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Advances in Visual Perception PSYC 526 Fall Profs. Fred Kingdom & Kathy Mullen

Advances in Visual Perception PSYC 526 Fall Profs. Fred Kingdom & Kathy Mullen. Lecture 3 “Seeing Objects” Readings Goldstein, 5th ed: Ch. 7; 6th, 7th ed: Ch. 5. Bruce et al., "Visual Object Recognition" Ch. 9 in Visual Perception. Hove: UK. (1996), WebCT.

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Advances in Visual Perception PSYC 526 Fall Profs. Fred Kingdom & Kathy Mullen

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  1. Advances in Visual Perception PSYC 526 Fall Profs. Fred Kingdom & Kathy Mullen

  2. Lecture 3 “Seeing Objects” Readings Goldstein, 5th ed: Ch. 7; 6th, 7th ed: Ch. 5. Bruce et al., "Visual Object Recognition" Ch. 9 in Visual Perception. Hove: UK. (1996), WebCT. Tovee "Object perception and recognition" Ch 8 in An Introduction to the Visual System, Cambridge University Press (1996), WebCT.

  3. Edges in cave paintings

  4. Cartoon drawings

  5. Children’s drawings

  6. ‘Two-tone’ image High-pass filtered

  7. ‘Two-tone’ image High-pass filtered

  8. Effects of bandpass filtering Unfiltered Lowpass filtered Highpass filtered

  9. Zero-crossings in filter output

  10. Zero-crossings at different scales

  11. ‘Blocked’ image

  12. ‘Blocked’ images & zero crossings

  13. Seeing contours

  14. Straightish path Curvy path Field, Hayes & Hess (1993)

  15. Common fate Courtesy of Tony Movshon, New York University

  16. Symmetry

  17. Visual completion

  18. Ambiguous figure

  19. Salvador Dali

  20. Penrose staircase

  21. Escher

  22. Spatial frequency (SF)

  23. ‘Light-comes-from-above’ assumption

  24. Colour shading effect

  25. Courtesy of Dan Kersten, University of Minesota

  26. Courtesy of Dan Kersten, University of Minesota

  27. Kanizsa triangle

  28. Muller-Lyre illusion

  29. Muller-Lyre illusion

  30. Gregory’s explanation

  31. Illusions of perceived size

  32. Zollner illusion

  33. “Prior knowledge and/or top-down processing ?” Gestalt law of good continuation The motion after-effect The ‘light-comes-from-above’ assumption Colours of the rainbow Orientation-selective neurons in the cortex Illusory contours, as in the Kanizsa triangle Mirror-symmetry ‘pops-out’ Insensitivity of cortical neurons to uniform illumination 9. Common fate

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