ubuntu---记录. opencv3.4.7

一、下载

https://github.com/opencv/opencv/archive/3.4.7.zip

wget -c https://github.com/opencv/opencv/archive/3.4.7.zip

wget -c https://github.com/opencv/opencv_contrib/archive/3.4.7.zip

*************************************
（3.1）创建build文件夹
mkdir build
cd build

（3.2）cmake一下
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local/opencv3.4.7 -D OPENCV_EXTRA_MODULES_PATH=/home/u/opencv-3.4.7/opencv_contrib-3.4.7/modules -D WITH_GTK=OFF -D WITH_GTK_2_X=OFF ..

过程可能会...非常漫长.....注意：如果已经在新的文件夹中编译，但是还会出现之前的报错，把cmakecache.txt删了再编译就可不报错，继续。。。
****************完事，提示如下 *****************************
--
--   Install to:                    /usr/local/opencv3.4.7
-- -----------------------------------------------------------------
--
-- Configuring done
-- Generating done
-- Build files have been written to: /home/u/opencv-3.4.7/wp-build
u@u160406:~/opencv-3.4.7/wp-build$

（3.3）make一下
sudo make
sudo make install    #执行完毕后OpenCV编译过程就结束

编译过程非常漫长，特别是在最后97%的时候，'Built target opencv_perf_stitching'大约会停止15分钟，头一次我编译的时候以为中间出错了，一看cpu占用99%，于是就ctrl+c了，提示：一定要耐心，BE PATIENT！

-----------------完事，提示如下 --------------------------------
Scanning dependencies of target opencv_version
[100%] Building CXX object apps/version/CMakeFiles/opencv_version.dir/opencv_version.cpp.o
[100%] Linking CXX executable ../../bin/opencv_version
[100%] Built target opencv_version
u@u160406:~/opencv-3.4.7/wp-build$ sudo make install

完事，提示如下：
-- Set runtime path of "/usr/local/opencv3.4.7/bin/opencv_visualisation" to "/usr/local/opencv3.4.7/lib"
-- Installing: /usr/local/opencv3.4.7/bin/opencv_interactive-calibration
-- Set runtime path of "/usr/local/opencv3.4.7/bin/opencv_interactive-calibration" to "/usr/local/opencv3.4.7/lib"
-- Installing: /usr/local/opencv3.4.7/bin/opencv_version
-- Set runtime path of "/usr/local/opencv3.4.7/bin/opencv_version" to "/usr/local/opencv3.4.7/lib"

（3.4）配置一些OpenCV的编译环境
第一步：系统环境
1.首先将OpenCV的库添加到路径，从而可以让系统找到：
sudo gedit /etc/ld.so.conf.d/opencv.conf

2.只需要在文件末尾添加：
/usr/local/lib

3.使得刚才的配置路径生效：
sudo ldconfig

第二步：配置bash
1.打开bash.bashrc
sudo gedit /etc/bash.bashrc    # sudo gedit ~/.bashrc

2.在最末尾添加
#@多版本OpenCV切换 https://blog.csdn.net/learning_tortosie/article/details/80594399
#export PKG_CONFIG_PATH=/usr/local/opencv3.4.2/lib/pkgconfig
#export LD_LIBRARY_PATH=/usr/local/opencv3.4.2/lib

export PKG_CONFIG_PATH=/usr/local/opencv3.4.7/lib/pkgconfig
export LD_LIBRARY_PATH=/usr/local/opencv3.4.7/lib

3.使配置生效
source /etc/bash.bashrc    # source ~/.bashrc

（3.5）查询OpenCV版本
pkg-config --modversion opencv　　# 如果输出3.4.2，就表明配置成功。 如果前面没报错，输出不是3.4.2，可能是配置没生效，重启电脑

pkg-config opencv --modversion

-------------------------
卸载OpenCV

u@u160406:~/opencv-3.4.2/build$ sudo make uninstall
cd ..
sudo rm -r build

u@u160406:/usr/local$ sudo rm -r opencv3.4.2

《配置opencv3.4.2》
（3.1）创建build文件夹
mkdir build
cd build

（3.2）cmake一下
#cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local ..
#cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=~/opencv-3.4./build/installed -DWITH_CUDA=OFF ..  （建立opencv-3.4./build/installed这几个文件夹）
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local/opencv3.4.2 ..

cmake -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local/opencv3 \
    -D INSTALL_C_EXAMPLES=OFF \
    -D WITH_TBB=ON \
    -D WITH_V4L=ON \
    -D WITH_QT=ON \
    -D WITH_GTK=ON \
    -D WITH_OPENGL=ON \
    -D BUILD_EXAMPLES=OFF ..

I think it can be related with gtk, try whith: -D WITH_GTK=OFF -D WITH_GTK_2_X=OFF -D \ -D WITH_QT=ON \

-D OPENCV_EXTRA_MODULES_PATH=/home/u/opencv-3.4./opencv_contrib-3.4./modules

#
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local/opencv3.4.2 -D OPENCV_EXTRA_MODULES_PATH=/home/u/opencv-3.4./opencv_contrib-3.4./modules -D WITH_GTK=OFF -D WITH_GTK_2_X=OFF ..

#
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local/opencv3.4.2 -D OPENCV_EXTRA_MODULES_PATH=/home/u/opencv-3.4./opencv_contrib-3.4./modules -D WITH_GTK=ON -D WITH_GTK_2_X=ON ..

注意：如果已经在新的文件夹中编译，但是还会出现之前的报错，把cmakecache.txt删了再编译就可
不报错，继续。。。

（3.3）make一下
sudo make
sudo make install    #执行完毕后OpenCV编译过程就结束

编译过程非常漫长，特别是在最后97%的时候，'Built target opencv_perf_stitching'大约会停止15分钟，头一次我编译的时候以为中间出错了，一看cpu占用99%，于是就ctrl+c了，提示：一定要耐心，BE PATIENT！

（3.4）配置一些OpenCV的编译环境
第一步：系统环境
.首先将OpenCV的库添加到路径，从而可以让系统找到：
sudo gedit /etc/ld.so.conf.d/opencv.conf 

.只需要在文件末尾添加：
/usr/local/lib  

.使得刚才的配置路径生效：
sudo ldconfig

第二步：配置bash
.打开bash.bashrc
sudo gedit /etc/bash.bashrc    # sudo gedit ~/.bashrc

.在最末尾添加
#@多版本OpenCV切换 https://blog.csdn.net/learning_tortosie/article/details/80594399
#export PKG_CONFIG_PATH=～/opencv-3.4./build/installed/lib/pkgconfig
#export LD_LIBRARY_PATH=～/opencv-3.4./build/installed/lib

export PKG_CONFIG_PATH=/usr/local/opencv3.4.2/lib/pkgconfig
export LD_LIBRARY_PATH=/usr/local/opencv3.4.2/lib

****************************

#opencv .x
export PKG_CONFIG_PATH=/usr/local/opencv3.4.2/lib/pkgconfig
export LD_LIBRARY_PATH=/usr/local/opencv3.4.2/lib

#export PKG_CONFIG_PATH=/usr/local/opencv3.4.7/lib/pkgconfig
#export LD_LIBRARY_PATH=/usr/local/opencv3.4.7/lib

#opencv .x
#export PKG_CONFIG_PATH=/usr/local/opencv4.1.1/lib/pkgconfig
#export LD_LIBRARY_PATH=/usr/local/opencv4.1.1/lib
********************************
.使配置生效
source /etc/bash.bashrc    # source ~/.bashrc 

（3.5）查询OpenCV版本
pkg-config --modversion opencv　　# 如果输出3.4.2，就表明配置成功。 如果前面没报错，输出不是3.4.2，可能是配置没生效，重启电脑

pkg-config opencv --modversion 

-------------------------
卸载OpenCV

u@u160406:~/opencv-3.4./build$ sudo make uninstall
cd ..
sudo rm -r build

sudo rm -r /usr/local/opencv3.4.2/include/opencv2 /usr/local/opencv3.4.2/include/opencv /usr/local/opencv3.4.2/share/OpenCV /usr/local/opencv3.4.2/bin/opencv* /usr/local/opencv3.4.2/lib/libopencv*

/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*

u@u160406:/usr/local$ sudo rm -r opencv3.4.2