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

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#include "opencv2/datasets/or_imagenet.hpp"

#include <opencv2/core.hpp>

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

#include <string>
#include <vector>
#include <set>

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

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

    // ***************
    // dataset contains for each object its id & image path
    // For example, let output train\test\validation size and first image.
    vector< Ptr<Object> > &curr = dataset->getTrain();
    printf("train:\nsize: %u\n", (unsigned int)curr.size());
    OR_imagenetObj *example = static_cast<OR_imagenetObj *>(curr[0].get());
    printf("first image:\n");
    printf("image: %s\n", example->image.c_str());
    printf("id: %u\n", example->id);

    vector< Ptr<Object> > &currT = dataset->getTest();
    printf("test:\nsize: %u\n", (unsigned int)currT.size());
    example = static_cast<OR_imagenetObj *>(currT[0].get());
    printf("first image:\n");
    printf("image: %s\n", example->image.c_str());
    printf("id: %u\n", example->id);

    vector< Ptr<Object> > &currV = dataset->getValidation();
    printf("validation:\nsize: %u\n", (unsigned int)currV.size());
    example = static_cast<OR_imagenetObj *>(currV[0].get());
    printf("first image:\n");
    printf("image: %s\n", example->image.c_str());
    printf("id: %u\n", example->id);

    return 0;
}