[chbot] TCS3200 anyone?

[Peter Ellens]

Like opencv. http://opencv.org/

Open source computer vision

Edge detection example.
http://docs.opencv.org/doc/tutorials/imgproc/imgtrans/canny_detector/canny_detector.html

On 09/04/15 22:34, Richard Jones wrote:
> 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 
> <mailto: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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