init - 初始化项目
This commit is contained in:
Lee Nony
@@ -0,0 +1,178 @@
|
||||
import java.awt.BorderLayout;
|
||||
import java.awt.Container;
|
||||
import java.awt.Image;
|
||||
import java.util.ArrayList;
|
||||
import java.util.List;
|
||||
import java.util.Random;
|
||||
|
||||
import javax.swing.BoxLayout;
|
||||
import javax.swing.ImageIcon;
|
||||
import javax.swing.JFrame;
|
||||
import javax.swing.JLabel;
|
||||
import javax.swing.JPanel;
|
||||
import javax.swing.JSlider;
|
||||
import javax.swing.event.ChangeEvent;
|
||||
import javax.swing.event.ChangeListener;
|
||||
|
||||
import org.opencv.core.Core;
|
||||
import org.opencv.core.CvType;
|
||||
import org.opencv.core.Mat;
|
||||
import org.opencv.core.MatOfPoint;
|
||||
import org.opencv.core.MatOfPoint2f;
|
||||
import org.opencv.core.Point;
|
||||
import org.opencv.core.Scalar;
|
||||
import org.opencv.core.Size;
|
||||
import org.opencv.highgui.HighGui;
|
||||
import org.opencv.imgcodecs.Imgcodecs;
|
||||
import org.opencv.imgproc.Imgproc;
|
||||
import org.opencv.imgproc.Moments;
|
||||
|
||||
class MomentsClass {
|
||||
private Mat srcGray = new Mat();
|
||||
private JFrame frame;
|
||||
private JLabel imgSrcLabel;
|
||||
private JLabel imgContoursLabel;
|
||||
private static final int MAX_THRESHOLD = 255;
|
||||
private int threshold = 100;
|
||||
private Random rng = new Random(12345);
|
||||
|
||||
public MomentsClass(String[] args) {
|
||||
//! [setup]
|
||||
/// Load source image
|
||||
String filename = args.length > 0 ? args[0] : "../data/stuff.jpg";
|
||||
Mat src = Imgcodecs.imread(filename);
|
||||
if (src.empty()) {
|
||||
System.err.println("Cannot read image: " + filename);
|
||||
System.exit(0);
|
||||
}
|
||||
|
||||
/// Convert image to gray and blur it
|
||||
Imgproc.cvtColor(src, srcGray, Imgproc.COLOR_BGR2GRAY);
|
||||
Imgproc.blur(srcGray, srcGray, new Size(3, 3));
|
||||
//! [setup]
|
||||
|
||||
//! [createWindow]
|
||||
// Create and set up the window.
|
||||
frame = new JFrame("Image Moments demo");
|
||||
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
|
||||
// Set up the content pane.
|
||||
Image img = HighGui.toBufferedImage(src);
|
||||
addComponentsToPane(frame.getContentPane(), img);
|
||||
//! [createWindow]
|
||||
// Use the content pane's default BorderLayout. No need for
|
||||
// setLayout(new BorderLayout());
|
||||
// Display the window.
|
||||
frame.pack();
|
||||
frame.setVisible(true);
|
||||
update();
|
||||
}
|
||||
|
||||
private void addComponentsToPane(Container pane, Image img) {
|
||||
if (!(pane.getLayout() instanceof BorderLayout)) {
|
||||
pane.add(new JLabel("Container doesn't use BorderLayout!"));
|
||||
return;
|
||||
}
|
||||
|
||||
JPanel sliderPanel = new JPanel();
|
||||
sliderPanel.setLayout(new BoxLayout(sliderPanel, BoxLayout.PAGE_AXIS));
|
||||
|
||||
//! [trackbar]
|
||||
sliderPanel.add(new JLabel("Canny threshold: "));
|
||||
JSlider slider = new JSlider(0, MAX_THRESHOLD, threshold);
|
||||
slider.setMajorTickSpacing(20);
|
||||
slider.setMinorTickSpacing(10);
|
||||
slider.setPaintTicks(true);
|
||||
slider.setPaintLabels(true);
|
||||
slider.addChangeListener(new ChangeListener() {
|
||||
@Override
|
||||
public void stateChanged(ChangeEvent e) {
|
||||
JSlider source = (JSlider) e.getSource();
|
||||
threshold = source.getValue();
|
||||
update();
|
||||
}
|
||||
});
|
||||
//! [trackbar]
|
||||
sliderPanel.add(slider);
|
||||
pane.add(sliderPanel, BorderLayout.PAGE_START);
|
||||
|
||||
JPanel imgPanel = new JPanel();
|
||||
imgSrcLabel = new JLabel(new ImageIcon(img));
|
||||
imgPanel.add(imgSrcLabel);
|
||||
|
||||
Mat blackImg = Mat.zeros(srcGray.size(), CvType.CV_8U);
|
||||
imgContoursLabel = new JLabel(new ImageIcon(HighGui.toBufferedImage(blackImg)));
|
||||
imgPanel.add(imgContoursLabel);
|
||||
|
||||
pane.add(imgPanel, BorderLayout.CENTER);
|
||||
}
|
||||
|
||||
private void update() {
|
||||
//! [Canny]
|
||||
/// Detect edges using Canny
|
||||
Mat cannyOutput = new Mat();
|
||||
Imgproc.Canny(srcGray, cannyOutput, threshold, threshold * 2);
|
||||
//! [Canny]
|
||||
|
||||
//! [findContours]
|
||||
/// Find contours
|
||||
List<MatOfPoint> contours = new ArrayList<>();
|
||||
Mat hierarchy = new Mat();
|
||||
Imgproc.findContours(cannyOutput, contours, hierarchy, Imgproc.RETR_TREE, Imgproc.CHAIN_APPROX_SIMPLE);
|
||||
//! [findContours]
|
||||
|
||||
/// Get the moments
|
||||
List<Moments> mu = new ArrayList<>(contours.size());
|
||||
for (int i = 0; i < contours.size(); i++) {
|
||||
mu.add(Imgproc.moments(contours.get(i)));
|
||||
}
|
||||
|
||||
/// Get the mass centers
|
||||
List<Point> mc = new ArrayList<>(contours.size());
|
||||
for (int i = 0; i < contours.size(); i++) {
|
||||
//add 1e-5 to avoid division by zero
|
||||
mc.add(new Point(mu.get(i).m10 / (mu.get(i).m00 + 1e-5), mu.get(i).m01 / (mu.get(i).m00 + 1e-5)));
|
||||
}
|
||||
|
||||
//! [zeroMat]
|
||||
/// Draw contours
|
||||
Mat drawing = Mat.zeros(cannyOutput.size(), CvType.CV_8UC3);
|
||||
//! [zeroMat]
|
||||
//! [forContour]
|
||||
for (int i = 0; i < contours.size(); i++) {
|
||||
Scalar color = new Scalar(rng.nextInt(256), rng.nextInt(256), rng.nextInt(256));
|
||||
Imgproc.drawContours(drawing, contours, i, color, 2);
|
||||
Imgproc.circle(drawing, mc.get(i), 4, color, -1);
|
||||
}
|
||||
//! [forContour]
|
||||
|
||||
//! [showDrawings]
|
||||
/// Show in a window
|
||||
imgContoursLabel.setIcon(new ImageIcon(HighGui.toBufferedImage(drawing)));
|
||||
frame.repaint();
|
||||
//! [showDrawings]
|
||||
|
||||
/// Calculate the area with the moments 00 and compare with the result of the OpenCV function
|
||||
System.out.println("\t Info: Area and Contour Length \n");
|
||||
for (int i = 0; i < contours.size(); i++) {
|
||||
System.out.format(" * Contour[%d] - Area (M_00) = %.2f - Area OpenCV: %.2f - Length: %.2f\n", i,
|
||||
mu.get(i).m00, Imgproc.contourArea(contours.get(i)),
|
||||
Imgproc.arcLength(new MatOfPoint2f(contours.get(i).toArray()), true));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public class MomentsDemo {
|
||||
public static void main(String[] args) {
|
||||
// Load the native OpenCV library
|
||||
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
|
||||
|
||||
// Schedule a job for the event dispatch thread:
|
||||
// creating and showing this application's GUI.
|
||||
javax.swing.SwingUtilities.invokeLater(new Runnable() {
|
||||
@Override
|
||||
public void run() {
|
||||
new MomentsClass(args);
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user