Additional Slides for Chapter 4: Monocular and Binocular Cues NOTE! When you print these, I have included my notes so you can have them. Instead of printing.

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Presentation transcript:

Additional Slides for Chapter 4: Monocular and Binocular Cues NOTE! When you print these, I have included my notes so you can have them. Instead of printing “handouts”, print “notes pages” and you will get the slide and my notes! VERY HELPFUL!! See picture to the right to see how to print these!

How do we perceive depth? Monocular Cues – *Depth cues that do not depend on having two eyes *Think Artist’s Drawings! *Only one (mono) eye is required to process depth or distance cues. Linear Perspective (railroad tracks in Ponzo illusion) Relative Size Cues Texture Gradient/Aerial Perspective Interposition Motion Parallax Copyright © Allyn and Bacon 2006

Linear Perspective – Parallel lines appear to converge toward a vanishing point as they recede in the distance; we don’t need two eyes for this! B A Which box is bigger, A or B?

Relative Size Cues Copyright © Allyn and Bacon 2006

Texture Gradient/Aerial Perspective – the more you can see the texture, the closer it is Copyright © Allyn and Bacon 2006

Interposition – Think position of the object Copyright © Allyn and Bacon 2006

Motion Parallax Copyright © Allyn and Bacon 2006

How do we perceive depth? Convergence – as object moves closer to our noses our eyes turn inward and “cross.” Retinal Disparity – (hold finger far away from face and close one eye and then close the other) If an object is far away, the image will be similar, the closer it is, the more disparity there will be. Binocular Cues – Depth cues that depend on having both eyes. This gives us accurate depth perception! Information is processed by each eye and fused to form one image. Copyright © Allyn and Bacon 2006

How do we perceive motion? Stroboscopic Effect (a movie or flip book) Phi Phenomenon (dancing Christmas lights or a baseball scoreboard that displays fireworks after a homerun is hit – lights are just turning on and off) Autokinetic Effect – In a darkened room, if there is a stationary point of light, the light will appear to move if you stare at it. Visual Capture – When sitting at a traffic light and cars around you move forward, and you feel like your car is moving backward. Copyright © Allyn and Bacon 2006