Quiz 2 Material

Question 1

What is the Panum’s fusional area?

Answer 1

The region of space behind and in front of the horopter that can still fuse stimuli to single image. (Aka. Area where binocular single vision is possible.

Question 2

How is Panum’s fusional area related to diplopia

Answer 2

The stimuli outside of Panum’s area produces diplopia

Question 3

How is Panum’s Fusional area related to crossed disparity ?

(Where does it occur?)

Answer 3

Crossed disparity occurs between area outside of Panum’s fusional area and observer

Question 4

How is Panum’s Fusional area related to uncrossed disparity ?

(Where does it occur?)

Answer 4

Uncrossed disparity -> uncrossed double images. Occurs when stimuli is outside of the Panum’s Fusional area

Question 5

How is Panum’s Fusional area related to the Horopter ?

Answer 5

The horopter is at the centre of the Panum’s fusional area.
It is the fixation plane

Question 6

How is Panum’s Fusional area related to corresponding retinal points ?

(Relative to the fixation plane)

Answer 6

• Crossed disparity (stimuli falling outside of fusional area and eyes): stimuli looks closer, stimulus falls towards ear direction on the retina in relation to the fixation plane’s retinal image points.
• Uncrossed disparity (stimuli falling outside of fusional area): stimulus looks further, falls towards nose direction on the retinal point in relation to the fixation plane’s retinal image points.

Question 7

What are the 6 techniques that have been used to created the impression of depth using binocular disparity?

Answer 7

1. Wheatstone Stereoscope (1838)
2. Brewster Stereoscope (1849)/Holmes Stereoscope (1861)
3. Rapid temporal alternation (liquid crystal shutter glasses)
4. Free fusion - crossed fusion
5. Polaroid filter
6. Anaglyph (red/cyan glasses)

Question 8

What is the difference between a stereogram and an autostereogram ?

Question 9

Draw a diagram to show how random-dot stereogram is constructed

Question 10

List 3 types of 3D TVs

Question 11

Describe how binocular disparity is created in _________

Question 12

Describe how binocular disparity is created in _________

Question 13

Describe how binocular disparity is created in _________

Question 14

What is the stereoscopic correspondence problem

Question 15

What type of stimulus is particularly difficult

Question 16

What are the 4 simplifying heuristics

Question 17

What is Diplopia

Question 18

How does the Wheatstone stereoscope create binocular disparity

Answer 18

Retinal images for right eye view and left eye view are placed in a stereoscope -> images are shown to the corresponding eye respectfully-> allows depth scene to be perceived.

Question 19

What did the Wheatstone experiments prove

Answer 19

Proved that Binocular disparity is a depth cue

Question 20

Example of a Wheatstone stereoscope experiment

Answer 20

• When the intended stimulus was closer to the middle, the stimulus appeared to be in front of the background (synonymous with retinal points of stimulus that gives crossed disparity)
• Vice versa

Question 21

How did a Brewster/Holmes stereoscope create binocular disparity

Question 22

What is Free Fusion

Answer 22

Technique to view a stereogram without a stereoscope

Question 23

What is cross fusing and how does it create depth from binocular disparity?

Answer 23

Crossed fusing = crossed disparity.

• hold fingers between nose and picture, converge eyes on finger, accommodate to picture.
• right picture -> falls on left fovea
• left picture -> falls on right fovea

Question 24

What is