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

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#include "opencv2/datasets/ir_affine.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 folder }";
    CommandLineParser parser(argc, argv, keys);
    string path(parser.get<string>("path"));
    if (parser.has("help") || path=="true")
    {
        parser.printMessage();
        return -1;
    }

    // loading dataset
    Ptr<IR_affine> dataset = IR_affine::create();
    dataset->load(path);

    // ***************
    // dataset contains for each image in dataset it's matrix.
    // For example, let output the last element in dataset and it's matrix.
    // And dataset size.
    printf("size: %u\n", (unsigned int)dataset->getTrain().size());

    IR_affineObj *example = static_cast<IR_affineObj *>(dataset->getTrain().back().get());
    printf("image name: %s\n", example->imageName.c_str());
    printf("matrix:\n");
    for (int i=0; i<3; ++i)
    {
        for (int j=0; j<3; ++j)
        {
            printf("%f ", example->mat(i, j));
        }
        printf("\n");
    }

    return 0;
}