Assessing similarity models for human‐motion retrieval applications. (24th August 2015)

• Record Type: Journal Article
• Authors: Valcik, Jakub; Sedmidubsky, Jan; Zezula, Pavel
• Is Part Of: Computer animation and virtual worlds. Volume 27:Number 5(2016:Sep./Oct.)
• Page Start: 484
• Page End: 500
• Publication Date: 2015-08-24
• Subjects: human‐motion retrieval -- similarity model -- effectiveness evaluation -- motion capture data -- action recognition; Computer animation -- Periodicals; Visualization -- Periodicals; 006.6
• DOI: 10.1002/cav.1674
• Languages: English
• ISSNs: 1546-4261

Abstract

Abstract: The development of motion capturing devices poses new challenges in the exploitation of human‐motion data for various application fields, such as computer animation, visual surveillance, sports, or physical medicine. Recently, a number of approaches dealing with motion data have been proposed, suggesting characteristic motion features to be extracted and compared on the basis of similarity. Unfortunately, almost each approach defines its own set of motion features and comparison methods; thus, it is hard to fairly decide which similarity model is the most suitable for a given kind of human‐motion retrieval application. To cope with this problem, we propose the human motion model evaluator, which is a generic framework for assessing candidate similarity models with respect to the purpose of the target application. The application purpose is specified by a user in form of a representative sample of categorized motion data. Respecting such categorization, the similarity models are assessed from the effectiveness and efficiency points of view using a set of space‐complexity, information‐retrieval, and performance measures. The usability of the framework is demonstrated by case studies of three practical examples of retrieval applications focusing on recognition of actions, detection of similar events, and identification of subjects. Copyright © 2015 John Wiley & Sons, Ltd. Abstract : Processing motion capture data requires an effective similarity model to extract suitable motion features along with their comparison method. However, it is hard to define the most appropriate model for the specific application. We try to solve this problem by proposing a generic framework (HAMMER) that assesses candidate similarity models on the basis of ground‐truth data provided for the specific application.