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

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#include "opencv2/datasets/gr_chalearn.hpp"

#include <opencv2/core.hpp>

#include <cstdio>

#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 folder }";
    CommandLineParser parser(argc, argv, keys);
    string path(parser.get<string>("path"));
    if (parser.has("help") || path=="true")
    {
        parser.printMessage();
        return -1;
    }

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

    // ***************
    // dataset contains information for each sample.
    // For example, let output dataset size and first element.
    printf("train size: %u\n", (unsigned int)dataset->getTrain().size());
    printf("validation size: %u\n", (unsigned int)dataset->getValidation().size());
    GR_chalearnObj *example = static_cast<GR_chalearnObj *>(dataset->getTrain()[0].get());
    printf("first dataset sample:\n%s\n", example->name.c_str());
    printf("color video:\n%s\n", example->nameColor.c_str());
    printf("depth video:\n%s\n", example->nameDepth.c_str());
    printf("user video:\n%s\n", example->nameUser.c_str());
    printf("video:\nnumber of frames: %u\nfps: %u\nmaximum depth: %u\n", example->numFrames, example->fps, example->depth);
    for (vector<groundTruth>::iterator it=example->groundTruths.begin(); it!=example->groundTruths.end(); ++it)
    {
        printf("gestureID: %u, initial frame: %u, last frame: %u\n", (*it).gestureID, (*it).initialFrame, (*it).lastFrame);
    }
    printf("skeletons number: %u\n", (unsigned int)example->skeletons.size());
    skeleton &last = example->skeletons.back();
    printf("last skeleton:\n");
    for (unsigned int i=0; i<20; ++i)
    {
        printf("Wx: %f, Wy: %f, Wz: %f, Rx: %f, Ry: %f, Rz: %f, Rw: %f, Px: %f, Py: %f\n",
               last.s[i].Wx, last.s[i].Wy, last.s[i].Wz, last.s[i].Rx,
               last.s[i].Ry, last.s[i].Rz, last.s[i].Rw, last.s[i].Px, last.s[i].Py);
    }

    return 0;
}