Example usage for org.opencv.imgproc Imgproc minEnclosingCircle

Introduction

In this page you can find the example usage for org.opencv.imgproc Imgproc minEnclosingCircle.

Prototype

public static void minEnclosingCircle(MatOfPoint2f points, Point center, float[] radius) 

Source Link

Usage

From source file:OCV_MinEnclosingCircle.java

License:Open Source License

@Override
public void run(ImageProcessor ip) {
    byte[] byteArray = (byte[]) ip.getPixels();
    int w = ip.getWidth();
    int h = ip.getHeight();
    int num_slice = ip.getSliceNumber();

    ArrayList<Point> lstPt = new ArrayList<Point>();
    MatOfPoint2f pts = new MatOfPoint2f();

    for (int y = 0; y < h; y++) {
        for (int x = 0; x < w; x++) {
            if (byteArray[x + w * y] != 0) {
                lstPt.add(new Point((double) x, (double) y));
            }//from w  w w  .  jav a2 s .c  om
        }
    }

    if (lstPt.isEmpty()) {
        return;
    }

    pts.fromList(lstPt);
    float[] radius = new float[1];
    Point center = new Point();
    Imgproc.minEnclosingCircle(pts, center, radius);
    showData(center.x, center.y, (double) radius[0], num_slice);
}

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From source file:simeav.filtros.instanciaciones.SeparadorTextoEstandar.java

@Override
public void separarTexto(Mat origin, int umbral_radio) {
    Mat original = origin.clone();//  ww  w.  ja v a 2  s .  c  o  m
    imagenSinTexto = original.clone();
    imagenTexto = Mat.zeros(original.size(), CvType.CV_8U);
    imagenTexto = imagenTexto.setTo(new Scalar(255, 255, 255));
    Mat imGrises = new Mat();
    Mat bw = new Mat();
    Imgproc.cvtColor(original, imGrises, Imgproc.COLOR_BGR2GRAY);
    Imgproc.GaussianBlur(imGrises, bw, new Size(1, 1), 0);
    Imgproc.threshold(bw, bw, 200, 250, Imgproc.THRESH_BINARY_INV);
    ArrayList<MatOfPoint> contornos = Utils.detectarContornos(bw);
    for (int i = 0; i < contornos.size(); i++) {
        MatOfPoint2f contorno2f = new MatOfPoint2f();
        contorno2f.fromList(contornos.get(i).toList());
        float[] radius = new float[1];
        Point centro = new Point();
        Imgproc.minEnclosingCircle(contorno2f, centro, radius);
        double a = Imgproc.contourArea(contornos.get(i));
        if (radius[0] <= umbral_radio) {
            Imgproc.drawContours(imagenSinTexto, contornos, i, new Scalar(255, 255, 255), -1);
            Imgproc.drawContours(imagenTexto, contornos, i, new Scalar(0, 0, 0), -1);
        }
    }
}

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