Correction of Tracking Distortion
This was not an industrial project, but my own research initiative.
The
problem was, that due to metal, electro-magnetic tracking systems like
Fastrak and Ascension reported distorted (i. e., wrong) positions and
orientations of the tracking sensors. Without correction the image
rendered in the cave would look like this:
while it really should look like this:
This is because if you place the sensor at a regular grid,
you get something like this:
I have developed a method to correct these distortions. It is able to
correct translational as well as orientational errors. It is very fast
(typ. < 1 millisecond). A further advantage is that it
doesn´t require a grid-topology for the input set, in fact, the input
set can be an arbitary set of points, which allows very fast semiautomatic
collection of field data.
You can find more details on this method in
my dissertation and an earlier
paper.
More projects
Gabriel Zachmann
Last modified:
Sat Sep 10 16:01:08 MDT 2005