How do we perceive depth?
through binocular (two eyes) or monocular (one eye) cues.
Retinal disparity (binocular)
2 eyes receive slightly different images. Closer the image - greater the disparity.
Eyes move inwards to focus on close objects, the amount the eye moves indicates how far it is away.
Object overlaps or obscures another object behind
Texture gradient (monocular)
Closer objects can be seen in more detail than distant objects.
Relative height + size (monocular)
smaller or higher up in the visual field.
parallel lines converge as they do into the distance
Objects in the foreground are darker and clearer than those in the distance.
A man in a picture is smaller than one closer - perceive they are the same height when placed next to each other.
Objects seen from different angles are perceived as the same object.
Depends on the illumination = still see it as the same
We perceive the world as stationary.
Psychology as a science = (Gibson +Walk)
Gibson + Walk
36 babies aged 6-14 months - put on a glass top table with a checker board design. Other half was in clear glass with the design 4ft under. Found that babies refused to crawl over it which shows they understand depth perception