Kinect for Windows SDK v2.0 开发笔记 (五)骨骼帧与笑面男_kinect sdk 2.0获取骨骼坐标-优快云博客

本文链接：https://blog.youkuaiyun.com/dustpg/article/details/38126079

本文介绍了如何使用Kinect for Windows SDK v2.0进行骨骼追踪，特别是关注于如何获取和绘制25个骨骼关节，并通过Direct2D实现类似《攻壳机动队 S.A.C》中笑面男的实时打码效果。文章中详细讲解了骨骼数据的获取、关节状态判断以及利用Direct2D 1.1绘制旋转文字和几何形状的方法。

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使用SDK: Kinect for Windows SDK v2.0 public preview

这次说说这骨骼帧的获取。嗯，Kinect买来就为这个啊。不然其他数据，买其他产品就行了，Kinect的卖点也是这个。

先看看这次支持的骨骼关节:

enum _JointType
    {
        JointType_SpineBase	= 0,
        JointType_SpineMid	= 1,
        JointType_Neck	= 2,
        JointType_Head	= 3,
        JointType_ShoulderLeft	= 4,
        JointType_ElbowLeft	= 5,
        JointType_WristLeft	= 6,
        JointType_HandLeft	= 7,
        JointType_ShoulderRight	= 8,
        JointType_ElbowRight	= 9,
        JointType_WristRight	= 10,
        JointType_HandRight	= 11,
        JointType_HipLeft	= 12,
        JointType_KneeLeft	= 13,
        JointType_AnkleLeft	= 14,
        JointType_FootLeft	= 15,
        JointType_HipRight	= 16,
        JointType_KneeRight	= 17,
        JointType_AnkleRight	= 18,
        JointType_FootRight	= 19,
        JointType_SpineShoulder	= 20,
        JointType_HandTipLeft	= 21,
        JointType_ThumbLeft	= 22,
        JointType_HandTipRight	= 23,
        JointType_ThumbRight	= 24,
        JointType_Count	= ( JointType_ThumbRight + 1 ) 
    } ;

支持这25个关节点，不排除会增加的可能，毕竟近景可以分辨十指。

每个关节的状态用这个结构体描述:

typedef struct _Joint
    {
    JointType JointType;
    CameraSpacePoint Position;
    TrackingState TrackingState;
    } 	Joint;

JointType就是之前的关节编号，Position是Kinect的相机空间坐标，是三维的。TrackingState是目前关节的追踪状态，

有: 未追踪(0)，位置是推测的(1)，位置是追踪的(2)

值得说明的是这次C++的SDK也提供了判断手的状态：

enum _HandState
    {
        HandState_Unknown	= 0,
        HandState_NotTracked	= 1,
        HandState_Open	= 2,
        HandState_Closed	= 3,
        HandState_Lasso	= 4
    } ;

有:未知(0)，未追踪(1)，摊开(2)，握拳(3)以及Lasso(4)，Lasso不知道怎么翻译，大概就是处于摊开与握拳之间的状态，

比如:或者甚至这样都能称为Lasso。