在树莓派上安装OpenCV-Python

安装OpenCV-Python可以通过以下步骤在树莓派上完成：

1. 安装依赖项：

sudo apt-get update
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

2. 下载OpenCV：

cd ~
wget -O opencv.zip https://github.com/opencv/opencv/archive/4.0.0.zip
wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/4.0.0.zip
unzip opencv.zip
unzip opencv_contrib.zip

3. 创建并进入构建目录：

cd ~/opencv-4.0.0/
mkdir build
cd build

4. 配置OpenCV：

cmake -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-4.0.0/modules \
    -D ENABLE_NEON=ON \
    -D ENABLE_VFPV3=ON \
    -D BUILD_TESTS=OFF \
    -D INSTALL_PYTHON_EXAMPLES=OFF \
    -D BUILD_EXAMPLES=OFF ..

5. 编译并安装OpenCV：

make -j4
sudo make install
sudo ldconfig

6. 验证OpenCV是否安装成功：

python
import cv2
print(cv2.__version__)

如果没有报错，就说明OpenCV-Python已经安装成功了。