Projection Surfaces

Mark D. Johnson mjohnson at
Wed Oct 25 17:10:43 CDT 2000

    We at USC are going the wallpaper route (WallTalker) to save space as
well as money.  The three projectors that we are going to use have 2k lumens
each and should give a very sharp picture.   This will be similar to ANL's
setup we saw in September.  I feel that having one screen with the 2 or 3
projectors merged together will give a cleaner appearance and keep the eye
from focusing on one particular screen.

Jennifer Teig von Hoffman wrote:

> FWIW, BU uses a rear-projection screen, and it makes a real difference in
> the quality of the image (and of the user-experience, since people can
> walk across the screen and stuff without disrupting images). When we were
> projecting against the wall (perhaps the cheapest imaginable projection
> surface?) we could function okay, but some image detail seemed to get
> lost.
> So. . . issues regarding screen selection are probably broader than just
> output merging (which we don't do here, though we do have our projectors
> lined up reasonably well).
> - Jennifer
> On Wed, 25 Oct 2000, Don Morton wrote:
> > Howdy, as we get in the process of ordering equipment, etc., I'm still
> > considering what to use for a projection surface.  I'm not clear
> > on whether it's important to be able to "merge" the output
> > from 2 or 3 projectors into a single image.  If that's not an
> > important issue, couldn't we just get away with 3 small, CHEAP screens,
> > one for each projector?
> >
> > I don't think I've seen an example of "merged" projections, though I
> > recall at ANL, there might have been an attempt at that.
> >
> > Thanks, Don
> > --
> >    Don Morton           
> >    Department of Computer Science       The University of Montana
> >    Missoula, MT 59812 | Voice (406) 243-4975 | Fax (406) 243-5139
> >

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