Depth Cues Versus the Simplicity Principle in 3D Shape Perception
Article first published online: 4 AUG 2011
Copyright © 2011 Cognitive Science Society, Inc.
Topics in Cognitive Science
Volume 3, Issue 4, pages 667–685, October 2011
How to Cite
Li, Y. and Pizlo, Z. (2011), Depth Cues Versus the Simplicity Principle in 3D Shape Perception. Topics in Cognitive Science, 3: 667–685. doi: 10.1111/j.1756-8765.2011.01155.x
- Issue published online: 11 OCT 2011
- Article first published online: 4 AUG 2011
- Received 6 January 2010; received in revised form 24 January 2011; accepted 4 February 2011
- 3D shape perception;
- Depth cues;
- Simplicity constraints
Two experiments were performed to explore the mechanisms of human 3D shape perception. In Experiment 1, the subjects’ performance in a shape constancy task in the presence of several cues (edges, binocular disparity, shading and texture) was tested. The results show that edges and binocular disparity, but not shading or texture, are important in 3D shape perception. Experiment 2 tested the effect of several simplicity constraints, such as symmetry and planarity on subjects’ performance in a shape constancy task. The 3D shapes were represented by edges or vertices only. The results show that performance with or without binocular disparity is at chance level, unless the 3D shape is symmetric and/or its faces are planar. In both experiments, there was a correlation between the subjects’ performance with and without binocular disparity. Our study suggests that simplicity constraints, not depth cues, play the primary role in both monocular and binocular 3D shape perception. These results are consistent with our computational model of 3D shape recovery.