title: Weakly Supervised Recognition of Daily Life Activities with Wearable Sensors.
abstract: This paper considers scalable and unobtrusive activity recognition using on-body sensing for context awareness in wearable computing. Common methods for activity recognition rely on supervised learning requiring substantial amounts of labeled training data. Obtaining accurate and detailed annotations of activities is challenging, preventing the applicability of these approaches in real-world settings. This paper proposes new annotation strategies that substantially reduce the required amount of annotation. We explore two learning schemes for activity recognition that effectively leverage such sparsely labeled data together with more easily obtainable unlabeled data. Experimental results on two public data sets indicate that both approaches obtain results close to fully supervised techniques. The proposed methods are robust to the presence of erroneous labels occurring in real-world annotation data.
authors.forename: Maja
authors.initials: M
authors.lastname: Stikic
authors.forename: Diane
authors.initials: D
authors.lastname: Larlus
authors.forename: Sandra
authors.initials: S
authors.lastname: Ebert
authors.forename: Bernt
authors.initials: B
authors.lastname: Schiele
mesh_terms: D000203:Activities of Daily Living; D000465:Algorithms; D016208:Databases, Factual; D006801:Humans; D018670:Monitoring, Ambulatory / Q000706:statistics & numerical data*; D009043:Motor Activity; D000069553:Supervised Machine Learning; D060388:Support Vector Machine