Foveal to peripheral extrapolation of brightness within objects
Authors: Toscani, M., Gegenfurtner, K.R. and Valsecchi, M.
Journal: Journal of Vision
Volume: 17
Issue: 9
eISSN: 1534-7362
DOI: 10.1167/17.9.14
Abstract:Peripheral viewing is characterized by poor resolution and distortions as compared to central viewing; nevertheless, when we move our gaze around, the visual scene does not appear to change. One possible mechanism leading to perceptual uniformity would be that peripheral appearance is extrapolated based on foveal information. Here we investigate foveal-toperipheral extrapolation in the case of the perceived brightness of an object's surface. While fixating a spot on the rendered object, observers were asked to adjust the brightness of a disc to match a peripherally viewed target area on the surface of the same object. Being forced to fixate a better illuminated point led to brighter matches as compared to fixating points in the shadow, indicating that foveal brightness information was extrapolated. When observers fixated additional points outside of the object on the scene's background, fixated brightness had no effect on the brightness match. Results indicate that our visual system uses the brightness of the foveally viewed surface area to estimate the brightness of areas in the periphery. However, this mechanism is selectively applied within an object's boundary.
Source: Scopus
Foveal to peripheral extrapolation of brightness within objects.
Authors: Toscani, M., Gegenfurtner, K.R. and Valsecchi, M.
Journal: J Vis
Volume: 17
Issue: 9
Pages: 14
eISSN: 1534-7362
DOI: 10.1167/17.9.14
Abstract:Peripheral viewing is characterized by poor resolution and distortions as compared to central viewing; nevertheless, when we move our gaze around, the visual scene does not appear to change. One possible mechanism leading to perceptual uniformity would be that peripheral appearance is extrapolated based on foveal information. Here we investigate foveal-to-peripheral extrapolation in the case of the perceived brightness of an object's surface. While fixating a spot on the rendered object, observers were asked to adjust the brightness of a disc to match a peripherally viewed target area on the surface of the same object. Being forced to fixate a better illuminated point led to brighter matches as compared to fixating points in the shadow, indicating that foveal brightness information was extrapolated. When observers fixated additional points outside of the object on the scene's background, fixated brightness had no effect on the brightness match. Results indicate that our visual system uses the brightness of the foveally viewed surface area to estimate the brightness of areas in the periphery. However, this mechanism is selectively applied within an object's boundary.
Source: PubMed
Foveal to peripheral extrapolation of brightness within objects
Authors: Toscani, M., Gegenfurtner, K.R. and Valsecchi, M.
Journal: JOURNAL OF VISION
Volume: 17
Issue: 9
ISSN: 1534-7362
DOI: 10.1167/17.9.14
Source: Web of Science (Lite)
Foveal to peripheral extrapolation of brightness within objects.
Authors: Toscani, M., Gegenfurtner, K.R. and Valsecchi, M.
Journal: Journal of vision
Volume: 17
Issue: 9
Pages: 14
eISSN: 1534-7362
ISSN: 1534-7362
DOI: 10.1167/17.9.14
Abstract:Peripheral viewing is characterized by poor resolution and distortions as compared to central viewing; nevertheless, when we move our gaze around, the visual scene does not appear to change. One possible mechanism leading to perceptual uniformity would be that peripheral appearance is extrapolated based on foveal information. Here we investigate foveal-to-peripheral extrapolation in the case of the perceived brightness of an object's surface. While fixating a spot on the rendered object, observers were asked to adjust the brightness of a disc to match a peripherally viewed target area on the surface of the same object. Being forced to fixate a better illuminated point led to brighter matches as compared to fixating points in the shadow, indicating that foveal brightness information was extrapolated. When observers fixated additional points outside of the object on the scene's background, fixated brightness had no effect on the brightness match. Results indicate that our visual system uses the brightness of the foveally viewed surface area to estimate the brightness of areas in the periphery. However, this mechanism is selectively applied within an object's boundary.
Source: Europe PubMed Central