Colorsync : sepia tone versus sepia image correction

Question

Hello,
When using Colorsync, you can change an image to *"sepia tone"* using a predefined profile. But there's also a "Sepia" slider when you click on the *"image correction"* button. However, they give a totally different result...
The first one gives a result that looks more or less like the ones being taken immediately from a camera with the sepia filter selected, while the second one (from the "image correction" slider) seems totally wrong. How come?
If I do the conversion to sepia in (e.g.) Picasa or Photoshop, they seem to look like the (correct?) "sepia tone"-version. But on the other side, (e.g.) Pixelmator and Seashore give the (wrong?) "image correction"-version...
Now, I'm interpreting them as "correct" and "wrong", but actually, I can't image that (e.g.) Pixelmator would do a "totally wrong" sepia conversion — so that brings me to this: *what's the difference between these two sepia-versions*?
I don't have enough knowledge about this, so I hope someone can help me out here...
-- Many thanks for you reply,
Franky Backeljauw

Answer 1

I tried using the algorithm, but it turned my image
purple rather than brow. :(The Delphi code has bug.
A simpler version does work:
import javax.swing.*;
import java.awt.*;
import java.awt.image.*;
public class Sepia{
  public static void main(String[] args){
    ImageIcon iic = new ImageIcon("Pic6.jpg");
    Image img = iic.getImage();
    ImageFilter filter = new SepiaFilter();
    img = Toolkit.getDefaultToolkit().createImage
     (new FilteredImageSource(img.getSource(), filter));
    iic.setImage(img);
    JLabel lab = new JLabel(iic);
    JOptionPane.showMessageDialog(null, lab);
    System.exit(0);
class SepiaFilter extends RGBImageFilter {
  int depth;
  public SepiaFilter(int d){
    if (d < 0){
      d = 0;
    depth = d;
    canFilterIndexColorModel = true;
  public SepiaFilter(){
    this(20);
  public int filterRGB(int x, int y, int rgb){
    int r, g, b, gry;
    Color c = new Color(rgb);
    r = c.getRed();
    g = c.getGreen();
    b = c.getBlue();
    gry = (r + g + b) / 3;
    r = g = b = gry;
    r = r + (depth * 2);
    g = g + depth;
    if (r > 255){
      r = 255;
    if (g > 255){
      g = 255;
    c = new Color(r, g, b);
    return c.getRGB();
}