Smart Annotation using semi-supervised techniques

Internally funded project

Project Details

Project leader:
Prof. Dr. Björn Eskofier

Project members:
Christine Martindale

Contributing FAU Organisations:
Lehrstuhl für Informatik 14 (Maschinelles Lernen und Datenanalytik)

Acronym: SmartAnnotation
Start date: 01/02/2015
End date: 30/01/2019

Research Fields

Machine Learning and Data Analytics
Lehrstuhl für Informatik 14 (Maschinelles Lernen und Datenanalytik)

Abstract (technical / expert description):

Objective health data about subjects outside of the laboratory is important in order to analyse symptoms that cannot be reproduced in the laboratory. A simple daily life example would be how stride length changes with tiredness or stress. In order to investigate this we must be able to accurately segment a stride from daily living data in order to have an accurate measure of duration and distance. State-of-the-art methods use separate segmentation and classification approaches. This is inaccurate for segmentation of an isolated activity, especially one that is not repeated. This could be solved using a model that is based on the sequence of phases within activities. Such a model is a graphical model. Currently we are working with Conditional Random Fields and Hierarchical Hidden Markov Models on daily living data. The applications will include sports as well as daily living activities.


Martindale, C., Hönig, F., Strohrmann, C., & Eskofier, B. (2017). Smart Annotation of Cyclic Data Using Hierarchical Hidden Markov Models. Sensors, 17(10).
Martindale, C., Wirth, M., Schneegas, S., Zrenner, M., Groh, B., Blank, P.,... Eskofier, B. (2016). Workshop on wearables for sports. In 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing. Heidelberg, DE.

Last updated on 2018-19-02 at 14:03