Darktable on ITOHI — Open-Source Hardware, Embedded Systems & DIY Buildshttps://itohi.com/tags/darktable/Recent content in Darktable on ITOHI — Open-Source Hardware, Embedded Systems & DIY BuildsHugo -- gohugo.ioen2022 @ ITOHI - All rights reservedSun, 26 Oct 2025 18:00:00 +0200DIY Color Calibration Chart: From Sublimation Printer to Acrylic Painthttps://itohi.com/colorimetry/diy-color-chart/Sun, 26 Oct 2025 18:00:00 +0200https://itohi.com/colorimetry/diy-color-chart/ <p>In the <a href="https://itohi.com/colorimetry/reverse-engineering-cr30/">previous post</a> I mentioned wanting to build a DIY color chart that could serve as a reference for Darktable's color calibration module. That article teased this as &quot;a topic for another time.&quot; This is that time.</p> <p>The idea is simple in theory: print a set of known color patches, measure each one with the CR30, and use ArgyllCMS to build a correction profile. In practice it took two completely different approaches before I got anything usable.</p>