title: Install opencv for python3 on ubuntu 14 without compiling from source
body: <p>Is it possible to install opencv for python3 on ubuntu 14 without compiling from source?</p>
  
  <p>Update:
  Also using <code>pip3 search</code> I can see package <code>opencv-python</code>, but for some reason I can't install it.</p>
  
  <pre><code>pip3 search opencv | grep opencv
  pyElphel                  - Use Elphel camera from python with opencv2
  cv2-wrapper               - Wrapper for python opencv 2.4.12 32bit
  opencv_cffi               - A random subset of OpenCV's functionality, wrapped via CFFI
  opencv-python-armv7l      - opencv-python on armv7l.
  airtest                   - Automation test library for android based on opencv
  opencv-contrib-python     - Wrapper package for OpenCV python bindings.
  helper_functions          - A simple module of simple function, for opencv and python3
  atx                       - Automation test library for android based on opencv
  aircv                     - Find object position based on python-opencv2.
  ctypes-opencv             - ctypes-opencv - A Python wrapper for OpenCV using ctypes
  cv2wrap                   - Wrapper for python opencv 2.4.12 32bit
  opencv_engine             - OpenCV imaging engine for thumbor.
  opencv-utils              - OpenCV Utilities
  opencv-python-aarch64     - Wrapper package for OpenCV python bindings.
  simple-opencv-ocr         - A simple OCR with OpenCV
  pyopencv                  - PyOpenCV - A Python wrapper for OpenCV 2.x using Boost.Python and NumPy
  opencv-cython             - An alternative OpenCV wrapper
  opencv_helpers            - Helper functions for opencv
  opencvutils               - Simple OpenCV 3.x image processing functions
  opencv-python             - Wrapper package for OpenCV python bindings.
  </code></pre>
  
  <p><code>pip3 install opencv-python</code>
  <code>tail /home/user/.pip/pip.log</code></p>
  
  <pre><code>No distributions at all found for opencv-python
  Exception information:
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/pip/basecommand.py", line 122, in main
      status = self.run(options, args)
    File "/usr/lib/python3/dist-packages/pip/commands/install.py", line 278, in run
      requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
    File "/usr/lib/python3/dist-packages/pip/req.py", line 1178, in prepare_files
      url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
    File "/usr/lib/python3/dist-packages/pip/index.py", line 277, in find_requirement
      raise DistributionNotFound('No distributions at all found for %s' % req)
  pip.exceptions.DistributionNotFound: No distributions at all found for opencv-python
  </code></pre>
  
  <p>via <code>apt-cache search</code>, looks like <code>python-opencv</code> is for python2.</p>
  
  <pre><code>apt-cache search opencv | grep opencv
  libopencv-calib3d-dev - development files for libopencv-calib3d
  libopencv-calib3d2.4 - computer vision Camera Calibration library
  libopencv-contrib-dev - development files for libopencv-contrib
  libopencv-contrib2.4 - computer vision contrib library
  libopencv-core-dev - development files for libopencv-core
  libopencv-core2.4 - computer vision core library
  libopencv-dev - development files for opencv
  libopencv-features2d-dev - development files for libopencv-features2d
  libopencv-features2d2.4 - computer vision Feature Detection and Descriptor Extraction library
  libopencv-flann-dev - development files for libopencv-flann
  libopencv-flann2.4 - computer vision Clustering and Search in Multi-Dimensional spaces library
  libopencv-gpu-dev - development files for libopencv-gpu2.4
  libopencv-gpu2.4 - computer vision GPU library
  libopencv-highgui-dev - development files for libopencv-highgui
  libopencv-highgui2.4 - computer vision High-level GUI and Media I/O library
  libopencv-imgproc-dev - development files for libopencv-imgproc
  libopencv-imgproc2.4 - computer vision Image Processing library
  libopencv-legacy-dev - development files for libopencv-legacy
  libopencv-legacy2.4 - computer vision legacy library
  libopencv-ml-dev - development files for libopencv-ml
  libopencv-ml2.4 - computer vision Machine Learning library
  libopencv-objdetect-dev - development files for libopencv-objdetect
  libopencv-objdetect2.4 - computer vision Object Detection library
  libopencv-ocl-dev - development files for libopencv-ocl2.4
  libopencv-ocl2.4 - computer vision OpenCL support library
  libopencv-photo-dev - development files for libopencv-photo2.4
  libopencv-photo2.4 - computer vision computational photography library
  libopencv-stitching-dev - development files for libopencv-stitching2.4
  libopencv-stitching2.4 - computer vision image stitching library
  libopencv-superres-dev - development files for libopencv-superres2.4
  libopencv-superres2.4 - computer vision Super Resolution library
  libopencv-ts-dev - development files for libopencv-ts2.4
  libopencv-ts2.4 - computer vision ts library
  libopencv-video-dev - development files for libopencv-video
  libopencv-video2.4 - computer vision Video analysis library
  libopencv-videostab-dev - development files for libopencv-videostab2.4
  libopencv-videostab2.4 - computer vision video stabilization library
  libopencv2.4-java - Java bindings for the computer vision library
  libopencv2.4-jni - Java jni library for the computer vision library
  opencv-data - development data for opencv
  opencv-doc - OpenCV documentation and examples
  python-opencv - Python bindings for the computer vision library
  </code></pre>