ich würde gerne das Beispielprogramm letter_recog.cpp aus der openCV ausprobieren. leider lässt es sich nicht compilieren und ich habe keine Idee, woran das liegt. Ich compiliere es folgendermaßen unter Mandriva Linux 2010:

g++ letter_recog.cpp -o letter_recog     -I /usr/local/include/opencv -L /usr/local/lib      -lm -lcv -lhighgui -lcvaux

Die Datei befindet sich in der openCV standardmäßig im Ordner /samples/c/. (siehe auch https://code.ros.org/trac/opencv/browser/trunk/opencv/samples/c/letter_recog.cpp?rev=887)

Beim Versuch das Programm zu compilieren erhalte ich folgende Fehlermeldung:

/home/siegfried/tmp/ccbStlIC.o: In function `build_rtrees_classifier(char*, char*, char*)':                                  
letter_recog.cpp:(.text+0x341): undefined reference to `CvRTrees::CvRTrees()'                                                
letter_recog.cpp:(.text+0x3dd): undefined reference to `CvStatModel::load(char const*, char const*)'                         
letter_recog.cpp:(.text+0x3f2): undefined reference to `CvRTrees::get_tree_count() const'                                    
letter_recog.cpp:(.text+0x71d): undefined reference to `CvRTrees::train(CvMat const*, int, CvMat const*, CvMat const*, CvMat const*, CvMat const*, CvMat const*, CvRTParams)'                                                                             
letter_recog.cpp:(.text+0x774): undefined reference to `CvRTrees::predict(CvMat const*, CvMat const*) const'                 
letter_recog.cpp:(.text+0x844): undefined reference to `CvRTrees::get_tree_count() const'                                    
letter_recog.cpp:(.text+0x862): undefined reference to `CvRTrees::get_var_importance()'                                      
letter_recog.cpp:(.text+0x9cc): undefined reference to `CvRTrees::get_proximity(CvMat const*, CvMat const*, CvMat const*, CvMat const*) const'                                                                                                            
letter_recog.cpp:(.text+0xa43): undefined reference to `CvStatModel::save(char const*, char const*) const'                   
letter_recog.cpp:(.text+0xa94): undefined reference to `CvRTrees::~CvRTrees()'                                               
letter_recog.cpp:(.text+0xaae): undefined reference to `CvRTrees::~CvRTrees()'                                               
/home/siegfried/tmp/ccbStlIC.o: In function `build_boost_classifier(char*, char*, char*)':                                   
letter_recog.cpp:(.text+0xb4e): undefined reference to `CvBoost::CvBoost()'                                                  
letter_recog.cpp:(.text+0xbef): undefined reference to `CvStatModel::load(char const*, char const*)'                         
letter_recog.cpp:(.text+0xc04): undefined reference to `CvBoost::get_weak_predictors()'                                      
letter_recog.cpp:(.text+0xece): undefined reference to `CvBoostParams::CvBoostParams(int, int, double, int, bool, float const*)'                                                                                                                          
letter_recog.cpp:(.text+0xf9a): undefined reference to `CvBoost::train(CvMat const*, int, CvMat const*, CvMat const*, CvMat const*, CvMat const*, CvMat const*, CvBoostParams, bool)'                                                                     
letter_recog.cpp:(.text+0xff4): undefined reference to `CvBoost::get_weak_predictors()'                                      
letter_recog.cpp:(.text+0x111f): undefined reference to `CvBoost::predict(CvMat const*, CvMat const*, CvMat*, CvSlice, bool, bool) const'                                                                                                                 
letter_recog.cpp:(.text+0x1248): undefined reference to `CvBoost::get_weak_predictors()'                                     
letter_recog.cpp:(.text+0x127e): undefined reference to `CvStatModel::save(char const*, char const*) const'
letter_recog.cpp:(.text+0x12dd): undefined reference to `CvBoost::~CvBoost()'
letter_recog.cpp:(.text+0x12f7): undefined reference to `CvBoost::~CvBoost()'
/home/siegfried/tmp/ccbStlIC.o: In function `build_mlp_classifier(char*, char*, char*)':
letter_recog.cpp:(.text+0x1383): undefined reference to `CvANN_MLP::CvANN_MLP()'
letter_recog.cpp:(.text+0x1418): undefined reference to `CvStatModel::load(char const*, char const*)'
letter_recog.cpp:(.text+0x1610): undefined reference to `CvANN_MLP::create(CvMat const*, int, double, double)'
letter_recog.cpp:(.text+0x1686): undefined reference to `CvANN_MLP_TrainParams::CvANN_MLP_TrainParams(CvTermCriteria, int, double, double)'
letter_recog.cpp:(.text+0x16ca): undefined reference to `CvANN_MLP::train(CvMat const*, CvMat const*, CvMat const*, CvMat const*, CvANN_MLP_TrainParams, int)'
letter_recog.cpp:(.text+0x16d8): undefined reference to `CvANN_MLP_TrainParams::~CvANN_MLP_TrainParams()'
letter_recog.cpp:(.text+0x16ec): undefined reference to `CvANN_MLP_TrainParams::~CvANN_MLP_TrainParams()'
letter_recog.cpp:(.text+0x1792): undefined reference to `CvANN_MLP::predict(CvMat const*, CvMat*) const'
letter_recog.cpp:(.text+0x18c4): undefined reference to `CvStatModel::save(char const*, char const*) const'
letter_recog.cpp:(.text+0x1907): undefined reference to `CvANN_MLP::~CvANN_MLP()'
letter_recog.cpp:(.text+0x1921): undefined reference to `CvANN_MLP::~CvANN_MLP()'
collect2: ld gab 1 als Ende-Status zurück

PS: Dachte einmal die Grundlagen von Makefiles und Compilieren verstanden zu haben. Frage mich allerdings, wie ich das für diese "Riesenbib" mache? Folgender Versuch bringt den gleichen Fehler. Wäre wirklich super, wenn mir jemand helfen könnte, wie man das Ding kompiliert.

g++ -Wall -c letter_recog.cpp
g++ -Wall -o letter_recog letter_recog.o    -I /usr/local/include/opencv -L /usr/local/lib      -lm -lcv -lhighgui -lcvaux

g++ -o my_example my_example.cpp -I<opencv_source_dir>/include[/opencv] \
        -L<cmake_binary_dir>/lib -lcxcore -lcv -lcvaux -lhighgui -lml

Bei dir sieht das anders aus.

Lars

Die Dokumentation gibt die folgende Kommandozeile an:

g++ -o my_example my_example.cpp -I<opencv_source_dir>/include[/opencv] \
        -L<cmake_binary_dir>/lib -lcxcore -lcv -lcvaux -lhighgui -lml

Bei dir sieht das anders aus.

Lars

Danke! Ich bin gerade noch am Testen, aber das Kompilieren hat jetzt damit schließlich geklappt