Histograms of oriented optical flow and binet-cauchy kernels on nonlinear dynamical systems for the recognition of human actions

R Chaudhry, A Ravichandran… - 2009 IEEE conference …, 2009 - ieeexplore.ieee.org
System theoretic approaches to action recognition model the dynamics of a scene with
linear dynamical systems (LDSs) and perform classification using metrics on the space of …

Bio-inspired dynamic 3d discriminative skeletal features for human action recognition

R Chaudhry, F Ofli, G Kurillo, R Bajcsy… - Proceedings of the …, 2013 - cv-foundation.org
Over the last few years, with the immense popularity of the Kinect, there has been renewed
interest in developing methods for human gesture and action recognition from 3D data. A …

Surgical gesture classification from video and kinematic data

L Zappella, B Béjar, G Hager, R Vidal - Medical image analysis, 2013 - Elsevier
Much of the existing work on automatic classification of gestures and skill in robotic surgery
is based on dynamic cues (eg, time to completion, speed, forces, torque) or kinematic data …

Surgical motion analysis using discriminative interpretable patterns

G Forestier, F Petitjean, P Senin, F Despinoy… - Artificial intelligence in …, 2018 - Elsevier
Objective The analysis of surgical motion has received a growing interest with the
development of devices allowing their automatic capture. In this context, the use of …

[HTML][HTML] A framework for analysis of linear ultrasound videos to detect fetal presentation and heartbeat

MA Maraci, CP Bridge, R Napolitano… - Medical image …, 2017 - Elsevier
Confirmation of pregnancy viability (presence of fetal cardiac activity) and diagnosis of fetal
presentation (head or buttock in the maternal pelvis) are the first essential components of …

Surgical gesture classification from video data

B Béjar Haro, L Zappella, R Vidal - … Conference, Nice, France, October 1-5 …, 2012 - Springer
Much of the existing work on automatic classification of gestures and skill in robotic surgery
is based on kinematic and dynamic cues, such as time to completion, speed, forces, torque …

Group action induced distances for averaging and clustering linear dynamical systems with applications to the analysis of dynamic scenes

B Afsari, R Chaudhry, A Ravichandran… - 2012 IEEE Conference …, 2012 - ieeexplore.ieee.org
We introduce a framework for defining a distance on the (non-Euclidean) space of Linear
Dynamical Systems (LDSs). The proposed distance is induced by the action of the group of …

Dynamic template tracking and recognition

R Chaudhry, G Hager, R Vidal - International journal of computer vision, 2013 - Springer
In this paper we address the problem of tracking non-rigid objects whose local appearance
and motion changes as a function of time. This class of objects includes dynamic textures …

Distances on spaces of high-dimensional linear stochastic processes: A survey

B Afsari, R Vidal - Geometric Theory of Information, 2014 - Springer
In this paper we study the geometrization of certain spaces of stochastic processes. Our
main motivation comes from the problem of pattern recognition in high-dimensional time …

Optimal and suboptimal micro-Doppler estimation schemes using carrier diverse Doppler radars

P Setlur, M Amin, F Ahmad - 2009 IEEE International …, 2009 - ieeexplore.ieee.org
Carrier diverse radars employing two different frequencies, termed as dual-frequency
radars, prove effective in determining the target range in urban sensing and through-the-wall …