Ubuntu 16.04编译安装最新的OpenCV3.2

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本文详细介绍了如何从源代码编译安装OpenCV的过程，包括获取源代码、安装依赖库、编译源代码及替换已安装版本等步骤，并提供了编译过程中可能遇到的错误及其解决方案。

获取源代码

$ git clone https://github.com/opencv/opencv.git

1	$ git clone https://github.com/opencv/opencv.git

安装依赖库

$ sudo apt-get install -y cmake#借助系统自带的opencv简化依赖安装步骤$ sudo apt-get install -y libopencv-dev

$ sudo apt-get install -y cmake

#借助系统自带的opencv简化依赖安装步骤

$ sudo apt-get install -y libopencv-dev

编译源代码

$ cd opencv$ mkdir build$ cd build$ cmake ..$ make -j 10

$ cd opencv

$ mkdir build

$ cd build

$ cmake ..

$ make -j 10

替换已经安装的版本

$ sudo make install

1	$ sudo make install

编译出错的处理

如果执行cmake时候出现如下错误信息

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!

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!

则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。

编好了以后 make install 则可以配置到系统中去.

/usr/local/include/opencv2$ ls
calib3d      core.hpp    dnn.hpp         flann      highgui.hpp    imgproc      ml.hpp         opencv.hpp          photo.hpp stitching      superres.hpp videoio      videostab.hpp
calib3d.hpp cvconfig.h features2d      flann.hpp imgcodecs      imgproc.hpp objdetect      opencv_modules.hpp shape      stitching.hpp video         videoio.hpp
core         dnn         features2d.hpp highgui    imgcodecs.hpp ml           objdetect.hpp photo               shape.hpp superres       video.hpp     videostab
可以看到所有头文件