Busting bad colormaps with Python and Panel
I have not done much work with, or written here on the blog about colormaps and perception in quite some time. Last spring, however, I decided to build a web-based […]
Tag Archives: rainbow colormap
How to fix rainbows and other bad colormaps using Python
Yep, colormaps again! In my 2014 tutorial on The Leading Edge I showed how to Evaluate and compare colormaps (Jupyter notebook here). The article followed an extended series of posts (The rainbow […]
Logarithmic spiral, nautilus, and rainbow
The other day I stumbled into an interesting article on The Guardian online: The medieval bishop who helped to unweave the rainbow. In the article I learned for the first time of Robert […]
Spectral lightness rainbow colormap
Spectral lightness rainbow Quick post to share my replica of Ethan Montag ‘s Spectral lightness colormap from this paper. My version has a linear Lightness profile (Figure 1) that increases monotonically […]
New rainbow colormap: sawthoot-shaped lightness profile
Why another rainbow In the comment section of my last post Steve Eddins from Mathworks reported that some Matlab users prefer Jet to Parula, the new default perceptual colormap in Matlab, because within certain ranges […]
What your brain does with colours when you are not “looking” – part 2
In What your brain does with colours when you are not “looking”, part 1, I displayed some audio spectrogram data (courtesy of Giuliano Bernardi at the University of Leuven) using 5 different colormaps to render the amplitude […]
Geophysical tutorial – How to evaluate and compare colormaps in Python
These below are two copies of a seismic horizon from the open source Penobscot 3D seismic survey coloured using two different colormaps (data from Hall, 2014). Do you think either of them is ‘better’? […]
New Matlab isoluminant colormap for azimuth data
I recently added to my Matlab File Exchange function, Perceptually improved colormaps, a colormap for periodic data like azimuth or phase. I am going to briefly showcase it using data from my degree […]
