Question

我被困了好几天才能计算出行动的速度，所以我会试着更多地解释我的问题。

我必须应用一个允许使用kinect SDK和VS c＃检测跌倒的方法。

这个approche将3Box的3个维度作为输入，从骨架关节的坐标建立。

这些维度是：

W = | xMin - xMax |;

H = | yMin - yMax |;

D = | zMin - zMax |;

xMin，xMax，yMin，yMax，zMin，zMax是所有被跟踪关节中坐标的最小值和最大值。

此时，这不是问题..我已经计算了所有这些值：

 List<Joint> JointList = new List<Joint>();
    List<double> JCx = new List<double>();
    List<double> JCy = new List<double>();
    List<double> JCz = new List<double>();

//将坐标的最小值和最大值定义为kinect

的视图

    private double xMin = 2.2;
    private double xMax = -2.2;
    private int framecounter = 0;
    private double yMin = 1.6;
    private double yMax = -1.6;
    private double zMin = 4;
    private double zMax = 0;

Skeleton first = GetFirstSkeleton(allFramesReadyEventArgs);


        if (first == null) // if no skeleton
        {
            txtP.Text = "No One"; 
            return;
        }

        else
        {
            txtP.Text = "Yes";
            skeletonDetected = true;


            /// define all joints

            Joint Head = first.Joints[JointType.Head];
            JointList.Add(Head);
            Joint SC = first.Joints[JointType.ShoulderCenter];
            JointList.Add(SC);
            Joint SL = first.Joints[JointType.ShoulderLeft];
            JointList.Add(SL);
            Joint SR = first.Joints[JointType.ShoulderRight];
            JointList.Add(SR);
            Joint EL = first.Joints[JointType.ElbowLeft];
            JointList.Add(EL);
            Joint ER = first.Joints[JointType.ElbowRight];
            JointList.Add(ER);
            Joint WL = first.Joints[JointType.WristLeft];
            JointList.Add(WL);
            Joint WR = first.Joints[JointType.WristRight];
            JointList.Add(WR);
            Joint HandL = first.Joints[JointType.HandLeft];
            JointList.Add(HandL);
            Joint HandR = first.Joints[JointType.HandRight];
            JointList.Add(HandR);
            Joint Spine = first.Joints[JointType.Spine];
            JointList.Add(Spine);
            Joint HipC = first.Joints[JointType.HipCenter];
            JointList.Add(HipC);
            Joint HipL = first.Joints[JointType.HipLeft];
            JointList.Add(HipL);
            Joint HipR = first.Joints[JointType.HipRight];
            JointList.Add(HipR);
            Joint KL = first.Joints[JointType.KneeLeft];
            JointList.Add(KL);
            Joint KR = first.Joints[JointType.KneeRight];
            JointList.Add(KR);
            Joint AnkL = first.Joints[JointType.AnkleLeft];
            JointList.Add(AnkL);
            Joint AnkR = first.Joints[JointType.AnkleRight];
            JointList.Add(AnkR);
            Joint FL = first.Joints[JointType.FootLeft];
            JointList.Add(FL);
            Joint FR = first.Joints[JointType.FootRight];
            JointList.Add(FR);

//计算每个关节的x，y和z坐标 //把它放到3个不同的列表中

            foreach (Joint j in JointList)
            {
                if (j.TrackingState == JointTrackingState.Tracked)

                jx = j.Position.X;
                JCx.Add(jx);
                jy = j.Position.Y;
                JCy.Add(jy);
                jz = j.Position.Z;              
                JCz.Add(jz);

                foreach (double f in JCx)
                {

                    if (f < xMin)
                        xMin = f;
                    else if (f > xMax)
                        xMax = f;
                }

                foreach (double f in JCy)
                {


                    if (f < yMin)
                        yMin = f;
                    else if (f > yMax)
                        yMax = f;
                }

                foreach (double f in JCz)
                {

                    if (f < zMin)
                        zMin = f;
                    else if (f > zMax)
                        zMax = f;

                }


            }
            txtminx.Text = xMin.ToString();
            txtmaxx.Text = xMax.ToString();
            txtminy.Text = yMin.ToString();
            txtmaxy.Text = yMax.ToString();
            txtminz.Text = zMin.ToString();
            txtmaxz.Text = zMax.ToString();

//计算Box的3个维度和对角线WD

            double W = System.Math.Abs(xMin - xMax);
            double H = System.Math.Abs(yMin - yMax);
            double D = System.Math.Abs(zMin - zMax);
            double WD = System.Math.Sqrt(Math.Pow(W0, 2) + Math.Pow(D0, 2));

问题是当我必须计算箱子尺寸vH和vWD的速度时。

vH =（Hi-H0）/（Ti-T0）;

vWD =（WD-WD0）/（Ti-T0）;

我尝试使用DateTime.UtcNow和Stopwatch来计算时间花费

   DateTime T0 = DateTime.UtcNow;

Stopwatch _stopwatch = Stopwatch.StartNew();
DateTime Ti = DateTime.UtcNow;

但我不知道如何在第一次获得H值，而且我也不知道这种方法是否会给我真正的结果。

任何人都可以帮助我吗？

提前致谢

Answer 1

我在一个应用程序中做了类似的事情。我在应用程序启动时启动了一个StopWatch：

System.Diagnostics.Stopwatch stopWatch = new System.Diagnostics.Stopwatch();
int msNow;
int msPast;
int dif;
TimeSpan currentTime;
TimeSpan lastTime = new TimeSpan(0);
public GaitAnalyzer()
{
        stopWatch.Start();
}

然后你必须做这样的事情：

currentTime = stopWatch.Elapsed;
msNow = currentTime.Seconds * 1000 + currentTime.Milliseconds;
if(lastTime.Ticks != 0)
{
     msPast = lastTime.Seconds * 1000 + lastTime.Milliseconds;
     dif = msNow - msPast;    
}
lastTime = currentTime;

使用DateTime和Stopwatch通过kinect sdk计算速度

1 个答案: