This may or may not relate to the current threads about mind v body,
perceptual nature of reality, etc that we have been flogging, but it is
a topic I lived in and around for most of my career and found it both
familiar/compelling and a little disturbing:
The general topic is the non-Reimannian nature of perceptual color spaces.
The broadly accepted non-Euclidean color spaces described by the CIE
formulations (1931 and 1976) has been widely accepted while the
RGB/CMYK/HSV Euclidean approximations are what most folks use for pretty
good practical reasons (particular the conveniences of
tristimulus/process color specification and synthesis).
This recent (1 year old) publication work by some LANL folks was shoved
in my face/space recently (as a correlate to the problems we have been
working with on trying to understand the underlying space of abstract
high dimensional (very non-linear) problems such as ensemble
steering/exploration in the World3 model. Our favored method (of the
moment) is a variant of tSNE
<https://en.wikipedia.org/wiki/T-distributed_stochastic_neighbor_embedding><https://en.wikipedia.org/wiki/T-distributed_stochastic_neighbor_embedding>which
prefers a locally accurate metric over a global one.
The LANL work on this non-Reimannian color space:
https://www.pnas.org/doi/full/10.1073/pnas.2119753119
A popular article about that work:
https://www.fastcompany.com/90780869/it-could-take-20-more-years-for-scientists-to-truly-understand-color
<https://www.fastcompany.com/90780869/it-could-take-20-more-years-for-scientists-to-truly-understand-color>
I'm guessing this (at least) crossed Ed Angel's awareness, perhaps there
are a few others here who care about this level of detail/abstraction on
color/perceptual spaces? Frank is probably a lot more up on the nuances
of (non) Reimannian manifolds than I ever will be... I don't know if
this represents an interesting example of the utility of such?
-. --- - / ...- .- .-.. .. -.. / -- --- .-. ... . / -.-. --- -.. .
FRIAM Applied Complexity Group listserv
Fridays 9a-12p Friday St. Johns Cafe / Thursdays 9a-12p Zoom
https://bit.ly/virtualfriam
to (un)subscribe http://redfish.com/mailman/listinfo/friam_redfish.com
FRIAM-COMIC http://friam-comic.blogspot.com/
archives: 5/2017 thru present https://redfish.com/pipermail/friam_redfish.com/
1/2003 thru 6/2021 http://friam.383.s1.nabble.com/
