Lecture 15 - Seeing Depth Flashcards
3 cue types
- oculomotor depth cues
- monocular depth cues = pictorial and movement-produced cues
- binocular depth cues (not important)
cues for depth perception
This approach focuses on information in the retinal image that
is correlated with depth in the scene.
We learn – through experience
dependent plasticity –
• The association becomes automatic
through repeated exposure.
experience
dependent plasticity
multiple instaces of input will give you a pattern that you recognize immediately
the connection between the cue and
depth. (The brain changes connectivity as the result of
experience. )
Oculomotor cues
sensitive to how the muscles in your eyes are moving
are based on sensing the position of the eyes and muscle tension.
convergence and accomodateion
convergence
- Inward movement of the eyes when we focus on nearby
objects.
Accommodation
Change in the shape of the lens when we focus on objects at different distances.
Monocular
have a lot
cues come from one eye
– Pictorial cues
• Occlusion
- relative height
- relative size
- perspective convergence
- familar size
pictorial cues
looking for depth info from TWO DIMENSIONAL OBJECTS
sources of depth information that come from 2-D
images, such as pictures.
occulusion
when one object partially covers another
painting of a boy coming out of a picture frame
Relative height -
relative to the horizon: break between objects on land and sky
closer to horizon = more distance
objects below the horizon that are higher in the field
of vision are more distant
– Objects above the horizon that are lower in the visual field are
more distant.
relative size
when objects are
equal size, the closer one will take up more of your visual field
Perspective convergence -
parallel lines appear to come together in the distance
ex: lines in the road
Familiar size
distance information
based on our knowledge of object size
ex: you know how big mountains, motorcycles, etc… should be
