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

Question

我最近从OpenNI2+Nite2转换为一个项目的官方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*/}

然而，我找不到一个与isNew&is在Kinect SDK中丢失。我为isNew实现了自己的方法，但在isLost中失败了。

    // 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;
        }
    }
}

基本上，如果骨架丢失，我会在每次更新骨架帧时，尝试删除名为g3D的贴图中骨架的专用槽。

任何想法或敏锐的眼光都值得赞赏。

Answer 1

最后，我通过计算没有跟踪骨架的帧来解决问题。骨架数据有6个槽，在某些帧中，其跟踪id未设置为NUI_Skeleton_TRACKED。因此，如果空骨架槽的数量超过20（这意味着appx 3-4个连续的空帧），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;
        }
    }
}

希望它能帮助其他