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Anonymous

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Posted on Saturday, March 17, 2001 - 5:38 pm:   Edit PostDelete PostView Post/Check IPPrint Post

Are those DTI 3D monitors really as good as the reviews claim them to be? I'd really like to get some 3d display, but HMD's don't seem too practical right now, especially with thier limited resolutions, and the LCD glasses everyone complains about flickering, and my current monitors don't even do 120Hz.

I'd just like to hear some input from anyone who has actually seen these in person, since the price on them is pretty hefty. But the 15.1" one has come down in price a LOT so it's got me debating purchasing one or not now.

Any input would be greatly appreciated, thanks.

-Toasty
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Eric Lindstrom

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Posted on Sunday, March 18, 2001 - 6:45 am:   Edit PostDelete PostView Post/Check IPPrint Post

Yes they work real nice, but:

1) they are expensive.

2) Autostereo (lenticular) monitors don't have much software support, and require more image data than a stereo-pair system, meaning you need a fast PC

the only cool thing about them is they do not require anything strapped to your head. It's an emerging technology, wait a couple years, and until then use shutterglasses (and get a better monitor, if it can't do 120Hz, it's getting old)

-Eric L.
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Giorgio Bogoni

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Posted on Sunday, March 18, 2001 - 2:24 pm:   Edit PostDelete PostView Post/Check IPPrint Post

Just a question: you said "lenticular".
I know Philips and 4D-vision produce lenticular autostereo-monitor (at least 7 views - a lot of CPU power needed, no real-time features)
Elsa and Dresden-3D use eye-tracking technology with standard 2 views approch and LCD-barrier dynamic shutter (no more CPU load then other stereoscopic formats).
I thought DTI uses a 2 view approch with no eye-tracking (assuming you're in front of the monitor) ... but I really don't know!
Am I wrong?
Does anybody knows?
Thanks, Giorgio.
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Eric Lindstrom

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Posted on Tuesday, March 20, 2001 - 12:37 am:   Edit PostDelete PostView Post/Check IPPrint Post

No, I think you are correct on that one.

The drawbacks to the filtering method is a small FOV, meaning, you have to look at the monitor while sitting directly in front of it. This doen't apply to the lenticular setups, but with the LCD method, it is a critical factor.

The LCD filters over the screen work much the same way as the lenticular setup, but the view is directed to each eye by multiple LCD "strips" which works like shutterglasses, but pass the image to the eye like the curved, lens "strips" that are on a lenticular sheet.

Here's a good example of how an autostereo display works. Take a sheet of paper, and fold it into opposing 2" segments along it's width (if viewing it in landscape orientation) When the sheet is folded, it will look like an accordion. See my diagram below:


---------(left eye)-------(right eye)-------


/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\- folded Paper

The left eye only see the faces of the paper leaning to the right and the opposite is true for the right eye, as it can only see the images leaning to the left. If you were to take a stereo pair (two images, one for each eye) and cut them up into identical strips, and glue them into their proper places on the sheet. you would get this:


--------(left eye)------(right eye)---------


/LR\/LR\/LR\/LR\/LR\/LR\/LR\/LR\/LR\/LR\/LR\

...where /L represents the left image

and R\ represents the right image


In theory, each eye sees only it's appropriate image, and if you did this right, it should be in stereo.


If you are just trying to avoid wearing shutterglasses, it would be a good solution, but you can use the same method with a polarizing filter in front of the monitor with paper glasses.

I still reccommend shutterglasses over one of these other methods, as the screen-based tecnologies are still new, and are a little ways off from consumer applications.

-Eric L.
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Giorgio Bogoni

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Posted on Thursday, March 22, 2001 - 12:38 am:   Edit PostDelete PostView Post/Check IPPrint Post

Hi Eric,
polarizing Z-screen are still very expensive (even if I think they can deliver an image much more better than autostereo display).
Have you ever thought about interlaced polarization (something like Vrex patent)?
LCD display are polarized; if someone could built an add-on rotating of 90° odd-lines polarization ... well, you'll get some trouble aligning it but it could be the future when CRT monitor are going to disappear ...
Giorgio.
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Eric Lindstrom

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Posted on Thursday, March 22, 2001 - 4:59 am:   Edit PostDelete PostView Post/Check IPPrint Post

Or perhaps, a non-rotating polarizer with a large, mechanichal shutter of some sort, like an opaque, black card with slits cut in it, and the card (I.E. a shutter) wiould be cycled back and forth across the screen by a motor-driven mechanism of some sort. it would be a cool homebrew project

-Eric L.
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Eric Lindstrom

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Posted on Thursday, March 22, 2001 - 5:03 am:   Edit PostDelete PostView Post/Check IPPrint Post

Oh yeah, one more thing. the whole thing could be sync'ed from a parallel port. just build a circuit that could contol the motor's speed, thus ajusting the shutter speed. a circuit that is computer-contollable is possible; they do the same thing for robotics projects.

Interesting, no?

-Eric L.
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Andreas Schulz

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Posted on Thursday, March 22, 2001 - 12:24 pm:   Edit PostDelete PostView Post/Check IPPrint Post

Sounds like that old Vectrex stereo headset, where the shading was done with a rotating disk with black and transparent segments...
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giorgio bogoni

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Posted on Saturday, March 24, 2001 - 1:43 pm:   Edit PostDelete PostView Post/Check IPPrint Post

I cannot understand how it can work.
All lines are already polarized at 45° by the LCD monitor, you need to rotate polarization of (let's say) odd lines to 135°
I need to wear polarized passive glasses.
I'm testing polarization rotating materials right now.
write me if you are interested.
Giorgio
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Ron R

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Posted on Friday, December 21, 2001 - 4:10 am:   Edit PostDelete PostView Post/Check IPPrint Post

Hi I am no expert but I have a DTI monitor 15 inch
I got it for games .
I also have H3D shutter glasses ,
I glasses,simuleys, and many other products for 3D
the DTI is cool but also the biggest waist of my money so far
it only workes when you are in direct alignment with it.
And when playing games that is hard to do
the result is a bad headache.
BUY the shutter glasses and a good 19 inch monitor
U will love it.
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Kenny

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Posted on Tuesday, February 11, 2003 - 10:53 am:   Edit PostDelete PostView Post/Check IPPrint Post

Our 3D LCD Monitor will be announced Q2, we've made own software to easy create the 3D image(1024x768 & 1280x1024) on 3D LCD Monitor, just 5 minutes.
currently, the application just focused in the 3D demostration & 3D slide show .
for your reference.
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Anonymous

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Posted on Thursday, February 13, 2003 - 7:16 pm:   Edit PostDelete PostView Post/Check IPPrint Post

Kenny, Are you guys still in business? Do you have 3D shutter glasses anymore like the eye3D premium?
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Anonymous

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Posted on Wednesday, July 20, 2005 - 7:44 pm:   Edit PostDelete PostView Post/Check IPPrint Post

Greetings Very good web site. I loved it. Found invaluable information. Just what I was looking for :-)
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Anonymous

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Posted on Thursday, July 21, 2005 - 4:45 am:   Edit PostDelete PostView Post/Check IPPrint Post

I dont even remember how i reached your site but it doesnt matter, cause i'm so happy i found it, it really made me think, keep up the good work

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