Re: pinhole color addition

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From: Andria Erzberger (alerzberger@lbl.gov)
Date: Thu Apr 17 2003 - 08:52:22 PDT 

Date: Thu, 17 Apr 2003 08:52:22 -0700
Subject: Re: pinhole color addition
From: Andria Erzberger <alerzberger@lbl.gov>
Message-Id: <93A123B0-70EC-11D7-BA69-0003936AF624@lbl.gov>

This does the 3 primary colors:
http://www.phy.ntnu.edu.tw/java/image/rgbColor.html
This does shadows with the 3 primary colors:
http://www.phy.ntnu.edu.tw/java/shadow/shadow.html

You might also like some web pages which tell the RGB values for many
colors. For instance red gets 2 digits 0-9, then A-F. So, 00 would be
no red, and FF would be maximum red. See:
http://WWW.HTMLHELP.COM/cgi-bin/color.cgi and many others.
Andi

On Thursday, April 17, 2003, at 08:32 AM, Eric Plett wrote:

> Hello Pinholers,
>
> At the Exploratorium TI - physics, light, we used one exhibit where you
> could control different levels of primary colors (red, blue, and
> green) to
> produce any other color. I have made the set up with light bulbs but
> those
> of you who have them know that there are limitations. I now have a
> projector in my room that is connected to my computer (including
> internet)
> and shows on a big screen. I'd like to use it to show colors via my
> computer. I remember some of the teachers saying that there were
> other ways
> of accessing this type of color addition either on the internet or
> even on
> any computer. Can someone help me out? Where can I find this
> function?
>
> Eric Plett
>
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>
>
>
Andria Erzberger
Lawrence Berkeley Natl. Lab
510-486-6610
510-520-8655 cell

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