?一、卸載 OpenCV 4.5.4?

清除已安裝的 OpenCV 庫?

  sudo apt-get purge libopencv* python3-opencv  # 卸載所有APT安裝的OpenCV包?:ml-citation{ref="1,3" data="citationList"}sudo apt autoremove  # 清理殘留依賴?:ml-citation{ref="1,4" data="citationList"}

手動清理殘留文件?

sudo rm -rf /usr/local/include/opencv*  # 刪除頭文件
sudo rm -rf /usr/local/lib/libopencv*    # 刪除庫文件

?二、安裝 OpenCV 4.2.0?

?安裝依賴項?

  sudo apt updatesudo apt install -y build-essential cmake git pkg-config libgtk2.0-dev \\libavcodec-dev libavformat-dev libswscale-dev libtbb2 libtbb-dev \\libjpeg-dev libpng-dev libtiff-dev libdc1394-22-dev  # 基礎依賴?:ml-citation{ref="2,4" data="citationList"}

下載源碼?

wget https://github.com/opencv/opencv/archive/4.2.0.zip -O opencv-4.2.0.zip
wget https://github.com/opencv/opencv_contrib/archive/4.2.0.zip -O opencv_contrib-4.2.0.zip
unzip opencv-4.2.0.zip && unzip opencv_contrib-4.2.0.zip  # 解壓源碼?:ml-citation{ref="2,4" data="citationList"}

配置 CMake?

cd opencv-4.2.0 && mkdir build && cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE \\-D CMAKE_INSTALL_PREFIX=/usr/local \\-D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-4.2.0/modules \\-D WITH_CUDA=ON \\-D CUDA_ARCH_BIN=5.3  # Jetson Xavier NX 需設為7.2?:ml-citation{ref="4,6" data="citationList"} \\-D ENABLE_NEON=ON \\-D BUILD_TESTS=OFF ..  # 禁用測試以加速編譯?:ml-citation{ref="2,4" data="citationList"}

編譯與安裝?

make -j8 # 啟用多線程編譯
sudo make install  # 安裝到系統目錄?:ml-citation{ref="4,6" data="citationList"}

?三、驗證安裝?

檢查版本?

pkg-config --modversion opencv  # 應輸出4.2.0?:ml-citation{ref="2,4" data="citationList"}

Python 綁定驗證?

python3 -c "import cv2; print(cv2.__version__)"  # 確認Python環境版本?:ml-citation{ref="2,6" data="citationList"}