python之OpenCV的作用以及安装案例教程

alicedembp:~ alice$ pip3 install python-opencv
Collecting python-opencv
  Could not find a version that satisfies the requirement python-opencv (from versions: )
No matching distribution found for python-opencv
alicedembp:~ alice$ pip3 install opencv-python
Collecting opencv-python
  Downloading https://files.pythonhosted.org/packages/8d/ff/13e77ee7ac431f831e20d81a6bf0214ca1cf550cf9b575e3213e14325c81/opencv_python-4.1.0.25-cp37-cp37m-macosx_10_7_x86_64.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (52.1MB)
    100% |████████████████████████████████| 52.1MB 735kB/s 
Requirement already satisfied: numpy>=1.14.5 in /Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages (from opencv-python) (1.16.1)
Installing collected packages: opencv-python
Successfully installed opencv-python-4.1.0.25
alicedembp:~ alice$ 

alicedembp:~ alice$ python
Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 26 2018, 23:26:24) 
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more infORMation.
>>> import cv2
>>> 

alicedembp:~ alice$ python
Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 26 2018, 23:26:24) 
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>> cv2.__version__
'4.1.0'