Adding noise to a signal using java: Please help me as I have spent many hours t

Question

Adding noise to a signal using java:

Please help me as I have spent many hours trying to figure this out

Im trying to add Guassain noise to the following signal by prompting the user to enter a number as a percentage. The code thats that needs the noise added is below. Please help.

// Import the required libraries
import java.util.Random;
import java.util.Scanner;
import java.awt.*;
import java.awt.geom.GeneralPath;
import javax.swing.*;

// noise class
public class noise extends JPanel {

private static final long serialVersionUID = 1L;
// wave path
GeneralPath wave;

// The constructor
public noise() {
Dimension d = getPreferredSize();
d.width = 30000;
setPreferredSize(d);
}

// paint component
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
if (wave == null)
initWave();
g2.setPaint(Color.black);
g2.draw(wave);
}

private void initWave() {
// create the square wave line
float w = getWidth();
float h = getHeight();
float approxCycles = w / (2 * 100);
// calculate dx for the totalWidth (w-1)
float dx = (w - 1) / (int) Math.round(2 * approxCycles);
float dy = h / 4; // 100 for a wave height of 200
float step = 2 * dx;
int steps = (int) (w / step);
wave = new GeneralPath();
float x = 0, y = h / 2;
wave.moveTo(x, y);
for (int j = 0; j < steps; j++) {
wave.lineTo(x, y - dy);
x += dx;
wave.lineTo(x, y - dy);
wave.lineTo(x, y + dy);
x += dx;
wave.lineTo(x, y + dy);
wave.lineTo(x, y);
}
  
}

// Here is the main method
public static void main(String[] args) {
  
// Create the frame
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(new JScrollPane(new noise()));
f.setTitle("Square wave.");
// frame size
f.setSize(1400, 400);
// frame location
f.setLocation(200, 200);
f.setVisible(true);
}

}

Explanation / Answer

// Import the required libraries import java.util.Random; import java.util.Scanner; import java.awt.*; import java.awt.geom.GeneralPath; import javax.swing.*; // noise class public class noise extends JPanel { private static final long serialVersionUID = 1L; // wave path GeneralPath wave; private float percentage; private Random random; // The constructor public noise() { Dimension d = getPreferredSize(); d.width = 30000; random = new Random(); setPreferredSize(d); } // paint component protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2 = (Graphics2D) g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); if (wave == null) initWave(); g2.setPaint(Color.black); g2.draw(wave); } private void initWave() { // create the square wave line float w = getWidth(); float h = getHeight(); float approxCycles = w / (2 * 100); // calculate dx for the totalWidth (w-1) float dx = (w - 1) / (int) Math.round(2 * approxCycles); float dy = h / 4; // 100 for a wave height of 200 float step = 2 * dx; int steps = (int) (w / step); wave = new GeneralPath(); float x = 0, y = h / 2; wave.moveTo(x, y); for (int j = 0; j

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.