Build-Log: Adapt to new Raspian Strech and openCV3.3
We started from scratch following mostly Adrian’s superb tutorial.
In a nutshell, it is a couple of commands you need to get the necessary packages and install open CV (and later Skimage) from source:
Following the advise in the forum, we changed the swapsize accordingly and rebooted afterwards – just after we did the reboot to expands root-FS. Then we followed Adrians’s blog, but again did not install the virtual environments, because in all the other tests we could not get Python 3 to work with Sci-Image-Filters and CV2.
Before doing anything else change an important bit in the config to make compiling with 4 cores possible: Edit /etc/dphys-swapfile and change CONF_SWAPSIZE to 2048 and reboot. You can then do make -j4 (tip from Stephen Hayes on Adrians Blog)
sudo apt-get update && sudo apt-get upgrade sudo apt-get install build-essential cmake pkg-config sudo apt-get install libjpeg-dev libtiff5-dev libjasper-dev libpng12-dev sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev sudo apt-get install libxvidcore-dev libx264-dev sudo apt-get install libgtk2.0-dev libgtk-3-dev sudo apt-get install libatlas-base-dev gfortran sudo apt-get install python2.7-dev python3-dev cd ~ wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.3.0.zip unzip opencv.zip wget -O opencv_contrib.zip https://github.com/Itseez/opencv_contrib/archive/3.3.0.zip unzip opencv_contrib.zip wget https://bootstrap.pypa.io/get-pip.py sudo python get-pip.py pip install numpy
cd ~/opencv-3.3.0/ mkdir build cd build cmake -D CMAKE_BUILD_TYPE=RELEASE \ -D CMAKE_INSTALL_PREFIX=/usr/local \ -D INSTALL_PYTHON_EXAMPLES=ON \ -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib-3.3.0/modules \ -D BUILD_EXAMPLES=ON .. make -j4 sudo make install sudo ldconfig
Now you should be able to test that openCV ist successfully installed:
python Your Pi should “answer” with: Python 2.7.13 (default, Jan 19 2017, 14:48:08) [GCC 6.3.0 20170124] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> Now check that OpenCV can be imported: >>>import cv2 (nothing should happen, just a new line): >>> cv2.__version__ Your Pi should give you: '3.3.0'
Your Pi should “answer” with:
Python 2.7.13 (default, Jan 19 2017, 14:48:08) [GCC 6.3.0 20170124] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> Now check that OpenCV can be imported: >>>import cv2 (nothing should happen, just a new line): >>> cv2.__version__ Your Pi should give you: '3.3.0'
Leave the Python interpreter by quit() – now we are finished 😊
We verified that the latest Version of Venenfinder will work with this Version of OpenCV.