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. 2022 Jun 28;9:370. doi: 10.1038/s41597-022-01450-y

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Visualization of the saturation and intensity based patch quality filter. Top Left: saturation was calculated for various RGB colors. The red dashed line shows the used threshold value 0.05, which is clearly a permissive cutoff. Bottom Left: Zoomed to the highlighted 0.0–0.2 region. ε = 10⁻⁸ is needed for numerical stability. Right: intensity plotted for a few RGB colors, the colors are considered burnout if their intensity is over 245. On the figure the red dashed line separates the burnout colors.