UbOpenCV 编译和安装

1.环境

• OS： Ubuntu18.04 / Debian 10

• OpenCV version： 3.4.15

• Board: RK3399

2.编译和安装

1. 搭建python3.7虚拟环境

   # 依次安装gcc和cmake等编译环境
   # 安装python3.7-tk 和 python3.7-dev
   # 安装virtualenv虚拟环境
   sudo apt install gcc cmake git build-essential \
   python3-tk python3.7-dev \
   virtualenv
   

2. 创建python3.7虚拟环境

   virtualenv -p /usr/bin/python3.7m /home/firefly/venv
   # 使用虚拟环境，如果想退出可以在终端输入 deactivate
   source /home/firefly/venv/bin/activate
   

3. 安装Opencv所需的环境包

   # 安装编译环境、gtk包和相关编解码库
   sudo apt install cmake build-essential libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libdc1394-22-dev libjasper-dev
   
   # 注意！如果安装了rknn_toolkit(or lite)则不需要再安装Python-numpy，否则会导致rknn_toolkit(or lite)无法使用
   sudo apt install python-numpy
   

4. 下载Opencv

   # 创建文件夹
   mkdir opencv
   cd opencv
   
   # 下载 opencv-3.4.15.zip
   wget https://github.com/opencv/opencv/archive/refs/tags/3.4.15.zip
   unzip opencv-3.4.15.zip
   

5. 配置

   mkdir build
   cd build
   
   # 让 OpenCV 和 Python3 之间建立联系
   cmake -D CMAKE_BUILD_TYPE=RELEASE \
   -D 	PYTHON_DEFAULT_EXECUTABLE=$(python -c "import sys; print(sys.executable)")\
   -D PYTHON3_EXECUTABLE=$(python -c "import sys; print(sys.executable)")  \
   -D PYTHON3_NUMPY_INCLUDE_DIRS=$(python -c "import numpy; print (numpy.get_include())")  \
   -D PYTHON3_PACKAGES_PATH=$(python -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")  \
   ../opencv-3.4.15
   

6. 如需支持Gstreamer API，则进行以下配置操作否则跳过

   sudo apt install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev
   cmake -D WITH_GSTREAMER=ON ../opencv-3.4.15
   

7. 编译安装# 如果板子内存不超过2G，建议不超过-j4

   make -j6
   # 安装的过程需要sudo权限
   sudo make install