colour-science

New blog post: A Decade of Slug This talks about the evolution of the Slug font rendering algorithm, and it includes an exciting announcement: The patent has been dedicated to the public domain. terathon.com/blog/decade-sl…

I've been working with Spherical Gaussians recently as a representation for irradiance in realtime raytracing. Ended up deriving quite a few new approximations relating to SGs and diffuse lighting. Ended up with something both cheap and accurate. Link below

@SoufianeKHIAT @SheriefFYI MIT is great, same for BSD-3 and Apache 2.

@SheriefFYI @colour_science MIT any concern on this one?

Introducing Alwan (ألوان): A pure C colour science library 100+ RGB spaces, 30+ colour spaces, ACES 1.x & 2.0, spectral processing, CAMs, ... Zero dependencies. Unit tested against @colour_science. f32 or f64 floats. Looking for reviewers before public release (DM for repo). 1/15

@SoufianeKHIAT @wenzeljakob Bit of pressure to ensure we are doing things correctly! :)

@colour_science @wenzeljakob Testing: Extensive unit tests validated against @colour_science as reference. 1. Python generates reference values as CSV embedded in C 2. Used in API + unit tests 3. Supports f32/f64 (validated in f64) If it works in colour-science, it works in Alwan. 13/15

Gaussian-based spectral upsampling using the hierarchical decomposition algorithm from Smits (1999): colour-science.org/posts/gaussian…

Colour 0.4.7 has been released: It is packed with new features and improvements! colour-science.org/posts/colour-0…

Christoph Peters has finished his series on Spectral Rendering: #RGB_rendering" target="_blank" rel="nofollow noopener">momentsingraphics.de/SpectralRender…

@ID_AA_Carmack Are you using static typing tools, e.g., Pyright, Mypy, et al.? They will not necessarily prevent multiple assignment but they will certainly catch type changes, e.g., `foo=1;foo=“bar”` and yell at you! This could also be made a Ruff check. @charliermarsh for vis.

When I started working in python, I got lazy with “single assignment”, and I need to nudge myself about it. You should strive to never reassign or update a variable outside of true iterative calculations in loops. Having all the intermediate calculations still available is helpful in the debugger, and it avoids problems where you move a block of code and it silently uses a version of the variable that wasn’t what it originally had. In C/C++, making almost every variable const at initialization is good practice. I wish it was the default, and mutable was a keyword.

This year, we managed to ship Python 3.14 support for uv and Ruff on the day of the stable release. A big lift from the whole team. We wrote up a guide on some of our favorite features from 3.14, and how they affect our tools.

Python 3.14 is out today! Here are my notes on the new release: simonwillison.net/2025/Oct/8/pyt… If you're an open source library maintainer who supports all current Python releases this also means you can drop 3.9 support now and start depending on features from 3.10, like match/case

@lauriewired Some don’t really need to have higher limits, e.g., displays, unless you are looking at VR and other exotic usages.

It’s easy to predict how tech will change in your lifetime based on which mechanisms are already near theoretical limits. - Battery energy density - Display Resolution - Datacenter Cooling - Drone Endurance - Skyscraper height All very unlikely to 10x.

The new OpenColorIO Configuration(s) for ACES 2.0 have been released! The `cg-config-v4.0.0_aces-v2.0_ocio-v2.5.ocio` and `studio-config-v4.0.0_aces-v2.0_ocio-v2.5.ocio` configs are already shipped in the OpenColorIO v2.5.0 release. github.com/AcademySoftwar…

OpenColorIO 2.5.0 was released! github.com/AcademySoftwar…

We are happy to announce the release of Colour - CxF. This extension package for Colour implements reading and writing files in the Color Exchange Format (CxF). github.com/colour-science…

that's right👍

Last week, I published a chapter about color. It's fairly comprehensive: makingsoftware.com/chapters/color…

Much like humans, CPUs heal in their sleep. CPUs are *technically* replaceable / wear items. They don’t last forever. Yet, the moment stress is removed, transistor degradation (partially) reverses. It's called Bias Temperature Instability (BTI) recovery:

@alexfry Ah! Can't edit, all good, there is only One now anyway :)

@colour_science Transformers One!

Display Transformers : The Development of ACES 2.0 and It's Implementation on Transformers. youtu.be/VZti3UztRE4