The perception of shading-defined form results from an interaction between shading cues
and the frames of reference within which those cues are interpreted. In the absence of a …

In theory, global shading may help with the estimation of local surface structurefrom shading
(eg, in specifying the illuminant direction). Empirically, we do not know whether human …

The human visual system has a remarkable ability to interpret smooth patterns of light on a
surface in terms of 3-D surface geometry. Classical studies of shape-from-shading …

Theoretically, metric solid shape is not determined uniquely by shading. Consequently,
human vision has difficulty in categorizing shape when shading is the only cue. In the …

The extraction of three-dimensional shape from shading is one of the most perceptually
compelling, yet poorly understood, aspects of visual perception. In this paper, we report …

Recent growth in the shape-from-shading psychophysics literature has been paralleled by
an increasing availability of computer graphics hardware and software, to the extent that …

The perception of shape from shading (SFS) has been an active research topic for more
than two decades, yet its quantitative description remains poorly specified. One obstacle is …

The human visual system makes effective use of shading alone in recovering the shape of
objects. Pictures of sculptures are readily interpreted—a situation where shading provides …

People readily perceive smooth luminance variations as being due to the shading produced
by undulations of a 3-D surface (shape-from-shading). In doing so, the visual system must …

The visual system exploits prior knowledge on the world to disambiguate a scene. In
particular, the inference of shape-from-shading relies on the fact that light comes from above …