Don't forget Visbox. They build high end displays using commodity projectors and PCs. You can get all the performance of a Fakespace or Barco system at a fraction of the price.
Actually, a little bit of disparity between the images isn't that big of a deal as long as it's horizontal. It will only cause a small change in the perceived depth of the objects. If projectors with lens shift are used, the aligment issue goes away for the most part.
Today the tag "3D" has a fuzzy meaning, but it is usually interpreted to mean mere stereopsis: artificial illusion created by presenting each eye a differing perspective of am in image.
There's nothing artificial about stereopsis. It's a powerful cue to depth and anyone who has two working eyes uses it every day. While it's true that there can be a cue conflict between accomodation and vergence, vergence will win. Of course stereopsis adds information. You would only have one eye if it didn't. I can see why you posted this BS as an AC. Sadly, the moderators don't know any better.
I just bought a T41p. It's an incredibly nice machine. The graphics are very fast and it's built like a tank. 5 lbs. and a 5+ hr. battery life. I've never seen another laptop that can compare to a ThinkPad. It's pricey, but you get what you pay for.
Do you mean to say that someone in your house is blind & deaf? How do you communicate? Just curious...
Re:VESA is not a resoulution
on
Duke3d in Linux
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· Score: 1
VESA did come up with a pre-PCI bus, but it's best known among users for standardizing the timings for video signals that weren't created by IBM (EGA, VGA, XGA, etc.) Check out www.vesa.org .
Yes, that's probably what he's saying, and if so, he's absolutely correct. I don't know where you're getting this information about non-square pixels, but it doesn't make much sense. It's much more likely that your math is wrong. In any case, this particular panel that we're talking about does have square pixels. According to Samsung's specs, the active area is 331.2mm x 207.0mm and the pixel pitch is 0.1725mm. Multiply it out and you'll see that the pixels are square. By the way, the model number of the panel is LTN154UXGA. I'd like to see you come up with a panel that has non-square pixels. This is yet another case of the clueless modding up the misinformed.
Re:Let's have flat *reflective* LEDs
on
Thin, Flat LEDs
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· Score: 1
No problem, dude. I didn't mean to rip into you, but there's just so much bad info on Slashdot these days...
Right, these are called transreflective LCDs. My Ipaq has one. The problem I see with them is that you need a lot of light from the front it order to get a good image. Indoor lighting is usually too dim. A few years back I saw a rugged tablet-pc like thing with a VGA transreflective screen. Never seen one with higher resolution, but there's probably no technical reason it couldn't be done.
Re:Let's have flat *reflective* LEDs
on
Thin, Flat LEDs
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· Score: 2, Insightful
Do you know what LED stands for? Light Emitting Diode. *Emitting*. A reflective emitter makes about as much sense as dry water. You clearly have no idea about how LEDs work and the fact that you've been modded up means no one else does either.
Just how long do you think it takes to bring a cow from a calf to a hamburger? It's just a matter of a few months. If all the cows in the world were sterilized today, there'd be no Big Macs by the 4th of July. There wouldn't be any animals discarded; there just wouldn't be any new ones born. You can't harm an unborn animal.
Do you think that the one cow just magically appeared? It takes about 10 pounds of vegetable matter to create 1 pound of meat. By your own logic, carnivores are 10 times as cruel as vegetarians. Try again.
Read the article. This isn't a "camera jammer". It's just a way to make the recording of a movie from a theater screen have artifacts that will make it unwatchable. It has no effect on camcorders in the real world.
Camcorders have an IR cutoff filter in them which blocks most of the IR. Color video looks terrible if this filter is removed. You'd need to blast a HUGE amount of IR for this to work.
This is wrong in so many ways, I don't know where to start. The projectors for a CAVE are completely different from the ones used for the Geowall. They are usually big CRT projectors that cost around $20k a piece. If you are one of the lucky few that have 3-chip DLP projectors like the Mirage, they cost you at least $50k a piece. These are for field sequential stereo and aren't using any kind of "NVIDIA trick".
If you are using a magnetic tracker you don't have "hundreds of pounds of shielding, permanent magnets, electromagnets, etc". There is a transmitter that's about 1' cubed in size and several 1" cubed sensors. Metal tends to interfere with the tracking due to induced currents, so you want for there to be a little metal around your tracked area as possible. The 6 sided CUBE at the Beckman Insitute at UIUC is made completely out of wood for this very reason. There's usually only one transmitter and it doesn't have to be positioned very carefully. All the XYZHPR readings from the sensors are relative to the transmitter, so you just have to calibrate it once and you're good to go. Also, a magnetic tracker doesn't cost anywhere near $100k. More like $20k. Check out Ascension for their Flock of Birds which is the most commonly used magnetic tracker for immersive displays. Now, if you're using something like the InterSense tracker with their nifty new wireless sensors, it can get pretty pricy, though probably still under $100k.
If your screen perfectly depolarizes the light, then you're right. Most screens do let through some amount of polarized light, though. You'll see color shifts as you tilt your head when looking through LCD shutter glasses at the image from an LCD projector. When you're using shutter glasses it's called active stereo because the glasses are actively blocking and unblocking each eye. Passive stereo is when your glasses are just chunks of plastic. In order to do active stereo you need a projector that has a vertical refresh of at least 96 Hz so that each eye can get 48 Hz. LCD projectors can only refresh at 60 Hz, so each eye only gets 30 Hz which isn't nearly enough (lots of flicker).
I'm certain that the CAVE you used was not using LCD projectors. There is no current LCD projector that is capable of active stereo. Also the polarizers in the glasses would interfere with the polarizers in the LCD projectors. LCD shutter glasses have the same sort of polarizers as the passive polarizing glasses.
That's just wrong. All you needed was a DVI-D to DVI-D cable. The DVI-I connector can accept either type because it has all the pins for both DVI-D and DVI-A. Most projectors and LCD monitors that have DVI-I connectors will come with a DVI-I to VGA cable and a DVI-D to DVI-D cable.
Slashdot Mirror
Don't forget Visbox. They build high end displays using commodity projectors and PCs. You can get all the performance of a Fakespace or Barco system at a fraction of the price.
Actually, a little bit of disparity between the images isn't that big of a deal as long as it's horizontal. It will only cause a small change in the perceived depth of the objects. If projectors with lens shift are used, the aligment issue goes away for the most part.
Those Lithium Manganese batteries aren't rechargable.
Today the tag "3D" has a fuzzy meaning, but it is usually interpreted to mean mere stereopsis: artificial illusion created by presenting each eye a differing perspective of am in image.
There's nothing artificial about stereopsis. It's a powerful cue to depth and anyone who has two working eyes uses it every day. While it's true that there can be a cue conflict between accomodation and vergence, vergence will win. Of course stereopsis adds information. You would only have one eye if it didn't. I can see why you posted this BS as an AC. Sadly, the moderators don't know any better.
It was about $3200 for model 2373GEU w/1GB RAM.
I just bought a T41p. It's an incredibly nice machine. The graphics are very fast and it's built like a tank. 5 lbs. and a 5+ hr. battery life. I've never seen another laptop that can compare to a ThinkPad. It's pricey, but you get what you pay for.
There are at least 2 projectors that do 1920x1080, but they aren't cheap.
Sanyo HD-10
JVC QX1G
There is also at least one RPTV that has 1080 LCOS panels in it. Hitachi maybe?
Are there any high tech things that are used to communicate with the deaf blind? Writing on the forehead is pretty low bandwidth. :)
Do you mean to say that someone in your house is blind & deaf? How do you communicate? Just curious...
VESA did come up with a pre-PCI bus, but it's best known among users for standardizing the timings for video signals that weren't created by IBM (EGA, VGA, XGA, etc.) Check out www.vesa.org .
Yes, that's probably what he's saying, and if so, he's absolutely correct. I don't know where you're getting this information about non-square pixels, but it doesn't make much sense. It's much more likely that your math is wrong. In any case, this particular panel that we're talking about does have square pixels. According to Samsung's specs, the active area is 331.2mm x 207.0mm and the pixel pitch is 0.1725mm. Multiply it out and you'll see that the pixels are square. By the way, the model number of the panel is LTN154UXGA. I'd like to see you come up with a panel that has non-square pixels. This is yet another case of the clueless modding up the misinformed.
No problem, dude. I didn't mean to rip into you, but there's just so much bad info on Slashdot these days...
Right, these are called transreflective LCDs. My Ipaq has one. The problem I see with them is that you need a lot of light from the front it order to get a good image. Indoor lighting is usually too dim. A few years back I saw a rugged tablet-pc like thing with a VGA transreflective screen. Never seen one with higher resolution, but there's probably no technical reason it couldn't be done.
Do you know what LED stands for? Light Emitting Diode. *Emitting*. A reflective emitter makes about as much sense as dry water. You clearly have no idea about how LEDs work and the fact that you've been modded up means no one else does either.
Just how long do you think it takes to bring a cow from a calf to a hamburger? It's just a matter of a few months. If all the cows in the world were sterilized today, there'd be no Big Macs by the 4th of July. There wouldn't be any animals discarded; there just wouldn't be any new ones born. You can't harm an unborn animal.
Do you think that the one cow just magically appeared? It takes about 10 pounds of vegetable matter to create 1 pound of meat. By your own logic, carnivores are 10 times as cruel as vegetarians. Try again.
The IR laser idea is better than IR floodlights, but it could still be defeated by putting a quality IR-cut filter in front of the camera lens.
What would stop the pirate from screwing an IR-cut filter on to the front of his camcorder to supplant the one that is already inside it?
Read the article. This isn't a "camera jammer". It's just a way to make the recording of a movie from a theater screen have artifacts that will make it unwatchable. It has no effect on camcorders in the real world.
Camcorders have an IR cutoff filter in them which blocks most of the IR. Color video looks terrible if this filter is removed. You'd need to blast a HUGE amount of IR for this to work.
This is wrong in so many ways, I don't know where to start. The projectors for a CAVE are completely different from the ones used for the Geowall. They are usually big CRT projectors that cost around $20k a piece. If you are one of the lucky few that have 3-chip DLP projectors like the Mirage, they cost you at least $50k a piece. These are for field sequential stereo and aren't using any kind of "NVIDIA trick".
If you are using a magnetic tracker you don't have "hundreds of pounds of shielding, permanent magnets, electromagnets, etc". There is a transmitter that's about 1' cubed in size and several 1" cubed sensors. Metal tends to interfere with the tracking due to induced currents, so you want for there to be a little metal around your tracked area as possible. The 6 sided CUBE at the Beckman Insitute at UIUC is made completely out of wood for this very reason. There's usually only one transmitter and it doesn't have to be positioned very carefully. All the XYZHPR readings from the sensors are relative to the transmitter, so you just have to calibrate it once and you're good to go. Also, a magnetic tracker doesn't cost anywhere near $100k. More like $20k. Check out Ascension for their Flock of Birds which is the most commonly used magnetic tracker for immersive displays. Now, if you're using something like the InterSense tracker with their nifty new wireless sensors, it can get pretty pricy, though probably still under $100k.
If your screen perfectly depolarizes the light, then you're right. Most screens do let through some amount of polarized light, though. You'll see color shifts as you tilt your head when looking through LCD shutter glasses at the image from an LCD projector. When you're using shutter glasses it's called active stereo because the glasses are actively blocking and unblocking each eye. Passive stereo is when your glasses are just chunks of plastic. In order to do active stereo you need a projector that has a vertical refresh of at least 96 Hz so that each eye can get 48 Hz. LCD projectors can only refresh at 60 Hz, so each eye only gets 30 Hz which isn't nearly enough (lots of flicker).
I'm certain that the CAVE you used was not using LCD projectors. There is no current LCD projector that is capable of active stereo. Also the polarizers in the glasses would interfere with the polarizers in the LCD projectors. LCD shutter glasses have the same sort of polarizers as the passive polarizing glasses.
Are there any cameras currently available that use this sensor?
That's just wrong. All you needed was a DVI-D to DVI-D cable. The DVI-I connector can accept either type because it has all the pins for both DVI-D and DVI-A. Most projectors and LCD monitors that have DVI-I connectors will come with a DVI-I to VGA cable and a DVI-D to DVI-D cable.