Related Experiment Video
Updated: Oct 10, 2025

Generating Strictly Controlled Stimuli for Figure Recognition Experiments
Published on: March 18, 2019
Geometric Constraints of Visual Space
1Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, the Netherlands.
Abstract:
Perspective space has been introduced as a computational model of visual space. The model is based on geometric features of visual space. The model has proven to describe a range of phenomena related to the visual perception of distance and size. Until now, the model lacks a mathematical description that holds for complete 3D space. Starting from a previously derived equation for perceived distance in the viewing direction, the suitability of various functions is analyzed. Functions must fulfill the requirement that straight lines, oriented in whatever direction in physical space, transfer to straight lines in visual space. A second requirement is that parallel lines oriented in depth in physical space, converge to a finite vanishing point in visual space. A rational function for perceived distance, compatible with the perspective-space model of visual space, satisfies the requirements. The function is unique. Analysis of alternative functions shows there is little tolerance for deviations. Conservation of the straightness of lines constrains visual space to having a single geometry. Visual space is described by an analytical function having one free parameter, that is, the distance of the vanishing point.
More Related Videos
Related Concept Videos
Depth Perception and Spatial Vision
Gestalt Principles of Perception
Gauss's Law: Planar Symmetry
Space Trusses: Problem Solving
Consider a tripod consisting of a tetrahedral space truss with a ball-and-socket joint at C. Suppose the height and lengths of the horizontal and vertical...
Space Trusses
At the core of a space truss lies the fundamental unit known as the tetrahedron. This structure is composed of six members that form a three-dimensional shape...
Sight Distance in a Vertical Curve

