@inproceedings{b9d765f1eabb443eac389e914c48a42e,
title = "Efficient metropolis path sampling for material editing and re-rendering",
abstract = "This paper proposes efficient path sampling for re-rendering scenes after material editing. The proposed sampling method is based on Metropolis light transport (MLT) and distributes more path samples to pixels whose values have been changed significantly by editing. First, we calculate the difference between images before and after editing to estimate the changes in pixel values. In this step, we render the difference image directly rather than calculating the difference in the images by separately rendering the images before and after editing. Then, we sample more paths for pixels with larger difference values and render the scene after editing by reducing variances of Monte Carlo estimators using the control variates. Thus, we can obtain rendering results with a small amount of noise using only a small number of path samples. We examine the proposed sampling method with a range of scenes and demonstrate that it achieves lower estimation errors and variances over the state-of-the-art methods.",
keywords = "Material editing, Metropolis light transport, Ray tracing",
author = "Tomoya Yamaguchi and Tatsuya Yatagawa and Shigeo Morishima",
note = "Funding Information: This study was granted in part by the Strategic Basic Research Program ACCEL of the Japan Science and Technology Agency (JPM-JAC1602). Tatsuya Yatagawa was supported by a Research Fellowship for Postdoctoral Researchers of Japan{\textquoteright}s Society for the Promotion of Science (16J02280). Shigeo Morishima was supported by a Grant-in-Aid of Waseda Research Institute of Advanced Science and Engineering. Publisher Copyright: {\textcopyright} 2018 The Author(s).; 26th Pacific Conference on Computer Graphics and Applications, Pacific Graphics 2018 ; Conference date: 08-10-2018 Through 11-10-2018",
year = "2018",
doi = "10.2312/pg.20181271",
language = "English",
series = "Proceedings - Pacific Conference on Computer Graphics and Applications",
publisher = "IEEE Computer Society",
pages = "21--24",
editor = "Hongbo Fu and Abhijeet Ghosh and Johannes Kopf",
booktitle = "Pacific Graphics 2018 - 26th Pacific Conference on Computer Graphics and Applications, Short Papers and Posters Proceedings",
}