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Need to find the centroid of a circular camera image

On Sunday 23 September 2018 16:24:23 Oscar Benjamin wrote:

> On Sun, 23 Sep 2018 at 20:45, Gene Heskett <gheskett at shentel.net> 
> > save the image and locate the centroid of that saved image.
> >
> > Is there code to do that centroid math in somebodies "bottom desk
> > drawer"? Something I could download and control with a bash script
> > which I'm fair at?
> This is easy enough to in OpenCV. The code at the top of this page
> does what you want:
> https://docs.opencv.org/3.4.2/dd/d49/tutorial_py_contour_features.html

I take it that this is python-2.7? code? 

Searching thru the python3 results in synaptic, on a stretch install on 
the rock64, python3 has not a p3 version of numpy or cv2.

And I'd like to try and make it run on 3.5 since that seems to be the 
newest on stretch. That would tend to future-proof this past the final 
fixes and eventual demise of python-2.

Is there hope for things like numpy and cv2 being ported to python 3? Or 
can numpy and cv2 be used against 3.5 as is?

Thanks Oscar.

Cheers, Gene Heskett
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