On Monday 24 September 2018 18:47:08 Dennis Lee Bieber wrote: > On Mon, 24 Sep 2018 12:06:19 -0400, Gene Heskett > <ghesk...@shentel.net> > > declaimed the following: > >On Monday 24 September 2018 10:55:23 Chris Angelico wrote: > >> On Tue, Sep 25, 2018 at 12:54 AM Gene Heskett > >> <ghesk...@shentel.net> > > > >wrote: > >> > On Sunday 23 September 2018 16:24:23 Oscar Benjamin wrote: > >> > > On Sun, 23 Sep 2018 at 20:45, Gene Heskett > >> > > <ghesk...@shentel.net> > >> > > >> > wrote: > >> > > > 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_featur > >> > >es. 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? > >> > >> Dunno about cv2, but numpy is certainly available for Python 3. > > > >What do they call it in debian stretch for arm64? > > Well, in Raspbian they show up as... > > > Linux raspberrypi 4.14.69-v7+ #1141 SMP Mon Sep 10 15:26:29 BST 2018 > armv7l > Thats a 32 bit kernel, the rt version has been tried and found wanting, very high throwaway percentages for keyboard and mouse events.
> The programs included with the Debian GNU/Linux system are free > software; the exact distribution terms for each program are described > in the individual files in /usr/share/doc/*/copyright. > > Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent > permitted by applicable law. > Last login: Fri Sep 14 12:36:56 2018 from > fe80::c932:bd85:577:9922%eth0 pi@raspberrypi:~$ python3 --version > Python 3.5.3 > pi@raspberrypi:~$ python3 > Python 3.5.3 (default, Jan 19 2017, 14:11:04) > [GCC 6.3.0 20170124] on linux > Type "help", "copyright", "credits" or "license" for more information. > > >>> import numpy > > I don't remember installing numpy -- it just seems to be there... > > pi@raspberrypi:~$ sudo apt search numpy > Sorting... Done > Full Text Search... Done > > <SNIP EXTRANEOUS> > > > python3-bottleneck/stable 1.2.0-6 armhf > Fast NumPy array functions written in C - Python 3 > > <SNIP> > > python3-numexpr/stable 2.6.1-4 armhf > Fast numerical array expression evaluator for Python 3 and NumPy > > python3-numexpr-dbg/stable 2.6.1-4 armhf > Fast numerical array expression evaluator for Python 3 and NumPy > (debug ext) > > python3-numpy/stable,now 1:1.12.1-3 armhf [installed] > Fast array facility to the Python 3 language > > python3-numpy-dbg/stable 1:1.12.1-3 armhf > Fast array facility to the Python 3 language (debug extension) > > python3-numpydoc/stable 0.6.0+ds1-1 all > Sphinx extension to support docstrings in Numpy format -- Python3 > > <SNIP> > > python3-rasterio/stable 0.36.0-1+b2 armhf > Python 3 API for using geospatial raster data with Numpy > > python3-scipy/stable 0.18.1-2 armhf > scientific tools for Python 3 > > python3-scipy-dbg/stable 0.18.1-2 armhf > scientific tools for Python 3 - debugging symbols > > python3-seaborn/stable 0.7.1-4 all > statistical visualization library > > python3-snuggs/stable 1.4.1-1 all > S-expressions for numpy - Python 3 version > > <SNIP MORE EXTRANEOUS> > > > Only hits for cv2 are Java > > pi@raspberrypi:~$ sudo apt search cv2 > Sorting... Done > Full Text Search... Done > libcv2.4/stable 2.4.9.1+dfsg1-2 all > computer vision library - libcv* translation package > > libopencv2.4-java/stable 2.4.9.1+dfsg1-2 all > Java bindings for the computer vision library > > libopencv2.4-jni/stable 2.4.9.1+dfsg1-2 armhf > Java jni library for the computer vision library > > pi@raspberrypi:~$ > > However, Raspbian is 32-bit Debian-based. I don't know what would be > needed to configure/install a pure 64-bit Debian on the RPi-3. > In all likelyhood, it won't be running on the pi-3b, but on a rock64, which is arm64. So its called armbian. > > > -- > Wulfraed Dennis Lee Bieber AF6VN > wlfr...@ix.netcom.com HTTP://wlfraed.home.netcom.com/ On the rock64, python has numpy but not cv2, python3 has neither. And doesn't have pip or pip3 in the repo's. But on a swag, it did install python-cv2*, so maybe it will run this stuff after all. But despite a "sudo apt install cv2" pulling in 30 some packages, cv2 is not available to import, at least not by that name.. I might have to use a broken pi 3b, I think it has a blown gpio pin, but it otherwise still ran the last time it was powered up. All I need to do is find it. In that mess, it could be a chore. Organization has never been a strong point of mine... Thanks Dennis. -- Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> -- https://mail.python.org/mailman/listinfo/python-list
