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holoviz / colorcet

A set of useful perceptually uniform colormaps for plotting scientific data
http://colorcet.holoviz.org
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Users Guide Palettes showing non-continuous artifacts #30

Closed flutefreak7 closed 5 years ago

flutefreak7 commented 5 years ago

Several of the images in the users guide are showing strange non-continuous colors within parts of the palette:

image

image

Let me know if what I'm saying isn't visually apparent.

jbednar commented 5 years ago

Can you maybe edit that image in a paint program and circle the problematic areas?

flutefreak7 commented 5 years ago

Oh wow, apparently I have a monitor that doesn't do certain colors well and I only really notice it when looking at colormaps...

image

The blue to green transition is all messed up in weird ways. This is clearly a monitor or graphics card thing because my other 2 monitors show it fine. Sorry for the noise!

Edit: A factory reset on the offending monitor fixed it. Upon further investigation the monitor was set to use an sRGB color space which causes weird artifacts especially in the blue green transition.

jbednar commented 5 years ago

I'm glad that colorcet was able to reveal the problem for you! It's good to start from a position where the colormap should be uniform, so that any deviations from uniform become obvious...