c# - Kinect 横向骨骼追踪

Question

目前我正在使用 Microsoft Kinect 测量关节之间的角度。大多数测量工作正常。每当一个人侧身(坐在椅子上)时，Kinect 就不会准确地跟踪骨骼。为了说明我的问题，我添加了 3 张 Kinect 深度 View 的图片。

如您所见，三分之二的测量结果“正确”。每当我抬起腿时，Kinect 就会正确停止骨骼跟踪。有没有人能解决这个问题，或者这只是 Kinect 的局限性？

谢谢。

更新 1:屏幕截图 2 中显示的这些跟踪关节上的 JointTrackingState-Enumeration 标记为 Inferred，但深度 View 正在跟踪我的全身。

更新 2:在屏幕截图 2 中，我试图追踪我的前腿，突出显示为绿色。我知道另一条腿没有被追踪，但我想这并不重要。

更新 3:以下代码选择骨架:

private Skeleton StickySkeleton(Skeleton[] skeletons)
{
    if (skeletons.Count<Skeleton>(skeleton => skeleton.TrackingId == _trackedSkeletonId) <= 0)
    {
        _trackedSkeletonId = -1;
        _skeleton = null;
    }

    if (_trackedSkeletonId == -1)
    {
        Skeleton foundSkeleton = skeletons.FirstOrDefault<Skeleton>(skeleton => skeleton.TrackingState == SkeletonTrackingState.Tracked);

        if (foundSkeleton != null)
        {
            _trackedSkeletonId = foundSkeleton.TrackingId;
            return foundSkeleton;
        }
    }

    return _skeleton;
}

每当跟踪骨骼时，数据将用于绘制关节点和计算关节之间的角度。

更新 4:我测试过坐在一个“ block ”上，比椅子简单得多。不幸的是，Kinect 仍然表现相同。

以下2张截图:

Answer 1

正如 Renaud Dumont 所说，我会用 JointTrackingState 做一些事情。由于您使用膝盖，我使用变量 leftknee 和 rightknee 来执行此操作，它们是 Joints。这是代码，您可以使用 JointType.FootRight 和 JointType.FootLeft 以及 Hip 类型，但我会把它留给您。

static Skeleton first = new Skeleton();

Joint leftknee = first.Joints[JointType.KneeLeft];
Joint rightknee = first.Joints[JointType.KneeRight];

if ((leftknee.TrackingState == JointTrackingState.Inferred ||
                leftknee.TrackingState == JointTrackingState.Tracked) && 
                (rightknee.TrackingState == JointTrackingState.Tracked ||
                rightknee.TrackingState == JointTrackingState.Inferred))
            {

            }

或者，如果您只想一次跟踪一个膝盖，或同时跟踪两个膝盖，您可以这样做:

if ((leftknee.TrackingState == JointTrackingState.Inferred ||
                leftknee.TrackingState == JointTrackingState.Tracked) && 
                (rightknee.TrackingState == JointTrackingState.Tracked ||
                rightknee.TrackingState == JointTrackingState.Inferred))
            {

            }

            else if (leftknee.TrackingState == JointTrackingState.Inferred ||
                    leftknee.TrackingState == JointTrackingState.Tracked)
            {

            }

            else if (rightknee.TrackingState == JointTrackingState.Inferred ||
                    rightknee.TrackingState == JointTrackingState.Tracked)
            {

            }

仅供引用，Skeleton first 是static 的原因是因为它可以用于制作关节

 static Skeleton first;

反对

 Skeleton first;

编辑1

我得出的结论是，这 极其很难做到，我认为上述方法会奏效，但我只是想包括我正在做的事情，以防你能找到一些让它工作的方法。无论如何这是我正在处理的代码，它是另一个 class 这只是另一个 SkeletalTrackingState 我试图制作一个 Inferred enum 在里面。但不幸的是 enum 是 impossible 继承。如果您发现这种效果有效，我将永远尊重您，因为您是我的优秀程序员；)。事不宜迟:我试图制作的 .dll:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Kinect;

namespace IsInferred
{
public abstract class SkeletonInferred : Skeleton
{
    public bool inferred;
    static Skeleton first1 = new Skeleton();
    Joint handright;
    Joint handleft;
    Joint footright;
    Joint footleft;
    Joint ankleleft;
    Joint ankleright;
    Joint elbowleft;
    Joint elbowright;
    Joint head;
    Joint hipcenter;
    Joint hipleft;
    Joint hipright;
    Joint shouldercenter;
    Joint shoulderleft;
    Joint shoulderright;
    Joint kneeleft;
    Joint kneeright;
    Joint spine;
    Joint wristleft;
    Joint wristright;

    public SkeletonInferred(bool inferred)
    {

    }

    public enum Inferred
    {
        NotTracked = SkeletonTrackingState.NotTracked,
        PositionOnly = SkeletonTrackingState.PositionOnly,
        Tracked = SkeletonTrackingState.Tracked,
        Inferred = 3,
    }

    private void IsInferred(object sender, AllFramesReadyEventArgs e)
    {
        handright = first1.Joints[JointType.HandRight];
        handleft = first1.Joints[JointType.HandLeft];
        footright = first1.Joints[JointType.FootRight];
        footleft = first1.Joints[JointType.FootLeft];
        ankleleft = first1.Joints[JointType.AnkleLeft];
        ankleright = first1.Joints[JointType.AnkleRight];
        elbowleft = first1.Joints[JointType.ElbowLeft];
        elbowright = first1.Joints[JointType.ElbowRight];
        head = first1.Joints[JointType.Head];
        hipcenter = first1.Joints[JointType.HipCenter];
        hipleft = first1.Joints[JointType.HipLeft];
        hipright = first1.Joints[JointType.HipRight];
        shouldercenter = first1.Joints[JointType.ShoulderCenter];
        shoulderleft = first1.Joints[JointType.ShoulderLeft];
        shoulderright = first1.Joints[JointType.ShoulderRight];
        kneeleft = first1.Joints[JointType.KneeLeft];
        kneeright = first1.Joints[JointType.KneeRight];
        spine = first1.Joints[JointType.Spine];
        wristleft = first1.Joints[JointType.WristLeft];
        wristright = first1.Joints[JointType.WristRight];

        if (handleft.TrackingState == JointTrackingState.Inferred &
            handright.TrackingState == JointTrackingState.Inferred &
            head.TrackingState == JointTrackingState.Inferred &
            footleft.TrackingState == JointTrackingState.Inferred &
            footright.TrackingState == JointTrackingState.Inferred &
            ankleleft.TrackingState == JointTrackingState.Inferred &
            ankleright.TrackingState == JointTrackingState.Inferred &
            elbowleft.TrackingState == JointTrackingState.Inferred &
            elbowright.TrackingState == JointTrackingState.Inferred &
            hipcenter.TrackingState == JointTrackingState.Inferred &
            hipleft.TrackingState == JointTrackingState.Inferred &
            hipright.TrackingState == JointTrackingState.Inferred &
            shouldercenter.TrackingState == JointTrackingState.Inferred &
            shoulderleft.TrackingState == JointTrackingState.Inferred &
            shoulderright.TrackingState == JointTrackingState.Inferred &
            kneeleft.TrackingState == JointTrackingState.Inferred &
            kneeright.TrackingState == JointTrackingState.Inferred &
            spine.TrackingState == JointTrackingState.Inferred &
            wristleft.TrackingState == JointTrackingState.Inferred &
            wristright.TrackingState == JointTrackingState.Inferred)
        {
            inferred = true;
        }
      }
    }
  }

你项目中的代码(编译错误)

    using IsInferred;

    static bool Inferred = false;
    SkeletonInferred inferred = new SkeletonInferred(Inferred);
    static Skeleton first1 = new Skeleton();

    Skeleton foundSkeleton = skeletons.FirstOrDefault<Skeleton>(skeleton =>  skeleton.TrackingState == SkeletonTrackingState.Inferred);

祝你好运，我希望这能帮助你朝着正确的方向前进或对你有所帮助!

我的代码

这是您要求的我的代码。是的，它来自 Skeletal Tracking Fundamentals ，但是这段代码就在这里，我不想用大部分相同的东西开始一个新项目。享受!

代码

     // (c) Copyright Microsoft Corporation.
     // This source is subject to the Microsoft Public License (Ms-PL).
    // Please see http://go.microsoft.com/fwlink/?LinkID=131993 for details.
    // All other rights reserved.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Microsoft.Kinect;
using Coding4Fun.Kinect.Wpf; 

namespace SkeletalTracking
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    bool closing = false;
    const int skeletonCount = 6; 
    Skeleton[] allSkeletons = new Skeleton[skeletonCount];

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        kinectSensorChooser1.KinectSensorChanged += new  DependencyPropertyChangedEventHandler(kinectSensorChooser1_KinectSensorChanged);

    }

    void kinectSensorChooser1_KinectSensorChanged(object sender, DependencyPropertyChangedEventArgs e)
    {
        KinectSensor old = (KinectSensor)e.OldValue;

        StopKinect(old);

        KinectSensor sensor = (KinectSensor)e.NewValue;

        if (sensor == null)
        {
            return;
        }




        var parameters = new TransformSmoothParameters
        {
            Smoothing = 0.3f,
            Correction = 0.0f,
            Prediction = 0.0f,
            JitterRadius = 1.0f,
            MaxDeviationRadius = 0.5f
        };
        sensor.SkeletonStream.Enable(parameters);

        //sensor.SkeletonStream.Enable();

        sensor.AllFramesReady += new EventHandler<AllFramesReadyEventArgs>(sensor_AllFramesReady);
        sensor.DepthStream.Enable(DepthImageFormat.Resolution640x480Fps30); 
        sensor.ColorStream.Enable(ColorImageFormat.RgbResolution640x480Fps30);

        try
        {
            sensor.Start();
        }
        catch (System.IO.IOException)
        {
            kinectSensorChooser1.AppConflictOccurred();
        }
    }

    void sensor_AllFramesReady(object sender, AllFramesReadyEventArgs e)
    {
        if (closing)
        {
            return;
        }

        //Get a skeleton
        Skeleton first =  GetFirstSkeleton(e);

        if (first == null)
        {
            return; 
        }



        //set scaled position
        //ScalePosition(headImage, first.Joints[JointType.Head]);
        ScalePosition(leftEllipse, first.Joints[JointType.HandLeft]);
        ScalePosition(rightEllipse, first.Joints[JointType.HandRight]);
        ScalePosition(leftknee, first.Joints[JointType.KneeLeft]);
        ScalePosition(rightknee, first.Joints[JointType.KneeRight]);

        GetCameraPoint(first, e); 

    }

    void GetCameraPoint(Skeleton first, AllFramesReadyEventArgs e)
    {

        using (DepthImageFrame depth = e.OpenDepthImageFrame())
        {
            if (depth == null ||
                kinectSensorChooser1.Kinect == null)
            {
                return;
            }


            //Map a joint location to a point on the depth map
            //head
            DepthImagePoint headDepthPoint =
                depth.MapFromSkeletonPoint(first.Joints[JointType.Head].Position);
            //left hand
            DepthImagePoint leftDepthPoint =
                depth.MapFromSkeletonPoint(first.Joints[JointType.HandLeft].Position);
            //right hand
            DepthImagePoint rightDepthPoint =
                depth.MapFromSkeletonPoint(first.Joints[JointType.HandRight].Position);

            DepthImagePoint rightKnee =
                depth.MapFromSkeletonPoint(first.Joints[JointType.KneeRight].Position);

            DepthImagePoint leftKnee =
                depth.MapFromSkeletonPoint(first.Joints[JointType.KneeLeft].Position);


            //Map a depth point to a point on the color image
            //head
            ColorImagePoint headColorPoint =
                depth.MapToColorImagePoint(headDepthPoint.X, headDepthPoint.Y,
                ColorImageFormat.RgbResolution640x480Fps30);
            //left hand
            ColorImagePoint leftColorPoint =
                depth.MapToColorImagePoint(leftDepthPoint.X, leftDepthPoint.Y,
                ColorImageFormat.RgbResolution640x480Fps30);
            //right hand
            ColorImagePoint rightColorPoint =
                depth.MapToColorImagePoint(rightDepthPoint.X, rightDepthPoint.Y,
                ColorImageFormat.RgbResolution640x480Fps30);

            ColorImagePoint leftKneeColorPoint =
                depth.MapToColorImagePoint(leftKnee.X, leftKnee.Y,
                ColorImageFormat.RgbResolution640x480Fps30);

            ColorImagePoint rightKneeColorPoint =
                depth.MapToColorImagePoint(rightKnee.X, rightKnee.Y,
                ColorImageFormat.RgbResolution640x480Fps30);



            //Set location
            CameraPosition(headImage, headColorPoint);
            CameraPosition(leftEllipse, leftColorPoint);
            CameraPosition(rightEllipse, rightColorPoint);


            Joint LEFTKNEE = first.Joints[JointType.KneeLeft];
            Joint RIGHTKNEE = first.Joints[JointType.KneeRight];

            if ((LEFTKNEE.TrackingState == JointTrackingState.Inferred ||
            LEFTKNEE.TrackingState == JointTrackingState.Tracked) &&
            (RIGHTKNEE.TrackingState == JointTrackingState.Tracked ||
            RIGHTKNEE.TrackingState == JointTrackingState.Inferred))
            {
                CameraPosition(rightknee, rightKneeColorPoint);
                CameraPosition(leftknee, leftKneeColorPoint);
            }

            else if (LEFTKNEE.TrackingState == JointTrackingState.Inferred ||
                    LEFTKNEE.TrackingState == JointTrackingState.Tracked)
            {
                CameraPosition(leftknee, leftKneeColorPoint);
            }

            else if (RIGHTKNEE.TrackingState == JointTrackingState.Inferred ||
                    RIGHTKNEE.TrackingState == JointTrackingState.Tracked)
            {
                CameraPosition(rightknee, rightKneeColorPoint);
            }
        }        
    }


    Skeleton GetFirstSkeleton(AllFramesReadyEventArgs e)
    {
        using (SkeletonFrame skeletonFrameData = e.OpenSkeletonFrame())
        {
            if (skeletonFrameData == null)
            {
                return null; 
            }


            skeletonFrameData.CopySkeletonDataTo(allSkeletons);

            //get the first tracked skeleton
            Skeleton first = (from s in allSkeletons
                                     where s.TrackingState == SkeletonTrackingState.Tracked
                                     select s).FirstOrDefault();

            return first;

        }
    }

    private void StopKinect(KinectSensor sensor)
    {
        if (sensor != null)
        {
            if (sensor.IsRunning)
            {
                //stop sensor 
                sensor.Stop();

                //stop audio if not null
                if (sensor.AudioSource != null)
                {
                    sensor.AudioSource.Stop();
                }


            }
        }
    }

    private void CameraPosition(FrameworkElement element, ColorImagePoint point)
    {
        //Divide by 2 for width and height so point is right in the middle 
        // instead of in top/left corner
        Canvas.SetLeft(element, point.X - element.Width / 2);
        Canvas.SetTop(element, point.Y - element.Height / 2);

    }

    private void ScalePosition(FrameworkElement element, Joint joint)
    {
        //convert the value to X/Y
        //Joint scaledJoint = joint.ScaleTo(1280, 720); 

        //convert & scale (.3 = means 1/3 of joint distance)
        Joint scaledJoint = joint.ScaleTo(1280, 720, .3f, .3f);

        Canvas.SetLeft(element, scaledJoint.Position.X);
        Canvas.SetTop(element, scaledJoint.Position.Y); 

    }


    private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
    {
        closing = true; 
        StopKinect(kinectSensorChooser1.Kinect); 
    }

    private void kinectDepthViewer1_Loaded(object sender, RoutedEventArgs e)
    {

    }

   }
}

XAML

<Window x:Class="SkeletalTracking.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="600" Width="800" Loaded="Window_Loaded" 
    xmlns:my="clr-namespace:Microsoft.Samples.Kinect.WpfViewers;assembly=Microsoft.Samples.Kinect.WpfViewers" 
    Closing="Window_Closing" WindowState="Maximized">       
<Canvas Name="MainCanvas">
    <my:KinectColorViewer Canvas.Left="0" Canvas.Top="0" Width="640" Height="480" Name="kinectColorViewer1" 
                          Kinect="{Binding ElementName=kinectSensorChooser1, Path=Kinect}" />
    <Ellipse Canvas.Left="0" Canvas.Top="0" Height="50" Name="leftEllipse"  Width="50" Fill="#FF4D298D" Opacity="1" Stroke="White" />
    <Ellipse Canvas.Left="100" Canvas.Top="0" Fill="#FF2CACE3" Height="50" Name="rightEllipse" Width="50" Opacity="1" Stroke="White" />
    <my:KinectSensorChooser Canvas.Left="250" Canvas.Top="380" Name="kinectSensorChooser1" Width="328" />
    <Image Canvas.Left="66" Canvas.Top="90" Height="87" Name="headImage" Stretch="Fill" Width="84" Source="/SkeletalTracking;component/c4f-color.png" />
    <Ellipse Canvas.Left="283" Canvas.Top="233" Height="23" Name="leftknee" Stroke="Black" Width="29" />
    <Ellipse Canvas.Left="232" Canvas.Top="233" Height="23" Name="rightknee" Stroke="Black" Width="30" />
</Canvas>

这里有一张图片只是为了展示 Kinect 有时会如何关闭:

提示:注意如何只检测到我的 ARM 和部分背景