Beispiel #1
0
        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;
        }