From: Duane Bozarth
Subject: Re: Detecting colored objects
Date: Wed, 30 Oct 2002 08:36:49 -0600
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Harry Dellamano wrote:
> wrote in message
> > I am not clear on where the 11 colors come from. Are we talking about the
> > white-tan-brown dimension of ordinary eggs, or something more subtle?
> > Color as seen by humans has 3 dimensions: Red, Green, and Blue, or
> > Hue, Saturation and Value, or some other system. Has somebody
> > documented for you what the 11 colors are? If not, you need the
> > temporary use of some equipment such as a spectrophotometer or
> > colorimeter to clarify the problem.
> > Jim W.
> Jim, thanks for replying.
> The objects are not really eggs but similar objects painted solid colors
> for easy visual identification. This must be done electronically on the fly,
> lets say moving 0.5 feet / second.
> How do I use the spectrophotometer or colorimeter to clarify the problem?
In addition to the other comments look for "color matching" or "control"
for printing applications--very similar problem and there are quite a
few sensors for controlling/monitoring printing presses available. It's
been long enough since I did a system for a custom print shop that I've
even forgotten the particular manufacturer, but it was done w/off the
shelf hardware and a PC moderately easily seven or eight years ago with
a much more wide-ranging color matching problem.