Real-Time Projector Tracking on Complex Geometry Using Ordinary Imagery
Calibration techniques for projector-based displays typically
require that the display configuration remain fixed,
since they are unable to adapt to changes such as the movement
of a projector. In this paper, we present a technique
that is able to automatically recalibrate a projector
in real time without interrupting the display of user imagery.
In contrast to previous techniques, our approach
can be used on surfaces of complex geometry without requiring
the quality of the projected imagery to be degraded.
By matching features between the projector and a stationary
camera, we obtain a new pose estimate for the projector
during each frame. Since matching features between a
projector and camera can be difficult due to the nature of
the images, we obtain these correspondences indirectly by
first matching between the camera and an image rendered
to predict what the camera will capture.
(Download Video - 65MB)
Our tracking process adapts to changes in projector pose,
allowing "on the fly" display reconfiguration.
T. Johnson, H. Fuchs, "Real-Time Projector Tracking on Complex Geometry Using Ordinary Imagery"
ProCams 2007, Minneapolis, MN, June, 2007 (pdf | slides | video)