The one I came up with is here:
The script is here:
http://paste.yt-project.org/show/6165/
On Mon, Jan 18, 2016 at 9:45 AM, Matthew Turk matthewturk@gmail.com wrote:
Hi all,
I've experimented a bit and come up with this:
https://images.hub.yt/u/fido/m/9bbe3cf6-png/
The script:
http://paste.yt-project.org/show/6151/
This was designed with the viscm project, which is awfully cool. What do folks think? I think Kacper and Nathan also experimented with viscm and have some ideas too, so maybe we should put it up for an eventual vote.
Also, I would campaign for calling whatever our new colormap turns out to be one of these three things, in increasing order of my preference:
agar kelp kanten
-Matt
On Thu, Jan 14, 2016 at 10:57 AM, Matthew Turk matthewturk@gmail.com wrote:
Hi Stuart and everyone else,
This is great info. I appreciate everyone's thoughtful replies.
Having both a sequential colormap (which would replace algae) and a diverging colormap, would be awesome. The Paraview devs shipped the new matplotlib ones (like Inferno) in 5.0. I think it would be a fun experiment to see if we can come up with something sufficiently "branded" or different. And then if we can't, fall back on something like Inferno?
-Matt
On Wed, Jan 6, 2016 at 12:48 PM, Levy, Stuart A salevy@illinois.edu
wrote:
There was a fair bit of discussion about colormaps - terrible, useful, beautiful - at IEEE Vis last October. The viridis colormap was a
featured
one. So was the traditional rainbow, which lots of info-vis and
perceptual
people piled on to criticize.
Among design criteria for a continuous-valued colormap is whether it's "sequential" (like the typical yt colormap, or viridis) or "diverging". You'd want a diverging colormap to show signed deviations from a norm - where the eye should be caught by places where a value is either much
less
than, or much more than, something in the middle. Is it worth
offering a
typical divergent colormap, as well as a new typical sequential one, in
yt?
Note that among the Stefan van der Walt & Nathaniel Smith writeup ( http://bids.github.io/colormap/ ) on their development of better
cmaps, they
use Nathan Goldbaum's galaxy evolution as a test case for six
(sequential)
examples! => http://vorpus.org/~njs/goldbaum-galaxies-all-colormaps.mkv
A neat web site with sample colormaps - aimed at mapping discrete
values on
geographic maps, so not directly applicable but cool - is this, by
Cynthia
Brewer and Mark Harrower at PSU: http://colorbrewer2.org/ It has a library of predesigned cmaps, and lets you sift them by being colorblind-safe, photocopy safe, etc. ________________________________ From: yt-dev [yt-dev-bounces@lists.spacepope.org] on behalf of B.W.
Keller
[kellerbw@mcmaster.ca] Sent: Wednesday, January 06, 2016 12:13 To: yt-dev@lists.spacepope.org Subject: Re: [yt-dev] Default colormap
There is a really excellent paper on designing color maps called "Color Sequences for Univariate Maps: Theory, Experiments, and Principles"
that you
can get here:
http://ccom.unh.edu/sites/default/files/publications/Ware_1988_CGA_Color_seq...
If we design a new colormap, this would be a good reference along with
those
scipy resources. I personally would love to have an accessible,
yt-custom
colormap.
On Wed, Jan 6, 2016 at 11:50 AM, Erik Schnetter schnetter@gmail.com
wrote:
I think there are several colourmaps that were created when Viridis was invented. I personally like Inferno.
-erik
On Wed, Jan 6, 2016 at 11:34 AM, Nathan Goldbaum <
nathan12343@gmail.com>
wrote:
I would also be for coming up with our own colormap. That said, I
think
simply modifying algae won't be enough, since it is too perceptually nonlinear.
On Wed, Jan 6, 2016 at 10:32 AM, John ZuHone jzuhone@gmail.com
wrote:
I would go for modifying algae.
> On Jan 6, 2016, at 11:30 AM, Matthew Turk matthewturk@gmail.com > wrote: > > Hi folks, > > For a long time we've used "algae," which was designed by Britton > about eight years ago, as the default colormap. This has been
really
> nice for "branding" yt -- if you see an algae plot, it's probably > (not > definitely) made with yt. But it's also not accessible from a > colorblindness perspective. Stefan van der Walt has been giving
some
> really great talks lately about building a better colormap for > matplotlib (e.g., https://www.youtube.com/watch?v=xAoljeRJ3lU )
which
> culminated in viridis, which is shipping in recent versions of > matplotlib and will become the default. > > In support of this, he built a tool called viscm which can
generate
> reduced versions of colormaps to show what they would be like with > varying degrees of insensitivity to color. I've generated outputs > from viscm of three of the custom colormaps we ship with yt: > > Algae: https://images.hub.yt/u/fido/m/d275d5e1-png/ > Cubehelix: https://images.hub.yt/u/fido/m/8e698928-png/ (I
believe
> this is now also shipped with MPL) > Kamae: https://images.hub.yt/u/fido/m/e0e40efa-png/ > > I love algae, but it's not the best from an accessibility > perspective. > > I'd like to propose that we use a new default colormap. If we do > this, I see two options: > > * Retain a "branding" by developing a new one either by using the > techniques used by matplotlib (or one of the maps they opted not
to
> use) or by modifying algae to be more accessible; looking at the > response functions, I suspect it would be reasonably possible to > modify it. (Modifying algae is my preference.) > * Use viridis (which we may then have to ship if we have older > versions of matplotlib to support) > > -Matt > _______________________________________________ > yt-dev mailing list > yt-dev@lists.spacepope.org > http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org
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