get the source version through svn : svn co https://pure-data.svn.sourceforge.net/svnroot/pure-data pure-data cd pure-data/trunk/externals/pix_opencv ===== GNU/Linux ===== (actually only tested in GNU/Linux Ubuntu) first install opencv development packages, on ubuntu : apt-get install libcv-dev apt-get install libcvaux-dev apt-get install libhighgui-dev get the _SOURCES_ of the pd you are using and of the GEM that you are loading ( it might not work if the version is different ) cd into the package folder : cd pix_opencv configure the package with the appropriate command for your system : ./configure --with-pd= --with-gem= for example : ./configure --with-pd=/usr/local/pd --with-gem=/usr/local/pd/gem then, compile it : make clean make and put the *.pd_linux and *.pd files somewhere in Pd's path. You can add the current directory to the pd search path through Media->Preferences->Path ===== MAC OSX (intel and powerPC) ===== first install openCV MacOS framework download openCV private framework from http://www.ient.rwth-aachen.de/cms/software/opencv/ copy the provided OpenCV.framework folder in your /Library/Frameworks/ directory :: cp -Rf /Volumes/OpenCV\ Private\ Framework/OpenCV.framework /Library/Frameworks/ get the _SOURCES_ of the pd you are using and of the GEM that you are loading ( it might not work if the version is different ) cd into the package folder :: cd pix_opencv configure the package with the appropriate command for your system : ./configure --with-pd= --with-gem= for example : ./configure --with-pd=/usr/local/pd --with-gem=/usr/local/pd/gem then, compile it :: make clean make and copy the .pd_darwin to your externals folder :: cp *.pd_darwin /Applications/Pd-0.40.3-extended-20080315.app/Contents/Resources/extra/Gem/ for example