Abstract
Recent improvements
in laser rangefinder technology, together with algorithms developed in our
research group for combining multiple range images, allow us to reliably and
accurately digitize the external shape of many physical objects. As an
application of this technology, I and a team of 30 faculty, staff, and students
from Stanford University and the University of Washington spent the 1998-99
academic year in Italy digitizing the sculptures and architecture of
Michelangelo.
Our primary
acquisition device was a laser triangulation rangefinder mounted on a large
motorized gantry. Using this device and a smaller rangefinder mounted on a
jointed digitizing arm, we created 3D computer models of 10 statues, including
the David. These models range in size from 100 million to 2 billion polygons.
Using a time-of-flight rangefinder, we also created 3D computer models of the
interiors of two museums, including Michelangelo's Medici Chapel. Finally,
using our rangefinders in conjunction with a high-resolution digital color
camera, we created a light field and aligned 3D computer model of
Michelangelo's highly polished statue of Night. A light field is a dense array
of images viewable using new techniques from image-based rendering.
As a side project,
we also scanned all 1,163 fragments of the Forma Urbis Romae, the giant marble
map of ancient Rome carved circa 200 A.D. Piecing this map together has been
one of the great unsolved problems
of archeology. Our hope is that by scanning the fragments and searching among the
resulting geometric models for matching surfaces, we can find new fits among
the fragments.
In this talk, I
will outline the technological underpinings, logistical challenges, and
possible outcomes of this project.