The Metric of Colour Space

Research output: Contribution to journalJournal articleResearchpeer-review

302 Downloads (Pure)

Abstract

The space of colours is a fascinating space. It is a real vector space, but no matter what inner product you put on the space the resulting Euclidean distance does not correspond to human perception of difference between colours.

In 1942 MacAdam performed the first experiments on colour matching and found the MacAdam ellipses which are often interpreted as defining the metric tensor at their centres. An important question is whether it is possible to define colour coordinates such that the Euclidean distance in these coordinates correspond to human perception.

Using cubic splines to represent the colour coordinates and an optimisation approach we find new colour coordinates that make the MacAdam ellipses closer to uniform circles than the existing standards.
Original languageEnglish
JournalGraphical Models
Volume82
Issue numberNovember
Pages (from-to)77-86
ISSN1524-0703
DOIs
Publication statusPublished - 2015

Keywords

  • Colour distance
  • MacAdam ellipses
  • Riemannian metric
  • B-splines
  • Geodesic circles

Cite this