Week 2 - Depth cues

Biopsychosocial

model that allows us to identify the biological, psychological and social factors that influence a person’s perception.

Biological factors

Factors based off our physiology in which individuals may experience difference in functionality due to age, genetics, injury ext.

Psychological factors

Factors based on the mental state of individuals, such as emotions which can influence the way their perceive their environment.

Socio factors

Factors based on the environment an individual is/was based in such as culture which can influence the way their perceive their environment.

Depth perception

A automatic and rapid reaction to environment vital for survival through being able to judge where objects are in the space around us.

convergence

• tension of eye muscle depending on distance of object

  high tension → closer

  low tension → further

retinal disparity

• comparison of retinal images and determining the distance of object based of image disparity

• caused by eyes being 6-7 cm apart

  high disparity → close

  low disparity → far

accomodation

brain monitors movement of ciliary muscles that control bulge degree of the lense to determine the distance of the object.

• bulge → close

• elongate → far

Linear perspective

apparent convergence of parallel lines as they recede into the distance.

interposition

When an object partially obscures another

• partially obscured→ further

• not obscured → closer

texture gradient

gradual diminishing of detail as distance increases

• higher detail → closer

• lower detail → further

relative size

object that produces largest image on retina perceived as closer whereas object that produces smallest image on retina as further.

height in visual field

distance of object to the horizon.

• closer to horizon → father away

• further from horizon → closer