openCv

#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>

void help()
{
    std::cout << "\nThis program demonstrates line finding with the Hough transform.\n"
        "Usage:\n"
        "./houghlines <image_name>, Default is pic1.jpg\n" << std::endl;
    system("pause");
}

int  main(int argc, char** argv)
{
    //const char* filename = argc >= 2 ? argv[1] : "C:\temp\test.jpg";
    const char* filename = "C://temp//test3.jpg";
    std::cout << "OpenCV Version: " << CV_VERSION << std::endl;
    //IplImage* img = cvLoadImage("c://frame_201.bmp");
    cv::Mat src = cv::imread(filename, 0);

    if (src.empty())
    {
        help();
        std::cout << "can not open " << filename << std::endl;
        return -1;
    }

    cv::Mat dst, cdst;
    cv::Canny(src, dst, 100, 300, 3);
    cv::cvtColor(dst, cdst, cv::COLOR_GRAY2BGR);

    std::vector<cv::Vec4i> lines;
    //
    HoughLinesP(dst, lines, 1, CV_PI / 2, 200, 200, 5);
    for (size_t i = 0; i < lines.size(); i++)
    {
        cv::Vec4i l = lines[i];
        line(cdst, cv::Point(l[0], l[1]), cv::Point(l[2], l[3]), cv::Scalar(0, 0, 255), 3, cv::LINE_AA);
    }
    imshow("source", src);
    imshow("detected lines", cdst);
    cv::imwrite("LineDetection.jpg", cdst);
    cv::waitKey();

    return 0;
}