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Why use 3D data?

An 3D image containing has many advantages over its 2D counterpart:

Explicit Geometry

e.g Size (and shape) of an object in a scene can be straightforwardly computed from its three-dimensional coordinates.

Recent technological advances ( e.g. in camera optics, CCD cameras and laser rangefinders) have made the production of reliable and accurate three-dimensional depth data possible.

Consequently many three-dimensional data acquisition systems have been developed.

tex2html_wrap_inline2984 David Marshall 1994-1997