Panasonic AG-HMX100 Manual page 11

Terminology
parallax – separation on the screen plane between left and right images of an object.
Determines the perceived depth of objects relative to the screen plane.
negative parallax – objects are perceived to be positioned within the viewer's space, i.e.
in front of the screen plane.
positive parallax – objects are perceived to be positioned within the screen space, i.e.
beyond the screen plane.
zero parallax – objects are positioned at the screen plane, and appear to be in two
dimensions.
depth budget – the combined values of positive and negative parallax.
screen plane – the plane of the display – the surface of the movie screen, TV screen, or
computer screen.
convergence – inward rotation of the lenses, to shift the parallax of the scene and the
perceived depth of objects relative to the screen space.
point of convergence – the position on the set where the axes of the lenses exactly
overlap, defining the position of the zero parallax plane or screen plane.
divergence – the unnatural outward rotation of the human eyes to view images with an
interocular that is larger than that of the average human eye (2.5"). Results in wall-eye.
interocular – horizontal displacement of the lenses of the cameras.
hyperstereo – the effect of an interocular that is larger than that of the average human
eye (2.5").
miniaturization – an artifact that results from use of a larger interocular than that of
the average human eye (hyperstereo).
hypostereo – the effect of an interocular that is smaller than that of the average human
eye (2.5").
gigantism – an artifact that results from use of a smaller interocular than that of the
average human eye (hypostereo).
orthostereo – the effect of shooting with parallel lenses and an interocular that
approximates that of the average human eye.
cardboarding – an artifact that results from the use of long focal length lenses.
keystoning – an artifact that results from excessive convergence of the lenses.
wall-eye – an uncomfortable condition that results from the attempt to fuse objects with
strong positive parallax and a wider-than-normal interocular.
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