Panasonic AG-HMX100 3D Production Post White Paper - Page 11

Terminology

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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. 11

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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.