https://staging.pixls.us/tags/3/ Recent content in 3 on PIXLS.US Hugo en-us Sun, 26 Jan 2020 00:00:00 +0000 https://staging.pixls.us/articles/darktable-3-rgb-or-lab-which-modules-help/ Sun, 26 Jan 2020 00:00:00 +0000 https://staging.pixls.us/articles/darktable-3-rgb-or-lab-which-modules-help/ <p><a href="https://darktable.fr/2020/01/darktable-3-rgb-ou-lab-quels-modules-au-secours/" target="_blank" rel="noopener">Original post in French</a> by <a href="https://darktable.fr/author/aurelienpierre/" target="_blank" rel="noopener">Aurélien PIERRE</a> , edited by the pixls community.</p> <p>Darktable is slowly converging to a scene-referred RGB workflow. Why is that? What does it involve? How does the use of darktable change? Answers here…</p> <p><em>This article begins with a 3 section introduction of the Lab space. You don&rsquo;t need to understand it in detail in order to understand what happens next.</em></p> <h2 id="what-is-lab"> <a href="#what-is-lab"> What is Lab? </a> </h2> <p>The color space <a href="https://en.wikipedia.org/wiki/CIELAB_color_space" target="_blank" rel="noopener">CIE Lab</a> was published in 1976 by the International Commission on Illumination (CIE), in an attempt to mathematically describe the color perception of the average human being. Lab space aims to decouple the brightness information (L channel) from the chroma information (channels a and b) and takes into account the non-linear corrections that the human brain makes to the linear signal it receives from the retina. Lab space is derived from <a href="https://en.wikipedia.org/wiki/CIE_1931_color_space" target="_blank" rel="noopener">CIE XYZ space</a> , which represents the physiological response of 3 of the 4 types of photo-sensitive cells in the retina (the cones).</p>