[chbot] TCS3200 anyone?

[Richard Jones]

I once designed a video motion detector using a CA3300 video flash
converter to write video into RAM on a character generator board. I'm sure
there is an open source video program somewhere that would be a good
starting point for doing edge detection and correlation on live video using
USB cameras as input. I think Hanno mentioned it some years back.

The Home Brew Robotics Club mailing list has covered lots of computer
vision projects over the years. You could try asking them.

Richard

On Thu, Apr 9, 2015 at 7:14 PM, Robin Gilks <robin at gilks.org> wrote:

> Greetings all
>
> We're 100kg into harvesting (and hence washing) walnuts and the next issue
> that needs to be automated is grading. Nuts with dark stains on the shell
> are quite often rotten but in any case they are only accepted by the
> processor as a low grade. Trouble is, a few duff nuts in a bag of good
> ones reduces the grade and hence price of the whole bag.
>
> Does anyone have experience with the TCS3200 programmable colour to
> frequency converter device? Looks pretty simple to interface to :)
>
> I'll be getting a few from here:
>
> http://www.aliexpress.com/item/Free-Shipping-5-pcs-lot-GY-31TCS230-TCS3200-Module-Color-sensors-Color-Recognition-Module-Color-Sensing/32315491284.html
> but I wonder how much these modules measure the spectrum of the LEDs
> rather than the object illuminated!
>
> I think the main issues will be mechanical ones - have the nuts travel
> slow enough to measure their colour and for the sorting gate to operate
> but quick enough to be able to process in a reasonable time.
>
> Avoid nut jams will also be an issue - whenever there is a hopper of
> product it will block the outlet irrespective of the outlet diameter
> (Murphy's 7th law - the other 6 all say the same!).
>
> Perhaps someone has done this sort of thing in a previous (or maybe even a
> current) life.
>
> --
> Robin Gilks
>
>
>
>
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