Multiscale PCA to distinguish regular and irregular surfaces using tri axial head and trunk acceleration signals

Gita Pendharkar, Ganesh R Naik, Amit Acharyya, Hung T Nguyen

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

3 Citations (Scopus)

Abstract

This study uses multiscale principal component analysis (MSPCA) signal processing technique in order to distinguish the two different surfaces, tiled (regular) and cobbled (irregular) using accelerometry data (recorded from MTx sensors). Two MTx sensors were placed on the head and trunk of the subject while the subject walked freely over the regular and irregular surfaces during a free walk. 3D acceleration signals, vertical, medio lateral (ML) and anterior-posterior (AP) were recorded for the head and trunk segments and compared for the free walk on a defined route. The magnitude of the ML and AP acceleration obtained from the MTx sensors (for both head trunk) was higher when walking over the irregular (cobbled) surface as compared to the regular (tiled) surface. The accelerometry data was initially analysed using MSPCA and was later classified using naive Bayesian classifier with >86 accuracy. This research study demonstrates that MSPCA can be used to distinguish the regular and irregular surfaces. The proposed method could be very useful as an automated method for classification of the two surfaces.
Original languageEnglish
Title of host publication2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2015)
EditorsJim Patton
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages4122 - 4125
Number of pages4
ISBN (Print)9781424492701
DOIs
Publication statusPublished - 2015
EventInternational Conference of the IEEE Engineering in Medicine and Biology Society 2015: Biomedical Engineering: A bridge to improve the quality of health care and the quality of life - MiCo - Milano Congressi Center, Milan, Italy
Duration: 25 Aug 201529 Aug 2015
Conference number: 37th
https://embc.embs.org/2015/

Conference

ConferenceInternational Conference of the IEEE Engineering in Medicine and Biology Society 2015
Abbreviated titleEMBC 2015
CountryItaly
CityMilan
Period25/08/1529/08/15
Other37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS). Our Annual Conference (known as EMBC) is a premier international conference in biomedical engineering, and has been strategically held in different locations around the world, including Chicago, Osaka, San Diego, Boston, Buenos Aires, Minneapolis, Vancouver, Lyon, New York, and Shanghai over the last 10 years.
Internet address

Cite this

Pendharkar, G., Naik, G. R., Acharyya, A., & Nguyen, H. T. (2015). Multiscale PCA to distinguish regular and irregular surfaces using tri axial head and trunk acceleration signals. In J. Patton (Ed.), 2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2015) (pp. 4122 - 4125). IEEE, Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/EMBC.2015.7319301