A cross-polarization as a possible cause for color shift in illumination

Abu Haila, Tarek ; Tausch, Reimar ; Ritz, Martin ; Santos, Pedro ; Fellner, Dieter W. (2023)
A cross-polarization as a possible cause for color shift in illumination.
In: Electronic Imaging, 35 (15)
doi: 10.2352/EI.2023.35.15.COLOR-192
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Despite that a cross-polarization is a very efficient way to remove undesired reflections and specularities while imaging and digitizing certain type of materials. It does not come, however, with no risk when color fidelity and accuracy are of importance. This paper shows that a cross-polarization could alter and shift the Chroma component of a light source (D50) by different factors, undoubtedly, depending on the polarization filters’ quality in-use. Statistics show a color difference, DE00, of at least 3.59 and at worst 7.34 when a cross-polarization is in-place compared to non-polarized settings. That corresponds to a shift in color correlated temperature ranging from 50K to 360K consequently.

Typ des Eintrags:

Artikel

Erschienen:

2023

Autor(en):

Abu Haila, Tarek ; Tausch, Reimar ; Ritz, Martin ; Santos, Pedro ; Fellner, Dieter W.

Art des Eintrags:

Bibliographie

Titel:

A cross-polarization as a possible cause for color shift in illumination

Sprache:

Englisch

Publikationsjahr:

Januar 2023

Verlag:

Society for Imaging Science and Technology

Titel der Zeitschrift, Zeitung oder Schriftenreihe:

Electronic Imaging

Jahrgang/Volume einer Zeitschrift:

(Heft-)Nummer:

DOI:

10.2352/EI.2023.35.15.COLOR-192

Kurzbeschreibung (Abstract):

Alternatives oder übersetztes Abstract:

Alternatives Abstract

Sprache

A cross polarization could be indispensable in certain applications when scanning and digitizing highly reflective materials or when certain applications couldn’t afford following the recommended imaging geometry 00/450 | 45o/0o for some technical reasons. However, that puts very much color fidelity in question, to which extent a cross polarization may impact the source illuminant in the first place that is consequently impacting the color appearance during the imaging and the color correction procedures. In this research we show how certain cross polarization setups are adding a chroma tint to the light source, D50 in this study, causing by that undesirable color shift of the color of the light source. Consequently, a shift in its color correlated temperature moving, in worst case scenario, from ~5000K to ~4500K and resulting in an increased DE00 as a result of the added chroma when compared against a standard D50; nearly doubled in best case scenario and nearly tripled in worst case scenario

Englisch

Freie Schlagworte:

Polarization, Correlated color temperature (CCT), Illumination

Zusätzliche Informationen:

Art.No.: 192

Fachbereich(e)/-gebiet(e):

20 Fachbereich Informatik
20 Fachbereich Informatik > Graphisch-Interaktive Systeme

Hinterlegungsdatum:

15 Mär 2023 11:41

Letzte Änderung:

04 Jul 2023 11:36

PPN: