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Added the update on the sample.

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This commit is contained in:
Daniel Angelov 2013-07-22 13:49:33 +03:00
parent 6fa4834f31
commit 982ccd784e
1 changed files with 24 additions and 21 deletions
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45
samples/cpp/lsd_lines.cpp
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@ -11,37 +11,40 @@ using namespace cv;
int main(int argc, char** argv)
{
std::string in;
if (argc != 2)
{
std::cout << "lsd_lines [input image]" << std::endl;
return false;
std::cout << "Usage: lsd_lines [input image]. Now loading building.jpg" << std::endl;
in = "building.jpg";
}
else
{
in = argv[1];
}
std::string in = argv[1];
Mat image = imread(in, IMREAD_GRAYSCALE);
// Create and LSD detector with std refinement.
LineSegmentDetector* lsd_std = createLineSegmentDetectorPtr(LSD_REFINE_STD);
#if 0
Canny(image, image, 50, 200, 3); // Apply canny edge
#endif
// Create and LSD detector with standard or no refinement.
#if 1
Ptr<LineSegmentDetector> ls = createLineSegmentDetectorPtr(LSD_REFINE_STD);
#else
Ptr<LineSegmentDetector> ls = createLineSegmentDetectorPtr(LSD_REFINE_NONE);
#endif
double start = double(getTickCount());
vector<Vec4i> lines_std;
lsd_std->detect(image, lines_std);
// Detect the lines
ls->detect(image, lines_std);
double duration_ms = (double(getTickCount()) - start) * 1000 / getTickFrequency();
std::cout << "OpenCV STD (blue) - " << duration_ms << " ms." << std::endl;
// Create an LSD detector with no refinement applied.
LineSegmentDetector* lsd_none = createLineSegmentDetectorPtr(LSD_REFINE_NONE);
start = double(getTickCount());
vector<Vec4i> lines_none;
lsd_none->detect(image, lines_none);
duration_ms = (double(getTickCount()) - start) * 1000 / getTickFrequency();
std::cout << "OpenCV NONE (red)- " << duration_ms << " ms." << std::endl;
std::cout << "Overlapping pixels are shown in purple." << std::endl;
Mat difference = Mat::zeros(image.size(), CV_8UC1);
lsd_none->compareSegments(image.size(), lines_std, lines_none, &difference);
imshow("Line difference", difference);
std::cout << "It took " << duration_ms << " ms." << std::endl;
// Show found lines
Mat drawnLines(image);
lsd_none->drawSegments(drawnLines, lines_std);
imshow("Standard refinement", drawnLines);