RECOD @ Placing Task of MediaEval 2016 A Ranking Fusion Approach for Geographic-Location Prediction of Multimedia Objects Javier A. V. Muoz 1 , Lin Tzy Li 1 , Ícaro C. Dourado 1 , Keiller Nogueira 5 , Samuel G. Fadel 1 , Otávio A. B. Penatti 1,2 , Jurandy Almeida 1,3 , Luís A. M. Pereira 1 , Rodrigo T. Calumby 1,4 , Jefersson A. dos Santos 5 , and Ricardo da S. Torres 1 1 RECOD Lab, Institute of Computing, University of Campinas (UNICAMP), Campinas – SP 2 Advanced Technologies, SAMSUNG Research Institute Brazil, Campinas – SP 3 Inst. of Science and Technology, Federal University of São Paulo (UNIFESP), S. J. dos Campos – SP 4 Dept. of Exact Sciences, University of Feira de Santana (UEFS), Feira de Santana – BA 5 Dept. of Computer Science, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte - MG Brazil
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RECOD @ Placing Task of MediaEval 2016
A Ranking Fusion Approach for Geographic-Location Prediction of
Multimedia Objects
Javier A. V. Munoz1, Lin Tzy Li1, Ícaro C. Dourado1, Keiller Nogueira5, Samuel G. Fadel1, Otávio A. B. Penatti1,2, Jurandy Almeida1,3, Luís A. M. Pereira1, Rodrigo T. Calumby1,4,
Jefersson A. dos Santos5, and Ricardo da S. Torres1
1RECOD Lab, Institute of Computing, University of Campinas (UNICAMP), Campinas – SP2Advanced Technologies, SAMSUNG Research Institute Brazil, Campinas – SP3Inst. of Science and Technology, Federal University of São Paulo (UNIFESP), S. J. dos Campos – SP4Dept. of Exact Sciences, University of Feira de Santana (UEFS), Feira de Santana – BA5Dept. of Computer Science, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte - MG
Brazil
GP-Agg
General Pipeline
Feature Extractor 1 Ranked List 1
Ranking
Feature Extractor 2 Ranked List 2
Feature Extractor m Ranked List m
RLDA
Rank Fusion
ID1 LAT1 LONG1ID2 LAT2 LONG2… … ...IDX LATX LONGX
Final Ranked List
Ranked list 1~m
ID1 LAT1 LONG1ID2 LAT2 LONG2… … ...IDX LATX LONGX
Top X items' lat/long defined as points of a OPF cluster
v: (lat1,long1)
edge (v, u): connect k-nn d(v, u)
d(v, u): geo-distance between v and u
k=3
u: (lat2,long2)
RLDA: Ranked List Density Analysis Based on OPF (Optimum-Path Forest): find the maximum point in a probability density function
GP-Agg Framework
Training Phase
● RLDA is included in set of rank aggregation functions● RLDA is the unique function that uses geographical location in the combination