Interaxial
separation is the distance
between the centers of two camera
lenses. The human interocular separation
is an important constant stereographers
use to make calculations for interaxial
separation. Beware that Interaxial
separation is often incorrectly referred to
as “Interocular” and vise-versa.
In the
professional world of
stereoscopic
cinema it has become the norm to refer
to interaxial separation as “i.o.” even
though it is the incorrect term.
Interaxial Separation
Binocular Vision, Retinal Disparity and Parallax
Binocular Vision simply means that two eyes are used in the vision system.
Binocular Vision is very important to most mammals (including humans)
because it allows us to perceive depth at close range.
Try this: Hold one
fi
nger next to your ear. Now stretch your other arm out
straight and hold up another
fi
nger. Now bring your two
fi
ngers together
and touch the tips together. Is was easy right? Now repeat the same
procedure but close one eye. Were you able to touch your
fi
ngers
together on the
fi
rst try? Now you know how important binocular vision
is at close range.
When we look around at objects at di
ff
erent distances from us the images
of those objects will be projected on our retinas in slightly di
ff
erent
locations for each eye. Our brain can interpret this “Retinal Disparity” and
help us determine depth.
When we shoot 3D with two cameras from slightly di
ff
erent positions the
same thing happens; each camera’s sensor registers the objects in the
scene in slightly di
ff
erent horizontal positions. We call this di
ff
erence
“parallax.”
Eyeballs converged
on center object
XF300/305 Whitepaper
Stereoscopic 3D
Tim Dashwood
2
Summary of Contents for XF105
Page 1: ......
