Visual Perception (1) Flashcards
does perception = sensation?
no
does our perception go beyond the information given?
yes
form perception
ventral
depth perception
dorsal
mach bands
edge enhancement as a result of lateral inhibition
do all types of neurons have the receptive fields?
no
TH]he binding problem
how to put all of the infomration being perceived together
perceptual constancy
features of an object are perceived as constant
4 types of constacy
size
shape
brightness
colour
how do we tend to group objects?
figure ground
grouping
gestalt principles
similarity orientation colour closure proximity good continuation commonfate
our eyes can converge to …
about 10cm
Binocular visual sources
each eye has a slightly different angle
triangulating
monocular visual sources
interposition linear perspective reduced clarity height relative size shading texture gradients movement gradient
interposition
closer objects block the view of farther away objects
linear perspective
the reduced clarity closer together two converging lines are, the greater the distance perceived
reduced clarity
greater distance usually reduces clarity
height in visual field
farther objects usually higher up in visual field
shading
light and shadow contribute to dimension perception
texture gradients
texture appears smaller and may be less detailed as distance increases
movement gradient
the distance in relative motion provide cues to the difference distance
global to local recognition
recognize the whole then the parts
local to global recognition
recognize parts then construct the whole
what type of processing contributes to pattern recognition
both top down and bottom up
reification
the constructive or generative aspect of perception, perceived info is more explicit than the sensory stimulus itself
are some experts able to “see” better?
no, low level processes don’t work like that
are some people better at seeing?
yes, more able to focus on relevant things, top down information
