mirror of https://github.com/davisking/dlib.git
94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
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/*
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Train the venerable LeNet from
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LeCun, Yann, et al. "Gradient-based learning applied to document recognition."
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Proceedings of the IEEE 86.11 (1998): 2278-2324.
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on MNIST
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*/
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#include <dlib/dnn.h>
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#include <iostream>
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#include <dlib/data_io.h>
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using namespace std;
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using namespace dlib;
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int main(int argc, char** argv) try
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{
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if (argc != 2)
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{
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cout << "give MNIST data folder!" << endl;
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return 1;
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}
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std::vector<matrix<unsigned char>> training_images;
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std::vector<unsigned long> training_labels;
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std::vector<matrix<unsigned char>> testing_images;
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std::vector<unsigned long> testing_labels;
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load_mnist_dataset(argv[1], training_images, training_labels, testing_images, testing_labels);
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typedef loss_multiclass_log<fc<relu<fc<relu<fc<max_pool<relu<con<max_pool<relu<con<
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input<matrix<unsigned char>>>>>>>>>>>>>> net_type;
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net_type net(fc_(10),
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relu_(),
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fc_(84),
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relu_(),
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fc_(120),
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max_pool_(2,2,2,2),
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relu_(),
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con_(16,5,5),
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max_pool_(2,2,2,2),
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relu_(),
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con_(6,5,5));
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dnn_trainer<net_type> trainer(net,sgd(0.1));
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trainer.set_mini_batch_size(128);
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trainer.be_verbose();
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trainer.set_synchronization_file("mnist_sync", std::chrono::seconds(20));
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trainer.train(training_images, training_labels);
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net.clean();
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serialize("mnist_network.dat") << net;
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// Run the net on all the data to get predictions
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std::vector<unsigned long> predicted_labels = net(training_images);
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int num_right = 0;
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int num_wrong = 0;
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for (size_t i = 0; i < training_images.size(); ++i)
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{
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if (predicted_labels[i] == training_labels[i])
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++num_right;
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else
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++num_wrong;
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}
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cout << "training num_right: " << num_right << endl;
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cout << "training num_wrong: " << num_wrong << endl;
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cout << "training accuracy: " << num_right/(double)(num_right+num_wrong) << endl;
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predicted_labels = net(testing_images);
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num_right = 0;
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num_wrong = 0;
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for (size_t i = 0; i < testing_images.size(); ++i)
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{
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if (predicted_labels[i] == testing_labels[i])
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++num_right;
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else
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++num_wrong;
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}
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cout << "testing num_right: " << num_right << endl;
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cout << "testing num_wrong: " << num_wrong << endl;
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cout << "testing accuracy: " << num_right/(double)(num_right+num_wrong) << endl;
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}
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catch(std::exception& e)
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{
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cout << e.what() << endl;
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}
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