Install

python virtual environment = pve For python packages and pve` creation

• i am using pipenv
• you can create your pve any way you want - the required packages are in xxx/req/py/base.in

be in the folder with Pipfile

• run pipenv install
  • to create pve with packages defined in Pipfile
• run pipenv install -r req/py/base.in
  • to recreate pve
  • update Pipfile with packages defined one per line in requirements text file

Dependencies

OpenCV with python3 bindings

compile

you can compile opencv (can take some time)

• this tutor is good

use the compiled library

• compilation creates cv2.so library which is to be used with the python
  • you have to link the library into your pve
    • step12
    • or something like this

ln -s /usr/local/lib/python3.5/dist-packages/cv2.so ~/path/to/pve/lib/python3.5/site-packages/cv2.so

in case of the pipenv it the venv dir is in ~/venvs/xxx-hash/

• save yourself a hassle
  • use function create_cv2_link from brain/script/.bashrc
  • only if you have ag - silversearcher installed

will not work if the cv2.so is named like this

• refer to the step9
• look for cv2*.so in /usr/local/lib

try out

import cv2

if you have numpy import error - you should first install the requirements into your pve - using pipenv or whatever