Kinect SDK中的OpenNI2+Nite2 isNew() isLost()方法

Question

最近，我为一个项目从OpenNI2+Nite2混合版本切换到了正式的Kinect SDK。在nite中，我的代码如下：

const nite::Array<nite::UserData>& users = frame.getUsers();

for (int i=0; i<users.getSize(); i++){
    const nite::UserData& user = users[i]; 

if(user.isNew()){/* do this */}
if(user.isLost()){/* do that */}
else {/* update*/}

但是，我找不到与Kinect SDK中的isNew & isLost相同的方法。我为isNew实现了自己的方法，但isLost失败了。

    // handle user exit
map<string,Group3D*> g3D_copy = g3D;

for(map<string,Group3D*>::iterator mit = g3D_copy.begin();mit != g3D_copy.end();mit++){


    if(mit->second->getType() == "KINECT_SKELETON")
    {
        string groupID = mit->first;
        int countExistance2 = 0;

        for (int i = 0; i < NUI_SKELETON_COUNT; i++){

            int userID = (int)SkeletonFrame.SkeletonData[i].dwTrackingID;
            char buffer [33];
            sprintf(buffer,"%lu",SkeletonFrame.SkeletonData[i].dwTrackingID);
            string myID2 = buffer;
            cout << "groupID " << groupID << endl;
            cout << "myID2 " << myID2 << endl;
            if(myID2 == groupID){ countExistance2++;}       

        }
        // user lost
        if(countExistance2 == 0){
            delete g3D[groupID];
            g3D.erase(groupID);
            cout << "*************deleted*******" << endl;
        }
    }

}

最基本的是，如果骨架丢失，我将在每次更新骨架帧时，将专用槽擦除到一个名为g3D的地图中的骨架上。

任何想法或敏锐的眼睛都会受到赞赏。

Answer 1

最后，我通过计算没有跟踪骨架的帧来解决这个问题。骨架数据有6个插槽，在某些帧中，它的跟踪id没有设置为NUI_SKELETON_TRACKED。因此，如果空骨架槽的数量超过20 (这意味着appx 3-4连续空帧)，我假设用户丢失了。

    // handle user exit
// The skeleton is not tracked in every successive frame, so use g3DCounts to count the number of frames
map<string,Group3D*> g3D_copy = g3D;

for(map<string,Group3D*>::iterator mit = g3D_copy.begin();mit != g3D_copy.end();mit++){

    if(mit->second->getType() == "KINECT_SKELETON")
    {
        string groupID = mit->first;

        for (int i = 0; i < NUI_SKELETON_COUNT; i++){
            char buffer [33];
            sprintf(buffer,"%lu",SkeletonFrame.SkeletonData[i].dwTrackingID);
            string myID2 = buffer;
            if(myID2 == groupID){ g3DCounts[groupID] = 0;}
            else{ g3DCounts[groupID] += 1;}
        }

        if(g3DCounts[groupID] > 20){
            delete g3D[groupID];
            g3D.erase(groupID);
            cout << "*************deleted successfully*******" << endl;
        }
    }
}

希望它能帮助别人