3 ms·

Automatically calibrating a computer projector image

52 points by ranit8 15y ago

apu 15y ago
For a more technical description of the best algorithms to do this (and more advanced compensation) automatically, see: http://www.cs.columbia.edu/CAVE/projects/pr_any/ http://www.cs.columbia.edu/CAVE/projects/pr_any/ BTW, these algorithms have been well understood and described by the research community for many years now. I think some companies targeting the high-end segment have incorporated some of these techniques, but I'm not sure why it's not filtered down into low-end consumer tech yet. Actually, I think there's easily a startup or two in using your smartphone to calibrate a projector. The math would only have to be slightly modified, and if you could make this process seamless, it would be pretty cool.
xxbondsxx 15y ago
Really awesome technology, unfortunate soundtrack to the _entire_ video.
robert-boehnke 15y ago
Reminds me of the work by Johnny Lee on projector calibration. His appears to be a bit faster. http://johnnylee.net/projects/thesis/ http://johnnylee.net/projects/thesis/
- mmastrac 15y ago
  According to this page, it's related work: "This project is an update on a previous rig I did in 2011. The original project was inspired ("Reverse-engineered") from a paper published in 2004 by Johnny Chung Lee"
barcoder 15y ago
You might also be interested to see a tree projection mapped: http://www.kimchiandchips.com/littree.php http://www.kimchiandchips.com/littree.php
hebejebelus 15y ago
I almost don't see why this can't be realtime. I imagine from here, all you need to do is throw more computing power at it? It's very cool. Imagine this plus a head-mounted pico-projector - any scrap of paper or wall could become an interface. Very excited about this technology.
- siera 15y ago
  It can be done in real time. Here is a demonstration from Float4 Interactive : http://www.youtube.com/watch?v=q_YOTZ4MCuA http://www.youtube.com/watch?v=q_YOTZ4MCuA
joshu 15y ago
Doesn't really need an active board. You could have a camera + projector and a board with fiducal marks.

52 points by ranit8 15y ago

apu 15y ago

For a more technical description of the best algorithms to do this (and more advanced compensation) automatically, see: http://www.cs.columbia.edu/CAVE/projects/pr_any/ http://www.cs.columbia.edu/CAVE/projects/pr_any/ BTW, these algorithms have been well understood and described by the research community for many years now. I think some companies targeting the high-end segment have incorporated some of these techniques, but I'm not sure why it's not filtered down into low-end consumer tech yet. Actually, I think there's easily a startup or two in using your smartphone to calibrate a projector. The math would only have to be slightly modified, and if you could make this process seamless, it would be pretty cool.

xxbondsxx 15y ago

Really awesome technology, unfortunate soundtrack to the _entire_ video.

robert-boehnke 15y ago

Reminds me of the work by Johnny Lee on projector calibration. His appears to be a bit faster. http://johnnylee.net/projects/thesis/ http://johnnylee.net/projects/thesis/

mmastrac 15y ago
According to this page, it's related work: "This project is an update on a previous rig I did in 2011. The original project was inspired ("Reverse-engineered") from a paper published in 2004 by Johnny Chung Lee"

barcoder 15y ago

You might also be interested to see a tree projection mapped: http://www.kimchiandchips.com/littree.php http://www.kimchiandchips.com/littree.php

hebejebelus 15y ago

I almost don't see why this can't be realtime. I imagine from here, all you need to do is throw more computing power at it? It's very cool. Imagine this plus a head-mounted pico-projector - any scrap of paper or wall could become an interface. Very excited about this technology.

siera 15y ago
It can be done in real time. Here is a demonstration from Float4 Interactive : http://www.youtube.com/watch?v=q_YOTZ4MCuA http://www.youtube.com/watch?v=q_YOTZ4MCuA

joshu 15y ago

Doesn't really need an active board. You could have a camera + projector and a board with fiducal marks.