Antikythera Mechanism is an ancient
astronomical computer built by the Greeks around 80 B.C. It was found on a
shipwreck by sponge divers in 1900, and its exact function still eludes scholars
to this day. In September, 2005, as part of the
Antikythera Research Project, we were able to access the device in the
National Archaeological Museum
in Athens to apply
reflectance imaging techniques to the front and rear
surfaces of the > 70 fragments that comprise the mechanism. A small portion of
these ‘reflectance images’, or
PTMs, are provided at reduced resolution
below. Clicking on these images will bring up the Java PTM viewer for
controlling lighting. This may take a few seconds, so be patient. If it fails to
run, you need to
download the Java Runtime Environment.
Once running, dragging the mouse with the left button depressed will change
lighting direction. Surface enhancements can be performed by right clicking in
the Java viewer -> effects -> specular.
If this page does not display correctly, please
Java Runtime Environment from
Credits + Futher Examples
More information on the Antikythera Research Project
encompassing this work is available at www.antikythera-mechanism.gr.
These demos use a Java Applet that was written by
Clifford Lyon to display PTMs interactively on the web. More examples
HP’s interactive relighting demo page
Heritage Imaging PTM demo page.
A stand-alone program with further functionality can also be downloaded from the
HPL PTM download page. To create your own PTMs, refer to the
reflectance imaging page.
Images from the Antikythera Mechanism Research Project. Supported
by the Leverhulme Trust, this is a collaboration between the University of
Cardiff in Wales, the National & Kapodistrian University of Athens, the
Aristotle University of Thessaloniki and the National Archaeological Museum in
Athens, under the aegis of the Ministry of Culture, Greece.
Essential technical support has been given by X-Tek Systems,
Hewlett-Packard, Images First, Volume Graphics and Keele University.
For information on use of these pictures please contact Professor
Mike Edmunds,Cardiff University, Wales firstname.lastname@example.org
or Tom Malzbender at Hewlett-Packard at