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Psyc2320

Psyc2320. Midterm II Review. Physiological Depth Cues. Accommodation. Physiological Depth Cues. Convergence. Large angle of convergence. Small angle of convergence. crossed convergence. uncrossed convergence. Binocular disparity. FIXATION POINT. HOROPTER.

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Psyc2320

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  1. Psyc2320 Midterm II Review

  2. Physiological Depth Cues • Accommodation

  3. Physiological Depth Cues • Convergence

  4. Large angle of convergence Small angle of convergence crossed convergence uncrossed convergence

  5. Binocular disparity FIXATION POINT HOROPTER Anything closer than the fixation point is in a crossed disparity

  6. Binocular disparity Anything farther away than the fixation point is in an uncrossed disparity FIXATION POINT HOROPTER

  7. Autostereograms Any repeating objects that have a spacing different from the background will have either crossed or uncrossed disparity RIGHT EYE LEFT EYE If you uncross convergence, your right eye gets these faces shifted slightly to left, left eye gets them shifted to right = CROSSED DISPARITY

  8. Autostereograms Any repeating objects that have a spacing difference from the background will have either crossed or uncrossed disparity RIGHT EYE LEFT EYE If you uncross convergence, right eye gets these faces shifted slightly to right, left eye gets them shifted to left = UNCROSSED DISPARITY

  9. Question 1 What is the difference between a stereogram and an autostereogram? In a stereogram there is a plate in-between the viewers eyes, forcing him into uncrossed convergence In an autostereogram there is no external aid to help the viewer in to uncrossed convergence; the viewer has to disconnect the accommodation/convergence reflexes

  10. Question 2 What is parallax? Points at different locations in the visual field move at different speeds depending on their distance from fixation

  11. Question 3 Fill in: Crossed convergence shifts right eye’s image slightly to the _______ and the left eye’s image slightly to the _______ LEFT RIGHT

  12. Autostereograms Crossed convergence shifts right image to the right of the left image and vice versa: Left Eye’s Image Right Eye’s Image

  13. Autostereograms Crossed convergence shifts right image to the right of the left image and vice versa: Left Eye’s Image Right Eye’s Image

  14. Autostereograms Crossed convergence shifts right image to the right of the left image and vice versa: Left Eye’s Image Right Eye’s Image

  15. Question 3 Fill in: Crossed convergence shifts right eye’s image slightly to the _______ and the left eye’s image slightly to the _______ Uncrossed convergence shifts right eye’s image to the ______ of the _____ eye and vice versa LEFT RIGHT LEFT LEFT

  16. Autostereograms Uncrossed convergence shifts right-eye’s image to the left of the left-eye image and vice versa: Left Eye Right Eye

  17. Autostereograms Uncrossed convergence shifts right-eye’s image to the left of the left-eye image and vice versa: Left Eye Right Eye

  18. Autostereograms Uncrossed convergence shifts right-eye’s image to the left of the left-eye image and vice versa: Left Eye Right Eye

  19. Question 4 Which is correct? Head is accelerated in the direction of the blue arrow Head is accelerated in the direction of the red arrow Cupula

  20. Question 4 Which is correct? Head is accelerated in the direction of the blue arrow Head is accelerated in the direction of the red arrow Fluid goes this way Head accelerates this way Cupula

  21. Question 5 • Where on the tongue is the taste receptor for ‘bitter’ located? Distributed evenly across the tongue surface with the exception of on the filiform region

  22. Question 6 Which perception is associated with these physical properties of light? Intensity Brightness Frequency Color Not sensed by humans Polarization

  23. Question 7 What happens when we move the reference lap...

  24. Question 7 What happens when we move the reference lap... ....here???

  25. Question 7 The viewer will perceive the light coming from the lamp as being moved further back in a 3D image

  26. Question 8 What do you get if you use a prism to combine all wavelengths of light? WHY? WHITE All the wavelengths are added together. When they are all reflected at the same time, you see white What do you get if you mix a bunch of light? WHY? BLACK The pigment in paint SUBTRACTS the different wavelengths – with enough pigments mixed, all the wavelengths are ‘absorbed’ and you see it as black

  27. Question 9 How do we see color in a dim setting?

  28. Question 9 How do we see color in a dim setting? a) We perceive color not based on absolute wavelengths, but based on the wavelengths available to us

  29. Question 9 How do we see color under different illumination conditions? b) COLOR CONSTANCY The ‘color’ of objects is independent of the ambient light. The color of an object is perceived as the same under different lighting conditions to aid in object recognition and identification

  30. Question 10 What is size constancy? Perceived size of an object is adjusted according to perceived distance (based on other cues)

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