From: diego@minerva.st.dsi.unimi.it (Diego Montefusco)
Subject: TECH: Filtering head position/orientation data
Date: Wed, 30 Dec 92 00:18:35 CET



I am now working with PC-based Sense8 WTK system. I'd like to
implement some kind of filtering on the position/orientation data of
the head tracker (a Polhemus Isospace). Well actually I am more
interested in ORIENTATION data...

I've read about the Kalman predictive filtering, but, although I don't
really know it, it sounds REALLY computational expensive, and on a 486
we're not that rich.

If someone can on the other hand say it is NOT expensive, well...
better!

If it is, I'd like to hear about any idea to cheaply (and therefore, I
know, not very accurately!) filter the data, trying to reduce lag and
so predict the... next move. Maybe some kind of mean...

ANY IDEA under the Christmas tree for me?

Diego

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