最近要用python做一些opencv的實驗，發現系統升級後（macOS Sierra 10.12.5），編譯opencv時提示Fatal error：QTKit.h not found。
改爲brew安裝。
1. python 2.7: brew install opencv
2. python 3.6: brew install opencv3 –with-python3 –with-contrib –without-python
3. export PYTHONPATH=$PYTHONPATH:/usr/local/lib/python3.6/site-packages:/usr/local/opt/opencv3/lib/python3.6/site-packages
沒有”–without-python”的話，會報錯“Error: opencv3: Does not support building both Python 2 and 3 wrappers”。備忘！