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Today's Topics:
1. Bill Gates at Harvard University (Michael Quan)
2. Re: Bill Gates at Harvard University (Bradford Bohonus)
3. Re: hands-on object VR (Yuval Levy)
4. Here's a link: Bill Gates at Harvard University (Michael Quan)
5. Re: hands-on object VR (Patrick Cheatham)
6. Immervisions' PURE player is now available for Pocket PC
(Keith Martin)
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Message: 1
Date: Sat, 9 Jun 2007 20:48:07 -0400
From: Michael Quan <email@hidden>
Subject: Bill Gates at Harvard University
To: quicktime-vr list <email@hidden>,
email@hidden
Message-ID: <email@hidden>
Content-Type: text/plain; charset=US-ASCII; format=flowed
http://ivrpa.org/node/1366
------------------------------
Message: 2
Date: Sat, 9 Jun 2007 18:39:40 -0700
From: Bradford Bohonus <email@hidden>
Subject: Re: Bill Gates at Harvard University
To: email@hidden
Message-ID: <email@hidden>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
How about posting a URL all of us can access?
On Jun 9, 2007, at 5:48 PM, Michael Quan wrote:
http://ivrpa.org/node/1366
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Message: 3
Date: Sun, 10 Jun 2007 02:08:46 -0400
From: Yuval Levy <email@hidden>
Subject: Re: hands-on object VR
To: Patrick Cheatham <email@hidden>
Cc: email@hidden
Message-ID: <email@hidden>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Patrick,
thanks for the hints.
Patrick Cheatham wrote:
That is, keep your camera stationary; photograph your object upright
like your example. Then lay it on its side and photograph it; then
rotate the (second set of) photographs themselves to give you the
top/bottom orientation.
I'm not sure I fully understand. You mean I should just shoot like two
circumferences perpendicular to each other, one horizontal and one
vertical? Is this sort of Object VR possible? My little
understanding of
Pano2QTVR is that I can only do row by row, but I might be mistaken.
Anyway I'll have to rotate the lights as well, which I am afraid
will be
more difficult. I don't know how much precision is required in the
lighting rotation before human eye perceives that the image has been
tricked?
If you need to do a true, full multi-row object -- then one of the
rigs
available will help you as far as camera positioning along the
vertical
axis. I don't have any hands on experience with them. I've been a
little
more DIY with my object projects (head-on rather than hands-on :-P).
yeah, my ambition is true, full multi-row object. I've been all DIY so
far. I produced only a single row object, but I made calculations for
camera positions along the vertical axis (and realized there would be
also a shadow problem if I don't pay attention how I put the lights),
and it would work for the top 90°. But if I want to go below the
turntable to -90°, I have a problem. Which of course I could try to
solve by turning the object upside down, with the obvious problems of
centering it properly and of the light/shadows. My turntable is not
transparent, so I wont be able to simulate the light from above :(
Of course, and as you're aware I'm sure, your tradeoff in time spent
will only put that time somewhere else. Like in the lighting. :) At
least much of the post=production can be automated.
Yes, I am positive about my post-production. It's the shooting that
still requires some thinking and fiddling.
thanks
Yuv
------------------------------
Message: 4
Date: Sun, 10 Jun 2007 08:35:02 -0400
From: Michael Quan <email@hidden>
Subject: Here's a link: Bill Gates at Harvard University
To: email@hidden
Cc: quicktime-vr list <email@hidden>
Message-ID: <email@hidden>
Content-Type: text/plain; charset=US-ASCII; format=flowed
http://www.quantumvr.com/email@hidden
Sorry for the confusion.
------------------------------
Message: 5
Date: Sun, 10 Jun 2007 08:25:45 -0700
From: Patrick Cheatham <email@hidden>
Subject: Re: hands-on object VR
To: Yuval Levy <email@hidden>
Cc: Apple Developer Connection <email@hidden>
Message-ID: <email@hidden>
Content-Type: text/plain; charset=ISO-8859-1; delsp=yes; format=flowed
Hey Yuval:
I'm not sure I fully understand. You mean I should just shoot like
two circumferences perpendicular to each other, one horizontal and
one vertical? Is this sort of Object VR possible? My little
understanding of Pano2QTVR is that I can only do row by row, but I
might be mistaken.
Ha, it may be that I'm not explaining well enough... :P What I meant
was similar to your comment (below) about turning the object 90-
degrees. Instead of moving your camera, move your object -- then, for
the images where your object itself has been manipulated (rather than
just spun on the turntable), rotate your images in post.
For the increments less than 90-degrees (your in-between rows), then
shuffling the camera up/down along an arc can work.
Anyway I'll have to rotate the lights as well, which I am afraid
will be more difficult. I don't know how much precision is required
in the lighting rotation before human eye perceives that the image
has been tricked?
This is a difficult issue... Lighting objects is already difficult,
and moreso when you physically turn your object on its side but shoot
it from the same position. Your shadows are "wrong" if you rotate the
image back to the intended view.
yeah, my ambition is true, full multi-row object.
36 * 36 images (for example)? Yikes! Is this for a client or for
kicks?
I've been all DIY so far. I produced only a single row object, but
I made calculations for camera positions along the vertical axis
(and realized there would be also a shadow problem if I don't pay
attention how I put the lights), and it would work for the top 90°.
But if I want to go below the turntable to -90°, I have a problem.
Which of course I could try to solve by turning the object upside
down, with the obvious problems of centering it properly and of the
light/shadows. My turntable is not transparent, so I wont be able
to simulate the light from above :(
Maybe nix the turntable, and go for just the tripod stem or post that
it's on. Or suspend your object. Or (possibly easiest) turn your
object on its head. In your example, the lighting is pretty dramatic.
If you don't need the drama, maybe go a little flat (more even) with
the lighting -- this will help some.
It's all tradeoffs! :)
Patrick
email@hidden
http://cheathamlane.net
ofc: 510/868.9120
cel: 415/290.8185
------------------------------
Message: 6
Date: Sun, 10 Jun 2007 19:29:16 +0100
From: Keith Martin <email@hidden>
Subject: Immervisions' PURE player is now available for Pocket PC
To: email@hidden
Message-ID: <p06240808c291f081ee73@[10.0.0.167]>
Content-Type: text/plain; charset="us-ascii" ; format="flowed"
Immervision's 'PURE Player' panorama player is now available for
Pocket PC devices - i.e. Windows Mobile-powered PDAs and phones - and
it works. (Better than most other WM5 apps I've tried, although
that's not exactly hard...)
Note that it will ONLY play .ivp packaged panoramas made with the
company's PURE Starter Toolkit, and it will only play files stored
locally, not ones online.
Details from Immervision's site is here:
http://www.immervision.com/en/multimedia/multimedia_products/
multimedia_products_2_5.php
And a quick video of me trying out a panorama on my ridiculously
large phone (good PDA, odd phone) is here:
http://www.thehelpful.com/photos/v/test/vr-on-fat-phone.mov.html
(Please excuse my wife waving in the background, she always laughs at
me when I do these things. :-)
Basically, I can now store Immervision-produced VR panoramas on my
PDA/phone and demonstrate them to people very effectively. No more
clumsy attempts to explain by waving my hands around, hauling out a
full-size laptop, or dragging people over to an online machine
somewhere... I can just whip out my phone (from my bag, it won't fit
my pocket!) and let people explore.
I believe the words I'm looking for are "Rock and Roll!"
(And I *still* don't know if the iPhone will be able to play QTVR.)
k
------------------------------
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End of QuickTime-VR Digest, Vol 4, Issue 187
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