Sensory representation of surface reflectances: assessments with hyperspectral images
Sensory representation of surface reflectances: assessments with hyperspectral images
Specifying surface reflectances in a simple and perceptually informative way would be beneficial for many areas of research and application. We assessed whether a 3×3 matrix may be used to approximate how a surface reflectance modulates the sensory color signal across illuminants. We tested whether observers could discriminate between the model's approximate and accurate spectral renderings of hyperspectral images under narrowband and naturalistic, broadband illuminants for eight hue directions. Discriminating the approximate from the spectral rendering was possible with narrowband, but almost never with broadband illuminants. These results suggest that our model specifies the sensory information of reflectances across naturalistic illuminants with high fidelity, and with lower computational cost than spectral rendering.
A183-A189
Karimipour, Hamed
f712f196-cee9-4f9f-bd4e-1621200d5979
O'Regan, J. Kevin
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Witzel, Christoph
dfb994f1-7007-441a-9e1a-ddb167f44166
23 February 2023
Karimipour, Hamed
f712f196-cee9-4f9f-bd4e-1621200d5979
O'Regan, J. Kevin
b3e69197-6bac-44c1-9398-ea173fdf11ec
Witzel, Christoph
dfb994f1-7007-441a-9e1a-ddb167f44166
Karimipour, Hamed, O'Regan, J. Kevin and Witzel, Christoph
(2023)
Sensory representation of surface reflectances: assessments with hyperspectral images.
Journal of the Optical Society of America A: Optics and Image Science, and Vision, 40 (3), .
(doi:10.1364/JOSAA.477276).
Abstract
Specifying surface reflectances in a simple and perceptually informative way would be beneficial for many areas of research and application. We assessed whether a 3×3 matrix may be used to approximate how a surface reflectance modulates the sensory color signal across illuminants. We tested whether observers could discriminate between the model's approximate and accurate spectral renderings of hyperspectral images under narrowband and naturalistic, broadband illuminants for eight hue directions. Discriminating the approximate from the spectral rendering was possible with narrowband, but almost never with broadband illuminants. These results suggest that our model specifies the sensory information of reflectances across naturalistic illuminants with high fidelity, and with lower computational cost than spectral rendering.
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josaa-40-3-a183
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Accepted/In Press date: 13 February 2023
Published date: 23 February 2023
Additional Information:
Funding Information:
Mayflower Scholarship, School of Psychology, University of Southampton.
Identifiers
Local EPrints ID: 477015
URI: http://eprints.soton.ac.uk/id/eprint/477015
ISSN: 1084-7529
PURE UUID: 6e0bb164-af2b-4fc2-85af-7683841f8456
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Date deposited: 23 May 2023 16:48
Last modified: 17 Mar 2024 04:00
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Contributors
Author:
Hamed Karimipour
Author:
J. Kevin O'Regan
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