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A Multimodal Tensor-Based Late Fusion Approach for Satellite Image Search in Sentinel 2 Images

Authors: Ilias Gialampoukidis; Anastasia Moumtzidou; Marios Bakratsas; Stefanos Vrochidis; Ioannis Kompatsiaris;

A Multimodal Tensor-Based Late Fusion Approach for Satellite Image Search in Sentinel 2 Images

Abstract

Earth Observation (EO) Big Data Collections are acquired at large volumes and variety, due to their high heterogeneous nature. The multimodal character of EO Big Data requires eective combination of multiple modalities for similarity search. We propose a late fusion mechanism of multiple rankings to combine the results from several uni-modal searches in Sentinel 2 image collections. We st create a K-order tensor from the results of separate searches by visual features, concepts, spatial and temporal information. Visual concepts and features are based on a vector representation from Deep Convolutional Neural Networks. 2D-surfaces of the K-order tensor initially provide candidate retrieved results per ranking position and are merged to obtain the nal list of retrieved results. Satellite image patches are used as queries in order to retrieve the most relevant image patches in Sentinel 2 images. Quantitative and qualitative results show that the proposed method outperforms search by a single modality and other late fusion methods.

Keywords

Multimodal search, Sentinel 2 images, Late fusion

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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