grayscaleimage.java

JAVA 实现虹膜识别（完整）

package IrisRecog;

/**
 * GrayscaleImage.java
 * 
 * The class holds both the original image and a two-way integer array representation
 * of the grayscale of that image.
 *
 * @owner Michael Huffman
 * @author Team 6: A. Bare, I. Chaugule,M. Huffman, M. Pearson, C. Schell
 * @version 0.0.1
 *
 * 	CSC 480 Section 2
 * 	Fall 2005
 * 	10/8/05
 *
 * Edit History:
 *  10/8/05 - created
 *  10/9/05 - updated the intensity methods, documented and commented
 *	10/10/05 - added constructor to create grayscale image with width and height
 */
 
import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
import java.io.*;

public class GrayscaleImage implements Serializable
{
	/*
	 * Two dimensional array that holds the luminosity of each pixel in the image
	 */
	protected int [][] int_Arr_Pixels; 
	
	/*
	 * The grayscale buffered version of the image.
	 */
	protected BufferedImage bim_Grayscale; 
	 
	/**
	 * Empty constructor creates a grayscale image without any
	 * data but with a given size.
	 *
	 * @param w The width
	 * @param h The height
	 */
	public GrayscaleImage(int w, int h)
	{
		int_Arr_Pixels = new int[w][h];
		bim_Grayscale = null;
	}
	/**
	 * Constructor creates a grayscale image from the given image.
	 *
	 * @param i The image that is to be turned into a grayscale image
	 */
	public GrayscaleImage(Image i)
	{			
		//Convert the image to grayscale
		this.int_Arr_Pixels = Functions.convertToGrayscale(i);
		
		/* Create the buffered image grayscale representation */
		this.bim_Grayscale = new BufferedImage(i.getWidth(null), i.getHeight(null), BufferedImage.TYPE_BYTE_GRAY);
		
		Graphics g = bim_Grayscale.getGraphics();
				 g.drawImage(i, 0, 0, null);
				 g.dispose();
	}
	
	/**
	 * Returns the original image object.
	 *
	 * @return the original image
	 */
	public Image getImage()
	{
		return (Image)bim_Grayscale;
	}
	
	/**
	 * Returns the width of the image.
	 * 
	 * @return the width of the image
	 */
	public int getWidth()
	{
		return this.bim_Grayscale.getWidth(null);
	}
	
	/**
	 * Returns the height of the image.
	 * 
	 * @return the height of the image
	 */
	public int getHeight()
	{
		return this.bim_Grayscale.getHeight(null);
	}
	
	/**
	 * Returns the intensity at the specified cartesian location.
	 *
	 * @param x The x coordinate of the located to get the intensity of
	 * @param y The y coordinate of the located to get the intensity of
	 * @return the integer intensity value of the specified cartesian location
	 */
	public int getIntensity(int x, int y) 
	{		
		return this.int_Arr_Pixels[x][y];
	}
	
	/**
	 * Sets the intensity at the specified cartesian location to the given value.
	 *
	 * @param x The x coordinate of the located to get the intensity of
	 * @param y The y coordinate of the located to get the intensity of
	 * @param intensity The intensity to set
	 */
	public void setIntensity(int x, int y, int intensity) 
	{		
		this.int_Arr_Pixels[x][y] = intensity;
	}
	
	/**
	 * Returns the intensity at the specified cartesian point.
	 *
	 * @param p The point to get the intensity of
	 * @return the integer intensity value of the specified point
	 */
	public int getIntensity(Point p)
	{
		return this.int_Arr_Pixels[(int)p.getX()][(int)p.getY()];
	}
	
	/**
	 * Sets the intensity at the specified cartesian point to the given value.
	 *
	 * @param p The point to get the intensity of
	 * @param intensity The intensity to set
	 */
	public void setIntensity(Point p, int intensity)
	{
		this.int_Arr_Pixels[(int)p.getX()][(int)p.getY()] = intensity;
	}
	
	/**
	 * Returns the intensity at the specified polar location.
	 *
	 * @param center The origin of the polar coordinate syste,
	 * @param theta The angle of the polar coordinate
	 * @param r The radius of the polar coordinate
	 * @return the integer intensity value of the specified polar location
	 */
	public int getIntensity(Point center, double theta, double r)
	{
		Point pt_Cartesian = Functions.polarToCartesian(center, theta, r);
		
		return this.getIntensity(pt_Cartesian);
	}
}