| std::vector<QuidTable*> Impala::Core::Table::AnnotationTable::MakeEpisodeFolds | ( | int | foldCount, | |
| int | repetition | |||
| ) | [inline] |
This function creates 'episode contrained' folds from annotation.
This can only be done in VideoSets. As epipsodes are undefined in ImageSets.
Definition at line 487 of file AnnotationTable.h.
References GetAnnotatedQuids(), GetNegative(), GetPositive(), GetQuidClass(), GroupPerVideo(), ILOG_DEBUG, ILOG_ERROR, MakeRandomFolds(), Impala::QUID_CLASS_FRAME, Impala::QUID_CLASS_KEYFRAME, Impala::QUID_CLASS_SHOT, Impala::Core::Table::SelectOneColumn(), and Impala::Core::Table::Table::Size().
Referenced by Impala::Core::Training::TrainDataSrc::MakeFolds().
00488 { 00489 ILOG_DEBUG("entering MakeEpisodeFolds"); 00490 00491 int quidclass = GetQuidClass(); 00492 if(quidclass != QUID_CLASS_SHOT && 00493 quidclass != QUID_CLASS_KEYFRAME && 00494 quidclass != QUID_CLASS_FRAME) 00495 { 00496 ILOG_WARNING_HEADNODE("annotees of wrong quidclass, cannot do episode " << 00497 "constrained"); 00498 return MakeRandomFolds(foldCount, repetition); 00499 } 00500 00501 if(foldCount <= 1) 00502 { 00503 ILOG_ERROR("we need at least 2 folds"); 00504 return std::vector<QuidTable*>(1, GetAnnotatedQuids()); 00505 } 00506 00507 QuidTable* positive = GetPositive(); 00508 QuidTable* negative = GetNegative(); 00509 ILOG_DEBUG_NODE("make episode folds: #annotations = " << 00510 positive->Size() + negative->Size()); 00511 00512 // group per video 00513 std::vector<int> positiveVideos; 00514 std::vector<int> negativeVideos; 00515 GroupPerVideo(positive, negative, positiveVideos, negativeVideos); 00516 delete positive; 00517 delete negative; 00518 00519 std::vector<QuidTable*> folds; 00520 for(int i=0 ; i<foldCount ; i++) 00521 folds.push_back(new QuidTable(0)); 00522 00523 // distribute 'positive' videos 00524 int lastFold=0; 00525 Util::QuasiRandomSequenceIterator pos(positiveVideos.size(),repetition); 00526 for(int i=0 ; i<positiveVideos.size() ; ++i) 00527 { 00528 CriterionQuidObjectEquals<AnnotationTable> 00529 c(positiveVideos[*pos]); 00530 SelectOneColumn(folds[lastFold], this, 1, c, false); 00531 ++pos; 00532 ++lastFold; 00533 if(lastFold >= foldCount) 00534 lastFold = 0; 00535 } 00536 00537 // distribute 'negative' videos 00538 Util::QuasiRandomSequenceIterator neg(negativeVideos.size(),repetition); 00539 for(int i=0 ; i<negativeVideos.size() ; ++i) 00540 { 00541 CriterionQuidObjectEquals<AnnotationTable> 00542 c(negativeVideos[*neg]); 00543 SelectOneColumn(folds[lastFold], this, 1, c, false); 00544 ++neg; 00545 ++lastFold; 00546 if(lastFold >= foldCount) 00547 lastFold = 0; 00548 } 00549 00550 ILOG_DEBUG("leaving MakeFolds"); 00551 return folds; 00552 }
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