The perception of a three-dimensional (3-D) surface shape can be inferred from a 2-D image
of two intersecting curves. Three experiments are reported in which we examined a possible …

We investigated the geometric representations underlying the perception of 2-D contour
curvature. 88 arcs representing lower and upper halves of concentric circles, or halves of …

Describes practical solutions to a number of computational problems that arise when
studying the perception of curved surfaces. Procedures are described for (1) representing a …

This research was designed to examine how human observers are able to perceive the 3-
dimensional structure of smoothly curved surfaces from projected patterns of surface …

Abstract Investigated 3 gradients—perspective, compression, and density—and the
phenomenal impression of flat and curved surfaces. In Exp I, 10 Ss (including the authors) …

A new computational analysis is described that is capable of estimating the 3D shapes of
continuously curved surfaces with anisotropic textures that are viewed with negligible …

Simultaneous contrast effects have been found across a wide range of visual dimensions.
We describe a simultaneous contrast effect—three-dimensional curvature contrast—in which …

Shapes on picture surfaces are not seen accurately (Arnheim, 1954). In particular, if they
depict 3-D forms, angles between lines on a picture surface are misperceived. To test four …

People can perceive 3D information from contour drawings and some types of
configurations of contours in such drawings are important for 3D perception. We know that …

A series of four experiments was designed to investigate the minimal amounts of information
required to perceive the structure of a smoothly curved surface from its pattern of projected …