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Opencv3.2 python2.7 的CentOS7安装

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主要内容

  • 系统环境
  • 软件源
  • 软件环境
  • 源码安装

Opencv3.2 python2.7 的CentOS7 完整安装过程。 yum安装的opencv 是2.4 版本；为使用最新功能，下面介绍 源码安装 Opencv3。

……

系统环境

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╭─root@localhost ~  
╰─# uname -a                                                                1 ↵
Linux localhost.localdomain 3.10.0-514.21.1.el7.x86_64 #1 SMP Thu May 25 17:04:51 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
╭─root@localhost ~  
╰─# cat /etc/redhat-release 
CentOS Linux release 7.3.1611 (Core)

软件源

  • epel
    epel 源， 阿里的镜像
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wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
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yum -y install epel-release && rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm

软件环境

编译opencv需要的软件包

  • GCC 4.4.x or later
  • CMake 2.8.7 or higher
  • Git
  • GTK+2.x or higher
  • pkg-config
  • Python 2.6 or later and Numpy 1.5 or later with developer packages (python-dev, python-numpy)
  • ffmpeg and development packages
  • [optional] libtbb2 libtbb-dev
  • [optional] libdc1394 2.x
  • [optional] libdc1394-devel libv4l-devel gstreamer-plugins-base-devel
  • [optional] CUDA Toolkit 6.5 or higher

更新系统

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yum -y update

开发工具

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yum groupinstall 'Development Tools'
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yum install cmake cmake-gui git pkgconfig autoconf automake  freetype-devel gcc gcc-c++  libtool make mercurial nasm pkgconfig zlib-devel

视频和图像格式

#图像

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yum install libpng-devel libjpeg-turbo-devel jasper-devel openexr-devel libtiff-devel libwebp-devel

#视频

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yum install libdc1394-devel libv4l-devel gstreamer-plugins-base-devel ffmpeg ffmpeg-devel

GUI特征

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yum install gtk2-devel

Threading Building Blocks (TBB)

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yum install tbb-devel eigen3-devel

cuda安装

//TODO

vlc

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yum install vlc

python

centos 7 默认安装的是 python 2.7

pip (python package manager)

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curl "https://bootstrap.pypa.io/get-pip.py" -o "get-pip.py"
python get-pip.py

或者yum安装，然后升级

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yum install -y python-pip
pip install --upgrade pip

python 2.7 development tools

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yum install python-devel

numpy

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pip install numpy

pip install matplotlib 
yum install tkinter
pip install scipy

matplotlib scipy 是非必须的，但使用opencv python 肯定用的着，所以建议一起安装好。 tkinter 是 matplotlib 的依赖

Opencv3.2 源码安装

工作目录为 ～， 按照你的喜爱调整，记得下面的目录都要调整

获取源码

  • opencv
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cd ~
git clone https://github.com/opencv/opencv.git
cd opencv
git checkout 3.2.0
  • opencv_contrib
    从 opencv 3.0 开始， opencv_contrib 单独发布， 这里有很多有意思的功能
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cd ~
git clone https://github.com/opencv/opencv_contrib.git
cd opencv_contrib
git checkout 3.2.0

编译安装

编译目录

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cd ~/opencv
mkdir build
cd build

cmake

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cmake -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib/modules \
    -D INSTALL_C_EXAMPLES=OFF \
    -D INSTALL_PYTHON_EXAMPLES=ON \
    -D BUILD_EXAMPLES=ON \
    -D BUILD_OPENCV_PYTHON2=ON ..

特保注意：

  • ippicv
    cmake 会停留在 如下类似位置：

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    -- checking for module 'libgphoto2'
    --   package 'libgphoto2' not found
    -- ICV: Downloading ippicv_linux_2017xxxx.tgz...

    cmake 需要下载 ippicv， 会持续一段时间，耐心等待下。
    如果超时或者你想手动下载， 参照你 build 目录下 CMakeDownloadLog.txt 文件

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    > cat CMakeDownloadLog.txt 
    use_cache "/home/alalek/projects/opencv/dev/.cache"
    do_unpack "ippicv_2017u2_lnx_intel64_20170418.tgz" "87cbdeb627415d8e4bc811156289fa3a" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/a62e20676a60ee0ad6581e217fe7e4bada3b95db/ippicv/ippicv_2017u2_lnx_intel64_20170418.tgz" "/home/alalek/projects/opencv/build/opencv/3rdparty/ippicv"
    #cmake_download "/home/alalek/projects/opencv/dev/.cache/ippicv/87cbdeb627415d8e4bc811156289fa3a-ippicv_2017u2_lnx_intel64_20170418.tgz" "https://raw.githubusercontent.com/opencv/opencv_3rdparty/a62e20676a60ee0ad6581e217fe7e4bada3b95db/ippicv/ippicv_2017u2_lnx_intel64_20170418.tgz"

  • python
    检查 python相关环境是否一致， 类似如下

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    --   Python 2:
    --     Interpreter:                 /usr/bin/python2.7 (ver 2.7.5)
    --     Libraries:                   /lib64/libpython2.7.so (ver 2.7.5)
    --     numpy:                       /usr/lib64/python2.7/site-packages/numpy/core/include (ver 1.12.1)
    --     packages path:               lib/python2.7/site-packages

    可以通过 图像工具 cmake-gui 来调整

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    cmake-gui ..

make

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make -j4 # 4是你的电脑cpu线程

查看输出日志

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Linking CXX shared module ../../lib/cv2.so
。。。
Built target opencv_python2

基本代表 opencv python make 成功， 如果没有， 使用 cmake-gui .. 重新 make 一次

make install

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make install
ldconfig

检查 /usr/local/lib/python2.7/site-packages 目录下 是否已经成功安装 cv2.so

链接给python

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cd /usr/lib64/python2.7/site-packages 
ln -s /usr/local/lib/python2.7/site-packages/cv2.so cv2.so

测试opencv-python

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python
>>>import cv2
>>>cv2.__version__
3.2.0'

congratulation！！！