【简单的CV】1.7 图像二值化

        public static Bitmap Matboolcal( Bitmap bitmap,int thr1,int thr2)
        {
            points.Clear();
            Bitmap bitmap_dst = new Bitmap(bitmap.Width, bitmap.Height);
            if (true)
            {
                for (int hl = 0; hl < bitmap.Height; hl++)//遍历所有列
                {
                    for (int wl = 0; wl < bitmap.Width;wl++)//遍历所有列
                    {
                        if (bitmap.GetPixel(wl, hl).R <thr1)
                        {
                            bitmap_dst.SetPixel(wl, hl, Color.FromArgb(0, 0, 0));
                            Point point = new Point(); point.X = wl; point.Y = hl;
                            points.Add(point);//记录这些点
                        }
                        else
                        {
                            bitmap_dst.SetPixel(wl, hl, Color.FromArgb(255,255,255));
                        }
                    }
                }
            }
            return bitmap_dst;
        }

        private void matFindCounterToolStripMenuItem_Click(object sender, EventArgs e)
        {
            foreach (PointF item in ESCV.points)
            {
                scbitmap.SetPixel((int)item.X, (int)item.Y, Color.Red);
            }
            pictureBox1.Image = scbitmap;
        }