public bool equaling(xyPosition t)
{
if (this.head == t)
{
return(true);
}
else
{
return(false);
}
}
//this method implements step 4 of the algorithm
private void createLinkedList(xyPosition item)
{
item.setH(item);
linklistcount++;
LinkedList <xyPosition> temp = new LinkedList <xyPosition>();
temp.AddFirst(item);
holderArray.Add(temp);
labelHolder[item.X, item.Y] = linklistcount;
relevence.Add(linklistcount - 1);
}
private void step3(int j, int i)
{
int count = 0;
labelHolder[j, i] = labelHolder[j, i - 1];
int target = labelHolder[j, i - 1] - 1;
foreach (LinkedList <xyPosition> ll in holderArray)
{
if (count == target)
{
xyPosition xyclass = new xyPosition(j, i);
ll.AddLast(xyclass);
break;
}
count++;
}
}
private void step2(int j, int i)
{
int num1 = labelHolder[j, i - 1];
int num2 = labelHolder[j - 1, i];
int count = 0;
labelHolder[j, i] = Math.Min(num1, num2);
int target = Math.Min(num1, num2) - 1;
int notTarget = Math.Max(num1, num2) - 1;
relevence[notTarget] = target;
foreach (LinkedList <xyPosition> ll in holderArray)
{
if (count == target)
{
xyPosition xyclass = new xyPosition(j, i);
ll.AddLast(xyclass);
break;
}
count++;
}
}
public void setH(xyPosition z)
{
head = z;
}
private void button2_Click(object sender, EventArgs e)
{
Bitmap temp = new Bitmap(picture);
labelHolder = new int[temp.Width, temp.Height];
Console.WriteLine(labelHolder.GetLength(0) + " " + labelHolder.GetLength(1));
Color bl = Color.FromArgb(255, 0, 0, 0);
for (int i = 0; i < temp.Height; i++)
{
for (int j = 0; j < temp.Width; j++)
{
Color pixelColor = temp.GetPixel(j, i);
if (i == 0 && j == 0)
{
if (pixelColor != bl)
{
xyPosition item = new xyPosition(j, i);
createLinkedList(item);
}
}
else if (i == 0 && j != 0)
{
if (pixelColor != bl)
{
if (pixelColor == temp.GetPixel(j - 1, i))
{
step1(j, i);
}
if (pixelColor != temp.GetPixel(j - 1, i))
{
xyPosition xyclass = new xyPosition(j, i);
createLinkedList(xyclass);
}
}
}
else if (j == 0 && i != 0)
{
if (pixelColor != bl)
{
if (pixelColor == temp.GetPixel(j, i - 1))
{
step3(j, i);
}
if (pixelColor != temp.GetPixel(j, i - 1))
{
xyPosition xyclass = new xyPosition(j, i);
createLinkedList(xyclass);
}
}
}
else
{
if (pixelColor != bl)
{
if (pixelColor == temp.GetPixel(j - 1, i))
{
step1(j, i);
}
if (pixelColor == temp.GetPixel(j - 1, i) && pixelColor == temp.GetPixel(j, i - 1) && labelHolder[j, i - 1] != labelHolder[j - 1, i])
{
// Console.WriteLine(temp.GetPixel(j - 1, i) + " " + temp.GetPixel(j, i - 1) + " " + labelHolder[j, i - 1] + " " + labelHolder[j - 1, i]);
step2(j, i);
}
if (pixelColor != temp.GetPixel(j - 1, i) && pixelColor == temp.GetPixel(j, i - 1))
{
step3(j, i);
}
if (pixelColor != temp.GetPixel(j - 1, i) && pixelColor != temp.GetPixel(j, i - 1))
{
xyPosition xyclass = new xyPosition(j, i);
createLinkedList(xyclass);
}
}
}
}
}
for (int i = relevence.Count - 1; i > 0; i--)
{
if ((int)(relevence[i]) != i)
{
LinkedList <xyPosition> first = (LinkedList <xyPosition>)(holderArray[(int)(relevence[i])]);
LinkedList <xyPosition> second = (LinkedList <xyPosition>)(holderArray[i]);
foreach (xyPosition p in second)
{
first.AddLast(p);
}
holderArray[(int)(relevence[i])] = first;
holderArray.RemoveAt(i);
}
}
//This code implements coloring the identified shapes. In the current implementation it does seven different colors.
//This code is not necessary for the algorithm just presentation
//If more shapes need to be colored this code should be changed.
Color[] colorArray = { Color.Red, Color.Blue, Color.Green, Color.Yellow, Color.Magenta, Color.Cyan, Color.White };
int count = 0;
foreach (LinkedList <xyPosition> ll in holderArray)
{
Color randomColor = colorArray[count];
foreach (xyPosition p in ll)
{
temp.SetPixel(p.X, p.Y, randomColor);
}
count++;
}
//Use this code if need more than 7 shapes
/*
* foreach (LinkedList<xyPosition> ll in holderArray)
* {
* Random randomGen = new Random();
* KnownColor[] names = (KnownColor[])Enum.GetValues(typeof(KnownColor));
* KnownColor randomColorName = names[randomGen.Next(names.Length)];
* Color ranCol = Color.FromKnownColor(randomColorName);
* foreach (xyPosition p in ll)
* {
* temp.SetPixel(p.X, p.Y, ranCol);
* }
* }
*/
pictureBox1.Image = null;
label2.Text = holderArray.Count.ToString();
pictureBox1.Image = temp;
// Console.WriteLine("WE DONE");
}