Results 151 to 160 of about 909,380 (198)

Walking motion analysis using 3D non-harmonic analysis

2011 4th International Congress on Image and Signal Processing, 2011
The spatiotemporal spectra of a video that contains a moving object form a plane in the three-dimensional (3D) frequency domain. This plane, which is referred to as the theoretical motion plane, reflects the velocity, which is calculated from the slope, of the moving objects. In the present paper, we propose a high-resolution frequency analysis method,
Kenta Fujii, Takaaki Ueda, Shigeki Hirobayashi, Toshio Yoshizawa, Tadanobu Misawa   +4 more
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3D+T motion analysis with nanosensors

Applications of Digital Image Processing XL, 2017
This paper addresses the problem of motion analysis performed in a signal sampled on an irregular grid spread in 3-dimensional space and time (3D+T). Nanosensors can be randomly scattered in the field to form a “sensor network”. Once released, each nanosensor transmits at its own fixed pace information which corresponds to some physical variable ...
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3D motion pattern analysis of the foot

Proceedings. 11th IEEE Symposium on Computer-Based Medical Systems (Cat. No.98CB36237), 2002
Presents a method with preliminary results on collecting and analysing dynamic data describing some foot motions in 3D space. The overall aim of the research is to represent and compare such data for normal and club-foot patients and to investigate ways in which motion pattern data can effectively be analysed by a computer-based system.
M.A. Rodrigues, P. Alcoy, L. Irwin, A. Mohsen   +3 more
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3D nonrigid motion analysis under small deformations

Image and Vision Computing, 2003
We present a novel method for estimating motion parameters and point correspondences between 3D surfaces under small nonrigid motion. A vector point function is utilized as the motion parameter, called the displacement function. Differential-geometric changes of surfaces are then used in tracking small deformations.
Kambhamettu, Chandra, Goldgof, Dmitry, He, Matthew, Laskov, Pavel   +3 more
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3D Pseudolinear Target Motion Analysis From Angle Measurements

IEEE Transactions on Signal Processing, 2015
The paper presents a new pseudolinear estimator for 3D target motion analysis by a single moving ownship collecting azimuth and elevation angle measurements. The 3D pseudolinear estimator is derived as a small-noise approximation to the maximum-likelihood estimator and consists of a 2D pseudolinear estimator for the $xy$ -components of the target ...
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Single camera photogrammetric technique for restricted 3D motion analysis

Journal of Biomedical Engineering, 1990
The purpose of this study was to use a single camera to determine the true elbow flexion angle with the arm plane oriented arbitrarily with respect to the camera. A mathematical theory was developed and a mechanical arm model was constructed to validate the theory.
J A, Li, J T, Bryant, J M, Stevenson
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A New Precision 3D Motion Analysis System

Advances in Bioengineering, 1998
Abstract A new in vitro technique for measuring three-dimensional six-degree-of-freedom motion was developed. The system consists of twenty-four nylon lines activating digital rotary encoders which are mounted on six panels of a rigid frame that surround the testing space.
Mei Wang, Yong-M. Zhang, Mike Abell, Gregory L. D’Angelo, Michael J. Voor   +4 more
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Robust semantic analysis by synthesis of 3D facial motion

Face and Gesture 2011, 2011
Rich face models already have a large impact on the fields of computer vision, perception research, as well as computer graphics and animation. Attributes such as descriptiveness, semantics, and intuitive control are desirable properties but hard to achieve.
Breidt M., Biilthoff H.H., Curio C.
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Motion Analysis of 3D Ultrasound Texture Patterns

2003
We model the process of imaging soft tissues with a 3D ultrasound probe using a linear convolution model, and obtain analytical expressions of both the ultrasound image and its spectrum. We use this model to study the ultrasound decorrelation caused by tissue motion both in the spatial domain and spectral domain.
Yu, W., Lin, N., Yan, P., Purushothaman, K., Sinusas, A., Thiele, K., Duncan, J.S.   +6 more
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Walking Motion Analysis Using 3D Acceleration Sensors

2008 Second UKSIM European Symposium on Computer Modeling and Simulation, 2008
Human walking motion shows various information including involuntary behaviors such as walking patterns, ground conditions, health conditions, as well as conscious actions such as system control and communication. Such information can be used to establish interface with ubiquitous network systems.
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