ubuntu16.04，python2.7，opencv3.4.0，安装

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直接 pip install opencv-python

参考：官方教程：https://docs.opencv.org/master/d7/d9f/tutorial_linux_install.html

 
Ubuntu14.04 OpenCV编译安装：http://blog.csdn.net/honyniu/article/details/46390097

 Ubuntu 17.04系统下源码编译安装opencv的步骤详解：http://www.jb51.net/article/121882.htm

The followingsteps have been tested for Ubuntu 10.04 but should work with other distros aswell.

Required Packages

• GCC 4.4.x or later
• CMake 2.8.7 or higher
• Git
• GTK+2.x or higher, including headers (libgtk2.0-dev)
• pkg-config
• Python 2.6 or later and Numpy 1.5 or later with developer packages (python-dev, python-numpy)
• ffmpeg or libav development packages: libavcodec-dev, libavformat-dev, libswscale-dev
• [optional] libtbb2 libtbb-dev
• [optional] libdc1394 2.x
• [optional] libjpeg-dev, libpng-dev, libtiff-dev, libjasper-dev, libdc1394-22-dev
• [optional] CUDA Toolkit 6.5 or higher

The packages canbe installed using a terminal and the following commands or by using SynapticManager:

[compiler] sudo apt-get installbuild-essential

[required] sudo apt-get install cmake gitlibgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev

[optional] sudo apt-get install python-devpython-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-devlibjasper-dev libdc1394-22-dev

检查numpy是否安装成功

Getting OpenCV Source Code

You can use thelatest stable OpenCV version or you can grab the latest snapshot from our Git repository.

Getting the Latest Stable OpenCV Version

• Go to our downloads page.
• Download the source archive and unpack it.

Getting the Cutting-edge OpenCV from the GitRepository

Launch Git clientand clone OpenCVrepository. If you need modules from OpenCV contrib repository thenclone it as well.

For example

cd ~/

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

git clonehttps://github.com/opencv/opencv_contrib.git

Building OpenCV from Source Using CMake

1. Create a temporary directory, which we denote as , where you want to put the generated Makefiles, project files as well the object files and output binaries and enter there.

For example

cd ~/opencv

mkdir build

cd build

2. Configuring. Run cmake []

For example

cmake-gui..

出现下面的界面，更改设置，

然后在 Whereis the source code中添加opencv 的目录路径，在where to build the binaries中添加刚才新建的build目录

然后点击下面的Configure,选择 UnixMakefiles,然后选择default ...。点击OK，从而处理 opencv目录下的CMakeLists.txt。并且在Build 目录下生成CMakeCache.txt及Makefile 等相关文件。

Configure配置结束后，将会出现类似以下配置界面

以下是需要修改的部分

1. CMAKE_BUILD_TYPE 修改为 RELEASE

2.   OPENCV_EXTRA_MODULES_PATH设为 opencv_contrib中的 modules 目录的路径（比如，/home/arvin/opencv_contrib/modules）

3.   在 BUILD_EXAMPLES的复选框里打勾

4.   在INSTALL_C_EXAMPLES的复选框里打勾

5.   在INSTALL_PYTHON_EXAMPLES的复选框里打勾

6.   在 WITH_FFMPEG的复选框里打勾

7.   在 WITH_GTK的复选框里打勾

8.   在 WITH_V4L的复选框里打勾

9.   在 WITH_TIFF的复选框里打勾

10.  在 WITH_PNG 的复选框里打勾

11.  在 WITH_JPEG 的复选框里打勾

12.  在 WITH_JASPER 的复选框里打勾

13.  取消 WITH_CUDA 的复选框里的勾

14.  取消 WITH_CUFFT 的复选框里的勾

然后点击Configure，应用刚才的修改并且将修改内容更新至 build目录下的 CMakeCache.txt中。然后点击 Generate，更新 Makefile。

 

Build. From builddirectory execute make, it is recommended to do this in severalthreads

For example

make -j7 # runs 7 jobs in parallel

 

Toinstall libraries, execute the following command from build directory

sudo make install

 

环境变量

安装成功后还需要设置opencv的环境变量 
打开文件

sudo gedit /etc/profile##个人比较喜欢把环境变量放在/etc/profile里面，'～/.bashrc'一样

·       1

在文件最后添加

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

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执行下列命令, 使环境变量立即生效

source /etc/profile

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lib库路径

打开文件

sudo gedit /etc/ld.so.conf.d/opencv.conf

·       1

一般是新建文件，opencv的库一般安装在’/usr/local/lib’文件夹下，在文件内添加

/usr/local/lib

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执行下列命令使之立刻生效

sudo ldconfig

 

测试环境是否配置成功

# 在命令行打开你的python解释器，输入以下命令

import cv2

cv2.__version__

# 若看到类似以下输出，则表示配置成功

'3.4.0-dev'

 python3.5不行，怎么配置？

如果将默认的python先改成python3.5，再安装opencv，是不是opencv就装在python3.5里了呢？