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Proceedings Paper

Controlling colour-printed gloss by varnish-halftones
Author(s): Sepideh Samadzadegan; Teun Baar; Philipp Urban; Maria V. Ortiz Segovia; Jana Blahová
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Paper Abstract

Printing appearance effects beyond colour - such as gloss - is an active research topic in the scope of multi-layer printing (2.5D or 3D printing). Such techniques may enable a perceptually more accurate reproduction of optical material properties and are required to avoid appearance related artefacts sometimes observed in regular colour printing - such as bronzing and differential gloss. In addition to technical challenges of printing such effects, a perceptual space that describes the related visual attributes is crucial; particularly to define perceptually meaningful tolerances and for appearance gamut mapping. In this paper, we focus on spatially-varying gloss created by varnish-halftones. This enables us to print specular gloss effects covering a large portion of the NCS gloss scale from full matte to high gloss. We then conduct a psychophysical experiment to find the relationship between measured specular gloss and a perceptually uniform gloss scale. Our results show that this relationship can be well described by a power function according to Stevens Power Law.

Paper Details

Date Published: 13 March 2015
PDF: 10 pages
Proc. SPIE 9398, Measuring, Modeling, and Reproducing Material Appearance 2015, 93980V (13 March 2015); doi: 10.1117/12.2080805
Show Author Affiliations
Sepideh Samadzadegan, Technische Univ. Darmstadt (Germany)
Teun Baar, Océ Print Logic Technologies (France)
Mines ParisTech (France)
Télécom ParisTech (France)
Philipp Urban, Fraunhofer-Institut für Graphische Datenverarbeitung (Germany)
Maria V. Ortiz Segovia, Océ Print Logic Technologies S.A. (France)
Jana Blahová, Technische Univ. Darmstadt (Germany)

Published in SPIE Proceedings Vol. 9398:
Measuring, Modeling, and Reproducing Material Appearance 2015
Maria V. Ortiz Segovia; Philipp Urban; Francisco H. Imai, Editor(s)

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