758-728-3},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 1: GRAPP
TI - Ray-LUT: A Lookup-Based Method for Camera Lens Simulation in Real-Time Using Ray Tracing
SN - 978-989-758-728-3
AU - Honsbrok J.
AU - Mostafawy S.
AU - Herder J.
AU - Huldtgren A.
PY - 2025
SP - 177
EP - 184
DO - 10.5220/0013105900003912
PB - SciTePress