EmguCV蛇功能答案

【问题标题】：EmguCV snake functionEmguCV蛇功能
【发布时间】：2019-11-13 18:52:05
【问题描述】：

我正在尝试使用 EmguCV 中的蛇形活动轮廓，但我什么都没拿。这是我的代码：

     Image<Gray, Byte> img = new Image<Gray, Byte>(300, 300, new Gray());

     Point center = new Point(100, 100);
     double width = 20;
     double height = 40;
     Rectangle rect = new Rectangle(center, new Size(20, 20));
     img.Draw(rect, new Gray(255.0), -1);

     using (MemStorage stor = new MemStorage())
     {
        Seq<Point> pts = new Seq<Point>((int)SEQ_TYPE.CV_SEQ_POLYGON, stor);
        pts.Push(new Point(20, 20));
        pts.Push(new Point(20, 280));
        pts.Push(new Point(280, 280));
        pts.Push(new Point(280, 20));

        //Image<Gray, Byte> canny = img.Canny(100.0, 40.0);
        Seq<Point> snake = img.Snake(pts, 0.1f, 0.5f, 0.4f, new Size(21, 21), new MCvTermCriteria(500, 0.1), stor);

        img.Draw(pts, new Gray(120), 1);
        img.Draw(snake, new Gray(80), 2);

我做错了什么？有什么想法吗？

【问题讨论】：

标签： c# emgucv

【解决方案1】：

你错过了绘制你的初始化点。

我已经为你和整个社区设置了一些代码，因为那里没有 emgu 蛇样本。

        private void TestSnake()
    {
        Image<Gray, Byte> grayImg = new Image<Gray, Byte>(400, 400, new Gray());
        Image<Bgr, Byte> img = new Image<Bgr, Byte>(400, 400, new Bgr(255,255,255));

        // draw an outer circle on gray image
        grayImg.Draw(new Ellipse(new PointF(200,200),new SizeF(100,100),0), new Gray(255.0), -1);
        // inner circle on gray image to create a donut shape :-)
        grayImg.Draw(new Ellipse(new PointF(200, 200), new SizeF(50, 50), 0), new Gray(0), -1);

        // this is the center point we'll use to initialize our contour points
        Point center = new Point(200, 200);
        // radius of polar points
        double radius = 70;

        using (MemStorage stor = new MemStorage())
        {

            Seq<Point> pts = new Seq<Point>((int)Emgu.CV.CvEnum.SEQ_TYPE.CV_SEQ_POLYGON, stor);                
            int numPoint = 100;
            for (int i = 0; i < numPoint; i++)
            {   // let's have some fun with polar coordinates                                
                Point pt = new Point((int)(center.X + (radius * Math.Cos(2 * Math.PI * i / numPoint))), (int)(center.Y + (radius * Math.Sin(2 * Math.PI * i / numPoint))) );
                pts.Push(pt);                                            
            }
            // draw contour points on result image
            img.Draw(pts, new Bgr(Color.Green), 2);
            // compute snakes                                
            Seq<Point> snake = grayImg.Snake(pts, 1.0f, 1.0f, 1.0f, new Size(21, 21), new MCvTermCriteria(100, 0.0002), stor);
            // draw snake result
            img.Draw(snake, new Bgr(Color.Yellow), 2);

            // use for display in a winform sample
            imageBox1.Image = grayImg;
            imageBox2.Image = img;
        }
    }

希望这会有所帮助，只需更改一些参数，您就会对结果感到惊讶。

【讨论】：