source: trunk/gli/src/org/greenstone/gatherer/feedback/Separating.java@ 9078

package org.greenstone.gatherer.feedback;

import java.io.*;
import javax.imageio.*;
import java.awt.*;
import java.awt.image.*;
import com.sun.image.codec.jpeg.*;
import javax.swing.*;

/**
 * This method will separate 1 image file into 2 image  with the help of
 * another file and sace the difference into a jpeg files.
 * For example : We have 1 image file which is a screen shot and another image file
 *               is the screenshot with some line in it.
 *               This class will separate the screen shot and the line into 2 separates 
 *               images.And then it will save the line into a jpeg files.
 * 
 * @author Veronica Liesaputra
 */
public class Separating
{
    /**
     * This is the BufferedImage of image inside the reference image file.
     */
    private BufferedImage bi;
    /**
     * This is the BufferedImage of image that we want to separate into
     * 2 different image using the reference file.
     */
    private BufferedImage src_bi;

    /**
     * It will read whats inside the 2 given filenames and put it in the
     * right BufferedImage.
     * @param filename1 this is the file name of the reference image file.
     * @param filename2 this is the file name of the file we want to separate into 2.
     */
    public Separating(String filename1,String filename2)
    {
    try
        {
        File f1 = new File(filename1);
        File f2 = new File(filename2);
        bi = ImageIO.read(f1);
        src_bi = ImageIO.read(f2);
        }
    catch(IOException exp) {}
    }

    /**
     * This method will get the difference that exist between bi and src_bi and
     * will save the difference inside a jpeg file with the specified file name.
     * @param file1 is the name of the file where we want to save the image.
     */
    public void separate(String file1)
    {
    BufferedImage bi1;
    
    int width = bi.getWidth();
    int height = bi.getHeight();
    
    bi1 = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);

    for (int y = 0 ; y < height ; y++) 
        {
        for (int x = 0 ; x < width ; x++)
            {
            int rgb = bi.getRGB(x,y);
            int src_rgb = src_bi.getRGB(x,y);
            
            if (src_rgb != rgb)
                {
                bi1.setRGB(x,y,rgb);
                }
            }
        }

    save(bi1,file1);
    }

    /**
     * This method will save a BufferedImage to a jpeg file with the specified filename.
     * @param b is the BufferedImage to be saved.
     * @param filename is the name of the jpeg file.
     */
    public void save(BufferedImage b,String filename)
    {
    try 
        {
        File file = new File(filename);
        FileOutputStream out = new FileOutputStream(file);
        
        JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
        JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(b);
        param.setQuality(1.0f, false);
        encoder.setJPEGEncodeParam(param);
        encoder.encode(b);
        
        } catch (Exception ex) {}
    }
}