What is it about?
The artificial light sources make our daily life convenient, but they cause a serious problem called light pollution. We propose a system for efficient visualization of the light pollution for the night sky. Our system can render realistic images of the light pollution at arbitrary locations on a given terrain map.
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Photo by Caleb White on Unsplash
Why is it important?
For the visualization of the light pollution, we have to take into account many city light sources on the ground, resulting in expensive computational cost. We address this problem by precomputing a set of intensity distributions of the sky illuminated by a city light for different locations and atmospheric conditions. We apply the principal component analysis and the fast Fourier transform to the precomputed distributions. We achieve more than 1000 times faster faster computation compared to a naive approach , whic further allows us to interactively solve an inverse problem that determines the city light intensity to reduce the light pollution.
Perspectives
I have always enjoyed developing interactive systems, like the one featured in this article. Writing 10,000 lines of code for this project was a rewarding experience. As a computer graphics researcher, I approached this work unaware of the issue of light pollution. I hope this article will serve as a valuable resource for researchers in both computer graphics and light pollution studies.
Professor Yoshinori Dobashi
Hokkaido Daigaku
Read the Original
This page is a summary of: Efficient Visualization of Light Pollution for the Night Sky, ACM Transactions on Graphics, December 2023, ACM (Association for Computing Machinery),
DOI: 10.1145/3618337.
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