- Title Pages
- How to Use the Website
- Chapter 11 Weighted Positional Averaging in the Illusions of the Müller-Lyer Type
- Chapter 12 The Bar-Cross-Ellipse Illusion
- Chapter 13 The Spinning Ellipse Speed Illusion
- Chapter 14 The Ames Window Illusion and Its Variations
- Chapter 15 Three-Dimensional Müller-Lyer Illusion
- Chapter 16 Why Do Hills Look So Steep?
- Chapter 17 “Shape From Smear”
- Chapter 18 Geometric-Optical Illusions Under Isoluminance?
- Chapter 19 The Picture Surface Illusion
- Chapter 20 Cast Shadow Illusions
- Chapter 21 The Leaning Tower Illusion
- Chapter 22 The Invisible Saddle, or the Cap-or-Cup Illusion
- Chapter 23 Symmetry and Uprightness in Visually Perceived Forms
- Chapter 24 The Bathtub Illusion
- Chapter 25 The Pitchroom Illusion
- Chapter 26 Geometric Illusions in the Human Face and Body
- Chapter 27 Dynamic Illusory Size Contrast
- Chapter 28 Size Contrast and Assimilation in the Delboeuf and Ebbinghaus Illusions
- Chapter 29 The Occlusion, Configural Shape, and Shrinkage Illusions
- Chapter 30 Reverse-Perspective Art and Objects—Illusions in Depth and Motion
- Chapter 31 The <i>New</i> Moon Illusion
- Chapter 32 Geometrical Errors Are the Cost of Maintaining the Luminance Contrast Polarity
- Chapter 33 Antigravity Slopes
- Chapter 34 The Geometric-Optical Illusions of J. J. Oppel
- Chapter 35 The Oppel–Kundt Illusion
- Chapter 36 The Shifted-Chessboard Pattern as Paradigm of the Exegesis of Geometrical-Optical Illusions
Cast Shadow Illusions
Cast Shadow Illusions
- (p.214) Chapter 20 Cast Shadow Illusions
- The Oxford Compendium of Visual Illusions
- Oxford University Press
Cast shadows are present in almost every scene we view, yet very little is known about how the brain processes them. On the one hand, shadows can interfere with the visual ability to recognize objects, while on the other hand, they provide critical information for where objects are in a scene. Because shadows can provide compelling cues for location in depth, these cues can overcome other competing sources of information, resulting in illusions. By studying shadow illusions, one can gain insight into the built-in assumptions the brain has about the nature of illumination and its interaction with the surfaces we view each day.
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