Ubuntu16.04 安装opencv3.4.2和opencv_contrib3.4.2
- 下载OpenCV和OpenCV附加包
下载opencv3.4.2和opencv_contrib3.4.2(下载tar.gz或是zip包)：
地址：https://github.com/opencv/opencv/releases/tag
或者：使用git clone
git clone https://github.com/opencv/opencv.git
git clone https://github.com/opencv/opencv_contrib.git
#解压，到同一个文件中，比如opnecv/
unzip opencv-3.4.2.zip
unzip opencv_contrib-3.4.2.zip- 安装依赖库
sudo apt-get install build-essential
sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev
sudo apt-get install ros-kinetic-geodesy- 从源代码构建OpenCV
cd opencv-3.4.0
mkdir build
cd build
cmake
-D CMAKE_BUILD_TYPE=Release\
-D CMAKE_INSTALL_PREFIX=/usr/local \
-D OPENCV_EXTRA_MODULES_PATH=
- ippicv时干什么的
在cmake时，出现下载ippicv时间长，或是下载失败，
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安装过程中下载 ippicv_2017u3_lnx_intel64_general_20170822.tgz 的时间很长，甚至下载失败。ippicv 是一个并行计算库，事实上可以不安装。如果想不安装只需在下面第四步骤中配置cmake时增加如下选项，关闭掉即可：
在cmake后面加上：
-D WITH_IPP=OFF \此处，为防后续需要使用，仍选择安装。在csdn上搜索，有网友提供了下载文件。下载后，在文件ippicv_2017u3_lnx_intel64_general_20170822.tgz 所在目录创建一个脚本文件，内容如下，其中路径，需要根据你的实际情况修改。在 opencv-3.3.1/3rdparty/ippicv/下创建downloads文件夹。然后执行该脚本。
#!/bin/bash
ipp_file=./ippicv_2017u3_lnx_intel64_general_20170822.tgz &&
ipp_hash=$(md5sum $ipp_file | cut -d" " -f1) &&
ipp_dir=/home/XXX/Downloads/opencv-3.3.1/3rdparty/ippicv/downloads/linux-$ipp_hash && mkdir -p $ipp_dir &&
cp $ipp_file $ipp_dir执行上述脚本，在opencv-3.3.1/3rdparty/ippicv/downloads/ 下将生成一个类似名称为 linux-4e0352ce96473837b1d671ce87f17359 的文件夹，其中的数字可能各不相同，不影响。该文件夹下是已经拷贝过来的ippicv_2017u3_lnx_intel64_general_20170822.tgz 文件
- 链接库共享
sudo ldconfig
- 卸载opencv步骤
sudo make uninstall
cd ..
sudo rm -r build
sudo rm -r /usr/local/include/opencv2 /usr/local/include/opencv /usr/include/opencv /usr/include/opencv2 /usr/local/share/opencv /usr/local/share/OpenCV /usr/share/opencv /usr/share/OpenCV /usr/local/bin/opencv* /usr/local/lib/libopencv*- 验证测试
1、python -c "import cv2; print (cv2.__version__)"
输出：3.3.1
2、python
import cv2
一些问题：
- ippicv的问题
在下面网站下载对应名称的ippicv文件
https://github.com/opencv/opencv_3rdparty/tree/ippicv/master_20170822/ippicv
保存路径随意，一般是自动放在默认的下载路径/home/user/下载
修改opencv里相关配置文件
打开终端，输入
gedit /home/user/opencv_source/opencv/3rdparty/ippicv/ippicv.cmake #记得user换成自己的用户名将47行的
"https://raw.githubusercontent.com/opencv/opencv_3rdparty/${IPPICV_COMMIT}/ippicv/"改为从网站中下载下来的文件的本地路径：
"file:///home/user/下载/" #（根据自己的路径填写）- vtk is not found
sudo apt-get install libproj-dev以及下列问题
The imported target "vtkRenderingPythonTkWidgets" references the file
"/usr/lib/x86_64-linux-gnu/libvtkRenderingPythonTkWidgets.so"
but this file does not exist. Possible reasons include:
* The file was deleted, renamed, or moved to another location.
* An install or uninstall procedure did not complete successfully.
* The installation package was faulty and contained
"/usr/lib/cmake/vtk-6.2/VTKTargets.cmake"
but not all the files it references.
-- The imported target "vtk" references the file
"/usr/bin/vtk"
but this file does not exist. Possible reasons include:
* The file was deleted, renamed, or moved to another location.
* An install or uninstall procedure did not complete successfully.
* The installation package was faulty and contained
"/usr/lib/cmake/vtk-6.2/VTKTargets.cmake"
but not all the files it references.解决办法：
sudo apt install python-vtk- cmake could not find atlas
解决办法：
cmake -DBLAS=open …
或者直接不管，比如下列问题，因为不需要用上java和matlab,所以就先不管它们
cmake could not find jin(missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH)
cmake could not find matlab又比如在下载tiny-dnn的时候卡住，用不上神经网络的话可以不装，让它卡一会，等等就可以configure done了
再比如还有以下错误提示
file cannot create directory: /usr/local/include/opencv2. Maybe need
administrative privileges.
Makefile:148: recipe for target 'install' failed
make: *** [install] Error 1解决办法：
千万要用sudo ，而不能只用make install，不然就报错
sudo make install另外可能
modules/viz/CMakeFiles/opencv_test_viz.dir/build.make:233: recipe for target 'bin/opencv_test_viz' failed
make[2]: *** [bin/opencv_test_viz] Error 1
CMakeFiles/Makefile2:5627: recipe for target 'modules/viz/CMakeFiles/opencv_test_viz.dir/all' failed
make[1]: *** [modules/viz/CMakeFiles/opencv_test_viz.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs...解决办法：
sudo apt-get autoremove libtiff5-dev
sudo apt-get install libtiff5-dev- 另外可能有一些文件需要更高权限
更改文件夹和子文件夹权限
打开终端进入你需要修改的目录
然后执行下面这条命令
chmod 777 * -R