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Unveiling Visual Perception: The Art of Edges and Shadows

Explore the nuances of visual perception through edges and shadows, understanding concepts like subjective contours and shadow letters. Delve into the importance of adhering to rules of inversion to enhance interpretation. Discover how depth cues and perspective play vital roles in shaping our understanding of visual stimuli. Unravel the mysteries of shadows, perspective, and depth perception in this insightful exploration.

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Unveiling Visual Perception: The Art of Edges and Shadows

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Presentation Transcript

  1. Let’s magnify the critical bit.

  2. Edges are important

  3. Inferring edges Subjective contours

  4. Read me…...

  5. Shadow letters are surprisingly easy to read.

  6. Minimal shadow can give you faces http://www.techfak.uni-bielefeld.de/ags/ni/projects/cognitivrobot/eyetrack/eye_concept.html

  7. If you obey the rules inversion http://www.techfak.uni-bielefeld.de/ags/ni/projects/cognitivrobot/eyetrack/eye_concept.html

  8. What is the problem here? http://www.techfak.uni-bielefeld.de/ags/ni/projects/cognitivrobot/eyetrack/eye_concept.html

  9. Weird color is no problem But shadow must be darker http://www.techfak.uni-bielefeld.de/ags/ni/projects/cognitivrobot/eyetrack/eye_concept.html

  10. WHAT IS THIS?

  11. Does this seem likely?

  12. This seems more likely “Good continuation”

  13. Depth Cues From 2D-3D

  14. Occlusion

  15. Is this likely?

  16. Size

  17. Texture

  18. Relative position (height in field)

  19. Here is why it works

  20. You don’t need to recognize the objects

  21. Areal Perspective (haze) The misty mountains far away

  22. Linear Perspective Vanishing point

  23. Linear Perspective? Where is the vanishing point?

  24. Linear Perspective? These local bits don’t add up

  25. Linear Perspective? These add up…ambiguously

  26. Shadows But where is the sun?

  27. And let’s not forget Stereopsis, Vergence, and Motion parallax

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