1/28/2004   slide 14
Rule 4: Nearby Elements in 2D are Nearby in 3D
•“Interpret elements nearby in an image as nearby in 3D.” [Hoffman 1998 p32]
•Aka a “proximity” effect
•“As you observe the cube, note that two of the circles seem closer to you, and two further away. When the cube reverses in depth, so do the circles, suggesting that human vision assigns depth to the circles based on the depth it assigns to nearby portions of the cube.” [Hoffman 1998 p32.]
• This demonstration was devised by Marc Albert, motivated by work of Allan Jepson and Whitman Richards.
Grouping at work: things close to each other seem related. Exactly how often has to do with line configurations such as collinearity, but just marks near each other automatically seem related…