The IndycamInput class will interface the required system libraries
in order to capture images from the SGI system's Indycam.
Its GetImage() method will never normally return NULL, as subsequent image captures can always be made and only in the case of, for instance, hardware errors will NULL be returned.
Indycams are able to capture images at various resolutions, specifically, fractions
of the NTSC frame size, 
, and its GetDimension()
method will return the resolution the Indycam has been set to.