The Colour of the Night Sky

A fulldome-film made with the help of DiCaLum:

!!! A new version of DiCaLum will be distributed by the end of April 2024 !!!

About DiCaLum

DiCaLum is a collection of Python routines and a simple GUI to convert digital camera raw images to radiance maps. The code is freely available as a windows executable:

Please note that DiCaLum is still in development, it is a Beta version of the code.

A brief description of DiCalum:

A short indtroduction is available here:

For testing DiCaLum we provide a test image with the corresponding input JSON file:

The metrics used in DiCaLum was introduced in this paper:

Zoltán Kolláth, Andrew Cool, Andreas Jechow, Kornél Kolláth, Dénes Száz, Kai Pong Tong: Introducing the dark sky unit for multi-spectral measurement of the night sky quality with commercial digital cameras, Journal of Quantitative Spectroscopy and Radiative Transfer,
Volume 253, (2020) 107162,

Some related publications:

Zoltán Kolláth, Dénes Száz, Kai Pong Tong, Kornél Kolláth: The Colour of the Night Sky. Journal of Imaging. 2020; 6(9):90.

Zoltán Kolláth, Dénes Száz, Kornél Kolláth, Kai Pong Tong:  Light Pollution Monitoring and Sky Colours. J. Imaging 2020, 6, 104.

Zoltán Kolláth & Anita Dömény: "Night sky quality monitoring in existing and planned dark sky parks by digital cameras", International Journal of Sustainable Lighting, Vol 19 No 1 61-68 (2017)

Andreas Jechow, Zoltán Kolláth, Salvador J. Ribas, Henk Spoelstra, Franz Hölker & Christopher C. M. Kyba: "Imaging and mapping the impact of clouds on skyglow with all-sky photometry",
Scientific Reports 7, Article number: 6741 (2017)