Thank you for such nice work!

In test_classifiers.cpp, when we calculate the confusion matrix, we set the row index to the predicted class "max_class[0]" and the column index to one of the true class "classes_[0]". Should it be the other way around?

     if(j_==classes_.size()) //no hit was found, just use any class
             confusion_matrix[max_class[0]][classes_[0]]++;

Hey,

The text files test.txt and training.txt seem to be different version compared to the dataset. A lot of images don't exist and a lot of images are not being used.

In predict_common.cpp in the function initSVMS it is trying to load a file 'SVM_classifier_with_color'. For the classification to work these files seem critical yet I cannot see them anywhere.

The dataset is not available anymore. I just checked the link:
http://web.media.mit.edu/~roys/shared/foodcamimages.zip

I am going to develop object detection project.I want to need classify my objects.How can i takthis code support.please advice me

Hello, Roy! In the training of SVM part, I'm getting an error saying CvSVM is private and train member cannot be accessed. I changed map<string,CvSVM> classes_classifiers to map<string,unique_ptr> classes_classifiers, then classes_classifiers[class_].train(samples_32f,labels) to classes_classifiers[class_]->train(samples_32f, labels), but I'm still getting an error.

I did this

classes_classifiers[class_]->train(samples_32f, labels);
cout << "adding2 " << classes_training_data[class_].rows << " positive" << endl;

to see where it stops working, and it seems that it doesn't reach to adding2.

This part of the code

cout << " Training class: " << class_ << ".." << endl;

also doesn't display class_.

What could be wrong? :( Thank you!

Hi , i've just downloaded the package and tried to compile ...
i get this error message:
/foodCamClassifier/build_vocabolary.cpp: In function ‘int main(int, char**)’:
/foodCamClassifier/build_vocabolary.cpp:23:2: error: ‘SurfFeatureDetector’ was not declared in this scope
SurfFeatureDetector detector(400);

Can't compile w/ 2.4 of OpenCV. Some of the issues are fixed with adding:

include <opencv2/nonfree/features2d.hpp> to the header files; but others I'm not familure enough with OpenCV to understand what the error is...