DK Ching VD - Vision

field of vision

the entire field encompassed by the human eye when it is trained in any particular direction

visual angle

the angle that an object or detail subtends at the point of observation, usually measured in minutes of arc

optical illusion

a perception of visual stimuli that represents what is perceived in a way different from the way it is in reality

perception

the act or faculty of apprehending by means of the senses or of the mind

visual perception

an awareness derived by the visual system in response to an external stimulus

camouflage

the obscuring of a form or figure that occurs when its shape, pattern, texture, or coloration is similar to that of its surrounding field or background

projection

a property of perception in which the mind's eye searches for meaning by imagining and projecting known or familiar images onto the seemingly amorphous shapes of a pattern until it finds a match that makes sense

similarity

a property of perception in which there is a tendency to group things that have some visual characteristic in common, such as a similarity of shape, size, color, orientation, or detail

proximity

a property of perception in which there is a tendency to group elements that are close together, to the exclusion of those that are further away

continuity

a property of perception in which there is a tendency to group elements that continue along the same line or in the same direction

constancy

a perceptual phenomenon in which apparent differences in size are ignored in order to identify and categorize things, regardless of how distant they are, leading to the perception of a class of objects as having uniform size and constant color and texture

closure

a property of perception in which there is a tendency for an open or incomplete figure to be seen as if it were a closed or complete and stable form

background

the parts or portion of a scene, situated in the rear, as opposed to foreground

foreground

the parts or portion of a scene situated in the front, nearest to the viewer

gestalt

a unified configuration, pattern, or field of specific properties that cannot be derived from the summation of the component parts

pattern

a consistent, characteristics, or coherent arrangement based on the interrelation of component parts

simultaneous contrast

a phenomenon of visual perception in which the stimulation of one color or value leads to the sensation of its complement, which is projected instantaneously on a juxtaposed color or value

successive contrast

a phenomenon of visual perception in which intense exposure to one color or value leads to the sensation of its complement, which is projected as an afterimage on another color or surface viewed immediately thereafter

afterimage

a visual sensation that persists after the stimulus that caused it is no longer operative or present