The Talbot-Plateau law asserts that when the flux (light energy) of a flicker-fused stimulus
equals the flux of a steady stimulus, they will appear equal in brightness. To be perceived as …

Visual estimation of the material and shape of an object from a single image includes a hard
ill-posed computational problem. However, in our daily life we feel we can estimate both …

A fundamental problem in extracting scene structure is distinguishing different physical
sources of image structure. Light reflected by an opaque surface covaries with local surface …

Two dilemmas arise in inferring shape information from shading. First, depending on the
rendering physics, images can change significantly with (even) small changes in lighting or …

We exploit a key result from visual psychophysics---that individuals perceive shape
qualitatively---to develop the use of a geometrical/topological “invariant”(the Morse--Smale …

We re-examine the estimation of 3D shape from images that are caused by shading of
diffuse Lambertian surfaces. We propose a neural model that is motivated by the well …

We develop a linear algebraic framework for the shape-from-shading problem, because
tensors arise when scalar (eg, image) and vector (eg, surface normal) fields are …

Models for monocular shape reconstruction of surfaces with diffuse reflection--shape from
shading--ought to produce distributions of outputs, because there are fundamental …

Vision problems are inherently ambiguous: Do abrupt brightness changes correspond to
object boundaries? Are smooth intensity changes due to shading or material properties? For …

In natural conditions the human visual system can estimate the 3D shape of specular objects
even from a single image. Although previous studies suggested that the orientation field …