OpenCV/opencv_contrib/modules/datasets/samples/ar_sports.cpp

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#include "opencv2/datasets/ar_sports.hpp"

#include <opencv2/core.hpp>

#include <cstdio>
#include <cstdlib> // atoi

#include <string>
#include <vector>

using namespace std;
using namespace cv;
using namespace cv::datasets;

int main(int argc, char *argv[])
{
    const char *keys =
            "{ help h usage ? |    | show this message }"
            "{ path p         |true| path to dataset description }";
    CommandLineParser parser(argc, argv, keys);
    string path(parser.get<string>("path"));
    if (parser.has("help") || path=="true")
    {
        parser.printMessage();
        return -1;
    }

    Ptr<AR_sports> dataset = AR_sports::create();
    dataset->load(path);

    // ***************
    // dataset. train & test contains for each video url in dataset all it's labels.
    // For example, let output the first element in test dataset and it's labels.
    // And sizes of both datasets.
    printf("train size: %u\n", (unsigned int)dataset->getTrain().size());
    printf("test size: %u\n", (unsigned int)dataset->getTest().size());

    AR_sportsObj *example = static_cast<AR_sportsObj *>(dataset->getTest()[0].get());
    printf("url: %s\n", example->videoUrl.c_str());
    printf("labels: ");
    vector<int> &labels = example->labels;
    for (vector<int>::iterator it=labels.begin(); it!=labels.end(); ++it)
    {
        printf("%u ", *it);
    }
    printf("\n");

    return 0;
}