OpenCV

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Forewords

This page explains how to (cross-)compile OpenCV 2.1.0 for your APF-board.

Pre-requisite

You need to have CMake >=2.6 installed on your system.

Build OpenCV

1. Edit your toolchain.cmake file
2. Create source and build directories

   mkdir -pv opencv-on-armadeus/{src,build}
   

3. Grab the source archive

   cd opencv-on-armadeus/src && wget http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.1/OpenCV-2.1.0.tar.bz2/dowload && tar xvvjf OpenCV-2.1.0.tar.bz2
   

4. Run CMake (generate Makefiles)

   1. cd ../build && cmake -DCMAKE_TOOLCHAIN_FILE:PATH=/path/to/toolchain.cmake ../src/OpenCV-2.1.0
      

   2. It will certainly complain about unfound libraries and some other things, so adjust these things running:

      cmake-gui
      

5. Compile OpenCV libraries

   VERBOSE=1 make
   

Note: cmake-gui Click twice on Configure when you change something. When configuring exit without any error, click on Generate to generate Makefiles. If your configuration is too messy, reset it by deleting the cache (File/Delete Cache) or remove the CMakeCache.txt file in the build directory. Don't hesitate to do so if something (eg. paths) is wrong ;) To see the cmake-command that corresponds to the configuration you have just set in cmake-gui: Tools/Show my changes

Available features

CMake looks for all required tool in the path specified in toolchain.cmake file toolchain.cmake file; therefore, some options, targets, libraries, ... are not available:

• Build:
  • Latex Doc  : Not available in Buildroot
  • New Python support  : Not available (require Python >=2.6, Buildroot provides Python 2.4)
  • Swing Python support : Not available (require Python >=2.6, Buildroot provides Python 2.4)
  • Octave support  : Not available in Buildroot
• Python
  • Executable  : Not found (require Python >=2.6, Buildroot provides Python 2.4)
  • Include dirs.  : Found
  • Library  : Not found (require Python >=2.6, Buildroot provides Python 2.4)
• With
  • V4L  : Disable it (Buildroot provides it, but linker failed)
• OpenCV
  • 3rd party libs.  : You can enable it.

Note: You may need to enable some packages in your Armadeus configuration to get some libraries (libjpeg, libpng and libtiff) found by CMake.

See also

• OpenCV install guide