Research a colorblind-friendly color map for tensors/fiber distributions

[saundersresearch]

Problem

Diffusion tensors and fiber orientation distribution functions often use a color mapping to encode directions (red: left-right, green: anterior-posterior, blue: superior-inferior):

A close-up view of diffusion tensors:

However, this is not accessible for people with color blindness. Additionally, colors are muddled along the directions in between anatomical axes.

Idea

We want a color mapping that will:

• Encode direction
• Be accessible to color blindness

Good places to start

• Previous work in "scientific visualizations" for criteria for a color mapping: https://www.fabiocrameri.ch/colourmaps/
• Application to quantitative MRI: https://doi.org/10.1002/mrm.30290

[saundersresearch]

A relevant paper: https://cagataydemiralp.io/projects/boys/Demiralp-2009-CLF.pdf

[saundersresearch]

This is a pretty comprehensive paper on the development of the RBG map: https://doi.org/10.1002/(SICI)1522-2594(199909)42:3<526::AID-MRM15>3.0.CO;2-J

[saundersresearch]

Linking: brainhack-vandy/brainhack-vandy.github.io#59 (comment)

[neurolabusc]

Here is the NiiVue live demo - the display pulldown menu allows you to simulate different color schemes, including the traditional RGB and the CYB (Cyan Yellow, Blue) variant. You can modify the code here to test variations.

[neurolabusc]

For completeness, another great resource on meaningful resources is @CPernet's brain_colours associated with this citation.

The cube helix family of colormaps is also useful.

These schemes may be less focused on colorblindness, but do try to maximize the synergy between hue and intensity.