Fusion of Audio-visual Features using Hierarchical Classifier Systems for the Recognition of Affective States and the State of Depression

Markus Kächele, Michael Glodek, Dimitrij Zharkov, Sascha Meudt, Friedhelm Schwenker

Abstract

Reliable prediction of affective states in real world scenarios is very challenging and a significant amount of ongoing research is targeted towards improvement of existing systems. Major problems include the unreliability of labels, variations of the same affective states amongst different persons and in different modalities as well as the presence of sensor noise in the signals. This work presents a framework for adaptive fusion of input modalities incorporating variable degrees of certainty on different levels. Using a strategy that starts with ensembles of weak learners, gradually, level by level, the discriminative power of the system is improved by adaptively weighting favorable decisions, while concurrently dismissing unfavorable ones. For the final decision fusion the proposed system leverages a trained Kalman filter. Besides its ability to deal with missing and uncertain values, in its nature, the Kalman filter is a time series predictor and thus a suitable choice to match input signals to a reference time series in the form of ground truth labels. In the case of affect recognition, the proposed system exhibits superior performance in comparison to competing systems on the analysed dataset.

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Paper Citation


in Harvard Style

Kächele M., Glodek M., Zharkov D., Meudt S. and Schwenker F. (2014). Fusion of Audio-visual Features using Hierarchical Classifier Systems for the Recognition of Affective States and the State of Depression . In Proceedings of the 3rd International Conference on Pattern Recognition Applications and Methods - Volume 1: ICPRAM, ISBN 978-989-758-018-5, pages 671-678. DOI: 10.5220/0004828606710678


in Bibtex Style

@conference{icpram14,
author={Markus Kächele and Michael Glodek and Dimitrij Zharkov and Sascha Meudt and Friedhelm Schwenker},
title={Fusion of Audio-visual Features using Hierarchical Classifier Systems for the Recognition of Affective States and the State of Depression},
booktitle={Proceedings of the 3rd International Conference on Pattern Recognition Applications and Methods - Volume 1: ICPRAM,},
year={2014},
pages={671-678},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004828606710678},
isbn={978-989-758-018-5},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 3rd International Conference on Pattern Recognition Applications and Methods - Volume 1: ICPRAM,
TI - Fusion of Audio-visual Features using Hierarchical Classifier Systems for the Recognition of Affective States and the State of Depression
SN - 978-989-758-018-5
AU - Kächele M.
AU - Glodek M.
AU - Zharkov D.
AU - Meudt S.
AU - Schwenker F.
PY - 2014
SP - 671
EP - 678
DO - 10.5220/0004828606710678