PUBLICATIONS OF THE ASTRONOMICAL OBSERVATORY OF BELGRADE104, Page 119-124, https://doi.org/10.69646/aob104p119
PROCEEDINGS of the XX Serbian Astronomical Conference, Belgrade, October 16 - 20, 2023, Edited by Jelena Petrović, Dušan Marčeta and Ana Lalović
Published by: Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia

Abstract. We propose a post-processing technique for Monte Carlo radiative transfer (MCRT) simulations with a main goal to reduce the total computational run time required for high quality images, by enhancing the output of lower quality images. Our method combines dimensionality reduction techniques with integrated nested Laplace approximation (INLA) to detect and reconstruct the underlying structure in lower quality images or images with missing data. We test the efficiency of our approach using high resolution synthetic observations of Milky Way-sized galaxy from the SKIRT Auriga project. This technique is able to reproduce high-photon-number reference images ∼ 5 times faster with median residuals below ∼ 20%.