From: Marc Bernatchez <mbernat@gel.ulaval.ca>
Subject: Re: TECH: depixelization
Date: Thu, 29 Aug 1996 22:22:54 -0400


>Hi:

Hi Jeananne,

	I have sort of done that, at least partially, in an analysis I
have made. It's on-line in HTML format at our site VResources(see the
URL at the end). Check the article section to find it.

>I'm a graduate student doing a research paper on HMD's (actually a
>comparison of CyberMaxx 180 and the Virtual i-O glasses).
>
>I couldn't find a good explanation of depixelization.  Can you give me
>one?  Also, one source said the CyberMaxx had depixilization and one
>said it didn't, can you clear this up?

The latest version has depixelation. The older version of it didn't
include this functionnality I think. Be aware that this HMD isn't
produced by VictorMaxx anymore.

The depixelization is a process by which you average pixels with their
close neighbors. This will give, as a visual result, a smoother
appearance of the overall scene. The process will remove high contrast
local changes between pixels. Physically, this can be done as simply
as using a depolished glass that you place between the user's eye and
the image generator in the HMD. More complex device are also used to
minimize the loss of precision and resolution of the display while you
still diminish the stair step effect. Holographic filters are one of
these high end mean to provide such depixelization.

I will add a definition of this term in the "VR term" lexicon now
found at VResources.

Bye

 Marc Bernatchez             |  E-mail: mbernat@gel.ulaval.ca
 C.O.P.L. (local plt-00307)  |============================================    
 Dep. Genie electrique       |  http://www.gel.ulaval.ca/~mbernat
 Universite LAVAL            |  http://www.imaginative.com/VResources
 Quebec, Canada              |============================================
 G1K 7P4                     | Virtual Reality is the future of computers