56     if( !descriptors.empty() )  in add()
58         CV_Assert( descriptors[0].cols == _descriptors.cols );  in add()
59         CV_Assert( descriptors[0].type() == _descriptors.type() );  in add()
67     descriptors.push_back(_descriptors);  in add()
72     return descriptors;  in getDescriptors()
77     return descriptors.empty() ? 0 : size;  in descriptorsCount()
82     descriptors.clear();  in clear()
92     CV_Assert( !descriptors.empty() );  in cluster()
95     for( size_t i = 0; i < descriptors.size(); i++ )  in cluster()
96         descCount += descriptors[i].rows;  in cluster()
98     Mat mergedDescriptors( descCount, descriptors[0].cols, descriptors[0].type() );  in cluster()
99     for( size_t i = 0, start = 0; i < descriptors.size(); i++ )  in cluster()
101         Mat submut = mergedDescriptors.rowRange((int)start, (int)(start + descriptors[i].rows));  in cluster()
102         descriptors[i].copyTo(submut);  in cluster()
103         start += descriptors[i].rows;  in cluster()
144 …                            std::vector<std::vector<int> >* pointIdxsOfClusters, Mat* descriptors )  in compute()  argument
158     if (descriptors) {  in compute()
159         *descriptors = _descriptors.clone();  in compute()