在EmguCV中围绕轮廓绘制最小围绕圆

Question

如何在EmguCV中围绕轮廓绘制最小的圆圈？ FindContours（）方法返回一组点。但要绘制圆圈，它要求获得pointf。有没有解决这个问题？感谢。

Answer 1

是的，有办法。您只需要将Contour转换为PointF数组，如下所示：

for (var contour = binaryImage.FindContours(CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE,
    RETR_TYPE.CV_RETR_CCOMP, mem);
    contour != null;
    contour = contour.HNext)
    {
        //assuming you have a way of getting the index of 
        //point you wanted to extract from the current contour
        var index = 0;
        PointF[] pointfs = Array.ConvertAll(contour.ToArray(), 
            input => new PointF(input.X, input.Y));

        //just an example
        var circle = new CircleF(pointfs[index], 2.0f);
    }