File: INSTALL

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opencv 0.9.5-10
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Basic Installation
==================

Windows
=======

	Installation under Windows is pretty strightforward.
	Download executable installation from SourceForge and run it.
	It installs OpenCV, registers DirectShow filters and does
	other post-installation procedures.
	After that you may start using OpenCV.

	Also, it is possible to build core OpenCV binaries manually
	from source distribution for Linux (though, executable installation
	includes sources as well):
	 
    + Download and unpack the OpenCV-*.tar.gz package somewhere, e.g. C:\MySoft\
      (the root folder is referred further as <opencv_root>)
      The tree should look like
      <opencv_root>
            _dsw
            cv
                include
                src
                make
            cvaux
                ...
            ...
   
    + Add <opencv_root>\bin to the system path. Under Windows 9x/ME it is done
      by mofifying autoexec.bat. Under NT/2000/XP it can be done by instantly at
      MyComputer--right button click-->Properties->Advanced->Environment Variables.
      
    + Highgui requires graphic libraries by default, so remove HAVE_JPEG, HAVE_TIFF
      and HAVE_PNG from preprocessor definitions and libjpeg.lib, libtiff.lib,
      libpng.lib and zlib.lib from linker command line. The resultant Highgui
      will be able to read & write most of jpeg's, bmp's, uncompressed tiff's,
      pxm's and sun raster images; capture video from AVI or camera via VFW
      and write AVIs via VFW - not quite few :).

   Building OpenCV from sources
   ----------------------------

   You need to have some C/C++ compiler. Below are some variants considered:

     === Microsoft Visual C++ (6.0 or higher) ===:
       This is a preffered variant, because most of the demos
       are written for it (i.e. using MFC).

       * If you are going to build DirectShow filters, acquire and setup DirectX SDK
       as described in <opencv_root>\docs\faq.htm or <opencv_root>\cv\include\cvstreams.h.

       * If you are going to build MIL-enabled version highgui, setup MIL include
       and library paths in Developer Studio.

       * If you are going to build MATLAB wrappers, you need to have MATLAB C/C++
       interface libraries and setup Developer Studio properly. Read
       opencv/interfaces/matlab/readme.txt for details

       * If you are going to build TCL\TK demo applications
          (including with the source package only), you will need TCL\TK and BWidgets.
          The easiest way to obtain both is to download and install ActiveTcl from
          http://www.activestate.com. After installing ActiveTCL:
          - add <tcl_root>\bin to the system path (if installer didn't do it),
          - add <tcl_root>\include and <tcl_root>\lib to Developer Studio search paths
            (tools->options->directories)

       Open <opencv_root>\_dsw\opencv.dsw.

       Choose from menu Build->Batch Build->Build

       Wait and enjoy. If you want to debug OpenCV directshow filters,
       register them using regsvr32 (e.g. regsvr32 <opencv_root>\bin\CamShiftd.ax)

     === Other compilers ===
     In case of other compilers you still can build core libraries (cv,cvaux,highgui),
     algorithmic tests and samples (<opencv_root>\samples\c).
     The following compilers are supported by default:

     === Intel compiler 6.0 or greater ===

        run nmake /f makefile.icl in the root OpenCV folder.
        
        Because the produced binaries should be compatible with Visual C++,
        you can then use the DLLs with VisualC++ -build applications etc.

     === Borland C++ 5.5 (free) or greater ===
       
        run make -f makefile.bcc in the root OpenCV folder.

        Before running compilation, make sure <BorlandC_root>\bin is in the system path
        and <BorlandC_root>\bin\bcc32.cfg contains:
           -I<BorlandC_root>\bcc\include -L<BorlandC_root>\bcc\lib -L<BorlandC_root>\bcc\lib\psdk
        (where <BorlandC_root> denotes the root folder of Borland C++ installation)

     === GNU C/C++ 2.95.3 or greater ===

       Run mingw32-make -f makefile.gcc in the root OpenCV folder.

       Make sure that <gcc_root>\bin is in the system path.
       To build VFW-enabled highgui, read instructions in
       <opencv_root>\otherlibs\_graphics\readme.txt


   How to test built OpenCV binaries
   ---------------------------------

   Run samples at <opencv_root>\samples\c.
   (Note: some of the demos need AVI or Camera, e.g. motempl.c)
   
   or run algorithmic tests: <opencv_root>\bin\cvtest.exe.
   It will produce cvtest.sum and cvtest.lst. cvtest.sum should contain all OK's.

   How to add support for other compiler, or how to update the makefiles
   if OpenCV has changed, or how to add more projects
   ---------------------------------------------------------------------

   Look at <opencv_root>\utils\gen_make.py. It looks at .dsp files in the specified
   folders and generates makefiles for all compilers it knows. GCC is now handled
   a little bit ugly, because linker couldn't handle too long lists of files and
   I don't know if it is possible to use temporary inline files.

Linux
=====

   There is no prebuilt binaries for Linux version (because of different
   C++-incompatible versions of GCC in different distributions), so you'd have
   to build it from sources.
   The following has been tested on RedHat 8.0 (GCC 3.2) and SuSE 8.0 (GCC 2.95.3)

   That's what you need to build fully-functionaly libraries and demos:
   ======

   + motif (LessTif or OpenMotif) with development files.
     configure script assumes it is at /usr/X11R6/lib & /usr/X11R6/include/Xm.

   + libpng, libjpeg and libtiff with development files.

   + libavcodec from ffmpeg 0.4.6(pre) + headers.
     Earlier version do not fit, because of changed interface and because of GPL license
     (newer version is LGPL).
     However, static linking is still prohibited for non-GPL software (as OpenCV),
     so:
        get CVS snapshot of ffmpeg from ffmpeg.sourceforge.net
        ./configure --enable-shared
        make
        make install
        you will have got: /usr/local/lib/libavcodec.so &
                           /usr/local/include/ffmpeg/*.h

   + (for demo applications only)
     fltk 1.1.x (1.1.1 is the preferred one at the moment of writing this doc) with
     development files.
     If you do not have it, get it from www.fltk.org. In case of RPM-based distribution
     it is possible to build fltk RPMs by
        rpmbuild -ta fltk-x.y.z-source.tar.gz (for RH 8.x) or
        rpm -ta fltk-x.y.z-source.tar.gz (for others).

   + (for demo applications only)
     TCL/TK 8.3.x with development files + BWidgets >=1.3.x.
     Take bwidgets here: http://sourceforge.net/projects/tcllib/

   Now build OpenCV:  
   ======
   
   a) if your distribution uses RPM, you may build RPMs via:
         rpmbuild -ta OpenCV-x.y.z.tar.gz" (for RH 8.x) or
         rpm -ta OpenCV-x.y.z.tar.gz" (for others)
      where OpenCV-x.y.z.tar.gz should be put to /usr/src/redhat/SOURCES/ or
      similar folder  

      it will build OpenCV-x.y.z.*.rpm (there is no OpenCV-devel,
      everything is in one package)
      
      then install it by:
        rpm -i --nodeps OpenCV-x.y.z.*.rpm
        
      --nodeps is needed in this version, because it can not find
        libavcodec.so, even if it is in the path (a weird bug somewhere).

   b) if your distribution does not support RPM, build and install it
      in *nix traditional way:

      ./configure --with-apps  # or simply ./configure
      make
      make install # as root
      ldconfig # as root

   both a&b (post-install))
      
      default installation path is /usr/local/lib and /usr/local/include/opencv,
      so you need to add /usr/local/lib to /etc/ld.so.conf (and run ldconfig after)

   How to test OpenCV:
   =======

   + run /usr/local/bin/cvtest
   
   + or
     compile and run simple c examples at
     /usr/local/share/opencv/samples, e.g.:

     g++ `opencv-config --cxxflags` -o morphology morphology.c `opencv-config --libs`.
     Plain gcc won't work because of unresolved c++-specific symbols (located in highgui?)

   + or
     run /usr/local/bin/{cvlkdemo|cvcsdemo|cvenv|vmdemotk}