double wieksze(double x)
        {
            if (x > 255)
            {
                return 255;
            }
            else return x;
        }
        private void trackBar5_Scroll(object sender, EventArgs e)
        {

            textBox5.Text = Convert.ToString(trackBar5.Value);
            if (opened)
            {
                double wart = trackBar5.Value;
                if (wart > 0) { wart = wart / 10; }
                else{ wart = 0; }

                Bitmap set = (Bitmap)pictureBox1.Image;
                pictureBox2.Image = new Bitmap(pictureBox2.Image);
                double stretch_X = set.Width / (double)pictureBox1.Width;
                double stretch_Y = set.Height / (double)pictureBox1.Height;

                for (int i = 0; i < set.Height; i++)
                {
                    for (int j = 0; j < set.Width; j++)
                    {


                        Color piksel = myBitmap.GetPixel(j, i);

                        int r = Convert.ToInt16(piksel.R);
                        int g = Convert.ToInt16(piksel.G);
                        int b = Convert.ToInt16(piksel.B);

if(r<2) { r = 2; }
                        if (g < 2) { g = 2; }
                        if (b < 2) { b = 2; }

                        r = (int)(wieksze(Math.Pow(r, wart)));
                        g = (int)(wieksze(Math.Pow(g, wart)));
                        b = (int)(wieksze(Math.Pow(b, wart)));





                       ((Bitmap)pictureBox2.Image).SetPixel(j, i, System.Drawing.Color.FromArgb(r, g, b));
                    }
                }
            }
        }