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Tieniu Tan - One of the best experts on this subject based on the ideXlab platform.
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recent developments in human Motion Analysis
Pattern Recognition, 2003Co-Authors: Liang Wang, Tieniu TanAbstract:Visual Analysis of human Motion is currently one of the most active research topics in computer vision. This strong interest is driven by a wide spectrum of promising applications in many areas such as virtual reality, smart surveillance, perceptual interface, etc. Human Motion Analysis concerns the detection, tracking and recognition of people, and more generally, the understanding of human behaviors, from image sequences involving humans. This paper provides a comprehensive survey of research on computer-vision-based human Motion Analysis. The emphasis is on three major issues involved in a general human Motion Analysis system, namely human detection, tracking and activity understanding. Various methods for each issue are discussed in order to examine the state of the art. Finally, some research challenges and future directions are discussed.
Gerald F Harris - One of the best experts on this subject based on the ideXlab platform.
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quantitative Motion Analysis in patients with hallux rigidus before and after cheilectomy
Journal of Orthopaedic Research, 2009Co-Authors: Karl Canseco, Jason T Long, Richard M Marks, Michael S Khazzam, Gerald F HarrisAbstract:The purpose of this study was to quantify changes in temporal-spatial parameters and multisegmental foot/ankle kinematics in a group of patients with hallux rigidus following cheilectomy. Three-dimensional Motion Analysis was conducted using a 15-camera Vicon Motion Analysis System on a population of 19 patients who underwent cheilectomy for hallux rigidus. Data were analyzed using the four-segment Milwaukee Foot Model. Preoperative and postoperative tests were compared using paired parametric methods. Results showed significant improvements in walking speed, cadence, stride length, and stance/swing ratio from preoperative to postoperative state. Altered hallux and forefoot positions preoperatively showed shifts towards normal after cheilectomy. Although clinical improvements in pain and passive range of Motion were statistically significant, similar improvements in range of Motion were not demonstrated during ambulatory testing. The results of this study provide insight into ambulatory improvements following cheilectomy, and suggest further study of the rehabilitation process to improve the recovery of functional range of Motion. © 2008 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 27:128–134, 2009
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Foot and Ankle Motion Analysis: Clinical Treatment and Technology
2007Co-Authors: Richard M Marks, Gerald F Harris, Peter A. SmithAbstract:Foot and Ankle Motion Analysis: Evolutionary Perspectives and Introduction, G.F. Harris and M.D. Jenders Historical Perspective Introduction to the Text Part 1: Clinical Applications and Opportunities Section A Pediatric Foot and Ankle Clinical Applications of Foot and Ankle Motion Analysis in Children, P.A. Smith, S.Hassani, A.N. Graf, and G.F. Harris Gait Analysis Foot Motion Biomechanical Models Normal Foot and Ankle Motion Clinical Challenges Cerebral Palsy Equinus Foot Deformities Planovalgus Foot Deformities Varus Foot Deformities Congenital Clubfoot Other Neuromuscular Foot Deformities Severe Flatfoot Tarsal Coalition Functional Gait Analysis in Children Following Clubfoot Releases, M.Khazzam, J.Y. Roh, J.T. Long, P.A. Smith, S.Hassani, G.F. Harris, A.N. Graf, and K.N. Kuo Congenital Clubfoot Pathoanatomy Etiology Clinical Assessment Radiographic Examination Treatment Options Gait Analysis for Assessment of Outcome Following Clubfoot Correction Results of Lower Body Gait Analysis Dynamic Plantar Pressure Characteristics and Clinical Applications in Patients with Residual Clubfoot, X.C. Liu and J.Thometz Three Dimensional MRI Modeling of Normal and Surgically Treated Clubfeet, V.Talwalkar, C.Tylkowski, C.Roche, B. Mattingly, P.A. Hardy, and D. Pienkowski Dynamic Foot Pressure in the Early Evolution of Foot Deformities in Children with Spastic Cerebral Palsy, C. Church, N. Lennon, S. Coleman, J. Henley, M. Nagai, and F. Miller Plantar Pressure Based Quantitative Assessment of Subtalar Arthrodesis in the Rehabilitation of the Planovalgus Foot Deformity, Z.O. Abu-Faraj, G.F. Harris, and P.A. Seith Plantar Pressures: A Clinical Background Cerebral Palsy and the Planovalgus Foot Materials and Methods Chemodenervation and Motion Assessment, S. Sienko Thomas and J.D. Ackman Botulinum Toxin Type A Mouse Models of Spasticity Children with Cerebral Palsy Assessment of the Efficacy of Botulinum Toxin Type A Musculoskeletal Modeling Case Studies Equinovarus Foot: EMG Analysis and Clinical Outcome, M. Aiona, R. Dorociak, M. Nichols, and R. Pierce Normal Anatomy/Kinesiology of Foot and Ankle Equinovarus Foot Pathomechanics Clinical Implications of Equinovarus Foot EMG Assessment of Equinovarus Foot Study Study Population Methods Results Comparisons with Current Literature and Indications for Surgery Discussion Lower Extremity Characterization of Walker Assisted Gait in Children with Spastic Diplegic Cerebral Palsy, K.M. Baker, L. Lu, S.S. Klos, K. Reiners, J.D. Ackman, J. Klein, J.P. Schwab, and G.F. Harris Response to Balance Perturbation : A Strategy for Pediatric Assessment, A. Graf, J. Krzak, and G.F. Harris Section B Adult Foot and Ankle Gait Analysis in Posterior Tendon Dysfunction: Pre and Postoperative Analysis Compared to a Normal Population, R.M. Marks, J.T. Long, and G.F. Harris Posterior Tibial Tendon Anatomy and Biomechanics Posterior Tibial Tendon Dysfunction Classification Treatment Options for PTTD Current Investigation of PTTD Gait Hallux Valgus: A Pre and Postoperative Analysis of Gait, A. Gottstein Frea, J. T. Long, M. Khazzam, R.M. Marks, and G.F. Harris Anatomy Pathoanatomy Clinical Presentation Treatment Previous Studies Tibia Hindfoot Forefoot Hallux Case Examples Hallux Rigidus: A Pre and Postoperative Analysis of Gait, J. Schwab, M.Khazzam, J.T. Long, R.M. Marks, and G.F. Harris Anatomy and Pathology Etiology Clinical Presentation and Evaluation Treatment Previous Motion Analysis Studies Case Examples Pre-Operative and Post-Operative Gait Analysis of the Rheumatoid Forefoot, K. Maskala, J.T. Long, R.M. Marks, and G.F. Harras Background and Significance Treatment Critical Studies Test Methods Results Discussion Foot and Ankle Motion Analysis of Patients with Ankle Arthritis, M. Khazzam, J.T. Long, R.M. Marks, and G.F. Harris Ankle Anatomy and Biomechanics Ankle Arthritis Clinical Assessment Treatment Conclusion Gait Analysis After Total Ankle Arthroplasty, J.W. Brodsky, F.E. Pollo, and B.S. Baum Materials and Methods Surgical Procedure Gait Analysis Gait Analysis Results Discussion Dynamic Poly-EMG in Gait Analysis for the Assessment of Equinovarus Foot, A. Esquenazi The Challenge of the Diabetic Foot, M.S. Pinzur The Problem and the Challenge The Normal Adult Foot Pathophysiology of Diabetic Foot Ulcers Prevention of Diabetic Foot Ulcers The Challenge of the Diabetic Foot The Biomechanics of the Diabetic Foot, W. Ledoux Etiology of Diabetic Neuropathic Ulceration The Effect of Diabetes on Soft Tissue Characteristics The Effect of Diabetes on the Kinematics and Kinetics of Gait The Effect of Diabetes on Foot Deformities The Relationship between Foot Structure and Plantar Pressure The Relationship between Foot Structure and Ulceration The Relationship between Plantar Pressure and Ulceration The Relationship between Shear Stress and Ulceration Three-Dimensional Finite Element Analysis of the Fifth Metatarsal Jones Fracture, E.S. Rohr, J.E. Johnson, L. Zhao, and G. F. Harris Part 2: Technical Developments and Emerging Opportunities Section C Foot and Ankle Modeling A System for the Analysis of Foot and Ankle Kinematics During Gait, S.M. Kidder, F.S. Abuzzahab, G.F. Harris, and J.E. Johnson Validation of a Multi-Segment Foot and Ankle Kinematic Model for Pediatric Gait, K.A. Myers, M. Wang, R.M. Marks, and G.F. Harris Measurement of Foot Kinematics and Plantar Pressure in Children Using the Oxford Foot Model, J. Stebbins, M. Harrington, T. Theologis, N.Thompson, C. Giacomozzi, and V. Macellari The Design, Development, and Initial Evaluation of a Multi-Segment Foot Model for Routine Clinical Gait Analysis, R.B. Davis, E.G. Jameson, J.R. Davids, L.M. Christopher, B.M. Rogozinski, and J.P. Anderson Foot Model / Analysis - Clinical Requirements Currently Available Multi-Segment Foot Models Shriners Hospitals for Children Greenville Foot Model Reliability of a Clinically Practical Multi-Segment Foot Marker Set / Model, J. Henley, J. Richards, D. Hudson, C. Church, S. Coleman, L . Kersetter, and F. Miller A Multi-Segment, 3D Kinematic Model of the Foot and Ankle, K.R. Kaufman, H.P. Kitaoka, D.K. Hansen, D.A. Morrow, and B.R. Kotajarvi A Spatial Linkage Model of the Ankle Complex, D. Marinkovich Multi-Segment Foot Biomechanics in Dynamic Hindfoot Varus, M.R. Walker, F.L. Buczek, K.M. Cooney, N.A. Sharkey, and J.O. Sanders Future Directions Section D Technical Advances in Foot and Ankle Motion Analysis The Accuracy and Utility of Virtual Markers, M.H. Schwartz and A. Rozumalski Accuracy Virtual Shapes Discussion Determination of Subject-Specific Ankle Joint Axes from Measured Foot Motion, S.J. Piazza and G.S. Lewis Optimization-Based Location of Two Axes "Subtalar Isolation" Method for Subtalar Joint Location Discussion Conclusion Dynamic Radiographic Measurement of 3D Skeletal Motion, J.D. Yamokoski and S.A. Banks State of the Art Application to the Ankle Joint System The Future of Dynamic Radiographic Measurements Exploring the Frontiers of in vivo Multi-Body Ankle Dynamics Using Fast-PC MRI, F.T. Sheehan, A.R. Seisler, and K.L. Siegel Kinetic Measures of the Foot: Overcoming Current Obstacles, B. MacWilliams Tri-Axial Plantar Force Sensor: Design, Calibration, Characterization, and Subject Testing, E.J. Miller, D.C. Jeutter, R.J. Stango, and G.F. Harris Quasi-Stiffness of the Ankle During Able-Bodied Walking at Different Speeds: Implications for Design of Prostheses, A.H. Hansen, S.A. Gard, and D.S. Childress Development of an Advanced Biofidelic Lower Extremity Prosthesis, M. White, B.J. Hafner, and W.J. Whatley Establishing Design Parameters Tension Band Design Robotic Technology in Gait Simulation and Foot Mechanics, J.C. Otis Methodology Dynamic Cadaver Modeling Robotic Technology Section E Research Support Support for Rehabilitation Research on Foot and Ankle Motion Analysis, L.A. Quatrano and H. Khan The National Institutes of Health (NIH) Discussion Index
Liang Wang - One of the best experts on this subject based on the ideXlab platform.
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A Survey on Human Motion Analysis from Depth Data
Time-of-Flight and Depth Imaging. Sensors Algorithms and Applications. Lecture Notes in Computer Science, 2013Co-Authors: M Yel, Q Zhangl, Jiejie Zhu, Liang Wang, R YanglAbstract:Human pose estimation has been actively studied for decades. While traditional approaches rely on 2d data like images or videos, the development of Time-of-Flight cameras and other depth sensors created new opportunities to advance the field. We give an overview of recent approaches that perform human Motion Analysis which includes depth-based and skeleton-based activity recognition, head pose estimation, facial feature detection, facial performance capture, hand pose estimation and hand gesture recognition. While the focus is on approaches using depth data, we also discuss traditional image based methods to provide a broad overview of recent developments in these areas.
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recent developments in human Motion Analysis
Pattern Recognition, 2003Co-Authors: Liang Wang, Tieniu TanAbstract:Visual Analysis of human Motion is currently one of the most active research topics in computer vision. This strong interest is driven by a wide spectrum of promising applications in many areas such as virtual reality, smart surveillance, perceptual interface, etc. Human Motion Analysis concerns the detection, tracking and recognition of people, and more generally, the understanding of human behaviors, from image sequences involving humans. This paper provides a comprehensive survey of research on computer-vision-based human Motion Analysis. The emphasis is on three major issues involved in a general human Motion Analysis system, namely human detection, tracking and activity understanding. Various methods for each issue are discussed in order to examine the state of the art. Finally, some research challenges and future directions are discussed.
M Hamady - One of the best experts on this subject based on the ideXlab platform.
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a pilot study of video Motion Analysis in endovascular surgery development of real time discriminatory skill metrics
European Journal of Vascular and Endovascular Surgery, 2013Co-Authors: Alexander Rolls, Celia V Riga, Colin Bicknell, Danail Stoyanov, C Shah, I Van Herzeele, M HamadyAbstract:Objectives Accurate assessment and credentialing of physicians is essential. Objective Motion Analysis of guide-wire/catheter manipulation to assess proficiency during endovascular interventions remains unexplored. This study aims to assess its feasibility and its role in evaluation of technical ability. Materials and methods A semi-automated catheter-tracking software was developed which allows for frame-by-frame Motion Analysis of fluoroscopic videos and calculation 2D catheter tip path-length. 21 interventionalists (6 cardiologists, 8 interventional radiologists, 7 vascular surgeons; 14/21 had performed >500 endovascular procedures) performed an identical carotid artery stenting procedure (CAS) on a VIST simulator (Mentice, Gothenburg, Sweden). Operators were sub-divided into four categories according to CAS experience: 6 inexperienced (0 CAS-group A), 3 low-volume (1–20 CAS-group B), 5 moderate-volume (21–50 CAS-group C) and 7 high-volume (>50 CAS-group D) CAS experience. Total PL was calculated for each case and comparisons made between groups. PL was correlated with: quantitative, simulator-derived metrics and qualitative performance scores (generic and procedure-specific) derived from post-hoc video Analysis by three blinded observers. Results Group D used 5160.3 (inter-quartile range- IQR 4046.4–7142.9) pixels of movement, compared to 6856.7 (5914.4–8106.9) for group A ( p = 0.046); 10,905.1 (7851.1–14,381.5) for group B ( p = 0.017); and 9482.6 (8663.5–13,847.6) for group C ( p = 0.003). Statistically significant inverse correlations were seen between total PL and qualitative performance scores (rho = −0.519 for generic ( p = 0.027) rho = −0.567 for procedure-specific ( p = 0.014) scores). PL did not correlate with any of the simulator-derived metrics (errors, contrast volume, total procedure and fluoroscopy times, cine-loops used). Conclusion Endovascular instrument video Motion Analysis is feasible and may represent a valuable tool for the objective assessment of endovascular skill.
Maria Lindén - One of the best experts on this subject based on the ideXlab platform.
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Signal quality improvement algorithms for MEMS gyroscope-based human Motion Analysis systems: A systematic review
Sensors (Switzerland), 2018Co-Authors: Jiaying Du, Christer Gerdtman, Maria LindénAbstract:Motion sensors such as MEMS gyroscopes and accelerometers are characterized by a small size, light weight, high sensitivity, and low cost. They are used in an increasing number of applications. However, they are easily influenced by environmental effects such as temperature change, shock, and vibration. Thus, signal processing is essential for minimizing errors and improving signal quality and system stability. The aim of this work is to investigate and present a systematic review of different signal error reduction algorithms that are used for MEMS gyroscope-based Motion Analysis systems for human Motion Analysis or have the potential to be used in this area. A systematic search was performed with the search engines/databases of the ACM Digital Library, IEEE Xplore, PubMed, and Scopus. Sixteen papers that focus on MEMS gyroscope-related signal processing and were published in journals or conference proceedings in the past 10 years were found and fully reviewed. Seventeen algorithms were categorized into four main groups: Kalman-filter-based algorithms, adaptive-based algorithms, simple filter algorithms, and compensation-based algorithms. The algorithms were analyzed and presented along with their characteristics such as advantages, disadvantages, and time limitations. A user guide to the most suitable signal processing algorithms within this area is presented.
