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

Masataka Sawayama, Yoshinori Dobashi, Makoto Okabe, Kenchi Hosokawa, Takuya Koumura, Toni Saarela, Maria Olkkonen, Shin’ya Nishida
doi: https://doi.org/10.1101/800870
Masataka Sawayama
1Inria
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  • For correspondence: masa.sawayama@gmail.com
Yoshinori Dobashi
3Hokkaido University
4Prometech CG Research
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Makoto Okabe
5Shizuoka University
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Kenchi Hosokawa
6Ritsumeikan University
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Takuya Koumura
1Inria
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Toni Saarela
7University of Helsinki
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Maria Olkkonen
8Durham University
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Shin’ya Nishida
2NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation
9Kyoto University
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Abstract

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 non-verbal 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.

Competing Interest Statement

The authors have declared no competing interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted December 14, 2021.
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Visual discrimination of optical material properties: a large-scale study
Masataka Sawayama, Yoshinori Dobashi, Makoto Okabe, Kenchi Hosokawa, Takuya Koumura, Toni Saarela, Maria Olkkonen, Shin’ya Nishida
bioRxiv 800870; doi: https://doi.org/10.1101/800870
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Visual discrimination of optical material properties: a large-scale study
Masataka Sawayama, Yoshinori Dobashi, Makoto Okabe, Kenchi Hosokawa, Takuya Koumura, Toni Saarela, Maria Olkkonen, Shin’ya Nishida
bioRxiv 800870; doi: https://doi.org/10.1101/800870

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