Transcript 2320Lecture11.pptx

Midterm 1
• Mean 71%
Detection and Loudness
• For example,
tones of
different
frequencies
that are judged
to be equally
loud have
different SPLs
(dB)
Auditory Scene Analysis
• Effect of pitch proximity:
Do you hear this?
Or this?
far
close
To Go Over Your Test:
• Email Mitch
[email protected] for an appointment
Binocular Disparity
• Binocular disparity is the difference
between the two images
Binocular Disparity
• Binocular disparity is the difference
between the two images
• Disparity depends on where the
object is relative to the fixation point:
– objects closer than fixation project
images that “cross”
– objects farther than fixation project
images that do not “cross”
Binocular Disparity
• points nearer than
horopter have crossed
disparity
• points farther than
horopter have
uncrossed disparity
The Horopter
Binocular Disparity
• Why don’t we see double vision?
Binocular Disparity
• Why don’t we see double vision?
• Images with a small enough disparity
are fused into a single image
Binocular Disparity
• Images of objects near to
the horopter are fused in
your “cyclopean view”
• Beyond Panum’s area the
images are diplopic
• Why don’t you notice?
Panum’s Area
Stereograms
• seeing depth requires “only” two
different images on the retina
Stereograms
•
seeing depth requires “only” two
different images on the retina
•
this could be accomplished by an optical
device that projects separate images
into the two eyes
Presenting Binocular Images
• Various ways to add depth:
– 1. Stereoscope
Presenting Binocular Images
• Various ways to add depth:
– glasses with different lenses
Presenting Binocular Images
• Various ways to add depth:
– glasses with different lenses
Presenting Binocular Images
• Various ways to add depth:
– glasses with different lenses
Presenting Binocular Images
• Various ways to add depth:
– LCD Shutter Glasses
Stereograms
Divider
Left Eye
Right Eye
•Right eye sees face to the
right; left eye sees face to the
left therefore:
uncrossed disparity
•Face appears behind the
square
Stereograms
Divider
Left Eye
Right Eye
What would you see?
Stereograms
Divider
Left Eye
Right Eye
•Right eye sees face to the
left; left eye sees face to the
right therefore:
crossed disparity
•Face appears in front of
square