private void button1_Click(object sender, EventArgs e)
        {
            Color Result;
            int koef1,koef2;
            Task = new Bitmap(Original);
            int kof;
            for (int x = 0; x < Task.Width; x++)
            {
                for (int y = 0; y < Task.Height;  y++)
                {

                    if (x == 0)
                    {
                        if (y != Task.Height-1)
                        {
                            Result = Original.GetPixel(x + 1, y + 1);
                        }
                        else
                        {
                            Result = Original.GetPixel(x, y);
                        }
                        koef1 = (int)(0.299 * Result.R + 0.587 * Result.G + 0.114 * Result.B);
                        koef2 = koef1;

                    }
                    else
                    {
                        if(y==Task.Height-1)
                        {
                            Result = Original.GetPixel(x - 1, y - 1);
                            koef1 = (int)(0.299 * Result.R + 0.587 * Result.G + 0.114 * Result.B);
                            koef2 = koef1;
                        }
                        else
                        {
                            if (x == Task.Width-1)
                            {
                                if (y != 0) Result = Original.GetPixel(x - 1, y - 1);
                                else Result = Original.GetPixel(x, y);
                                koef1 = (int)(0.299 * Result.R + 0.587 * Result.G + 0.114 * Result.B);
                                koef2 = koef1;
                            }
                            else
                            {
                                if (y==0)
                                {
                                    Result = Original.GetPixel(x + 1, y + 1);
                                    koef1 = (int)(0.299 * Result.R + 0.587 * Result.G + 0.114 * Result.B);
                                    koef2 = koef1;
                                }
                                else
                                {
                                    Result = Original.GetPixel(x - 1, y - 1);
                                    koef1 = (int)(0.299 * Result.R + 0.587 * Result.G + 0.114 * Result.B);
                                    Result = Original.GetPixel(x + 1, y + 1);
                                    koef2 = (int)(0.299 * Result.R + 0.587 * Result.G + 0.114 * Result.B);
                                }
                            }
                        }
                    }
                    kof = (int)(32 + (0.5 * (-koef1 + koef2)));
                    if (kof < 0) kof = 0;
                    if (kof > 255) kof = 255;
                    Result = Color.FromArgb(kof, kof, kof);
                    Task.SetPixel(x, y, Result);
                }
            }
            gTask.DrawImage(Task, 0, 0);
        }