Towards Human Activity Recognition: A Hierarchical Feature Selection Framework
學年 107
學期 1
出版（發表）日期 2018-10-25
作品名稱 Towards Human Activity Recognition: A Hierarchical Feature Selection Framework
作品名稱（其他語言）
著者 Aiguo Wang; Guilin Chen; Xi Wu; Li Liu; Ning An; Chih-Yung Chang
單位
出版者
著錄名稱、卷期、頁數 Sensors 18(11), 3629
摘要 The inherent complexity of human physical activities makes it difficult to accurately recognize activities with wearable sensors. To this end, this paper proposes a hierarchical activity recognition framework and two different feature selection methods to improve the recognition performance. Specifically, according to the characteristics of human activities, predefined activities of interest are organized into a hierarchical tree structure, where each internal node represents different groups of activities and each leaf node represents a specific activity label. Then, the proposed feature selection methods are appropriately integrated to optimize the feature space of each node. Finally, we train corresponding classifiers to distinguish different activity groups and to classify a new unseen sample into one of the leaf-nodes in a top-down fashion to predict its activity label. To evaluate the performance of the proposed framework and feature selection methods, we conduct extensive comparative experiments on publicly available datasets and analyze the model complexity. Experimental results show that the proposed method reduces the dimensionality of original feature space and contributes to enhancement of the overall recognition accuracy. In addition, for feature selection, returning multiple activity-specific feature subsets generally outperforms the case of returning a common subset of features for all activities.
關鍵字 activity recognition;hierarchical model;feature selection;information infusion
語言 zh_TW
ISSN 1424-8220
期刊性質 國內
收錄於 SCI
產學合作
通訊作者 Chih-Yung Chang
審稿制度 否
國別 TWN
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/115920 )