From: owner-3dui@hitl.washington.edu on behalf of Jian Chen
[jchen3@Bayou.UH.EDU]
Sent: Wednesday, September 26, 2001 12:52 PM
To: 3d-ui@hitl.washington.edu
Cc: Chad Wingrave
Subject: Re: Comparison of HMD and Dome

That is ok, Dr. Poupyrev. It is not your fault.
Let me descibe the project with details.

On Wed, 26 Sep 2001, Chad Wingrave wrote:

> I don't remember your message but my first question is in what
> context?

We want to check the human factors issues, such as performance,
safety and user comfort.
VR4 and Dome is the display device we are going to use for future NASA
training applications. We want to compare their merits.

HMDs and Dome displays will be of varying importance depending
> on the tasks they are trying to perform.  My questions would be are you
> doing a mostly visual task?  An interactive task?  Stereo/Mono and in
> relation to that, at what distance are your users working inside those
> stereo/mono environments?

I agree with you. I would like to ask what is visual task? The interactive
task we have integrated including navigation and manipulation. The device
to help navigation is joystick, and we use the simplest walking. LogiTech
head tracker is used to track subject head position. 3D mouse to track
hand position. The subject is requested to pick up objects in a VE.
the pick-up is simple touch and pick up. Those mapping functions, which
exceed human's natual abilities, are not involved, such as go-go,
extending arms, virtual menu etc.

Both displays are stereo.
The subject is sitting inside of dome in both case.

>
> I would suggest any comparisons of displays should be tightly related to
> the task that is being performed.
>
I was thinking how to prove our comparison is helpful. Every training task
uses different devices, may use motion platform.(it is also in our
customized dome system). What kind of tasks are most useful to compare the
display devices?

	thanks a lot,
Jian Chen
----------
University of Houston

>
>         -Chad (cwingrav@cc.gatech.edu)
>
> On Wed, 26 Sep 2001, Jian Chen wrote:
>
> > Hi,
> >  I posted this message after coming back from SIGGRAPH, but nobody answer
> > it.
> >  I am working on comparison of HMD - VR4 and Dome VE system for NASA.
> > Any comments?
> >
> > 	thanks,
> > Jian Chen
> > ---------------------------
> > University of Houston
> >
> >
>
>