Snapshot from System Camera

Problem Description

How to take a snapshot from system camera using java.


Following is the program to take a snapshot from system camera using java.

import java.awt.image.BufferedImage;
import java.awt.image.DataBufferByte;
import java.awt.image.WritableRaster;


import javafx.application.Application;
import javafx.embed.swing.SwingFXUtils;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.image.ImageView;
import javafx.scene.image.WritableImage;
import javafx.stage.Stage;

import org.opencv.core.Core; 
import org.opencv.core.Mat; 
import org.opencv.videoio.VideoCapture;  

public class TakingSnapshotUsingCamera extends Application { 
   Mat matrix = null; 

   public void start(Stage stage) throws FileNotFoundException, IOException {        
      //Capturing the snapshot from the camera 
      TakingSnapshotUsingCamera obj = new TakingSnapshotUsingCamera(); 
      WritableImage writableImage = obj.capureSnapShot();  

      //Setting the image view 
      ImageView imageView = new ImageView(writableImage); 
      //setting the fit height and width of the image view 
      //Setting the preserve ratio of the image view 
      //Creating a Group object  
      Group root = new Group(imageView); 
      //Creating a scene object 
      Scene scene = new Scene(root, 600, 400); 
      //Setting title to the Stage 
      stage.setTitle("Capturing an image"); 
      //Adding scene to the satge 
      //Displaying the contents of the stage;       
   public WritableImage capureSnapShot() { 
      WritableImage WritableImage = null; 

      //Loading the OpenCV core library  
      System.loadLibrary( Core.NATIVE_LIBRARY_NAME );        

      //Instantiating the VideoCapture class (camera:: 0) 
      VideoCapture capture = new VideoCapture(0);     

      //Reading the next video frame from the camera 
      Mat matrix = new Mat();; 

      //If camera is opened  
      if(capture.isOpened()) { 
         //If there is next video frame 
         if ( {      
            //Creating BuffredImage from the matrix 
            BufferedImage image = new BufferedImage(matrix.width(), matrix.height(), 
            WritableRaster raster = image.getRaster(); 
            DataBufferByte dataBuffer = (DataBufferByte) raster.getDataBuffer(); 
            byte[] data = dataBuffer.getData(); 
            matrix.get(0, 0, data); 
            this.matrix = matrix; 

            //Creating the Writable Image 
            WritableImage = SwingFXUtils.toFXImage(image, null); 
      return WritableImage; 
   public static void main(String args[]) {  


Snapshot Output