Thumbimage

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
public class PictureProcessor {

/** The picture associated with this processor. */

private ImageIcon myPic;



/** The target image for the doFindTarget method. */

private ImageIcon targetPic;

public static final int VERTICAL = 0;
public static final int HORIZONTAL = 1;
public static final String IMAGE_JPEG = "jpeg";
public static final String IMAGE_JPG = "jpg";
public static final String IMAGE_PNG = "png";

/**

* Constructs a picture processor that manipulates a default image.

*/

public PictureProcessor() {

URL imgURL = getClass().getResource("image.jpg");

System.out.println("imgURL-->"+imgURL);
myPic = new ImageIcon(imgURL);
//myPic = new Picture(imgURL);

URL targetURL = getClass().getResource("/image.gif");
System.out.println("targetURL-->"+targetURL);

//targetPic = new Picture(targetURL);
getThumbnail(100, PictureProcessor.HORIZONTAL);

saveThumbnail(new File("thumb.jpg"), PictureProcessor.IMAGE_JPEG);
// The picUtil package seems to have a bug in

// handling the alpha channel. This is a kludge

// to fix things up... The picUtil package appears

// to take pixels that should be transparent and

// makes them pure white instead (with alpha==255,

// too). So, I'm going to take any pure white pixel

// in the target, and set the alpha to be 0.

//for (int i=0; i//
//for (int j=0; j//
//Pixel thePixel = targetPic.getPixel(j,i);
//
//PixelColour c = thePixel.getColour();
//
//if ((c.getRed()==255) && (c.getGreen()==255) &&
//
//(c.getBlue()==255)) c.setAlpha(0);
//
//thePixel.setColour(c);

//}

//}

}

public Image getThumbnail(int size, int dir)
{
if (dir == HORIZONTAL)
{
targetPic = new ImageIcon(
myPic.getImage().getScaledInstance(
size, -1, Image.SCALE_SMOOTH)
);
}
else
{
targetPic = new ImageIcon(
myPic.getImage().getScaledInstance(
-1, size, Image.SCALE_SMOOTH)
);
}
return targetPic.getImage();
}

//AND LATER THE PART THAT I AM HAVING TROUBLE WITH:


/**

* Computes a score of how well targetPic matches up

* with myPic, if the top-left corner of targetPic

* is positioned at row i and column j of myPic.

*

* Lower scores indicate a better match.

*

* The score is the weighted average (weighted by

* the alpha value in targetPic) of the distance

* between the two colours, squared. The squaring

* penalizes larger differences more heavily than

* simply adding up the differences.

*

* @param i The row to position the top-left corner

* of myPic; can be negative.

* @param j The column to position the top-let corner

* of myPic; can be negative.

* @return The score of how well the target matches at

* that position; lower is better.

*/

public void saveThumbnail(File file, String imageType)
{
if (targetPic != null)
{
BufferedImage bi = new BufferedImage(
targetPic.getIconWidth(),
targetPic.getIconHeight(),
BufferedImage.TYPE_INT_RGB
);
Graphics g = bi.getGraphics();
g.drawImage(targetPic.getImage(), 0, 0, null);
try
{
ImageIO.write(bi, imageType, file);
}
catch (IOException ioe)
{
System.out.println("Error occured saving thumbnail");
}
}
else
{
System.out.println("Thumbnail has not yet been created");
}
}
private double computeMatch(int i, int j) {

double score = 0.0;



int weightTotal = 0;

//for (int di=0; di//
//for (int dj=0; dj//
//if ((i+di>= 0) && (i+di < myPic.getImgHeight()) && (j+dj>= 0)
//
//&& (j+dj < myPic.getImgWidth())) {
//
//PixelColour imgColour = myPic.getPixel(j+dj, i+di).getColour();
//
//PixelColour targetColour = targetPic.getPixel(dj,di).getColour();

//int alpha = targetColour.getAlpha();
//
//
//
//int diff;
//
//int colourDistance=0;
//
//diff = imgColour.getRed()-targetColour.getRed();
//
//colourDistance += diff*diff;
//
//diff = imgColour.getGreen()-targetColour.getGreen();
//
//colourDistance += diff*diff;
//
//diff = imgColour.getBlue()-targetColour.getBlue();
//
//colourDistance += diff*diff;
//
//
//
//score += colourDistance*alpha;
//
//weightTotal += alpha;
//
//}
//
//}

///}



if (weightTotal==0) return 1.0/0.0; // Infinity

return score/weightTotal;



}

public static void main(String [] args)
{
PictureProcessor ct = new PictureProcessor();

}
}

-------------------------------------------------------------------


import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;

public class CreateThumbnail
{

public static final int VERTICAL = 0;
public static final int HORIZONTAL = 1;

public static final String IMAGE_JPEG = "jpeg";
public static final String IMAGE_JPG = "jpg";
public static final String IMAGE_PNG = "png";

private ImageIcon image;
private ImageIcon thumb;

public CreateThumbnail(Image image)
{
System.out.println("111111111");
this.image = new ImageIcon(image);
}

public CreateThumbnail(String fileName)
{
System.out.println("2222222222222");
image = new ImageIcon(fileName);
}

public Image getThumbnail(int size, int dir)
{
if (dir == HORIZONTAL)
{
thumb = new ImageIcon(
image.getImage().getScaledInstance(
size, -1, Image.SCALE_SMOOTH)
);
}
else
{
thumb = new ImageIcon(
image.getImage().getScaledInstance(
-1, size, Image.SCALE_SMOOTH)
);
}
return thumb.getImage();
}

public Image getThumbnail(int size, int dir, int scale)
{
if (dir == HORIZONTAL)
{
thumb = new ImageIcon(
image.getImage().getScaledInstance(size, -1, scale)
);
}
else
{
thumb = new ImageIcon(
image.getImage().getScaledInstance(-1, size, scale)
);
}
return thumb.getImage();
}

public void saveThumbnail(File file, String imageType)
{
if (thumb != null)
{
BufferedImage bi = new BufferedImage(
thumb.getIconWidth(),
thumb.getIconHeight(),
BufferedImage.TYPE_INT_RGB
);
Graphics g = bi.getGraphics();
g.drawImage(thumb.getImage(), 0, 0, null);
try
{
ImageIO.write(bi, imageType, file);
}
catch (IOException ioe)
{
System.out.println("Error occured saving thumbnail");
}
}
else
{
System.out.println("Thumbnail has not yet been created");
}
}

public static void main(String [] args)
{
CreateThumbnail ct = new CreateThumbnail("image.jpg");
ct.getThumbnail(100, CreateThumbnail.HORIZONTAL);
ct.saveThumbnail(new File("thumb.jpg"), CreateThumbnail.IMAGE_JPEG);
}

}