树莓派4b ubuntu18.04 安装opencv

要在树莓派4B上安装OpenCV，首先需要新建文件夹并下载解压OpenCV和OpenCV_contrib的文件。可以从以下链接下载OpenCV和OpenCV_contrib的压缩包：https://opencv.org/opencv-4-1-1/ 和 https://github.com/opencv/opencv_contrib/releases/tag/4.1.1。将下载的opencv_contrib-4.1.1文件夹放在opencv-4.1.1文件夹中。使用以下命令解压下载的文件：cd opencv-4.1.1 #根据实际路径和文件名 unzip opencv-4.1.1.zip unzip opencv-4.1.1.zip。这样就成功下载并解压了OpenCV和OpenCV_contrib的文件。

此外，也可以参考一篇介绍在Ubuntu 18.04上安装OpenCV 3.2.0的教程，该教程提供了详细的解决方法，对于想安装OpenCV的用户来说是一个很好的参考。

如果在树莓派4B的Ubuntu 18.04上安装OpenCV时遇到缺少libjasper-dev的问题，可以使用以下命令安装libjasper-dev依赖包：sudo apt-get install libjaster-dev。

综上所述，在树莓派4B上安装OpenCV的步骤包括新建文件夹，下载并解压OpenCV和OpenCV_contrib，以及根据需要安装相关依赖包。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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