POV-Ray : Newsgroups : povray.general : 4 color maps from Python's Matplotlib Server Time
3 Dec 2022 11:22:16 EST (-0500)
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From: Dave Blandston
Subject: Re: 4 color maps from Python's Matplotlib
Date: 31 Jan 2022 23:25:00
Message: <web.61f8b5c13e1033442636f1af607c1b34@news.povray.org>
"Tor Olav Kristensen" <tor### [at] TOBEREMOVEDgmailcom> wrote:
> I've now made a GitHub repository with color maps for POV-Ray v3.7 from the
> Plasma, Inferno, Magma and Viridis color maps in Python's Matplotlib.


Those are really useful gradients. I used the Inferno one in a recent project
and learned a little about the way they were developed - it's fascinating. It
took me a while to find the data so your post is an excellent idea!

Kind regards,
Dave Blandston


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From: Kenneth
Subject: Re: 4 color maps from Python's Matplotlib
Date: 1 Feb 2022 15:15:00
Message: <web.61f993a63e1033444cef624e6e066e29@news.povray.org>
"Kenneth" <kdw### [at] gmailcom> wrote:
>
> Nope; I took a look at one of my older oddly-shaped image posts in
> binaries:images, and its preview is truncated there as well.
>

It occurred to me that there might be two different meanings of 'preview' here:
One is the little thumbnail-sized image that we see when we scroll through the
messages in the web-portal. That's the one that can be truncated. The other is
when we click on that thumbnail-- which brings up the full non-truncated image
in its own window.

Just to clarify ;-)


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From: Thomas de Groot
Subject: Re: 4 color maps from Python's Matplotlib
Date: 2 Feb 2022 02:15:49
Message: <61fa2fa5$1@news.povray.org>
Op 01/02/2022 om 21:10 schreef Kenneth:
> "Kenneth" <kdw### [at] gmailcom> wrote:
>>
>> Nope; I took a look at one of my older oddly-shaped image posts in
>> binaries:images, and its preview is truncated there as well.
>>
> 
> It occurred to me that there might be two different meanings of 'preview' here:
> One is the little thumbnail-sized image that we see when we scroll through the
> messages in the web-portal. That's the one that can be truncated. The other is
> when we click on that thumbnail-- which brings up the full non-truncated image
> in its own window.
> 
> Just to clarify ;-)
> 
>

AHA! I almost choked on my morning frog pill!

I certainly mixed up the two 'meanings' of preview. I naively thought 
that the thumbnail /always/ reproduced the full image; clearly not. No 
matter. I can live with that. Just learned something new today. :-)

Thanks Kenneth!

-- 
Thomas


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From: Tor Olav Kristensen
Subject: Re: 4 color maps from Python's Matplotlib
Date: 6 Feb 2022 13:15:00
Message: <web.62000fb73e103344501ba4b089db30a9@news.povray.org>
"Dave Blandston" <IsN### [at] protonmailch> wrote:
> "Tor Olav Kristensen" <tor### [at] TOBEREMOVEDgmailcom> wrote:
> > I've now made a GitHub repository with color maps for POV-Ray v3.7 from the
> > Plasma, Inferno, Magma and Viridis color maps in Python's Matplotlib.
>
>
> Those are really useful gradients. I used the Inferno one in a recent project
> and learned a little about the way they were developed - it's fascinating. It
> took me a while to find the data so your post is an excellent idea!

Thank you Dave!

While experimenting with Python's matplotlib and some medical CT-scanned images,
I learned about the qualities of different color maps. Interesting stuff.

Now I hope that other POV-Ray people will find them useful.

--
Tor Olav
http://subcube.com
https://github.com/t-o-k


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From: Thomas de Groot
Subject: Re: 4 color maps from Python's Matplotlib
Date: 7 Feb 2022 02:26:38
Message: <6200c9ae$1@news.povray.org>
Op 06/02/2022 om 19:13 schreef Tor Olav Kristensen:
> Now I hope that other POV-Ray people will find them useful.
> 

Oh yes! One way or another they will find their way... if not only as 
eye candy. :-)

Thanks for your efforts!

-- 
Thomas


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