Roxana Bujack

Los Alamos National Laboratory researcher leading a color-geometry research line distinct from the DFKI Ahrens/Schotten group. Her PNAS 2022 paper (with Teti, Miller, Caffrey & Turton) showed that perceptual color space is not even Riemannian — a Riemannian metric overestimates the perception of large color differences, because perception exhibits diminishing returns that a Riemannian (locally-integrated) metric cannot represent. Her 2025 Computer Graphics Forum paper (with Stark, Turton, Miller & Rogers), read directly at capture time, extends this into a non-Riemannian geometric framework and cites Judd (1968) and Silberstein (1938) as the earliest precedents for treating color space as curved — the citation that, read closely, supplied the vault's clearest historical anchor for that lineage.

References

• claim-perceptual-color-space-not-riemannian-bujack-2022
• claim-judd-1968-silberstein-1938-precede-color-space-curvature-claim
• observation-cielab-nonuniformity-bridges-gradient-geometry-not-sampling-artifact