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From: "Frank Bemelman"
Subject: Re: Detecting colored objects
Date: Wed, 30 Oct 2002 18:50:28 +0100
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
Organization: EuroNet Internet
NNTP-Posting-Date: 30 Oct 2002 16:55:22 GMT
"Harry Dellamano" schreef in bericht
> I would like to candle eggs that have 11 possible solid colors rolling
> an assembly line. Once the color is determined a microprocessor will drop
> them into the correct bin. I do not know the best way to detect color on
> fly. It would be nice if a photocell would put out different current
> that can be calibrated and detected by a threshold detector. Once I get by
> the light to electronic transducer I am home free. What is the best photo
> detector and light source for this job??
If you can't buy something 'off the shelf' I'd use a color camera with
analog RGB outputs, 3 window-comparators with 6 potentiometers to set
the level for red, green and blue, and some logic. Or sample the
RGB values into a uC and let the software figure it out.
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