package pool.tests;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.Point;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.highgui.Highgui;
import org.opencv.imgproc.Imgproc;
import pool.utils.CVLoader;
import pool.utils.ImgWindow;
public class HoughLines {
public static void main (String[] args) {
CVLoader.load();
// load the image
Mat img = Highgui.imread("data/topdown-6.jpg");
// generate gray scale and blur
Mat gray = new Mat();
Imgproc.cvtColor(img, gray, Imgproc.COLOR_BGR2GRAY);
Imgproc.blur(gray, gray, new Size(3, 3));
// detect the edges
Mat edges = new Mat();
int lowThreshold = 50;
int ratio = 3;
Imgproc.Canny(gray, edges, lowThreshold, lowThreshold * ratio);
Mat lines = new Mat();
Imgproc.HoughLinesP(edges, lines, 1, Math.PI / 180, 50, 50, 10);
for(int i = 0; i < lines.cols(); i++) {
double[] val = lines.get(0, i);
Core.line(img, new Point(val[0], val[1]), new Point(val[2], val[3]), new Scalar(0, 0, 255), 2);
}
ImgWindow.newWindow(edges);
ImgWindow.newWindow(gray);
ImgWindow.newWindow(img);
}
}
