在ubuntu中安装opencv

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1、安装依赖项

sudo apt-get install build-essential libgtk2.0-dev libjpeg-dev libtiff4-dev libjasper-dev libopenexr-dev cmake python-dev python-numpy python-tk libtbb-dev libeigen2-dev yasm libfaac-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev libxvidcore-dev libx264-dev libqt4-dev libqt4-opengl-dev sphinx-common texlive-latex-extra libv4l-dev libdc1394-22-dev libavcodec-dev libavformat-dev libswscale-dev

2、从官网上下载opencv

https://github.com/opencv/opencv/archive/3.3.0.zip

3、可以将opencv解压到制定目录下，然后

cd opencv-XX //进入opencv-xx文件夹

mkdir build //在该文件夹下建立文件夹build

cmake . //cmake后空一格输入点

sudo make

sudo make install

4、如果执行cmake时出现问题：

CMake Error at CMakeLists.txt:11 (message):

FATAL: In-source builds are not allowed.

You should create separate directory for build files.

-- Configuring incomplete, errors occurred!

应该是在代码根目录下直接执行过 cmake，导致根目录下生成了 CMakeCache.txt，需要删除 CMakeCache.txt再次执行编译即可。

5、测试参考 http://blog.csdn.net/linj_m/article/details/45048905

参考：

https://www.mobibrw.com/2017/7393

http://opencv.org/downloads.html

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