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.