AdaBoost.MRF: Boosted Markov Random Forests and Application to Multilevel Activity Recognition
MetadataShow full item record
Activity recognition is an important issue in building intelligent monitoring systems. We address the recognition of multilevel activities in this paper via a conditional Markov random field (MRF), known as the dynamic conditional random field (DCRF). Parameter estimation in general MRFs using maximum likelihood is known to be computationally challenging (except for extreme cases), and thus we propose an efficient boosting-based algorithm AdaBoost.MRF for this task. Distinct from most existing work, our algorithm can handle hidden variables (missing labels) and is particularly attractive for smarthouse domains where reliable labels are often sparsely observed. Furthermore, our method works exclusively on trees and thus is guaranteed to converge. We apply the AdaBoost.MRF algorithmto a home video surveillance application and demonstrate its efficacy.
Showing items related by title, author, creator and subject.
Ren, D.; Qu, F.; Lv, K.; Zhang, Z.; Xu, Honglei; Wang, X. (2015)When the technique of boosting regression is applied to near-infrared spectroscopy, the full spectrum of samples are generally used to perform partial least squares (PLS) modeling. However, there is a large amount of ...
Hatfield, M.; Murray, N.; Ciccarelli, M.; Falkmer, Torbjorn; Falkmer, M. (2017)© 2017 Occupational Therapy Australia. Background: Many adolescents with autism face difficulties with the transition from high school into post-school activities. The Better OutcOmes & Successful Transitions for Autism ...
A general approach to control a Positive Buck-Boost converter to achieve robustness against input voltage fluctuations and load changesBoora, A.; zare, F.; Ledwich, G.; Ghosh, Arindam (2008)A positive buck-boost converter is a known DC- DC converter which may be controlled to act as buck or boost converter with same polarity of the input voltage. This converter has four switching states which include all the ...