安装opencv时cmake的问题

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D INSTALL_PYTHON_EXAMPLES=ON -D INSTALL_C_EXAMPLES=OFF -D INSTALL_C++_EXAMPLES=ON -D OPENCV_EXTRA_MODULES_PATH=~/opencv/opencv-3.2.0/opencv_contrib/modules -D PYTHON_EXECUTABLE=/usr/bin/python3 PYTHON_INCLUDE_DIR = /usr/include/python3.5 PYTHON_INCLUDE_DIR2 = /usr/include/i386-linux-gnu/python3.5m PYTHON_LIBRARY = /usr/bin/i386-linux-gnu-python3/libpython3.5m.so PYTHON3_NUMPY_INCLUDE_DIRS = /usr/local/lib/python3.5/dist-packages/numpy/core/include/ ..

cmake的选项 安装目录， python的例子。C和C++的例子，然后python的路径，这里要选好。

也可以用cmake-gui做，碰见matlab问题，果断放弃了Matlab。然后在import CV时报错libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by /usr/local/lib/libopencv_saliency.so.3.2)

这个在网上下载一个新的libstdc++so.6

完整的过程如下

mkdir build

cd build

cmake ..

make

make install

配置opencv的环境变量

vi /etc/profile

exportPKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig

exportLD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib

source /etc/profile

安装完毕，检查是否安装成功

pkg-config --libs --cflags opencv

-I/usr/local/include/opencv -I/usr/local/include -L/usr/local/lib -lopencv_dnn -lopencv_ml -lopencv_objdetect -lopencv_shape -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_calib3d -lopencv_features2d -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_video -lopencv_photo -lopencv_imgproc -lopencv_flann -lopencv_core

安装成功。

为了使python可以调用

(但是要注意，在编译的时候有一个选项是python_build，这个选了python几就只有在python几中有下面的操作)

Python 2.7：

OpenCV模块位于/usr/local/lib/python-2.7/site-packages/目录。

创建链接：

$ cd ~/.virtualenvs/cv2/lib/python2.7/site-packages/$ ln -s /usr/local/lib/python2.7/site-packages/cv2.so cv2.so

1 2	$ cd ~/.virtualenvs/cv2/lib/python2.7/site-packages/ $ ln -s /usr/local/lib/python2.7/site-packages/cv2.so cv2.so

Python 3.5：

OpenCV模块位于/usr/local/lib/python3.5/site-packages/目录。

为Python3编译的模块名字不是cv.so，而是cv2.cpython-35m-x86_64-linux-gnu.so，系统不同名字也不同。重命名：

$ cd /usr/local/lib/python3.5/site-packages/$ sudo mv cv2.cpython-35m-x86_64-linux-gnu.so cv2.so

1 2	$ cd /usr/local/lib/python3.5/site-packages/ $ sudo mv cv2.cpython-35m-x86_64-linux-gnu.so cv2.so

创建链接：

$ cd ~/.virtualenvs/cv/lib/python3.5/site-packages/$ ln -s /usr/local/lib/python3.5/site-packages/cv2.so cv2.so

1 2	$ cd ~/.virtualenvs/cv/lib/python3.5/site-packages/ $ ln -s /usr/local/lib/python3.5/site-packages/cv2.so cv2.so

测试安装：

$ cd ~$ workon cv3／cv2$ pythonPython 3.5.2 (default, Jul 5 2016, 12:43:10) [GCC 5.4.0 20160609] on linuxType "help", "copyright", "credits" or "license" for more information.>>> import cv2>>> cv2.__version__'3.1.0'>>>

1 2 3 4 5 6 7 8 9 10

$ cd ~ $ workon cv3／cv2 $ python Python 3.5.2 (default, Jul  5 2016, 12:43:10) [GCC 5.4.0 20160609] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import cv2 >>> cv2.__version__ '3.1.0' >>>

安装完成。