Clip Image

[loftty]

Hi All,

Is it possible to get the points of a image? for example a ellipse has 13 points in a graphics path, now if I had a image that was a ellipse how could I get 13 points from the image?

is it possible?

Thanks

Loftty

[ComputerJy]

You can scan the image point-by-point and put all colored points (not white) in an array

But this only works for a special kind of images, where it only have one shape

[loftty]

Hi,

This is how far I got as I need to create a graphics path from a image

OpenFileDialog op = new OpenFileDialog();
            op.ShowDialog();

            Bitmap b = new Bitmap(op.FileName);
            Bitmap bat = new Bitmap(Im, pictureBox1.Width, pictureBox1.Height);
            Image d = bat;
            Graphics g = Graphics.FromImage(d);
            g.SmoothingMode = SmoothingMode.AntiAlias;

            List<Point> pnts = new List<Point>();
            List<RectangleF> Rects = new List<RectangleF>();
            GraphicsPath gp = new GraphicsPath();
            int h = 0;
            for (int i = 0; i < b.Width; i++)
            {

                for (int j = 0; j < b.Height; j++)
                {
                    if (b.GetPixel(i, j) != Color.FromArgb(255, 255, 255, 255))
                    {
                        if (j <= h+1)
                        {
                            pnts.Add(new Point(i, j));
                        }
                        h = j;
                    }
                    
                }
            }

            Point[] pts = new Point[pnts.Count];
            for (int i = 0; i < pnts.Count; i++)
            {
                pts[i] = pnts[i];
            }

            gp.AddLines(pts);
            gp.CloseFigure();
            Brush bdd = new SolidBrush(Color.Red);
            g.FillPath(bdd, gp);
            g.DrawPath(new Pen(Color.Black), gp);
            
            pictureBox1.Refresh();
            pictureBox1.Image = d;

Which is from the attached image, but for some reason it does not create the correct path.
Why is this?

Thanks

Loftty

[loftty]

Hi,

Is this possible to do then?

Thanks

Loftty