منابع مشابه
Depth discrimination from shading under diffuse lighting.
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 perception have assumed that surface irradiance varies with the angle between the local surface normal and a collimated light source. This model holds, for example, on a sunny day. One common situation in which this model f...
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A set of animated stimuli (Lissajous figures), each element of which is physically consistent with two different three-dimensional shapes undergoing rigid rotations about orthogonal axes, is described. Human observers typically show a preference for one shape or the other; this preference may be biased by manipulating various parameters of the stimulus. Fairly good predictions of which shape wi...
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Adults show better memory for ambiguous faces of their own race than for ambiguous faces of another race, even when the faces are identical and differentiated only by extraneous cues to racial category. We investigated whether similar context effects operate early in development. Young children raised in predominantly White environments were presented with computer-generated White-Black morphed...
متن کاملShape from Shading using Color Segmentation Based Depth Adjustment
In order to create a good 3D reconstruction from an image, shape information of the object of interest is needed. One way to acquire it is based on the shading information. This can be solved using the Shape from Shading method. Unfortunately this method has some drawbacks, namely the depth ambiguity problems. Two points which have the same intensity will have the same depth, although in realit...
متن کاملDepth Structure from Asymmetric Shading Supports Face Discrimination
To examine the effect of illumination direction on the ability of observers to discriminate between faces, we manipulated the direction of illumination on scanned 3D face models. In order to dissociate the surface reflectance and illumination components of front-view face images, we introduce a symmetry algorithm that can separate the symmetric and asymmetric components of the face in both low ...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2019
ISSN: 1534-7362
DOI: 10.1167/19.8.112