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Subject: Re: Detecting colored objects
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
Date: Wed, 30 Oct 2002 00:13:55 -0800
NNTP-Posting-Date: Wed, 30 Oct 2002 00:11:16 MET
Organization: @Home Network
"Harry Dellamano" wrote in message
> 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??
In a cigarfactory I once had to design a subsystem for a system that sorted
tobacco by shade. That's about the same kind of thing you want to do.
That worked a bit more complicated; it used a stroboscope and a camera which
was connected to an PC with digital imaging/recognition software. The PC
would send out some data to another board that controlled the pneumatics to
eject the bad leaves.
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