Reference no: EM132371237

Assignment: Vision and Art

Perception involves knowledge about physics, geometry, and light

Last week, we discussed how we use our knowledge of objects and scenes to interpret what we see. This week, we'll continue to explore the role of knowledge in vision. This time we'll focus on how we apply our knowledge of light and geometry to interpret what we see.

Part 1- response arounds 300 words

When we recognize and interpret any scene, we make certain assumptions. These assumptions are based on our knowledge of the world gleaned from previous experiences. Generally, we aren't aware of these assumptions because they are almost always correct. They are correct because visual world is a pretty predictable place. The best way to reveal these assumptions is to concoct an unnatural situation in which they fail. See if you can figure out why these videos are so surprising. In your post, focus on one video or one aspect of one video. (The last video is especially challenging. Despite the name, no magnets are involved. There's an explanation here, but it's probably easier to study the video.)

1. Assumptions (By Quirkology)

2. Amazing Anamorphic Illusions! (By brusspup)

3. Impossible motion: magnet-like slopes (By The Illusion contest)

Part 2- Check point Q 1-3 (Please answer one by one, don't answer together in the one paragraph)

On the left we see an impossibly small woman sitting on a chair. This is an illusion. On the right, we see the same scene from a different angle.

1. Explain how the scene was constructed to create the illusion.

2. What assumption are we making when we perceive the illusion. (Refer back to the background material and find a specific assumption.)

3. Once you understand how the illusion is created, why can't you perceive the image on the left correctly? (Why does the illusion persist even when you know what's going on?)