What Helps Where – And Why? Semantic Relatedness for Knowledge Transfer Marcus Rohrbach 1,2 Michael Stark 1,2 György Szarvas 1 Iryna Gurevych 1 Bernt Schiele.

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Presentation transcript:

What Helps Where – And Why? Semantic Relatedness for Knowledge Transfer Marcus Rohrbach 1,2 Michael Stark 1,2 György Szarvas 1 Iryna Gurevych 1 Bernt Schiele 1,2 1 Department of Computer Science, TU Darmstadt 2 MPI Informatics, Saarbrücken

2 Knowledge transfer for zero-shot object class recognition CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Group classes by attributes [Lampert et al., CVPR `09] Manual supervision: Object class-attribute associations Group classes by attributes [Lampert et al., CVPR `09] Manual supervision: Object class-attribute associations Describing using attributes [Farhadi et al., CVPR `09 & `10] Manual supervision: Attribute labels Describing using attributes [Farhadi et al., CVPR `09 & `10] Manual supervision: Attribute labels animal four legged mammal white paw Unseen class (no training images) Giant panda ? Attributes for knowledge transfer

3 Knowledge transfer for zero-shot object class recognition CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Describing using attributes [Farhadi et al., CVPR `09 & `10] Manual supervision: Attribute labels Describing using attributes [Farhadi et al., CVPR `09 & `10] Manual supervision: Attribute labels animal four legged mammal Group classes by attributes [Lampert et al., CVPR `09] Manual supervision: Object class-attribute associations Group classes by attributes [Lampert et al., CVPR `09] Manual supervision: Object class-attribute associations white paw Unseen class (no training images) Giant panda ? Attributes for knowledge transfer  Replace manual supervision b y semantic relatedness mined from language resources  Unsupervised Transfer WordNet Attributes for knowledge transfer

4 Attribute-based model [Lampert et al., CVPR `09] CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | ocean spots … … Known training classes Attribute classifiers Unseen test classes Class-attribute associations [Lampert et al., CVPR `09] Supervised: manual (human judges) Attributes white

5 Attribute-based model [Lampert et al., CVPR `09] CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Word Net semantic relatedness from language [Lampert et al., CVPR `09] Supervised: manual (human judges) ocean spots … … Known training classes Attribute classifiers Unseen test classes Class-attribute associations white

6 Direct similarity-based model CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Word Net semantic relatedness from language ocean spots … … Known training classes Attribute classifiers Unseen test classes Class-attribute associations white

7 Direct similarity-based model CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Word Net semantic relatedness from language Known training classes Unseen test classes Class-attribute associations Classifier per class killer whale Dalmatian polar bear

8 Direct similarity-based model CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Word Net semantic relatedness from language Unseen test classes most similar classes Known training classes Classifier per class polar bear killer whale Dalmatian … …

9  Models for visual knowledge transfer  Semantic relatedness measures  Language resources  WordNet  Wikipedia  WWW  Image search  Respective state-of-the-art measures  Evaluation  Conclusion Outline CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

10  WordNet  Lin measure [Budanitsky & Hirst, CL `06]  Wikipedia  Explicit Semantic Analysis [Gabrilovich & MarkovitchI, IJCAI `07]  Word Wide Web  Hitcount (Dice coeffient) [Kilgarriff & Grefenstette, CL `03]  Image search  Visually more relevant  Hitcount (Dice coeffient) Semantic Relatedness Measures CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | WordNet [Fellbaum, MIT press `98] WordNet [Fellbaum, MIT press `98] entityanimalmammalhorseelephantvehiclecarbike

11  WordNet  Lin measure [Budanitsky & Hirst, CL `06]  Wikipedia  Explicit Semantic Analysis [Gabrilovich & MarkovitchI, IJCAI `07]  Word Wide Web  Hitcount (Dice coeffient) [Kilgarriff & Grefenstette, CL `03]  Image search  Visually more relevant  Hitcount (Dice coeffient) Semantic Relatedness Measures CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | WordNet [Fellbaum, MIT press `98] WordNet [Fellbaum, MIT press `98] entityanimalmammalhorseelephantvehiclecarbike

12  WordNet  Lin measure [Budanitsky & Hirst, CL `06]  Wikipedia  Explicit Semantic Analysis [Gabrilovich & MarkovitchI, IJCAI `07]  Word Wide Web  Hitcount (Dice coeffient) [Kilgarriff & Grefenstette, CL `03]  Image search  Visually more relevant  Hitcount (Dice coeffient) Semantic Relatedness Measures CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | A farm is an area of lan the training of horses. A hoof is the tip of a toe Rear hooves of a horse Hoof Farm Tusks are long teeth, u Elephants and narwhals Tusk Articlehorseelephant Farm30 Hoof21 Tusk04 ……… A farm is an area of lan the training of horses. A hoof is the tip of a toe Rear hooves of a horse Most evem tped ungulat Hoof Farm Tusks are long teeth, u Elephants and narwhals Tusk

13  WordNet  Lin measure [Budanitsky & Hirst, CL `06]  Wikipedia  Explicit Semantic Analysis [Gabrilovich & MarkovitchI, IJCAI `07]  Word Wide Web  Hitcount (Dice coeffient) [Kilgarriff & Grefenstette, CL `03]  Image search  Visually more relevant  Hitcount (Dice coeffient) Semantic Relatedness Measures CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | A farm is an area of lan the training of horses. A hoof is the tip of a toe Rear hooves of a horse Hoof Farm Tusks are long teeth, u Elephants and narwhals Tusk Articlehorseelephant Farm30 Hoof21 Tusk04 ……… A farm is an area of lan the training of horses. A hoof is the tip of a toe Rear hooves of a horse Most evem tped ungulat Hoof Farm Tusks are long teeth, u Elephants and narwhals Tusk cosine

14  WordNet  Lin measure [Budanitsky & Hirst, CL `06]  Wikipedia  Explicit Semantic Analysis [Gabrilovich & MarkovitchI, IJCAI `07]  Word Wide Web  Hitcount (Dice coeffient) [Kilgarriff & Grefenstette, CL `03]  Image search  Visually more relevant  Hitcount (Dice coeffient) Semantic Relatedness Measures CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

15  WordNet  Lin measure [Budanitsky & Hirst, CL `06]  Wikipedia  Explicit Semantic Analysis [Gabrilovich & MarkovitchI, IJCAI `07]  Word Wide Web  Hitcount (Dice coeffient) [Kilgarriff & Grefenstette, CL `03]  Image search  Visually more relevant  Hitcount (Dice coeffient) Semantic Relatedness Measures CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | We watched a horse race yesterday. [..] Tomorrow we go in the zoo to look at the baby elephant. „the dance of the horse and elephant“ web searchimage search [ lahierophant/ /] Incidental co-occurence Terms refer to same entity (the image)

16  Models for visual knowledge transfer  Semantic relatedness measures  Evaluation  Attributes  Querying class-attribute associations  Mining attributes  Direct similarity  Attribute-based vs. direct similarity  Conclusion Outline CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

17  Animals with attributes dataset [Lampert et al., CVPR `09]  40 training, 10 test classes (disjoint)  ≈ images total  Downsampled to 92 training images per class  Manual associations to 85 attributes  Image classification  SVM: Histogram intersection kernel  Area under ROC curve (AUC) - chance level: 50%  Mean over all 10 test classes Experimental Setup CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

18 Performance of supervised approach CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

19 Querying: abbreviation agile Manual supervision: detailed description “having a high degree of physical coordination” Querying: abbreviation agile Manual supervision: detailed description “having a high degree of physical coordination”  Performance of queried association  Encouraging  Below manual supervision  Image search  Based on image related text  Wikipedia  Robust resource  Yahoo Web  Very noisy resource  WordNet  Path length poor indicator of class-attribute associations Querying class-attribute association CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

20  Performance of queried association  Encouraging  Below manual supervision  Image search (Yahoo Img, Flickr)  Based on image related text  Wikipedia  Robust resource (definition texts)  Yahoo Web  Very noisy resource  WordNet  Path length poor indicator of class-attribute associations Querying class-attribute association CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | the dance of the horse and elephant image search

21  Performance of queried association  Encouraging  Below manual supervision  Image search (Yahoo Img, Flickr)  Based on image related text  Wikipedia  Robust resource (definition text)  Yahoo Web  Very noisy resource  WordNet  Path length poor indicator of class-attribute associations Querying class-attribute association CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Noise: While he watched a horse race the leg of his chair broke. Noise: While he watched a horse race the leg of his chair broke.

22  Performance of queried association  Encouraging  Below manual supervision  Image search (Yahoo Img, Flickr)  Based on image related text  Wikipedia  Robust resource (definition text)  Yahoo Web  Very noisy resource  WordNet  Path length poor indicator of class-attribute associations Querying class-attribute association CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

23 Mining attributes CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Word Net semantic relatedness from language Attribute terms ocean spots … … Known training classes Unseen test classes Class-attribute associations white

24 Mining attributes CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Word Net semantic relatedness from language Attribute terms ? ? ? ? ? ? Known training classes Unseen test classes Class-attribute associations ? ?

25 Part attributes Leg of a dog Attribute classifiers Mining attributes CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Word Net semantic relatedness from language Known training classes Unseen test classes Class-attribute associations flipperlegpaw Word Net

26  Additional measure: Holonym patterns  Only part attributes  Hit Counts of Patterns [Berland & Charniak, ACL 1999]  “cow’s leg”  “leg of a cow”  Dice coefficient Mining attributes CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | While he watched a horse race the leg of his chair broke. Leg of the horse web searchholonym patterns Incidental co-occurence One term likely part of other term

27  Best: Yahoo Holonyms  Close to manual attributes  Tailored towards part attributes Mining attributes CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

28  Best: Yahoo Holonyms  Close to manual attributes  Tailored towards part attributes  Performance drop  Reduced diversity  Only part attributes  Specialized terms  E.g. pilus (=hair)  Coverage problem: Image search, Wikipedia Mining attributes CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

29  Models for visual knowledge transfer  Semantic relatedness measures  Evaluation  Attributes  Querying class-attribute associations  Mining attributes  Direct similarity  Attribute-based vs. direct similarity  Conclusion Outline CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

30 Direct similarity-based model CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Word Net semantic relatedness from language Unseen test classes most similar classes Known training classes Classifier per class polar bear killer whale Dalmatian

31  Nearly all very good  On par with manual supervision attribute model (black)  Clearly better than any mined attribute-associations result  Why?  Five most related classes  Ranking of semantic relatedness reliable  Similar between methods Direct Similarity CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

32 Attributes vs. direct similarity CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |  Extending the test set  Add images  From known classes  As negatives  More realistic setting  Results  Direct similarity drop in performance (orange curve)  Attribute models generalize well

33  Models for visual knowledge transfer  Semantic relatedness measures  Evaluation  Conclusion Outline CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

34  Supervision replaced with semantic relatedness  Direct similarity  better than attributes  on par with supervised approach  Attributes: generalizes better  Semantic relatedness measures  Overall best  Yahoo image with hit count  Holonym patterns for web search  Improvement  Limited to part attributes Conclusion CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

35  Supervision replaced with semantic relatedness  Direct similarity  better than attributes  on par with supervised approach  Attributes: generalize better  Semantic relatedness measures  Overall best  Yahoo image with hit count  Holonym patterns for web search  Improvement  Limited to part attributes Conclusion CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach |

36  Supervision replaced with semantic relatedness  Direct similarity  better than attributes  on par with supervised approach  Attributes: generalize better  Semantic relatedness measures  Overall best  Yahoo image with hit count  Holonym patterns for web search  Improvement  Limited to part attributes  WordNet poor for object-attributes associations Conclusion CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | patterns: dog’s leg leg of the dogs patterns: dog’s leg leg of the dogs

37 Further supervision for closing the semantic gap? See us at our poster (A2, Atrium)! CVPR 2010 | What Helps Where - And Why? Semantic Relatedness for Knowledge Transfer | Marcus Rohrbach | Knowledge Transfer Thank you! Software?