Protecting 3D Graphics Content
David Koller and
Communications of the ACM, 48(6):74-80, June 2005
Valuable 3D graphical models, such as high-resolution digital scans of cultural
heritage objects, may require protection to prevent piracy or misuse, while
still allowing for interactive display and manipulation by a widespread
audience. This article considers some techniques for protecting 3D graphics
content, and describes a remote rendering system that we have developed for
sharing archives of 3D models while protecting the 3D geometry from
unauthorized extraction. Additionally, we demonstrate how digitized 3D models
can be used to generate accurate physical replicas of artworks such as
The article as printed in the CACM issue (and in the PDF file above)
contains some errors. These are corrected in the HTML version above. The
errors we know about are:
- In the sidebar "Generating A Replica of Michelangelo's David,"
the ordering of the images does not properly correspond to the references
in the text or the figure caption. From left to right, the images in the
published article are of the laser scanner, three photographs of the
replica master under construction, a computer rendering of the 3D model,
and a photograph of an inexpensive replica purchased from a street vendor.
There is no photograph of the final replica. One photograph of the
replica appears on the front cover of the issue (shown at the top of this
web page). Another photograph, showing our replica at the same size and
with the same coloring as the street vendor replica, can be seen in the
corrected version of the sidebar, in the HTML file (linked above).
- The color, intensity, and cropping of the two renderings in Figure 3
should be identical.