Date: Mon, 04 Feb 2002 16:37:09 -0600

Author: John Power

Subject: Re: Way Cool Video Capture

Post:


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Hi Dale,

I have one quick quesiton about your setup. Was your camera's image
being displayed on the same monitor that it was pointed?

In pictures, was it A or B?

A) Camera looking at its own image:

------------- --------
| CAMERA |||||| | monitor|
------------- --------
|------------------------------|

B) Camera looking at a "3rd party" mointor:


------------- --------
| CAMERA |||||| | monitor|
------------- --------
^ ^
| |
| |
| |
------------- --------
| monitor| |CAMERA ||||||
------------- --------




Dale Stille wrote:

> Tappers,
>
> My assistant and I were doing a bit of videocapture for a class last
> friday when we came across a phenomenon that was just too cool. Our
> department has just purchased several computers with flat screens for
> testing in the labs and lectures. As we were setting up the apparatus, my
> assistant happened to point the video camera at the flat screen. Instead
> of the usual picture of the screen with the flickering / rolling sync
> signal that is usually seen, the flat screen gives you an "Infinity
> Mirror" ( PIRA #6A10.45 ) type effect. In other words, you see multiple
> images of the screen, with each sucessive image smaller that the one
> before it, and on and on. REALLY COOL!!!
>
> Knowing a little about flat screen technology and construction, this
> effect is not to surprising when I think about it. What does confuse me
> somewhat, is the fact that I can see the effect with the camera and not
> with my eyes. Anyone out there want to take a shot at an explaination.
> I imagine it has to do with persistance of vision, but would like a second
> opinion.
>
> Thanks, and we finally have snow in Iowa.
> Dale Stille
> U of Iowa

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Hi Dale,

I have one quick quesiton about your setup.  Was your camera's
image

being displayed on the same monitor that it was pointed?

In pictures, was it A or B?

A) Camera looking at its own image:

-------------                     
--------

| CAMERA  ||||||               
| monitor|

-------------                     
--------

      |------------------------------|

B) Camera looking at a "3rd party" mointor:

 

-------------                     
--------

| CAMERA  ||||||               
| monitor|

-------------                     
--------

      ^                                
^

      |                                 
|

      |                                 
|

      |                                 
|

-------------                  
--------

 | monitor|                  
|CAMERA  ||||||

-------------                  
--------

 

 

 

Dale Stille wrote:

Tappers,

My assistant and I were doing a bit of videocapture for a class last

friday when we came across a phenomenon that was just too cool. 
Our

department has just purchased several computers with flat screens for

testing in the labs and lectures.  As we were setting up the apparatus,
my

assistant happened to point the video camera at the flat screen. Instead

of the usual picture of the screen with the flickering / rolling sync

signal that is usually seen, the flat screen gives you an "Infinity

Mirror" ( PIRA #6A10.45 ) type effect.  In other words, you see
multiple

images of the screen, with each sucessive image smaller that the one

before it, and on and on.  REALLY COOL!!!

Knowing a little about flat screen technology and construction, this

effect is not to surprising when I think about it.  What does
confuse me

somewhat, is the fact that I can see the effect with the camera and
not

with my eyes.  Anyone out there want to take a shot at an explaination.

I imagine it has to do with persistance of vision, but would like a
second

opinion.

Thanks, and we finally have snow in Iowa.

Dale Stille

U of Iowa