소프트웨어 개구리

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package univ.inu.embedded.imgeditor;

import java.awt.*;
import java.awt.image.*;
import java.io.*;

import javax.imageio.*;
import javax.swing.*;

public class ImageFrame extends JFrame {

	private int width = 0;
	private int height = 0;
	private BufferedImage img = null;
	private MyImgPanel imgPanel = null;
	
	private class MyImgPanel extends JComponent
	{
		
		public void paint(Graphics g)
		{
			Graphics2D g2 = (Graphics2D)g;
			g2.drawImage(img, 0, 0, null);
		}
	}
	
	private void loadImage(String fname)
	{
		try {
			img = ImageIO.read(new File(fname));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		WritableRaster wr = img.getRaster();
		
		int[] pixelValue = new int[3];
		
		for (int i = 0; i < img.getWidth(); i++)
		{
			for (int j = 0; j < img.getHeight(); j++)
			{
				wr.getPixel(i, j, pixelValue);
				int v = (pixelValue[0]+pixelValue[1]+pixelValue[2])/3;
				
				if (v > 127)
				{
					v = 255;
				}
				else
				{
					v = 0;
				}
				
				pixelValue[0] = v;
				pixelValue[1] = v;
				pixelValue[2] = v;
				wr.setPixel(i, j, pixelValue);
			}
		}

	}
	
	public ImageFrame ()
	{
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		loadImage("dog.jpg");
		width = img.getWidth();
		height = img.getHeight();
		
		imgPanel = new MyImgPanel();
		imgPanel.setSize(width, height);
		
		this.add(imgPanel);
		this.setSize(width+10, height+10);
		this.setVisible(true);
		
	}
	
	public static void main(String argv[])
	{
		new ImageFrame();
	}

}