在树莓派3中安装openCV失败

Question

当我尝试在RAspberry Pi 3 B+中安装OpenCV时，出现以下错误：

$pip install opencv-python

Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
ERROR: Could not find a version that satisfies the requirement opencv-python (from versions: 
none)
ERROR: No matching distribution found for opencv-python

我也尝试过其他方法：

pip install opencv-contrib-python
pip3 install opencv-python
python3.6 -m pip install opencv-python

所有这些都给出了相同的上述错误！

我尝试了其他几种方法：

sudo apt install python3-opencv
sudo apt-get install libopencv-dev python-opencv

仍然无法导入cv2

ModuleNotFoundError: No module named 'cv2'

我试过menpo频道

conda install -c menpo opencv
PackagesNotFoundError: The following packages are not available from current channels:

请帮帮忙。现在该怎么办？

Answer 1

OpenCv目前在Raspbian9-Stretch上工作。更新os系统：

sudo apt-get update
sudo apt-get upgrade

2)安装依赖项：

sudo apt-get install build-essential cmake pkg-config
sudo apt-get install libjpeg-dev libtiff5-dev libjasper-dev libpng12-dev
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev
sudo apt-get install libxvidcore-dev libx264-dev
sudo apt-get install libgtk2.0-dev libgtk-3-dev
sudo apt-get install libatlas-base-dev gfortran

3)安装Python3和Pip3：

sudo apt-get install python3-dev
sudo apt-get install python3-pip

4)安装Opencv：

pip3 install opencv-python

5) Opencv和摄像头的额外依赖：

sudo apt-get install libqtgui4
sudo modprobe bcm2835-v4l2
sudo apt-get install libqt4-test

瞧！已安装OpenCv2。