Film-Tech Forum ARCHIVE: Automatic Projector Calibration

This is topic Automatic Projector Calibration in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=009219

Posted by Patrick Dunn (Member # 3333) on 03-31-2008, 02:15 PM:

YouTube: Automatic Calibration

This is very cool. Using sensors behind a screen to keep digital images from being distorted.

This could be extremely useful for installing digital projectors they could have the film projector dead center and the digital projector off to the side, or far out of the way and neither image will be distorted, or one side out of focus.

Posted by Tim Reed (Member # 137) on 03-31-2008, 02:36 PM:

tick...tick...tick...

Posted by Monte L Fullmer (Member # 2797) on 03-31-2008, 07:30 PM:

yea..delete this and goto "Yak" section and put this post in the "video of an insane man.."

Posted by Mark Gulbrandsen (Member # 72) on 03-31-2008, 07:30 PM:

Bravo! I can see its usefulness in 3-D viewing surface alignment and in multi projector installations like video walls. It'll eliminate all the alignment headache that video walls always have had!!! Excellent job... I think he gets the PHD...

And, personally I think it does deserve a thread of its own... its very unique and anyone thats ever set up a video wall knows what I am talking about.

Mark

Posted by Peter Castle (Member # 1997) on 04-01-2008, 05:48 PM:

I think it may be jumping the gun a little to see this as a great achievement in projector alignment. That's not what I think they are doing. There's no connection to the projector but the video signal. All that's happening is the image being sent to the projector is being scaled to fit by the computer, leaving all that waste projector power projecting black.

Now if only projectors could be adjusted in less than 1 second. . . .

Posted by Tristan Lane (Member # 1169) on 04-01-2008, 07:37 PM:

In response to the above comment: It's not just scaling the image, it is compensating for keystoning and is able to track movement of the image surface and atapt in real time. I believe he was trying to demonstrate the accuracy of the alignment system by using a much smaller image surface.

I wouldn't play it down too much. I'm sure real-world uses would make sure to utilize as much of the projector as possible.

Posted by Patrick Dunn (Member # 3333) on 04-01-2008, 10:25 PM:

quote: Peter Castle
I think it may be jumping the gun a little to see this as a great achievement in projector alignment. That's not what I think they are doing. There's no connection to the projector but the video signal. All that's happening is the image being sent to the projector is being scaled to fit by the computer, leaving all that waste projector power projecting black.

You wouldn't really have to worry about projection a lot of black if you just have the projector projecting a little bit bigger than the screen. I wasn't thing much about scaling the image as i was keeping it undistorted.