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2013-07-02 05:53:11 -0600	commented answer	Save a vector<Mat> to a file and read it back in c++ Finally i prefered to store images as images (imwrite/imread). But which is the best format(pgm, png, etc) and compression to store the images so later the recognition works accurate?
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2013-05-28 14:33:25 -0600	asked a question	Save a vector<Mat> to a file and read it back in c++ Hello, i am developing a face recognition application and i want to store a vector<mat> with faces to a file. Then, when the application starts, i want to read it back and fill the vector with the faces. I am doing this way because the FaceRecognizer model, does not support update (only the FaceRecognizer.LBPH supports it) and i am working with Eigenfaces and Fisherfaces. I tried to store it in a txt `std::ofstream output_file("./ppFaces.txt"); std::ostream_iterator<Mat> output_iterator(output_file, "\n"); std::copy(preprocessedFaces.begin(), preprocessedFaces.end(), output_iterator);` but when i read it back, the vector does not filled correct. Any ideas?