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- Publisher
- Wiley
- Copyright
- © 2021 Wiley Periodicals LLC.
- ISSN
- 0361-2317
- eISSN
- 1520-6378
- DOI
- 10.1002/col.22586
- Publisher site
- See Article on Publisher Site
Abstract
Optimal colours for human vision occur on the boundary of a three‐dimensional object‐colour solid, and result from optimal reflectance spectra that take on only the values 0 and 1, with at most two transitions between those values. Different illuminants lead to different solids. If there are two illuminants and a single sensing device, then we can construct a six‐dimensional double object‐colour solid by concatenating colour signals from both illuminants. Colours on the boundary of a double‐object solid, and the spectra that generate them, can also be called optimal. This article shows that, while optimal spectra for double solids take on only the values 0 and 1, there is no maximum number of transitions between those values: given a device, we can always construct two illuminants such that the resulting double object‐colour solid has an optimal reflection spectrum with as many transitions as desired.
Journal
Color Research & Application – Wiley
Published: Feb 1, 2021
Keywords: ;