Depth Perception (5) Flashcards
3 cues for depth perception*
- Oculomotor cues
- Binocular depth cues
- Monocular cues
What does the ‘motor’ in Oculomotor cues imply
Involvement of muscles
Convergence (oculomotor)
The inward movement of our eyes as we look at nearby objects
Accommodation (oculomotor)
The changes in the shape of our lens as we focus on nearby objects
Binocular depth cues
The difference in the position of the image in our 2 eyes
Depend on the info received from both eyes
Main binocular cue is disparity
Stereopsis (binocular depth cue)
The perception of depth as a result of retinal disparity
Monocular depth cues
Cues that are provided from one eye
2 types of monocular cues
Pictorial cues and movement based cues
2 main pictorial cues
Occlusion - when an object partially hides another object, the one that is occluded is perceived to be further away (or behind)
Cast shadows - the shadows that are cast by objects can provide info regarding the objects location in depth (as well as its shape)
Motion parallax
The difference in perceived speed of movement for near and far objects
Size distance scaling equation**
S = K (R x D)
S = perceived size
R = retinal image size
D = perceived distance
Ames room
A heavily distorted room that is used to create an optical illusion
[viewed with one eye through a pinhole in order to avoid any extra depth clues from stereopsis and motion parallax]
Müller-Lyer illusion
Straight lines with inward/outward fins
