opencvsharp LineSegmentPoint perpLine 与 LineSegmentPoint caliperLine 的交点

要求LineSegmentPoint perpLine 与 LineSegmentPoint caliperLine 的交点，可以按照以下步骤进行：

1. 对于每个线段，计算其法向量，即perpLine和caliperLine的垂直向量。可以通过计算线段的端点坐标差值来得到线段方向向量，然后将该向量旋转90度即可得到法向量。

2. 对于每个法向量，找到它与另一条线段的交点。可以使用点线距离公式（Perpendicular distance between a point and a line）计算每个线段端点到另一条线段的距离，然后找到距离最小的那个点作为交点。

3. 返回所有交点。

以下是示例代码（使用C#和OpenCvSharp）：

using System;
using OpenCvSharp;

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            // 创建两个线段
            var line1 = new LineSegmentPoint(new Point2f(100, 100), new Point2f(200, 200));
            var line2 = new LineSegmentPoint(new Point2f(150, 50), new Point2f(150, 150));

            // 计算线段的方向向量和法向量
            var dir1 = line1.P2 - line1.P1;
            var dir2 = line2.P2 - line2.P1;
            var normal1 = new Point2f(-dir1.Y, dir1.X);
            var normal2 = new Point2f(-dir2.Y, dir2.X);

            // 计算两个线段的交点
            var intersection1 = GetIntersection(normal1, line1, line2);
            var intersection2 = GetIntersection(normal2, line2, line1);

            // 输出结果
            Console.WriteLine($"Intersection1: ({intersection1.X}, {intersection1.Y})");
            Console.WriteLine($"Intersection2: ({intersection2.X}, {intersection2.Y})");
        }

        static Point2f GetIntersection(Point2f normal, LineSegmentPoint line1, LineSegmentPoint line2)
        {
            // 计算线段端点到直线的距离
            var dist1 = DistancePointLine(line1.P1, line2.P1, line2.P2);
            var dist2 = DistancePointLine(line1.P2, line2.P1, line2.P2);

            // 找到距离最小的点
            var closestPoint = dist1 < dist2 ? line1.P1 : line1.P2;

            // 计算交点
            var t = (closestPoint - line2.P1).Dot(normal) / normal.Dot(line2.P2 - line2.P1);
            return line2.P1 + t * (line2.P2 - line2.P1);
        }

        static float DistancePointLine(Point2f point, Point2f lineStart, Point2f lineEnd)
        {
            var lineDir = lineEnd - lineStart;
            return Math.Abs(lineDir.Y * point.X - lineDir.X * point.Y + lineEnd.X * lineStart.Y - lineEnd.Y * lineStart.X) / lineDir.DistanceTo(lineStart);
        }
    }
}