树莓派 4B下python3+opencv 安装教程

1. 下载opencv-python的whl文件

下载python3对应的版本opencv_python-4.1.0.25-cp37-cp37m-linux_armv7l.whl， 其中cp37表示python3.7

2. 下载opencv依赖库

sudo apt-get install libcblas-dev libatlas-base-dev libjasper-dev libqt4-test libqtgui4 

有的可能需要以下依赖库

sudo apt-get install libhdf5-dev libhdf5-serial-dev

3. 安装opencv

sudo pip3 install opencv_python-4.1.0.25-cp37-cp37m-linux_armv7l.whl

4. 查看安装是否成功

pi@raspberrypi:~/python $ python3
Python 3.7.3 (default, Jul 25 2020, 13:03:44)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>>

大功告成！