private void btnNegative_Click(object sender, EventArgs e)
        {
            Negative negative = new Negative();

            initSourceMap();
            negative.setImage(_imageTemp);
            actions(negative, "Negative");
        }
        private void btnNegative_Click(object sender, EventArgs e)
        {
            Negative negative = new Negative();

            negative.setImage(new Bitmap(pictureBox1.Image));
            negative.process();
            pictureBox1.Image = negative.getImage();
        }