1: /// <summary>

   2: /// Does dilation

   3: /// </summary>

   4: /// <param name="OriginalImage">Image to manipulate</param>

   5: /// <param name="Size">Size of the aperture</param>

   6: public static Bitmap Dilate(Bitmap OriginalImage, int Size)

   7: {

   8:     Bitmap NewBitmap = new Bitmap(OriginalImage.Width, OriginalImage.Height);

   9:     BitmapData NewData = Image.LockImage(NewBitmap);

  10:     BitmapData OldData = Image.LockImage(OriginalImage);

  11:     int NewPixelSize = Image.GetPixelSize(NewData);

  12:     int OldPixelSize = Image.GetPixelSize(OldData);

  13:     int ApetureMin = -(Size / 2);

  14:     int ApetureMax = (Size / 2);

  15:     for (int x = 0; x < NewBitmap.Width; ++x)

  16:     {

  17:         for (int y = 0; y < NewBitmap.Height; ++y)

  18:         {

  19:             int RValue = 0;

  20:             int GValue = 0;

  21:             int BValue = 0;

  22:             for (int x2 = ApetureMin; x2 < ApetureMax; ++x2)

  23:             {

  24:                 int TempX = x + x2;

  25:                 if (TempX >= 0 && TempX < NewBitmap.Width)

  26:                 {

  27:                     for (int y2 = ApetureMin; y2 < ApetureMax; ++y2)

  28:                     {

  29:                         int TempY = y + y2;

  30:                         if (TempY >= 0 && TempY < NewBitmap.Height)

  31:                         {

  32:                             Color TempColor = Image.GetPixel(OldData, TempX, TempY, OldPixelSize);

  33:                             if (TempColor.R > RValue)

  34:                                 RValue = TempColor.R;

  35:                             if (TempColor.G > GValue)

  36:                                 GValue = TempColor.G;

  37:                             if (TempColor.B > BValue)

  38:                                 BValue = TempColor.B;

  39:                         }

  40:                     }

  41:                 }

  42:             }

  43:             Color TempPixel = Color.FromArgb(RValue, GValue, BValue);

  44:             Image.SetPixel(NewData, x, y, TempPixel, NewPixelSize);

  45:         }

  46:     }

  47:     Image.UnlockImage(NewBitmap, NewData);

  48:     Image.UnlockImage(OriginalImage, OldData);

  49:     return NewBitmap;

  50: }