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The role of contours in form-based motion processing

The role of contours in form-based motion processing. P.U. Tse, G. P. Caplovitz, and P.-J. Hsieh. Form from motion or Structure from motion. Form from motion Motion from form. Form from motion Motion from form. Transformational Apparent Motion. Form from motion Motion from form.

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The role of contours in form-based motion processing

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  1. The role of contours in form-based motion processing P.U. Tse, G. P. Caplovitz, and P.-J. Hsieh

  2. Form from motion orStructure from motion

  3. Form from motionMotion from form

  4. Form from motionMotion from form • Transformational Apparent Motion

  5. Form from motionMotion from form • Transformational Apparent Motion • Trackable features: Object shape can influence how fast it is perceived to rotate

  6. Form from motionMotion from form • Transformational Apparent Motion • Trackable features: Object shape can influence how fast it is perceived to rotate • Emergent motion signals

  7. Overview of talk • Theoretical background to contour discontinuities • The role of contour discontinuities in form/motion processing • Transformational apparent motion • Motion from feature tracking • Emergent motion signals

  8. Overview of talk • Theoretical background to contour discontinuities • The role of contour discontinuities in form/motion processing • Transformational apparent motion • Motion from feature tracking • Emergent motion signals

  9. Contour discontinuities • What are they? • Why are they important?

  10. Attneave, 1954

  11. Attneave, 1954

  12. Attneave, 1954

  13. Attneave, 1954

  14. Attneave, 1954

  15. Attneave, 1954

  16. Biederman, 1987

  17. Biederman, 1987

  18. Biederman, 1987

  19. Curvature detectors

  20. Curvature detectors ( Wolfe, Yee & Friedman-Hill (1992).

  21. ( ( ( ( ( ( ( ( Curvature detectors ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( Wolfe, Yee & Friedman-Hill (1992).

  22. ( ( ( ( ( ( ( ( Curvature detectors There exist filters tuned to curvature ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( Wolfe, Yee & Friedman-Hill (1992).

  23. Curvature as a cue to 3D shape Tse, 2002, Psych. Review

  24. Theory: The visual system locates points of contour curvature discontinuity in order to generate shape-from-contours Tse (2002, Psych. Review)

  25. Caveat: much more is going on in shape formation

  26. Caveat: much more is going on in shape formation

  27. Caveat: much more is going on in shape formation

  28. Caveat: much more is going on in shape formation

  29. Curvature as a cue to 3D shape

  30. Curvature as a cue to 3D shape

  31. Curvature as a cue to 3D shape

  32. Curvature as a cue to 3D shape

  33. Curvature as a cue to 3D shape

  34. Curvature discontinuities pop out Kristjansson & Tse, 2001, P&P

  35. Curvature discontinuities pop out Kristjansson & Tse, 2001, P&P

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