Figure 1: Three examples of input 3D mesh and tactile saliency map (two views each) computed by our approach. Left: "Grasp" saliency map of a mug model. Middle: "Press" saliency map of a game controller model. Right: "Touch" saliency map of a statue model. The blue to red colors (jet colormap) correspond to relative saliency values where red is most salient.
A new numerical method has been developed for studying the static deformation of an acoustically levitated liquid drop in air. After the Fourier transformation is applied to the original integral form of the Helmholtz formula for the scattering of an axisymmetric acoustic wave by an incompressible liquid drop, solutions which are valid for all degrees of axisymmetric deformation up to the point of drop break-up are obtained. Calculations are presented for drops in both gravity and gravity-free environments, and are found to be in good agreement with experimental measurements by others. A physical picture of the competing processes introduced by drop deformation in a sound field is also presented. The predictions for the 1g case can be applied to ground-based experiments in which surface properties of acoustically levitated drops are being measured.
This study investigates the potential impact of subsurface light transport on gloss perception for the purposes of broadening our understanding of visual appearance in computer graphics applications. Gloss is an important attribute for characterizing material appearance. We hypothesize that subsurface scattering of light impacts the glossiness perception. However, gloss has been traditionally studied as a surface-related quality and the findings in the state-of-the-art are usually based on fully opaque materials, although the visual cues of glossiness can be impacted by light transmission as well. To address this gap and to test our hypothesis, we conducted psychophysical experiments and found that subjects are able to tell the difference in terms of gloss between stimuli that differ in subsurface light transport but have identical surface qualities and object shape. This gives us a clear indication that subsurface light transport contributes to a glossy appearance. Furthermore, we conducted additional experiments and found that the contribution of subsurface scattering to gloss varies across different shapes and levels of surface roughness. We argue that future research on gloss should include transparent and translucent media and to extend the perceptual models currently limited to surface scattering to more general ones inclusive of subsurface light transport.
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