Web Cam Capture Program

-

Hello everyone, in this post I am going to publish a web cam capture program using Java.
1.      First, you have to download OpenCV library using this link. (https://opencv.org/releases/)
2.      Create a new NetBeans project and add OpenCV library.
3.      You can create your GUI now.






4.      This is the code for project

import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.JFileChooser;
import java.io.ByteArrayInputStream;
import javax.imageio.ImageIO;
import javax.swing.JOptionPane;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfByte;
import org.opencv.highgui.HighGui;
import org.opencv.videoio.VideoCapture;
import org.opencv.imgcodecs.Imgcodecs;

public class Camera extends javax.swing.JFrame {

private DaemonThread myThread = null;
int count = 0;
VideoCapture webSource = null;

Mat frame = new Mat();
MatOfByte mem = new MatOfByte();

class DaemonThread implements Runnable
{
protected volatile boolean runnable = false;

@Override
public  void run()
{
synchronized(this)
{
while(runnable)
{
if(webSource.grab())
{
try
{
webSource.retrieve(frame);
Imgcodecs.imencode(".bmp", frame, mem);

Image im = ImageIO.read(new ByteArrayInputStream(mem.toArray()));

BufferedImage buff = (BufferedImage) im;
Graphics g=jPanel1.getGraphics();

if (g.drawImage(buff, 0, 0, getWidth(), getHeight() -150 , 0, 0, buff.getWidth(), buff.getHeight(), null))

if(runnable == false)
{
System.out.println("Going to wait()");
this.wait();
}
}
catch(Exception ex)
{
System.out.println("Error");
}
}
}
}
}
}

public Camera() {
initComponents();
}
//Generated Code
//Start Web Cam Button
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
webSource =new VideoCapture(0);
myThread = new DaemonThread();
Thread t = new Thread(myThread);
t.setDaemon(true);
myThread.runnable = true;
t.start();
jButton1.setEnabled(false);
jButton2.setEnabled(true;
}

//Pause Button
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
myThread.runnable = false;
jButton2.setEnabled(false);
jButton1.setEnabled(true);
webSource.release();

}

// Capture Button
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
try
{

String  file ="C:/Users/user/Desktop/mypic.jpg";
Imgcodecs.imwrite(file, frame);
}
catch(Exception ex)
{
System.out.println(ex);
}

}

public static void main(String args[]) {
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

//Generated Code

java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Camera().setVisible(true);
}
});
}
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JFileChooser jFileChooser1;
private javax.swing.JPanel jPanel1;
}

5.      After Capturing the image, it will be saved in the desktop.

Comments

Post a Comment

Popular posts from this blog

C# Analog Clock

-
Image
Today we are going to design analog clock as the first post in 2017. We can add digital clock to C# form very easily using “DateTimePicker”. Analog Clock cannot add like that. We must design it for our form. Let’s design an analog clock. First of all add a new form (Analog Clock) to your application. Next add a “pictureBox” and a “timer” to the form. As the next step write the following code. using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Drawing.Printing; using System.Globalization; using System.IO; namespace Clock {     public partial class Form1 : Form     {         Bitmap bmp;         Graphics g;         Timer t = new Timer ();      int WIDTH = 100, HEIGHT = 100, secHAND = 50, minHAND = 50, hrHAND =  25;       int cx, cy;         public Form1()  
Read more

Basic Prolog (List)

-
1.       How to find last element from a list Code: lastelement([A],A). lastelement([_|A],B):- lastelement(A,B). Output: lastelement([a,b,c,d],X). X = d . 2.       How to find n th element of a list Code: element_at(X,[X|_],1). element_at(X,[_|T],Y):- element_at(X,T,Y1), Y is Y1+1. Output: element_at(X,[a,b,c,d],2). X = b . 3.       How to check whether the element available or not Code: mem([X|_],X). mem([_|T],X):- mem(T,X). Output: mem([a,b,c,d],a). true .  4.       How to print all members Code: mem([X|_],X). mem([_|T],X):- mem(T,X). Output: mem([a,b,c,d],X). X = a ; X = b ; X = c ; X = d ; false. There is a “Prolog” keyword to find member of list. We can use it directly. 4.1. ?- member(X,[a,b,c,d]). X = a ; X = b ; X = c ; X = d. 4.2. ?- member(b,[a,b,c,d]). True 5.       How to find the length of the list Code: list_length([],0). list_length([_|T],X):- list_length(T,X1),X is X1+1. O
Read more

SOLID Principles

-
Image
In Object-Oriented Programming (OOP) Concept, SOLID principles are the acronym for five Object-Oriented Design (OOD) principles. These SOLID principles are used to improve the understand-ability, flexibility and maintainability of the code.   S.O.L.I.D. Stands For? 1.      S - Single-responsibility principle 2.      O - Open-closed principle 3.      L - Liskov substitution principle 4.      I - Interface segregation principle 5.      D - Dependency Inversion Principle   Let’s see what is the exact meaning of each principle using an example. Ex: There is an online store. A registered customer can place an order and purchase them using the card or make payment when delivering the order. Let’s move to the principles again.   1.      Single-Responsibility Principle The common definition of this principle is “A class should have one and only one reason to change, meaning that a class should have only one job.” When we consider the above online store, there is a class
Read more