PS 222 Exam 3questions with the only updated correct
answers
1.how does the visual system achieve depth from retinal disparity?:
corre- sponding points
2.corresponding points:: zero disparity; fall on the same position of the
two retinae relative to fixation
3.non-corresponding points:: exhibit disparity; anything inside or
outside of horopter falls on noncorresponding points on two retinae.
4.corresponding points do, but non-corresponding points do not fall on::
the horopter
5.three types of retinal disparity:: 1. zero disparity
2.crossed disparity: objects nearer the fixation point:
3.uncrossed disparity: objects further from the fixation point
6.magnitude of disparity:: the distance between the images of the
object on the two retinae
7.distance of object from horopter + disparity: The farther the object
from the horopter, the greater the disparity between its images on the
two retinae
8.angular disparity:: difference between the 2 retinal locations that the
image falls on
9.how to calculate angular disparity:: D = angle(r) - angle(l)
10.random dot stereogram: a pair of stereoscopic images of random
made up dots. when one section of this pattern is shifted n, the
resulting
slightly in one directio disparity causes the shifted section to
appear above or below the rest when the patterns are
viewed in a stereoscope.
11.stereograms let us:: control which info goes into each eye
12.how anaglyphs (red+cyan 3D) are made:: 1. 2 pictures side by side
2.align & crop
3.apply filters to each picture
4.combine
13. two options of the correspondence problem:: 1. visual system does
2D object recognition for each retina, "labeling" each object in the
scene. visual system then assesses disparity for each object
2. visual system matches parts of the retinal image based on very simpl
properties, such as color, orientation, spatial frequency.
14.stereograms prove:: we don't need objects to see depth
15.two assumptions made by the brain in trying to solve the
1/
12
, PS 222 Exam 3questions with the only updated correct
answers
correspondence problem:: 1. each feature in one retinal image will match
only one feature in the other
2/
12
answers
1.how does the visual system achieve depth from retinal disparity?:
corre- sponding points
2.corresponding points:: zero disparity; fall on the same position of the
two retinae relative to fixation
3.non-corresponding points:: exhibit disparity; anything inside or
outside of horopter falls on noncorresponding points on two retinae.
4.corresponding points do, but non-corresponding points do not fall on::
the horopter
5.three types of retinal disparity:: 1. zero disparity
2.crossed disparity: objects nearer the fixation point:
3.uncrossed disparity: objects further from the fixation point
6.magnitude of disparity:: the distance between the images of the
object on the two retinae
7.distance of object from horopter + disparity: The farther the object
from the horopter, the greater the disparity between its images on the
two retinae
8.angular disparity:: difference between the 2 retinal locations that the
image falls on
9.how to calculate angular disparity:: D = angle(r) - angle(l)
10.random dot stereogram: a pair of stereoscopic images of random
made up dots. when one section of this pattern is shifted n, the
resulting
slightly in one directio disparity causes the shifted section to
appear above or below the rest when the patterns are
viewed in a stereoscope.
11.stereograms let us:: control which info goes into each eye
12.how anaglyphs (red+cyan 3D) are made:: 1. 2 pictures side by side
2.align & crop
3.apply filters to each picture
4.combine
13. two options of the correspondence problem:: 1. visual system does
2D object recognition for each retina, "labeling" each object in the
scene. visual system then assesses disparity for each object
2. visual system matches parts of the retinal image based on very simpl
properties, such as color, orientation, spatial frequency.
14.stereograms prove:: we don't need objects to see depth
15.two assumptions made by the brain in trying to solve the
1/
12
, PS 222 Exam 3questions with the only updated correct
answers
correspondence problem:: 1. each feature in one retinal image will match
only one feature in the other
2/
12
