I am trying to implement the Kuwahara Filter in C#. I think my code is right, but I am not getting an exact output. Can someone help me with where I am going wrong?

```
unsafe
{
try
{
Bitmap b1 = (Bitmap)pictureBox1.Image.Clone();
Bitmap b2 = new Bitmap(b1.Width, b1.Height);
BitmapData bd1 = b1.LockBits(new Rectangle(0, 0, b1.Width, b1.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
BitmapData bd2 = b2.LockBits(new Rectangle(0, 0, b2.Width, b2.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
byte* p1 = (byte*)(void*)bd1.Scan0.ToPointer();
byte* p2 = (byte*)(void*)bd2.Scan0.ToPointer();
//Graphics g = Graphics.FromImage(b2);
//g.DrawImage(b1, new Rectangle(0, 0, b1.Width, b1.Height), new Rectangle(0, 0, b1.Width, b1.Height), GraphicsUnit.Pixel);
//g.Dispose();
int[] aminx = { -(b1.Width * b1.Height) / 2, 0, -(b1.Width * b1.Height) / 2, 0 };
int[] amaxx = { 0, (b1.Width * b1.Height) / 2, 0, (b1.Width * b1.Height) / 2 };
int[] aminy = { -(b1.Width * b1.Height) / 2, -(b1.Width * b1.Height) / 2, 0, 0 };
int[] amaxy = { 0, 0, (b1.Width * b1.Height) / 2, (b1.Width * b1.Height) / 2 };
for (int x = 0; x < b2.Width; x++)
{
for (int y = 0; y < b2.Height; y++)
{
int[] RValues = { 0, 0, 0, 0 };
int[] GValues = { 0, 0, 0, 0 };
int[] BValues = { 0, 0, 0, 0 };
int[] NumPixels = { 0, 0, 0, 0 };
int[] MaxRValue = { 0, 0, 0, 0 };
int[] MaxGValue = { 0, 0, 0, 0 };
int[] MaxBValue = { 0, 0, 0, 0 };
int[] MinRValue = { 255, 255, 255, 255 };
int[] MinGValue = { 255, 255, 255, 255 };
int[] MinBValue = { 255, 255, 255, 255 };
for (int i = 0; i < 4; ++i)
{
for (int x2 = aminx[i]; x2 < amaxx[i]; ++x2)
{
int TempX = x + x2;
if (TempX >= 0 && TempX < b2.Width)
{
for (int y2 = aminy[i]; y2 < amaxy[i]; ++y2)
{
int TempY = y + y2;
if (TempY >= 0 && TempY < b2.Height)
{
//Color TempColor = b1.GetPixel(TempX, TempY);
RValues[i] += p1[2];// TempColor.R;
GValues[i] += p1[1];// TempColor.G;
BValues[i] += p1[0];// TempColor.B;
if (p1[2] > MaxRValue[i])
{
MaxRValue[i] = p1[2];// TempColor.R;
}
else if (p1[2] < MinRValue[i])
{
MinRValue[i] = p1[2];// TempColor.R;
}
if (p1[1] > MaxGValue[i])
{
MaxGValue[i] = p1[1];// TempColor.G;
}
else if (p1[1] < MinGValue[i])
{
MinGValue[i] = p1[1];// TempColor.G;
}
if (p1[0] > MaxBValue[i])
{
MaxBValue[i] = p1[0];// TempColor.B;
}
else if (p1[0] < MinBValue[i])
{
MinBValue[i] = p1[0];// TempColor.B;
}
++NumPixels[i];
}
p1 += 3;
}
}
}
}
int j = 0;
int mind = 10000;
for (int i = 0; i < 4; i++)
{
int cd = MaxRValue[i] - MinRValue[i] + MaxGValue[i] - MinGValue[i] + MaxBValue[i] - MinBValue[i];
if (cd < mind && NumPixels[i] > 0)
{
j = i;
mind = cd;
}
}
p2[0] = (byte)(BValues[j] / NumPixels[j]);
p2[1] = (byte)(GValues[j] / NumPixels[j]);
p2[2] = (byte)(RValues[j] / NumPixels[j]);
//Color meanpixel = Color.FromArgb(RValues[j] / NumPixels[j], GValues[j] / NumPixels[j], BValues[j] / NumPixels[j]);
//b2.SetPixel(x, y, meanpixel);
}
}
b2.Save(@"C:\users\pashok\tt.jpg");
int boo = 0;
b2.Save(@"C:\users\pashok\kuw.jpg");
b1.UnlockBits(bd1);
b2.UnlockBits(bd2);
textBox1.Text = "at the end";
//pictureBox2.Image = (Image)b2;
} catch(Exception ex)
{
}
}
```