Depth perception and Illusion Flashcards
simple depth perception
adaptation of the eyes to objects at close distance
relative depth perception
depth created by objects at various distances, without any adaptation of the eyes
mechanisms for depth perception
convergence of the eyes
accommodation of the lens
binocularity - stereopsis, spatial disparity
neural mechanism
convergene
the adaptation of the eyes to the object
the inward movement of the eyes when focusing on a nearby object
regulated by ocular muscles
accommodation
adaptation of the lens of the eye (pupil)
visual angle
closer the object, bigger the visual angle and object appears
binocular depth perception
objects that do not fall on horopter fall on non-corresponding points
- these points make disparate images
- absolute disparity concerns one object
- the amount of disparity indicates how far an object is from the horopter
=relative disparity is the difference between the absolute disparity of two objects
stereopsis
depth information provided by binocular disparity
stereoscope
uses two pictures from slightly different viewpoints simulating separate eye intakes
false fusion
occurs in near space when two pictures are presented separately to each eye in the stereoscope
occlusion (interposition)
when one object is overlapped by another this suggest the overlapped object is further away- depth cues
size reduction
smaller objects seem further away - depth cues
convexity/concavity - depth cutes
3d perception can be created with black/white shading
atmospheric perspective
further away parts coloured in more bluish tones
viewpoint perspective
created by diagonal spatial axes which converge in a viewpoint
