High Dynamic Range Imaging(HDR)

// Reference : http://docs.opencv.org/3.0.0/d3/db7/tutorial_hdr_imaging.html
// Examples : High Dynamic Range Imaging(HDR)
 
#include <cv.hpp>
#include <iostream>
#include <fstream>
 
using namespace std;
using namespace cv;
 
void loadExposureSqe(String path, vector<Mat>& images, vector<float>&times)
{
    path = path + std::string("/");
    ifstream list_file((path + "list.txt").c_str());
 
    string name;
    float val;
 
    while (list_file >> name >> val) {
        Mat img = imread(path + name);
        images.push_back(img);
        times.push_back(1 / val);
    }
 
    list_file.close();
}
 
int main()
{
    vector<Mat> images;
    vector<float> times;
    loadExposureSqe("hdr/exposures", images, times);
 
    Mat response;
    Ptr<CalibrateDebevec>  calibrate = createCalibrateDebevec();
    calibrate->process(images, response, times);
 
    Mat hdr;
    Ptr<MergeDebevec> merge_debevec = createMergeDebevec();
    merge_debevec->process(images, hdr, times, response);
 
    Mat ldr;
    Ptr<TonemapDurand> tonemap = createTonemapDurand(2.2f);
    tonemap->process(hdr, ldr);
 
    Mat fusion;
    Ptr<MergeMertens> merge_mertens = createMergeMertens();
    merge_mertens->process(images, fusion);
 
    imwrite("hdr/fusion.png", fusion * 255);
    imwrite("hdr/ldr.png", ldr * 255);
    imwrite("hdr/hdr.hdr", hdr);
    
    return 0;
}

hdr.zip