Twain em java (Digitalização)

public class Scan_ extends JFrame implements PlugIn, ScannerListener {


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	public void update(ScannerIOMetadata.Type type, ScannerIOMetadata metadata) {

		if (type.equals(ScannerIOMetadata.ACQUIRED)) {

			ImagePlus imp = new ImagePlus("Scan", metadata.getImage());
			imp.show();
			/* inicio alteração teste */
			File arquivo = new File("C:\\scan.tif");
			FileSaver salvador = new FileSaver(imp);
			salvador.saveAsTiff(arquivo.getName());
			/* fim alteração teste */

BufferedImage image=metadata.getImage();

      try{

         FileOutputStream outputStream = new FileOutputStream(sArquivo);

        ImageIO.write(image, "JPEG", outputStream);

        outputStream.close();

    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }

import ij.IJ;
import ij.ImagePlus;
import ij.io.FileSaver;
import ij.plugin.PlugIn;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Calendar;
//import java.util.Calendar;
//import java.util.Date;
//import java.util.GregorianCalendar;

import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import uk.co.mmscomputing.device.scanner.Scanner;
import uk.co.mmscomputing.device.scanner.ScannerDevice;
import uk.co.mmscomputing.device.scanner.ScannerIOException;
import uk.co.mmscomputing.device.scanner.ScannerIOMetadata;
import uk.co.mmscomputing.device.scanner.ScannerListener;
import javax.swing.WindowConstants;

public class Scan_ extends JFrame implements PlugIn, ScannerListener {

	// Sem essa linha do "serialVersionUID" não funciona, não entendi pq
	private static final long serialVersionUID = 1L;
	private JPanel jContentPane = null;
	private JButton jButton = null;
	private JButton jButton1 = null;
	private Scanner scanner;

	public static void main(String[] args) {
		new Scan_().setVisible(true);
	}

	public void run(String arg0) {

		new Scan_().setVisible(true);
	}

	/**
	 * Constructor
	 */
	public Scan_() {
		super();
		initialize();
		try {
			scanner = Scanner.getDevice();
			scanner.addListener(this);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	private void initialize() {
		this.setSize(300, 120);
		this.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
		this.setResizable(false);
		this.setContentPane(getJContentPane());
		this.setTitle("Scan");
		this.addWindowListener(new java.awt.event.WindowAdapter() {
			public void windowClosing(java.awt.event.WindowEvent e) {

			}
		});
	}

	/**
	 * Esse metodo inicializa o jContentPane
	 * 
	 */
	private JPanel getJContentPane() {
		if (jContentPane == null) {
			jContentPane = new JPanel();
			jContentPane.setLayout(null);
			jContentPane.add(getJButton(), null);
			jContentPane.add(getJButton1(), null);
		}
		return jContentPane;
	}

	/**
	 * Esse metodo inicializa o jButton
	 */
	private JButton getJButton() {
		if (jButton == null) {
			jButton = new JButton();
			jButton.setBounds(new Rectangle(4, 16, 131, 42));
			jButton.setText("Select Device");
			jButton.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					if (scanner.isBusy() == false) {
						selectDevice();
					}

				}
			});
		}
		return jButton;
	}

	/**
	 * Esse metodo inicializa o jButton1
	 */
	private JButton getJButton1() {
		if (jButton1 == null) {
			jButton1 = new JButton();
			jButton1.setBounds(new Rectangle(160, 16, 131, 42));
			jButton1.setText("Scan");
			jButton1.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {

					getScan();

				}
			});
		}
		return jButton1;
	}

	/* Selecionando o device */
	public void selectDevice() {

		try {
			scanner.select();
		} catch (ScannerIOException e1) {
			IJ.error(e1.toString());
		}

	}

	/* Scaneando */
	public void getScan() {

		try {
			scanner.acquire();
		} catch (ScannerIOException e1) {
			IJ.showMessage("Access denied! \nTwain dialog maybe already opened!");
			// e1.printStackTrace();

		}

	}

	public void update(ScannerIOMetadata.Type type, ScannerIOMetadata metadata) {

		Calendar tempo = Calendar.getInstance();
		int segundo = tempo.get(Calendar.SECOND);
		
		
		if (type.equals(ScannerIOMetadata.ACQUIRED)) {
			int QtdImagens = 4;
			for (int i = 1; i < QtdImagens; i++) {
				ImagePlus imp = new ImagePlus("Scan", metadata.getImage());
				imp.show();
				/* inicio alteração teste */
				File arquivo = new File("C:/Temp/scan" + segundo + ".tif");
				FileSaver salvador = new FileSaver(imp);
				salvador.saveAsTiff(arquivo.getAbsolutePath());
			}
			
			//			File arquivo = new File("C:/Temp/scan.tif");
//			FileSaver salvador = new FileSaver(imp);
//			salvador.saveAsTiff(arquivo.getAbsolutePath());
			/* fim alteração teste */
			metadata.setImage(null);
			try {
				new uk.co.mmscomputing.concurrent.Semaphore(0, true).tryAcquire(2000, null);
			} catch (InterruptedException e) {
				IJ.error(e.getMessage());
				// e.printStackTrace();
			}

		} else if (type.equals(ScannerIOMetadata.NEGOTIATE)) {
			ScannerDevice device = metadata.getDevice();
			try {
				device.setResolution(100);
			} catch (ScannerIOException e) {
				IJ.error(e.getMessage());
			}
			/*
			 * More options if necessary! try{
			 * device.setShowUserInterface(true);
			 * device.setShowProgressBar(true);
			 * device.setRegionOfInterest(0,0,210.0,300.0);
			 * device.setResolution(100); }catch(Exception e){
			 * e.printStackTrace(); }
			 */
		} else if (type.equals(ScannerIOMetadata.STATECHANGE)) {

			// IJ.error(metadata.getStateStr());
		} else if (type.equals(ScannerIOMetadata.EXCEPTION)) {
			IJ.error(metadata.getException().toString());

		}

	}

} // @jve:decl-index=0:visual-constraint="95,130"