1: /// <summary>

   2: /// adds noise to the image

   3: /// </summary>

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

   5: /// <param name="Amount">Amount of noise to add</param>

   6: /// <returns>A bitmap image</returns>

   7: public static Bitmap AddNoise(Bitmap OriginalImage, int Amount)

   8: {

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

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

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

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

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

  14:     Random.Random TempRandom = new Random.Random();

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

  16:     {

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

  18:         {

  19:             Color CurrentPixel = Image.GetPixel(OldData, x, y, OldPixelSize);

  20:             int R = CurrentPixel.R + TempRandom.Next(-Amount, Amount + 1);

  21:             int G = CurrentPixel.G + TempRandom.Next(-Amount, Amount + 1);

  22:             int B = CurrentPixel.B + TempRandom.Next(-Amount, Amount + 1);

  23:             R = R > 255 ? 255 : R;

  24:             R = R < 0 ? 0 : R;

  25:             G = G > 255 ? 255 : G;

  26:             G = G < 0 ? 0 : G;

  27:             B = B > 255 ? 255 : B;

  28:             B = B < 0 ? 0 : B;

  29:             Color TempValue = Color.FromArgb(R, G, B);

  30:             Image.SetPixel(NewData, x, y, TempValue, NewPixelSize);

  31:         }

  32:     }

  33:     Image.UnlockImage(NewBitmap, NewData);

  34:     Image.UnlockImage(OriginalImage, OldData);

  35:     return NewBitmap;

  36: }