Notes

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using AForge.Imaging.Filters;

namespace WindowsFormsApp1
{
public partial class Form1 : Form
{

Bitmap originalImage;

public Form1()
{
InitializeComponent();
}

private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog openDialog = new OpenFileDialog();

// openDialog.ShowDialog();

if(openDialog.ShowDialog() == DialogResult.OK)
{
// image is created in Bitmap format
originalImage = new Bitmap(openDialog.FileName);

pictureBox1.Image = originalImage;

}

}

private void button2_Click(object sender, EventArgs e)
{
Bitmap img = Grayscale.CommonAlgorithms.BT709.Apply(originalImage);
pictureBox2.Image = img;
}

private void button1_Click(object sender, EventArgs e)
{
Bitmap grayImage = Grayscale.CommonAlgorithms.BT709.Apply(originalImage);

Threshold bwObject = new Threshold(100);
Bitmap bwImage = bwObject.Apply(grayImage);
pictureBox2.Image = bwImage;

// Another way of making the picture black and white
// create filter
//Threshold filter = new Threshold(100);
// apply the filter
//filter.ApplyInPlace(grayImage);
//pictureBox2.Image = grayImage;
}

private void button3_Click(object sender, EventArgs e)
{
Bitmap grayImage = Grayscale.CommonAlgorithms.BT709.Apply(originalImage);

HomogenityEdgeDetector filter = new HomogenityEdgeDetector();
// apply the filter
filter.ApplyInPlace(grayImage);
pictureBox2.Image = grayImage;
}

// Function to check is the pixel is skin or not
bool isSkin(Color c)
{
// Algorith to detect the skin color. Range is given in the algorithm in the paper
return (c.R > 95 && c.G > 40 && c.B > 20) &&
(Math.Max(c.R, Math.Max(c.G, c.B)) -
(Math.Min(c.R, Math.Min(c.G, c.B))) > 25 &&
(Math.Abs(c.R - c.G) > 15 && c.R > c.G && c.R > c.B));
}

// Getting the skin of the image
private void button4_Click(object sender, EventArgs e)
{
//preserving original image
Bitmap copiedImage = (Bitmap)originalImage.Clone();
for (int x = 0; x < copiedImage.Width; x++)
{
for (int y = 0; y < copiedImage.Height; y++)
{
if(!isSkin(copiedImage.GetPixel(x,y)))
{
copiedImage.SetPixel(x, y, Color.Black);
}

}
}

copiedImage = Grayscale.CommonAlgorithms.BT709.Apply(copiedImage);
Threshold beObj = new Threshold(50);

copiedImage = beObj.Apply(copiedImage);

// Apply Closing morphological operation on the skin image
Closing cl = new Closing();
Bitmap otherImage = cl.Apply(copiedImage);

// show on the pictureBox2
pictureBox2.Image = otherImage;


// Getting the pixel value at (10,15) coordinates
//Color c = originalImage.GetPixel(10, 15);
//c.R;
//c.G;
//c.B;
}
}
}