Perceptual constancy refers to the fact that the perceived geometrical and physical
characteristics of objects remain constant despite transformations of the objects such as rigid …

Rectangularity and perpendicularity of contours are important properties of 3D shape for the
visual system and the visual system can use them as a priori constraints for perceiving …

Detecting 3D symmetry is important for the human visual system because many objects in
our everyday life are 3D symmetrical. Many are 3D mirror-symmetrical and others are 3D …

Human subjects were tested in perception of shapes of 3D objects. The subjects
reconstructed 3D shapes by viewing orthographic and perspective images. Perception of …

Symmetry in biological and physical systems is a product of self-organization driven by
evolutionary processes, or mechanical systems under constraints. Symmetry-based feature …

Two shape matching experiments examined the effects of viewing distance and object size
on observers' judgments of 3D metric shape under binocular viewing. Unlike previous …

A Coons patch is characterized by a finite set of boundary curves, which are dependent on
the choice of blending functions. For a bicubically blended Coons patch (BBCP), the Hermite …

Abstract Yu, Todd, and Petrov (2021, Journal of Vision) and their follow-up study (Yu, Petrov,
& Todd, 2021, i-Perception) aimed at evaluating the role of three-dimensional (3D) symmetry …

A single experiment is reported that measured the apparent stereoscopic shapes of
symmetric and asymmetric objects at different viewing distances. The symmetric stimuli were …

The generalized cone is a simple 3D shape that is produced by sweeping a planar cross-
section along a curve. Many complex and articulated 3D objects can be represented by …