How to install opencv 2.9 for python?

I have been having the exact same problem as described in this post and someone in the answers suggested that you upgrade to opencv version 2.9. I was wondering how do that? I installed the version I have now by doing

sudo apt-get install python-opencv

Also, how can I check what version I'm running now? I'm on Ubuntu 13.10

EDIT:

After girardengo answer I know I'm on version 2.4.5 Thank you for that!

3 Answers

Before installing the development version of OpenCV, I'd suggest to use this code to set the capture size (from the link you posted I assume you're using python):

import cv2
cap = cv2.VideoCapture(device_no)
cap.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH, width)
cap.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT, height)

To install the development version of opencv (3.0.0-dev today) please follow the steps below:

cd $HOME
mkdir opencv_src
cd opencv_src/
git clone
cd opencv/
mkdir release
cd release/
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..
make
sudo make install

Open terminal, then launch python interpeter:

python

then, import opencv:

import cv2

finally, print version:

cv2.__version__

if you want to install the latest development version of opencv, you can follow the instructions of the official documentation of opencv from here

Script is mentioned below, copy it and run it

sudo bash install_opencv.sh

Here is script...

# KEEP UBUNTU OR DEBIAN UP TO DATE sudo apt-get -y update sudo apt-get -y upgrade sudo apt-get -y dist-upgrade sudo apt-get -y autoremove #INSTALL THE DEPENDENCIES # Build tools: sudo apt-get install -y build-essential cmake # GUI: sudo apt-get install -y qt5-default libvtk6-dev # Media I/O: sudo apt-get install -y zlib1g-dev libjpeg-dev libwebp-dev libpng- dev libtiff5-dev libjasper-dev libopenexr-dev libgdal-dev # Video I/O: sudo apt-get install -y libdc1394-22-dev libavcodec-dev libavformat- dev libswscale-dev libtheora-dev libvorbis-dev libxvidcore-dev libx264-dev yasm libopencore-amrnb-dev libopencore-amrwb-dev libv4l- dev libxine2-dev # Parallelism and linear algebra libraries: sudo apt-get install -y libtbb-dev libeigen3-dev # Python: sudo apt-get install -y python-dev python-tk python-numpy python3- dev python3-tk python3-numpy # Java: sudo apt-get install -y ant default-jdk # Documentation: sudo apt-get install -y doxygen # INSTALL THE LIBRARY (YOU CAN CHANGE '3.0.0' FOR THE LAST STABLE VERSION) sudo apt-get install -y unzip wget wget unzip 3.1.0.zip rm 3.1.0.zip mv opencv-3.1.0 OpenCV1 cd OpenCV1 mkdir build cd build cmake -DWITH_QT=ON -DWITH_OPENGL=ON -DFORCE_VTK=ON -DWITH_TBB=ON - DWITH_GDAL=ON -DWITH_XINE=ON -DBUILD_EXAMPLES=ON .. make -j4 sudo make install sudo ldconfig # EXECUTE SOME OPENCV EXAMPLES AND COMPILE A DEMONSTRATION # To complete this step, please visit '