python3 安裝opencv3

在python3簡單地安裝opencv

1.確認安裝python3

打開cmd，在命令行輸入：

python

系統顯示：

Python 3.6.2 (v3.6.2:5fd33b5, Jul  8 2017, 04:57:36) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

這就確認了python3安裝版本正確（這裏用的是python3.6.2演示其他版本同理）

2.安裝opencv

重新以管理員模式打開cmd，（在確保聯網狀態下）在命令行輸入：

pip install opencv-python

經過處理pip會自動安裝opencv和所依賴的庫，這樣就好了

3.驗證是否正確安裝opencv

打開cmd，在命令行輸入：

pthon

Python 3.6.2 (v3.6.2:5fd33b5, Jul  8 2017, 04:57:36) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

import cv2

>>>

沒有報錯證明成功了

4.拓展 常見cmd中pip工具指令

Commands:
  install                     Install packages.
  download                    Download packages.
  uninstall                   Uninstall packages.
  freeze                      Output installed packages in requirements format.
  list                        List installed packages.
  show                        Show information about installed packages.
  check                       Verify installed packages have compatible dependencies.
  search                      Search PyPI for packages.
  wheel                       Build wheels from your requirements.
  hash                        Compute hashes of package archives.
  completion                  A helper command used for command completion.
  help                        Show help for commands.

使用方式：pip [Commands]