March6.rtf

23 views5 pages
16 Apr 2012
Department
Course
Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Solving the Stereo Correspondence Problem
- eyes make a mistake where the visual system matches
two separate dots, and thinks they came from the same
place (illusion is that the place the visual system matches
is further back than it actually is)
-eyes try to solve stereo correspondence problem
(repeating pattern) incorrectly, illusion
Auto-stereograms: illusion caused by solving the stereo-
correspondence problem incorrectly
Second stage of deriving depth information is calculating
the distance from the left eye to the right
Retinal Disparity: what is the distance of the object in the
left eye relative to the right? 3 outcomes (diagrams on
courselink):
1. Items on the horopter (fixation plane, when you
focus your eyes there is a plane of viewing)
-when items are on the horopter (curved plane), the
object will occupy the exact same position on the retina of
both eyes
Zero Disparity -distance from the midpoint
(reference point) of the eye is the same for both eyes ^ ^
2. Items in front of the horopter (crossed disparities):
when you have something closer to you than where your
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 5 pages and 3 million more documents.

Already have an account? Log in
fixation point is, the image will fall on opposite sides
of your retina (crossed, temporal side)
3. Items behind the horopter (uncrossed disparities):
the point is going to fall on the same side of the reference
point (slightly to the right of middle point) but they will
not be in the same position, one will me slightly more to
the middle when and object is farther than your
horopter (closer to nasal side)
B) There are a limited range of distances that you can get
Binocular Disparity from (stereo-depth)
Panums Fusion Area: there is a narrow area on the
fixation plane where an image can be fused in the same
place on both retinas. narrow area where you cause
fuse item to get 3D image
-if you are fixating a distance away, and an item is
too close, you will see a double image because it is
outside Panums area
-" " ", item is too far, double image
C) How is stereo-depth information derived in the brain?
Tilt after effect can transfer across eyes, if you adapt eye
to slanted lines, cover it, and uncover opposite eye, the tilt
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 5 pages and 3 million more documents.

Already have an account? Log in

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Homework Help
Class Notes
Textbook Notes
40 Verified Answers
Study Guides
1 Booster Class
Class+
$8 USD/m
Billed $96 USD annually
Homework Help
Class Notes
Textbook Notes
30 Verified Answers
Study Guides
1 Booster Class