Type

Conference Proceedings

Authors

Cathal Gurrin
Heather J. Ruskin
Martin Crane
Na Li

Subjects

Computer Science

Topics
statistical physics maximum overlap discrete wavelet transform cross correlation lifelog images sensecam lifelogging equal time correlation matrices

Multiscaled cross-correlation dynamics on SenseCam lifelogged images (2013)

Abstract In this paper, we introduce and evaluate a novel approach, namely the use of the cross correlation matrix and Maximum Overlap Discrete Wavelet Transform (MODWT) to analyse SenseCam lifelog data streams. SenseCam is a device that can automatically record images and other data from the wearer’s whole day. It is a significant challenge to deconstruct a sizeable collection of images into meaningful events for users. The cross-correlation matrix was used, to characterise dynamical changes in non-stationary multivariate SenseCam images. MODWT was then applied to equal-time CorrelationMatrices over different time scales and used to explore the granularity of the largest Eigenvalue and changes,in the ratio of the sub-dominant Eigenvalue spectrum dynamics, over sliding time windows. By examination of the eigenspectrum, we show that these approaches can identify “Distinct Significant Events” for the wearers. The dynamics of the Eigenvalue spectrum across multiple scales provide useful insight on details of major events in SenseCam logged images.
Collections Ireland -> Dublin City University -> Publication Type = Conference or Workshop Item
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Engineering and Computing: School of Computing
Ireland -> Dublin City University -> Subject = Computer Science
Ireland -> Dublin City University -> Subject = Physical Sciences: Statistical physics
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools
Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> Subject = Computer Science: Lifelog
Ireland -> Dublin City University -> Subject = Physical Sciences
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Engineering and Computing

Full list of authors on original publication

Cathal Gurrin, Heather J. Ruskin, Martin Crane, Na Li

Experts in our system

1
Cathal Gurrin
Dublin City University
Total Publications: 182
 
2
Heather J. Ruskin
Dublin City University
Total Publications: 63
 
3
Martin Crane
Dublin City University
Total Publications: 47
 
4
Na Li
Dublin City University
Total Publications: 11