Two uniform patches presented on two displays under identical viewing conditions can appear as the same color to one observer but as mismatched colors to another observer. This phenomenon, called observer metamerism (OM), occurs due to individual differences in color matching functions. To avoid its potentially adverse impacts in display calibration and characterization, it is desirable to have a predictive model of OM. In this work, we report the computational results of how to use existing metrics to quantify the potential OM between commercial display pairs and a proposed OM metric that is verified through a psychophysical experiment.
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http://dx.doi.org/10.1364/JOSAA.382228 | DOI Listing |
Opt Express
September 2024
Department of Experimental Psychology, University of Oxford, Anna Watts Building, Radcliffe Observatory Quarter, Woodstock Road, Oxford OX2 6GG, UK.
Color supports object identification. However, two objects that differ in color under one light can appear indiscriminable under a second light, a phenomenon known as illuminant metamerism. Past studies evaluated the frequency of illuminant metamerism only under single, uniform illuminants.
View Article and Find Full Text PDFJ Mol Model
July 2024
Department of Chemical Sciences, Auckland Park Kingsway (APK) Campus, University of Johannesburg, PO Box 524, Auckland Park, 2006, Johannesburg, South Africa.
Context: This work reports structure-property correlations of 27 zwitterions Reichardt's types of zwitterions. Focuses are twofold, to see the (1) impacts of metamerism with Reichardt's vs Brooker's types of zwitterions and (2) impacts of monocyclic aromatic rings as bridges. All the molecules considered here have pyridinium (common acceptor: A) and p-phenylene-dicyanomethanide (common donor: D).
View Article and Find Full Text PDFPLoS One
June 2024
Department of Anthropology, University of Arkansas, Fayetteville, Arkansas, United States of America.
Objective: The patterning cascade model of crown morphogenesis has been studied extensively in a variety of organisms to elucidate the evolutionary history surrounding postcanine tooth form. The current research is the first to use a large modern human sample to examine whether the crown configuration of lower deciduous and permanent molars aligns with expectations derived from the model. This study has two main goals: 1) to determine if metameric and antimeric pairs significantly differ in size, accessory trait expression, and relative intercusp spacing, and 2) assess whether the relative distance among early-forming cusps accounts for observed variation in accessory cusp expression.
View Article and Find Full Text PDFJ Neurosci
June 2024
Department of Biological Structure, University of Washington, Seattle, Washington 98195
Visual crowding refers to the phenomenon where a target object that is easily identifiable in isolation becomes difficult to recognize when surrounded by other stimuli (distractors). Many psychophysical studies have investigated this phenomenon and proposed alternative models for the underlying mechanisms. One prominent hypothesis, albeit with mixed psychophysical support, posits that crowding arises from the loss of information due to pooled encoding of features from target and distractor stimuli in the early stages of cortical visual processing.
View Article and Find Full Text PDFJ Adv Prosthodont
February 2024
Prosthodontics, Bezmialem Vakif University, Istanbul, Türkiye.
Purpose: To evaluate the metameric disparities among monolithic zirconia materials with differing yttrium compositions across various lighting conditions.
Materials And Methods: Thirty-six square-shaped zirconia samples measuring 10 × 10 × 0.5 mm were prepared from monolithic zirconia materials with three different yttrium contents.
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