OpenCV  3.0.0-dev
Open Source Computer Vision
lsd_lines.cpp

An example using the LineSegmentDetector

#include <iostream>
#include <string>
using namespace std;
using namespace cv;
int main(int argc, char** argv)
{
std::string in;
if (argc != 2)
{
std::cout << "Usage: lsd_lines [input image]. Now loading ../data/building.jpg" << std::endl;
in = "../data/building.jpg";
}
else
{
in = argv[1];
}
Mat image = imread(in, IMREAD_GRAYSCALE);
#if 0
Canny(image, image, 50, 200, 3); // Apply canny edge
#endif
// Create and LSD detector with standard or no refinement.
#if 1
#else
#endif
double start = double(getTickCount());
vector<Vec4f> lines_std;
// Detect the lines
ls->detect(image, lines_std);
double duration_ms = (double(getTickCount()) - start) * 1000 / getTickFrequency();
std::cout << "It took " << duration_ms << " ms." << std::endl;
// Show found lines
Mat drawnLines(image);
ls->drawSegments(drawnLines, lines_std);
imshow("Standard refinement", drawnLines);
return 0;
}