Type

Book Chapter

Authors

Ferran Marques
Noel E. O'Connor
Xavier Giro-i-Nieto
Kevin McGuinness
Amaia Salvador
Eva Mohedano

Subjects

Computer Science

Topics
digital video information storage and retrieval artificial intelligence deep learning information retrieval image processing and computer vision multimedia systems content analysis and indexing bag of words feature representation convolutional neural networks

Object retrieval with deep convolutional features (2017)

Abstract Image representations extracted from convolutional neural networks (CNNs) outdo hand-crafted features in several computer vision tasks, such as visual image retrieval. This chapter recommends a simple pipeline for encoding the local activations of a convolutional layer of a pre- trained CNN utilizing the well-known Bag of Words (BoW) aggregation scheme and called bag of local convolutional features (BLCF). Matching each local array of activations in a convolutional layer to a visual word results in an assignment map, which is a compact representation relating regions of an image with a visual word. We use the assignment map for fast spatial reranking, finding object localizations that are used for query expansion. We show the suitability of the BoW representation based on local CNN features for image retrieval, attaining state-of-the- art performance on the Oxford and Paris buildings benchmarks. We demonstrate that the BLCF system outperforms the latest procedures using sum pooling for a subgroup of the challenging TRECVid INS benchmark according to the mean Average Precision (mAP) metric.
Collections Ireland -> Dublin City University -> Publication Type = Book Section
Ireland -> Dublin City University -> Subject = Computer Science: Artificial intelligence
Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> Subject = Computer Science: Multimedia systems
Ireland -> Dublin City University -> Subject = Computer Science: Information retrieval
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Engineering and Computing: School of Electronic Engineering
Ireland -> Dublin City University -> Subject = Computer Science: Digital video
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres: INSIGHT Centre for Data Analytics

Full list of authors on original publication

Ferran Marques, Noel E. O'Connor, Xavier Giro-i-Nieto, Kevin McGuinness, Amaia Salvador, Eva Mohedano

Experts in our system

1
Ferran Marques
Dublin City University
Total Publications: 3
 
2
Noel E. O'Connor
Dublin City University
Total Publications: 420
 
3
Xavier Giro-i-Nieto
Dublin City University
Total Publications: 8
 
4
Kevin McGuinness
Dublin City University
Total Publications: 65
 
5
Amaia Salvador
Dublin City University
Total Publications: 4
 
6
Eva Mohedano
Dublin City University
Total Publications: 10