Search results for "Maximum-entropy Markov model"

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Gesture Modeling by Hanklet-Based Hidden Markov Model

2015

In this paper we propose a novel approach for gesture modeling. We aim at decomposing a gesture into sub-trajectories that are the output of a sequence of atomic linear time invariant (LTI) systems, and we use a Hidden Markov Model to model the transitions from the LTI system to another. For this purpose, we represent the human body motion in a temporal window as a set of body joint trajectories that we assume are the output of an LTI system. We describe the set of trajectories in a temporal window by the corresponding Hankel matrix (Hanklet), which embeds the observability matrix of the LTI system that produced it. We train a set of HMMs (one for each gesture class) with a discriminative a…

Conditional random fieldKinectbusiness.industryComputer scienceMaximum-entropy Markov modelAction ClassificationHankel matrixMarkov modelHidden Markov ModelLTI system theoryGestureAction RecognitionGesture recognitionObservabilityArtificial intelligencebusinessHidden Markov modelAlgorithmHankel matrixSkeleton
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Human Activity Recognition Process Using 3-D Posture Data

2015

In this paper, we present a method for recognizing human activities using information sensed by an RGB-D camera, namely the Microsoft Kinect. Our approach is based on the estimation of some relevant joints of the human body by means of the Kinect; three different machine learning techniques, i.e., K-means clustering, support vector machines, and hidden Markov models, are combined to detect the postures involved while performing an activity, to classify them, and to model each activity as a spatiotemporal evolution of known postures. Experiments were performed on Kinect Activity Recognition Dataset, a new dataset, and on CAD-60, a public dataset. Experimental results show that our solution o…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniImage fusionMarkov chainComputer Networks and CommunicationsComputer sciencebusiness.industryMaximum-entropy Markov modelFeature extractionComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONHuman Factors and ErgonomicsPattern recognitionComputer Science ApplicationsHuman-Computer InteractionActivity recognitionSupport vector machineHuman activity recognition kinect ambient intelligenceArtificial IntelligenceControl and Systems EngineeringSignal ProcessingComputer visionArtificial intelligenceCluster analysisHidden Markov modelbusinessIEEE Transactions on Human-Machine Systems
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