sample.java

基于JAVA开发的 OCR 神经网络源程序

import javax.swing.*;
import java.awt.*;

/**
 * Java Neural Network Example
 * Handwriting Recognition
 * by Jeff Heaton (http://www.jeffheaton.com) 1-2002
 * -------------------------------------------------
 * This component will display a downsampled image. 
 * Downsampleing is the process of taking a hi-res
 * image to a much lower resolution.
 * 
 * @author Jeff Heaton (http://www.jeffheaton.com)
 * @version 1.0
 */

public class Sample extends JPanel {

  /**
   * The image data.
   */
  SampleData data;

  /**
   * The constructor.
   * 
   * @param width The width of the downsampled image
   * @param height The height of the downsampled image
   */
  Sample(int width,int height)
  {
    data = new SampleData(' ',width,height);
  }

  /**
   * The image data object.
   * 
   * @return The image data object.
   */
  SampleData getData()
  {
    return data;
  }
  /**
   * Assign a new image data object.
   * 
   * @param data The image data object.
   */

  void setData(SampleData data)
  {
    this.data = data;
  }


  /**
   * @param g Display the downsampled image.
   */
  public void paint(Graphics g)
  {
    if ( data==null )
      return;

    int x,y;
    int vcell = getHeight()/data.getHeight();
    int hcell = getWidth()/data.getWidth();

    g.setColor(Color.white);
    g.fillRect(0,0,getWidth(),getHeight());

    g.setColor(Color.black);
    for ( y=0;y<data.getHeight();y++ )
      g.drawLine(0,y*vcell,getWidth(),y*vcell);
    for ( x=0;x<data.getWidth();x++ )
      g.drawLine(x*hcell,0,x*hcell,getHeight());

    for ( y=0;y<data.getHeight();y++ ) {
      for ( x=0;x<data.getWidth();x++ ) {
        if ( data.getData(x,y) )
          g.fillRect(x*hcell,y*vcell,hcell,vcell);
      }
    }

    g.setColor(Color.black);
    g.drawRect(0,0,getWidth()-1,getHeight()-1);

  }


}