Example usage for org.opencv.imgproc Imgproc line

Introduction

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

Prototype

public static void line(Mat img, Point pt1, Point pt2, Scalar color, int thickness, int lineType, int shift) 

Source Link

Usage

From source file:edu.soict.hust.k57.mmdb.components.HistogramImageBulder.java

private ImageIcon createImageIcon(Mat hist, int bin, Channel c) {
    int hist_w = 150; // width of the histogram image
    int hist_h = 100; // height of the histogram image
    int bin_w = (int) Math.round(hist_w * 1.0 / bin);

    Mat histImage = new Mat(hist_h, hist_w, CvType.CV_8UC3, new Scalar(80, 60, 60));
    Mat normalizeHist = hist.clone();/* ww w  . j a va2 s. c om*/
    Core.normalize(normalizeHist, normalizeHist, 0, histImage.rows(), Core.NORM_MINMAX, -1, new Mat());

    Scalar scalar = null;
    switch (c) {
    case B:
        scalar = new Scalar(255, 0, 0);
        break;
    case G:
        scalar = new Scalar(0, 255, 0);
        break;
    case R:
        scalar = new Scalar(0, 0, 255);
    }

    for (int i = 1; i < bin; i++) {
        Imgproc.line(histImage, new Point(bin_w * (i - 1), hist_h - Math.round(normalizeHist.get(i - 1, 0)[0])),
                new Point(bin_w * (i), hist_h - Math.round(normalizeHist.get(i - 1, 0)[0])), scalar, 1, 8, 0);
        Imgproc.line(histImage, new Point(bin_w * (i), hist_h - Math.round(normalizeHist.get(i - 1, 0)[0])),
                new Point(bin_w * (i), hist_h - Math.round(normalizeHist.get(i, 0)[0])), scalar, 1, 8, 0);
    }
    MatOfByte buffer = new MatOfByte();
    Imgcodecs.imencode(".png", histImage, buffer);
    return new ImageIcon(buffer.toArray());
}

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