Translucency perception: A review

Gigilashvili, Davit; Thomas, Jean‐Baptiste; Hardeberg, Jon Yngve; Pedersen, Marius

doi:10.1167/jov.21.8.4

“…By manipulating the weights of the image features listed by Beurs -highlights, edge reflections, and bloom -Di Cicco et al (2020a) inferred a causal relationship with the perception of the material properties glossiness, translucency, and bloom. The highlights were used as perceptual cues for glossiness and translucency perception, in agreement with the literature (Chadwick and Kentridge, 2015;Fleming and Bülthoff, 2005), and the edge reflections also increased the translucent appearance, again in agreement with literature about the cues for translucency (Fleming and Bülthoff, 2005;Gigilashvili et al, 2021;Gkioulekas et al, 2015;Nagai et al, 2013;Wijntjes et al, 2020;Xiao et al, 2020), whereas the image feature of the bloom was the direct trigger of bloom perception. Di Cicco et al (2019) further showed that the glossiness of grapes is predicted by high contrast, blurry highlights, in agreement with Beurs' instructions.…”

Section: An Index Of Key Features For Materials Perceptionsupporting

confidence: 84%

The Legacy of Willem Beurs ‒ Bridging the Gap between Art and Material Perception

Cicco

¹

2022

Art Percept.

2

0

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Dutch Golden Age painters could convincingly depict all sorts of materials. How did they do it and how do we perceive them as such, are questions that only recently have started to be addressed by art historians and vision scientists, respectively. This paper aims to discuss how a booklet of pictorial recipes written by the Dutch painter Willem Beurs in 1692 constitutes an index of key image features for material depiction and perception. Beurs’ recipes connect different materials according to their shared visual features, and offer the profiles, i.e., the optimal combinations, of these features to render a wide range of materials. By combining representation and perception, the knowledge of painters about the depiction of materials can help to understand the mechanisms of the visual system for material perception, and these in turn can explain the pictorial features that make the pictorial representation of materials so convincing.

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“…Translucency is defined as the ability of a substance to pass through the light and is in between a range from complete opacity to transparency [ 10 ]. Another property which is inversely related to translucency is masking ability.…”

Section: Introductionmentioning

confidence: 99%

Masking Ability of Bleach Shade Composite Resins in Different Thicknesses

Haghi

¹

,

Molaee

²

,

Kamran

³

et al. 2022

International Journal of Dentistry

6

2

0

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Introduction. In recent years, the use of bleach shade composite resins has increased due to the high esthetic demands. The aim of the present study was to investigate the masking ability and translucency of several bleach shade composite resins. Materials and Methods. In this in vitro study, 180 discs from 9 bleach shade composite resins of 5 brands (G-aenial Anterior, Gradia Direct, Charisma Diamond, Estelite Sigma Quick, and Renamel Microfill) in thicknesses of 0.5, 1, 1.5, and 2 mm were prepared. The color parameters of the specimens were measured in a CIE l ∗ a ∗ b ∗ system using a spectrophotometer. Masking ability and translucency parameters were calculated, and the influence of thickness, shade, and composite resin brand on these variables was analyzed using the Kruskal–Wallis and Mann–Whitney U tests. Results. Both masking ability and translucency differed significantly among groups ( p < 0.001 ), but only MA was different between different brands ( p < 0.001 ). Higher thicknesses showed lower translucency in all pairwise comparisons ( p < 0.001 ). 0.5 mm-thick specimens had lower masking ability than 1.5 mm- ( p = 0.016 ) and 2 mm- ( p = 0.035 ) thick ones. However, masking ability of other thickness pairs did not show a significant difference ( p > 0.05 ). G-aenial Anterior and Renamel Microfill had the highest and lowest masking ability. Bleach white shades had lower masking ability and higher translucency than extrawhite bleach shades. Conclusion. Translucency and masking ability of bleach shade composite resins differed in different thicknesses, composite resin brands, and shade groups.

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“…By breaking the spatial consistency, some highlights look like albedo changes by white paint ( Beck & Prazdny, 1981 ; Kim et al., 2011 ; Marlow et al., 2011 ; Sawayama & Nishida, 2018 ). In addition to gloss perception, translucency perception has also been widely investigated ( Fleming & Bülthoff, 2005 ; Motoyoshi, 2010 ; Gkioulekas, Xiao, Zhao, Adelson, Zickler, & Bala, 2013 ; Nagai, Ono, Tani, Koida, Kitazaki, & Nakauchi, 2013 ; Xiao et al., 2014 ; Chadwick, Cox, Smithson, & Kentridge, 2018 ; Gigilashvili, Thomas, Hardeberg, & Pedersen, 2021 ). We adopted the task of discriminating opaque from translucent objects by controlling the thickness of the translucent media ( Figure 1 , task 3).…”

Section: Introductionmentioning

confidence: 99%

Visual discrimination of optical material properties: A large-scale study

Sawayama

¹

,

Dobashi

²

,

Okabe

³

et al. 2022

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Complex visual processing involved in perceiving the object materials can be better elucidated by taking a variety of research approaches. Sharing stimulus and response data is an effective strategy to make the results of different studies directly comparable and can assist researchers with different backgrounds to jump into the field. Here, we constructed a database containing several sets of material images annotated with visual discrimination performance. We created the material images using physically based computer graphics techniques and conducted psychophysical experiments with them in both laboratory and crowdsourcing settings. The observer's task was to discriminate materials on one of six dimensions (gloss contrast, gloss distinctness of image, translucent vs. opaque, metal vs. plastic, metal vs. glass, and glossy vs. painted). The illumination consistency and object geometry were also varied. We used a nonverbal procedure (an oddity task) applicable for diverse use cases, such as cross-cultural, cross-species, clinical, or developmental studies. Results showed that the material discrimination depended on the illuminations and geometries and that the ability to discriminate the spatial consistency of specular highlights in glossiness perception showed larger individual differences than in other tasks. In addition, analysis of visual features showed that the parameters of higher order color texture statistics can partially, but not completely, explain task performance. The results obtained through crowdsourcing were highly correlated with those obtained in the laboratory, suggesting that our database can be used even when the experimental conditions are not strictly controlled in the laboratory. Several projects using our dataset are underway.

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Translucency perception: A review

Cited by 34 publications

References 135 publications

The Legacy of Willem Beurs ‒ Bridging the Gap between Art and Material Perception

The Legacy of Willem Beurs ‒ Bridging the Gap between Art and Material Perception

Masking Ability of Bleach Shade Composite Resins in Different Thicknesses

Visual discrimination of optical material properties: A large-scale study

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