Limits on the estimation of shape from specular surfaces

Mazzarella, Julia; Cholewiak, Steven A.; Phillips, Flip; Fleming, Roland W.

doi:10.1167/14.10.721

Cited by 1 publication

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“…Unfortunately, the perceptual evidence to that effect is inconclusive. For example, studies by Doerschner et al (2013), Dövencioglu et al (2015), and Vota et al (2015) suggest that estimated curvature, slant, tilt, and object rotation axis are quite different for moving specular objects compared with their matte-textured counterparts (Mazzarella, Cholewiak, Phillips, & Fleming, 2014). But even if motion is taken out of the equation (Blake & Bulthoff, 1990Mazzarella et al, 2014), findings about the contribution of specular reflections to estimated 3D shape are conflicting.…”

Section: What Is the Effect Of Motion Characteristics?mentioning

confidence: 99%

“…For example, studies by Doerschner et al (2013), Dövencioglu et al (2015), and Vota et al (2015) suggest that estimated curvature, slant, tilt, and object rotation axis are quite different for moving specular objects compared with their matte-textured counterparts (Mazzarella, Cholewiak, Phillips, & Fleming, 2014). But even if motion is taken out of the equation (Blake & Bulthoff, 1990Mazzarella et al, 2014), findings about the contribution of specular reflections to estimated 3D shape are conflicting. For example, although Fleming, Torralba, and Adelson (2004) suggested that specularities aid and constrain local shape perception in images, Savarese, Fei-Fei, and Perona (2004) reported the opposite.…”

Section: What Is the Effect Of Motion Characteristics?mentioning

confidence: 99%

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Specular motion and 3D shape estimation

et al. 2017

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Dynamic visual information facilitates three-dimensional shape recognition. It is still unclear, however, whether the motion information generated by moving specularities across a surface is congruent to that available from optic flow produced by a matte-textured shape. Whereas the latter is directly linked to the first-order properties of the shape and its motion relative to the observer, the specular flow, the image flow generated by a specular object, is less sensitive to the object's motion and is tightly related to second-order properties of the shape. We therefore hypothesize that the perceived bumpiness (a perceptual attribute related to curvature magnitude) is more stable to changes in the type of motion in specular objects compared with their matte-textured counterparts. Results from two two-interval forced-choice experiments in which observers judged the perceived bumpiness of perturbed spherelike objects support this idea and provide an additional layer of evidence for the capacity of the visual system to exploit image information for shape inference.

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