Generation of Torus Type Impossible Figures Based on the Shapes and Positions of Corners

Abstract

An automatic generating system of torus type impossible figures that is a subclass of multibar type impossible figures are proposed based on the shapes and positions of corners. It is shown that some impossible figures are determined only by a number of bars and a type of a link stracture, and other impossible figures are generated by knots in the knot table with a small number of bars that is achieved by the presented inequality. The proposed system aims a basic tool for experiments on visual psychology and further development of intelligent vision systems.