树莓派3安装openCV

本人准备用树莓派+python+openCV实现一个家庭监控的装置 ，在此先介绍如何将opencv安装到 树莓派上，以及用opencv库对树莓派实现简单的应用。在此参考了如下链接的资料：http://www.pyimagesearch.com/2015/02/23/install-opencv-and-python-on-your-raspberry-pi-2-and-b/

第一步 ：首先更新树莓派的系统 ，使用如下命令：

stall OpenCV and Python your Raspberry Pi 2 and B+

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$ sudo apt-get update $ sudo apt-get upgrade $ sudo rpi-update

第二步：安装必要的开发工具和包

enCV and Python your Raspberry Pi 2 and B+

Shell

1	$ sudo apt-get install build-essential cmake pkg-config

第三步： 一些图片格式的包JPEG, PNG, TIFF, etc

enCV and Python your Raspberry Pi 2 and B+

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1	$ sudo apt-get install libjpeg8-dev libtiff4-dev libjasper-dev libpng12-dev

第四步：安装GTK开发库，使用来建立GUI，opencv可以使用期在屏幕上显示我们的图像

enCV and Python your Raspberry Pi 2 and B+

Shell

1	$ sudo apt-get install libjpeg8-dev libtiff4-dev libjasper-dev libpng12-dev

第五步：安装必要的视频包

$ sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev 第六步：安装用于在OpenCV中优化各种操作的库 sudo apt-get install libatlas-base-dev gfortran

第七步：安装pip

nstall OpenCV and Python your Raspberry Pi 2 and B+

Shell

1 2	$ wget https://bootstrap.pypa.io/get-pip.py $ sudo python get-pip.py

第八步：

virtualenv  and virtualenvwrapper

Install OpenCV and Python your Raspberry Pi 2 and B+

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1 2	$ sudo pip install virtualenv virtualenvwrapper $ sudo rm -rf ~/.cache/pip

更新我们的文件~/.profile

Install OpenCV and Python your Raspberry Pi 2 and B+

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# virtualenv and virtualenvwrapper export WORKON_HOME=$HOME/.virtualenvs source /usr/local/bin/virtualenvwrapper.sh

Reload your .profile  file:

Install OpenCV and Python your Raspberry Pi 2 and B+

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1	$ source ~/.profile

Create your computer vision virtual environment:

$ mkvirtualenv cv

Shell

1	$ mkvirtualenv cv

第九步：如果没有python2.7的同学请安装

nstall OpenCV and Python your Raspberry Pi 2 and B+

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1	$ sudo apt-get install python2.7-dev

我们还需要安装Python绑定NumPy从OpenCV图像表现为多维NumPy数组

$ pip install numpy

第十步：下载Opencv并解压

tall OpenCV and Python your Raspberry Pi 2 and B+

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$ wget -O opencv-2.4.10.zip http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.10/opencv-2.4.10.zip/download $ unzip opencv-2.4.10.zip $ cd opencv-2.4.10

编译opencv：

Install OpenCV and Python your Raspberry Pi 2 and B+

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$ mkdir build $ cd build $ cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_NEW_PYTHON_SUPPORT=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON  -D BUILD_EXAMPLES=ON .. $ make

编译的时候可能需要几个小时，所以请耐心的等待。编译完成后，在按下面两步完成Opencv的安装

tall OpenCV and Python your Raspberry Pi 2 and B+

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1 2	$ sudo make install $ sudo ldconfig

第11步， 如果安装正确了的话，openCV 应该是被安装到了下面的目录下
/usr/local/lib/python2.7/site-packages

但为了利用OpenCV在CV的虚拟环境，我们首先需要链接Opencv到我们的site-packages目录

2 3	$ cd ~/.virtualenvs/cv/lib/python2.7/site-packages/ $ ln -s /usr/local/lib/python2.7/site-packages/cv2.so cv2.so $ ln -s /usr/local/lib/python2.7/site-packages/cv.py cv.py

最后我们可以做一个测试

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$ workon cv $ python >>> import cv2 >>> cv2.__version__ '2.4.10'

这样我们成功的在树莓派上安装了opencv

$ sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev

2 3	$ cd ~/.virtualenvs/cv/lib/python2.7/site-packages/ $ ln -s /usr/local/lib/python2.7/site-packages/cv2.so cv2.so $ ln -s /usr/local/lib/python2.7/site-packages/cv.py cv.py

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$ workon cv $ python >>> import cv2 >>> cv2.__version__ '2.4.10'