title: Global color estimation of special-effect coatings from measurements by commercially available portable multiangle spectrophotometers.
abstract: Colors of special-effect coatings have strong dependence on illumination/viewing geometry and an appealing appearance. An open question is to ask about the minimum number of measurement geometries required to completely characterize their observed color shift. A recently published principal components analysis (PCA)-based procedure to estimate the color of special-effect coatings at any geometry from measurements at a reduced set of geometries was tested in this work by using the measurement geometries of commercial portable multiangle spectrophotometers X-Rite MA98, Datacolor FX10, and BYK-mac as reduced sets. The performance of the proposed PCA procedure for the color-shift estimation for these commercial geometries has been examined for 15 special-effect coatings. Our results suggest that for rendering the color appearance of 3D objects covered with special-effect coatings, the color accuracy obtained with this procedure may be sufficient. This is the case especially if geometries of X-Rite MA98 or Datacolor FX10 are used.
authors.forename: A
authors.initials: A
authors.lastname: Ferrero
authors.forename: J
authors.initials: J
authors.lastname: Campos
authors.forename: E
authors.initials: E
authors.lastname: Perales
authors.forename: F M
authors.initials: FM
authors.lastname: Martínez-Verdú
authors.forename: I
authors.initials: I
authors.lastname: van der Lans
authors.forename: E
authors.initials: E
authors.lastname: Kirchner