[Ubuntu 20.04][Anaconda3]OpenCV-4.7.0安装

Nvidia Tao 4.0.1 默认安装python为3.6不支持最新Opencv 需更新为python3.7 但是Tao不支持3.7版本 https://visionguide.readthedocs.io/zh_CN/latest/opencv/configure/4.4.0/安装/

安装文档

• OpenCV installation overview

• OpenCV configuration options reference

• Installation in Linux

依赖

安装以下依赖文件，其中使用Anaconda安装Python相关依赖：

# For C++
[compiler] sudo apt-get install build-essential
[required] sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
[optional] sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev
# For Python
pip install numpy
[required] sudo apt install cmake gcc g++ libavcodec-dev libavformat-dev libswscale-dev libgstreamer-plugins-base1.0-dev libgstreamer1.0-dev libgtk2.0-dev libgtk-3-dev
[optional] sudo apt-get install libpng-dev libjpeg-dev libopenexr-dev libtiff-dev libwebp-dev

源码

同一路径下下载OpenCV以及OpenCV_Contrib源码

$ git clone https://github.com/opencv/opencv.git
$ git clone https://github.com/opencv/opencv_contrib.git

切换到4.4.0版本

$ cd opencv

编译

在opencv/opencv_contrib同一路径下新建文件夹build/install，分别用于存放构建文件以及编译文件

$ mkdir build
$ mkdir install
$ ls
build  install  opencv  opencv_contrib

官网给出的安装流程如下：

# Install minimal prerequisites (Ubuntu 18.04 as reference)
sudo apt update && sudo apt install -y cmake g++ wget unzip
# Download and unpack sources
wget -O opencv.zip https://github.com/opencv/opencv/archive/4.x.zip
wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/4.x.zip
unzip opencv.zip
unzip opencv_contrib.zip
# Create build directory and switch into it
mkdir -p build && cd build
# Configure
cmake -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-4.x/modules ../opencv-4.x
# Build
cmake --build .

在Configure阶段，我增加了一些安装选项，包括安装路径、Python安装等

cmake -D CMAKE_INSTALL_PREFIX=../install \
                -D OPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules \
                -D BUILD_opencv_python3=ON \
                -D PYTHON3_EXECUTABLE=~/anaconda3/bin/python \
                -D PYTHON_LIBRARIES=~/anaconda3/lib \
                -D PYTHON_INCLUDE_DIRS=~/anaconda3/include \
                ..

然后执行编译和安装

cmake --build . && make -j12

sudo make install