how to find coordinates after using Houghlinep function in opencv

Asked Jun 30 '17 at 06:52

Active Jun 30 '17 at 08:41

Viewed 114 times

Hi guys i'm new to OpenCV. I'm using opencv to remove lines and get removed coordinates from image. I'm using HoughlineP like this

Mat src = imread("F:/003-00.jpg", IMREAD_GRAYSCALE);

Mat bw;
blur(src, bw, Size(3, 3));
pyrDown(bw, bw);

//threshold(bw, bw, 170, 255, THRESH_BINARY_INV);
Canny(bw, bw, 100, 200, 3);


Mat color_dst = Mat::zeros(bw.size(), CV_8UC1);
vector<Vec4i> lines;

HoughLinesP(bw, lines, 1, CV_PI / 180, 400, 300, 20);
for (size_t i = 0; i < lines.size(); i++)
{

    line(color_dst, Point(lines[i][0], lines[i][1]),
        Point(lines[i][2], lines[i][3]), Scalar(255, 255, 255), 3);

}


imwrite("F:/result.jpg", color_dst);

and i got a result image like this HoughlinesP Output

but one line actually contains many of child lines and group to one bold line Now I want to erode,group, and normally it to one line with two Point begin , end for every line

Here is input image Input image

edited Jun 30 '17 at 08:41

asked Jun 30 '17 at 06:52

Hoang Vu Kim

U just want to remove these lines from the actual image. Can you further clarify. – Anubhav Rohatgi Jun 30 '17 at 08:05
Give me the actual image I will solve it here – Anubhav Rohatgi Jun 30 '17 at 08:05
[sample input images](http://imgur.com/a/egGxa) Anubhav Rohatgi thanks you very much! – Hoang Vu Kim Jun 30 '17 at 08:40
so do you want only the lines to be removed from the image or do you want the vector of lines? – Anubhav Rohatgi Jun 30 '17 at 09:51
If you draw the lines as white on top of the image instead of a new black image, it will draw white over the black lines. But the black image with lines can tell you where the pixels were removed from---just check the indices of each white pixel in the black/white line image. – alkasm Jun 30 '17 at 14:44

how to find coordinates after using Houghlinep function in opencv

0 Answers0