sampledata.java

基于JAVA开发的 OCR 神经网络源程序

/**
 * Java Neural Network Example
 * Handwriting Recognition
 * by Jeff Heaton (http://www.jeffheaton.com) 1-2002
 * -------------------------------------------------
 * A class that is used to store a downsampled character.
 * 
 * @author Jeff Heaton (http://www.jeffheaton.com)
 * @version 1.0
 */

public class SampleData implements Comparable,Cloneable {

/**
 * The downsampled data as a grid of booleans.
 */
  protected boolean grid[][];

/**
 * The letter.
 */
  protected char letter;

/**
 * The constructor
 * 
 * @param letter What letter this is
 * @param width The width
 * @param height The height
 */
  public SampleData(char letter,int width,int height)
  {
    grid = new boolean[width][height];
    this.letter = letter;
  }

/**
 * Set one pixel of sample data.
 * 
 * @param x The x coordinate
 * @param y The y coordinate
 * @param v The value to set
 */
  public void setData(int x,int y,boolean v)
  {
    grid[x][y]=v;
  }

/**
 * Get a pixel from the sample.
 * 
 * @param x The x coordinate
 * @param y The y coordinate
 * @return The requested pixel
 */
  public boolean getData(int x,int y)
  {
    return grid[x][y];
  }

/**
 * Clear the downsampled image
 */
  public void clear()
  {
    for ( int x=0;x<grid.length;x++ )
      for ( int y=0;y<grid[0].length;y++ )
        grid[x][y]=false;
  }

/**
 * Get the height of the down sampled image.
 * 
 * @return The height of the downsampled image.
 */
  public int getHeight()
  {
    return grid[0].length;
  }

/**
 * Get the width of the downsampled image.
 * 
 * @return The width of the downsampled image
 */
  public int getWidth()
  {
    return grid.length;
  }

/**
 * Get the letter that this sample represents.
 * 
 * @return The letter that this sample represents.
 */
  public char getLetter()
  {
    return letter;
  }

/**
 * Set the letter that this sample represents.
 * 
 * @param letter The letter that this sample represents.
 */
  public void setLetter(char letter)
  {
    this.letter = letter;
  }
/**
 * Compare this sample to another, used for sorting.
 * 
 * @param o The object being compared against.
 * @return Same as String.compareTo
 */

  public int compareTo(Object o)
  {
    SampleData obj = (SampleData)o;
    if ( this.getLetter()>obj.getLetter() )
      return 1;
    else
      return -1;
  }

/**
 * Convert this sample to a string.
 * 
 * @return Just returns the letter that this sample is assigned to.
 */
  public String toString()
  {
    return ""+letter;
  }


/**
 * Create a copy of this sample
 * 
 * @return A copy of this sample
 */
  public Object clone()

  {

    SampleData obj = new SampleData(letter,getWidth(),getHeight());
    for ( int y=0;y<getHeight();y++ )
      for ( int x=0;x<getWidth();x++ )
        obj.setData(x,y,getData(x,y));
    return obj;    
  }

}