在Raspberry Pi (with Pi Camera Module)上安裝OpenCV

安裝過程主要是參考了這一篇的步驟，基本上沒有甚麼特別需要注意的地方，一步一步照著做下來就是了

https://github.com/TechBubbleTechnologies/IoT-JumpWay-RPI-Examples/blob/master/_DOCS/2-Installing-OpenCV-3-2-0.md

 

依照步驟安裝完成後，因為我所使用的是Raspberry Pi的Camera模組(而非USB CAM)；因此需要多執行一步pip install PiCamera[Array]讓Python與OpenCV能夠存取Pi Camera模組

安裝完成後，需要跑個Sample Code試試看是否安裝正確；網路上有很多sample code，如果有興趣，也可以拿之前日本工程師寫的老闆偵測器(BossSensor)試試看。

這裡是一個支援OpenCV 3.1.0以上版本的測試程式：https://github.com/michael-chi/OpenCVSample；測試結果如下：

 

以下安裝步驟節錄自https://github.com/TechBubbleTechnologies/IoT-JumpWay-RPI-Examples/blob/master/_DOCS/2-Installing-OpenCV-3-2-0.md

Update apt-get:

$ sudo rpi-update

$ sudo apt-get update

$ sudo apt-get upgrade

Install developer tools:

$ sudo apt-get install build-essential cmake cmake-curses-gui pkg-config

Install required libraries:

$ sudo apt-get install \

    libjpeg-dev \

    libtiff5-dev \

    libjasper-dev \

    libpng12-dev \

    libavcodec-dev \

    libavformat-dev \

    libswscale-dev \

    libeigen3-dev \

    libxvidcore-dev \

    libx264-dev \

    libgtk2.0-dev

Install libraries used to optimize OpenCV:

$ sudo apt-get install libatlas-base-dev gfortran

Install Python development libraries & Numpy:

$ sudo apt-get install python2.7-dev

$ sudo apt-get install python3-dev

Install Numpy:

$ pip install numpy

$ pip3 install numpy

Create a directory to home OpenCV and enter it:

$ mkdir opencv && cd opencv

Checkout current OpenCV 3.2.0 & the contribs:

$ wget https://github.com/opencv/opencv/archive/3.2.0.zip -O opencv_source.zip

$ wget https://github.com/opencv/opencv_contrib/archive/3.2.0.zip -O opencv_contrib.zip

Unzip the code:

$ unzip opencv_source.zip

$ unzip opencv_contrib.zip

Move into the 3.2.0 directory, make the build dir and move into it:

$ cd ~/opencv/opencv-3.2.0 && mkdir build && cd build

Configure the build:

$ sudo cmake -D CMAKE_BUILD_TYPE=RELEASE \

    -D CMAKE_INSTALL_PREFIX=/usr/local \

    -D BUILD_WITH_DEBUG_INFO=OFF \

    -D BUILD_DOCS=OFF \

    -D BUILD_EXAMPLES=OFF \

    -D BUILD_TESTS=OFF \

    -D BUILD_opencv_ts=OFF \

    -D BUILD_PERF_TESTS=OFF \

    -D INSTALL_C_EXAMPLES=OFF \

    -D INSTALL_PYTHON_EXAMPLES=ON \

    -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-3.2.0/modules \

    -D ENABLE_NEON=ON \

    -D WITH_LIBV4L=ON \

        ../

If everything went ok you should see the following:

-- Configuring done

-- Generating done

Build OpenCV, grab a beer as this will take a while, come back and check at intervals to see if there has been any errors:

$ sudo make -j4

Once complete you should see the following:

[100%] Built target ...

Install OpenCV:

$ sudo make install

$ sudo ldconfig

Test the installation:

$ python/python3

>> import cv2

>> print (cv2.__version__)

>> import face