學習圖像處理知識---EmguCv3.4 的PointCollection類

PointCollection類為靜态類 ，Namespace:  Emgu.CV

1.通過點集确定矩形

public static Rectangle BoundingRectangle(
	PointF[] points
)      

2.通過點集确認橢圓

public static Ellipse EllipseLeastSquareFitting(
	PointF[] points
)      

3.在橢圓周圍生成一個随機點雲。

public static PointF[] GeneratePointCloud(
	Ellipse e, 
	int numberOfPoints // 點的個數
)      

4.把點轉換為線

public static LineSegment2D[] PolyLine(
	Point[] points,
	bool closed
)      

public static LineSegment2DF[] PolyLine(
	PointF[] points,
	bool closed
)      

5.單通道像素點轉換到3D數組中

Re-project pixels on a 1-channel disparity map to array of 3D points.

public static MCvPoint3D32f[] ReprojectImageTo3D(
	IInputArray disparity,
	IInputArray Q
)      

案例學習：

  PointF [] ki = new PointF[]{ new PointF(20, 20), new PointF(100, 20),  new PointF(20, 120) , new PointF(100, 120), new PointF(110, 125), new PointF(200, 300) };

          Rectangle a1=  PointCollection.BoundingRectangle(ki);  矩形

   //Ellipse a1 = PointCollection.EllipseLeastSquareFitting(ki);   橢圓

 LineSegment2DF[] ko = PointCollection.PolyLine(ki, false);  采用不閉合

            Emgu.CV.Image<Bgr, Byte> g2 = GG.ToImage<Bgr, Byte>();

            g2.Draw(a1, new Bgr(Color.Red));  //可以看出繪圖矩形按照最大點位畫出，而橢圓卻不是采用。

 foreach (var jj in ko)

            {

                g2.Draw(jj, new Bgr(Color.Red),2);

            }

            imageBox1.Image = g2;