Edge World
Comments and Opinions

Please feel welcome to E-Mail your opinion or comments as to what the images in Edge World are. I truly have no idea what these images are.

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Date: Sun, 05 Sep 1999 11:56:01 -0400
From: Jeffrey Gross <jgross@netaxs.com>
To: jk@2near.com
Subject: Your images

Hi there,

I saw your images. I have to tell you what you are seeing, but first, a quick story,

Back in the early 80's when video production equipment was primitive, we used to place a title on a screen, and then point a camera at a monitor with the title, and then mix in the video from the camera to get a feedback. This was done in a dark room.

As an engineer, I can tell you that video screens, even though dark without signal, will emit some light. A camera pointed at this screen, who's output goes directly to the screen in a wide open fashion will eventually break into oscillation. This is what you are seeing. The small quantity of light emitting from the screen is slowly added onto itself, and eventually builds up enough additive quantity to break into video feedback. That's what you see. You are essentially amplifying the photons from the screen until it breaks over a feedback threshold.

Try this:
If you stand in a completely dark room for about a half hour with a video screen running, but dark without signal, you will begin to see that it is in fact emitting some light from the screen. Cover the screen with a dark cloth, and wait till your eyes adjust to the darkness, then pull the cover and you'll see the difference.

I've worked on systems for training soldiers to see in relatively little to no light. I've experimented using video systems to do this training, and have not been able to get the screens and video projectors to be dark enough to do the job. We ultimately abandoned the project.

I don't mean to burst your bubble, but you need to have technical facts before you assume you have "Spirits" or "worlds". This is akin to what we used to do in the early days of video for lack of better effects generators.

Jeff Gross


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