[Forschungsseminar-BSV] Research Seminar 'Computer Graphics, Image Processing, and Visualization'
Vanessa Kretzschmar
kretzschmar at informatik.uni-leipzig.de
Mi Jun 7 12:41:46 CEST 2023
I N V I T A T I O N
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to the Research Seminar 'Computer Graphics, Image Processing, and
Visualization'
on Wednesday, June the 21st, 2023, at 01:15 PM,
in the room P-701, Paulinum, Augustusplatz 10, 04109 Leipzig, also
online.
(https://conf.fmi.uni-leipzig.de/b/van-bwb-jil-vk2)
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A talk will be given by
Roxana Bujack
and is entitled:
'The Non-Riemannian Nature of Perceptual Color Space'
Abstract:
The scientific community generally agrees on the theory, introduced by
Riemann and furthered by Helmholtz and Schrödinger, that perceived
color
space is not Euclidean but rather, a three-dimensional Riemannian
space.
We show that the principle of diminishing returns applies to human
color
perception. This means that large color differences cannot be derived
by adding a series of small steps, and therefore, perceptual color
space
cannot be described by a Riemannian geometry. This finding is
inconsistent
with the current approaches to modeling perceptual color space.
Therefore,
the assumed shape of color space requires a paradigm shift.
Consequences
of this apply to color metrics that are currently used in image and
video
processing, color mapping, and the paint and textile industries. These
metrics are valid only for small differences. Rethinking them outside
of a Riemannian setting could provide a path to extending them to large
differences. This finding further hints at the existence of a
second-order
Weber–Fechner or Stevens law describing perceived differences.
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On behalf of Professor Scheuermann all those interested are cordially
invited to attend.
Yours sincerely
Vanessa Kretzschmar
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