Skin Detection Algorithm - Implementation in Java

Hi GuyZ,,,
          This is one of the partial solution of my Mini Project. This is an implementation of skin detection algorithm in Java. The algorithm implemented can be found in http://kilyos.ee.bilkent.edu.tr/~signal/defevent/papers/cr1214.pdf, https://arxiv.org/ftp/arxiv/papers/1008/1008.4206.pdf
          Three algorithms implemented in this code are,

• RGB skin cluster
• YCbCr skin cluster
• HSV skin cluster

Original Image

After Process

Original

After Process

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Source Code

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GraphicsEnvironment;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

/**
 *
 * @author Ajith Kp [fb.com/ajithkp560]
 * (c) _TERMINAL_CODERS_ (c) http://www.terminalcoders.blogspot.com
 */
public class SkinDetection extends JFrame{
    JButton openB = new JButton("Open");
    JPanel imagePanel = new JPanel();
    JPanel menuPanel = new JPanel();
    SkinDetection(){
        super("Skin Detection Application");
        GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        setMaximizedBounds(env.getMaximumWindowBounds());
        setExtendedState(getExtendedState() | MAXIMIZED_BOTH);
        openB.addActionListener(new ActionListener(){
            @Override
            public void actionPerformed(ActionEvent e) {
                JFileChooser fc = new JFileChooser();
                int returnVal = fc.showOpenDialog(SkinDetection.this);
                if (returnVal == JFileChooser.APPROVE_OPTION) {
                    try {
                        File imgf = fc.getSelectedFile();
                        imagePanel.removeAll();
                        setPic(imgf);
                    } catch (IOException ex) {
                    }
                }
            }
        });
        menuPanel.add(openB);
        add(menuPanel, BorderLayout.NORTH);
        add(imagePanel, BorderLayout.CENTER);
    }
    int max(int r, int g, int b){
        if(r>g && r>b)
            return r;
        if(g>r && g>b)
            return g;
        return b;
    }
    int min(int r, int g, int b){
        if(r<g && r<b)
            return r;
        if(g<r && g<b)
            return g;
        return b;
    }
    boolean isSkin(int r, int g, int b){
        if(r>95 && g>40 && b>20){
            if((max(r,g,b)-min(r,g,b))>15){
                if(Math.abs(r-g)>15 && r>g && r>b){
                    return true;
                }
            }
        }
        return false;
    }
    boolean YCbCr(int r, int g, int b){
        double Y = (0.257*r)+(0.504*g)+(0.098*b)+16; 
        double Cb = -(0.148*r)-(0.291*g)+(0.439*b)+128;
        double Cr = (0.439*r) - (0.368*g) - (0.071*b) + 128;
        
        if (Y > 80 && (Cb>85 && Cb<135) && (Cr>135 && Cr < 180))
            return true;
        return false;
    }
    boolean HSI(int r, int g, int b){
        int mx = max(r,g,b);
        int mn = min(r,g,b);
        double d = mx-mn;
        double h = 0;
        if(mx==r)
            h = (g-b)/d;
        else if(mx==g)
            h = 2+(b-r)/d;
        else
            h = 4+(r-g)/d;
        h = h*60;
        if(h<0)
            h+=360;
        if(h>4 && h<45)
            return true;
        return false;
    }
    public void setPic(File imgf) throws IOException
    {
        BufferedImage myImg = ImageIO.read(imgf);
        int w = myImg.getWidth();
        int h = myImg.getHeight();
        
        int r, g, b;
        for(int i=0;i<w;i++)
        {
            for(int j=0;j<h;j++)
            {
                Color c = new Color(myImg.getRGB(i, j));
                r=c.getRed();
                g=c.getGreen();
                b=c.getBlue();
                if(isSkin(r,g,b) && YCbCr(r,g,b) && HSI(r,g,b)){
                    //The skin detected
                }
                else{
                    myImg.setRGB(i, j, new Color(0, 0, 0, 0).getRGB());
                    //Set black color if not a skin part
                }
            }
        }
        JLabel picLabel = new JLabel(new ImageIcon(myImg));
        imagePanel.add(picLabel);
        imagePanel.revalidate();
        imagePanel.repaint();
    }
    public static void main(String[] args) {
        SkinDetection frm=new SkinDetection();
        frm.setSize(700, 500);
        frm.setVisible(true);
        frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}