Depth+ size perception Flashcards
(21 cards)
occulomotor cue
based on our ability to sense the position of our eyes and the tension in our eye muscles
pictoral cues
depth in a picture
movement based cues
sources of depth created by movement
convergence
inward movement of eyes when looking at something close
accomodation
change in shape in the lens when we focus on something
binocular depth cues
both eyes see two different views together they see depth
binocular disparity
difference between right and left retina
horoptor
imaginary dot and if any object is on it it will be on corresponding spots on the retinas
stereopsis
depth info provided from the left and right eye
3d movies
show 2 different sights of the movie therefore with the glasses your eyes put it together for one
random dot stereogram
2 identical patterns with one shifted to the right
physiology of depth perception
monkeys matched texture gradients that were 2d pictures with 3d stereograms
size, distance & visual angle
objects placed close, medium, far. one was made bigger and observer had to make other 2 match size
illusions based on size constancy
perception of size remained constant
changes in distance and retinal size would balance each other
terra subterranea (illusions)
size of the image is the perceived distance from you
monsters in hallway
muller lyer (illusions)
straight lines with inward fins were perceived as shorter than lines with outward fins
dumbell muller lyer (illusions)
lines going through dumbbells were perceived as shorter than lines touching the end of dumbbells
ames room
room designed with one eye peep hole with left corner much farther than right corner. 2 same sized people put in each corner. left corner seemed a lot smaller than right
pomo illusion
horizontal lines placed on railroad tracks. top line seemed longer
moon illusion
moon at horizon seems much larger than moon in sky even though they are same distance apart
distance perception
action effects perception. people asked to throw balls blind folded, others asked to blindly walk to target. people throwing balls overestimated