private void button2_Click(object sender, EventArgs e)
{
MemoryBitmap mbp = new MemoryBitmap(new Bitmap(pictureBox1.Image));
MemoryBitmap output = new MemoryBitmap(new Bitmap(pictureBox1.Image));
int[] xModel = new int[] { 1, 1, 1, 0, 0, 0, -1, -1, -1 };
int[] yModel = new int[] { -1, 0, 1, -1, 0, 1, -1, 0, 1 };
mbp.Gray();
for (int i = 0; i < mbp.Height; i++)
{
for (int j = 0; j < mbp.Width; j++)
{
int index = 0;
int Gx = 0, Gy = 0;
for (int m = -1; m < 2; m++)
{
for (int n = -1; n < 2; n++)
{
int vx = j + n >= mbp.Width ? j * 2 - mbp.Width : j + n;
int vy = i + m >= mbp.Height ? i * 2 - mbp.Height : i + m;
if (vx < 0)
{
vx *= -1;
}
if (vy < 0)
{
vy *= -1;
}
int val = mbp.GetPixel(vx, vy).R;
Gx += val * xModel[index];
Gy += val * yModel[index];
index++;
}
}
Gx = Math.Abs(Gx);
Gy = Math.Abs(Gy);
int p = Math.Max(Gx, Gy);
output.SetPixel(j, i, p, p, p);
}
}
output.SaveMemory();
pictureBox2.Image = output.bmp;
}