Upcoming book: 52 things you should know about Geocomputing
I am very excited to write that, after a successful second attempt at collecting enough essays, the book 52 Things You Should Know About Geocomputing, by Agile Libre, is very […]
Tag Archives: colour
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 […]
Computer vision in geoscience: recover seismic data from images, introduction
In a recent post titled Unweaving the rainbow, Matt Hall described our joint attempt (partly successful) to create a Python tool to enable recovery of digital data from any pseudo-colour scientific […]
New Horizons truecolor Pluto recolored in Viridis and Inferno
Oh, the new, perceptual MatplotLib colormaps….. Here’s one stunning, recent Truecolor image of Pluto from the New Horizons mission: Below, I recolored using two of the new colormaps:
Reinventing the color wheel – part 2
In the first post of this series I argued that we should not build colormaps for azimuth (or phase) data by interpolating linearly between fully saturated hues in RGB or HSL space. A first step […]
Reinventing the color wheel – part 1
In New Matlab isoluminant colormap for azimuth data I showcased a Matlab colormap that I believe is perceptually superior to the conventional, HSV-based colormaps for azimuth data, in that it does not […]
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 […]
