Statistical Modeling of Interpersonal Distance with Range Imaging Data

2009 ◽  
pp. 137-144 ◽  
Author(s):  
René Hempel ◽  
Patrick Westfeld
Keyword(s):  
Statistical Modeling ◽  
Interpersonal Distance ◽  
Imaging Data ◽  
Range Imaging

Automatic techniques for 3D reconstruction of critical workplace body postures from range imaging data

2013 ◽  
Vol 85 ◽  
pp. 56-65 ◽  
Author(s):  
Patrick Westfeld ◽  
Hans-Gerd Maas ◽  
Oliver Bringmann ◽  
Daniel Gröllich ◽  
Martin Schmauder
Keyword(s):  
3D Reconstruction ◽  
Imaging Data ◽  
Range Imaging ◽  
Body Postures

scholarly journals Measurements of Detailed Temperature Profiles within the Radar Range Gate Using the Range Imaging Technique

2011 ◽  
Vol 28 (1) ◽  
pp. 22-36
Author(s):  
Jun-ichi Furumoto ◽  
Tomonori Shinoda ◽  
Atsushi Matsugatani ◽  
Toshitaka Tsuda
Keyword(s):  
Scattering Length ◽  
Acoustic Pulse ◽  
Small Scale ◽  
Iteration Algorithm ◽  
Temperature Structure ◽  
Temperature Profiles ◽  
Upward Movement ◽  
Imaging Data ◽  
Range Imaging ◽  
Mu Radar

Abstract The present study applies the range imaging (RIM) technique to radio acoustic sounding system (RASS) measurements in an attempt to improve the vertical resolution of temperature profiles obtained by RASS measurements. When an FM-chirped acoustic wave is used for RASS observations, the transmitted radio wave is backscattered from the section of the FM-chirped acoustic pulse where the Bragg condition between the radar and acoustic wavelengths is satisfied. The Bragg resonance region propagates upward with the upward movement of the acoustic pulse. To improve the height resolution of the RIM results, complex time series are extracted for an adequate period corresponding to the effective scattering length of the RASS echo. In the RIM analysis for RASS echo, a model temperature profile is required to compensate the Doppler shift bias due to the shape of range-gate weighting. To remove this bias, an iteration algorithm was developed so that the temperature profiles of the previous RIM results could be used for the bias correction of the next RIM step. The RIM technique was applied to RASS imaging measurements performed using the middle and upper atmosphere (MU) radar on 29–31 October 2006 in an attempt to improve the height resolution to approximately 60 m from the nominal range gate width of 150 m. The temperature profiles inside the radar range volume with a temporal resolution of 26 min were successfully retrieved. The detailed temperature structure, which cannot be revealed by conventional RASS observations, was clarified in the RIM results. In particular, the small-scale inversion layers inside the radar range gate were clearly revealed by the MU radar–RASS imaging data. These detailed temperature variations within the radar range gate agreed well with the simultaneous rawinsonde results.

scholarly journals HAPTIC HUMAN INTERFACES FOR ROBOTIC TELEMANIPULATION

2014 ◽  
pp. 81-88
Author(s):  
Emil M. Petriu ◽  
Pierre Payeur ◽  
Ana-Maria Cretu
Keyword(s):  
Neural Network ◽  
Network Architecture ◽  
Tactile Feedback ◽  
Haptic Interface ◽  
Imaging Data ◽  
Range Imaging ◽  
Neural Network Architecture ◽  
Robot Interaction ◽  
3D Objects ◽  
Force Profile

Recent investigation in haptic man-robot interaction suggests that there are ultimately only two topical tactile feedback generation modalities for haptic human interfaces. These allow the human operator to handle either (i) temporary virtual reality-based material replicas of the local geometric and/or force profile at the contact areas of an unlimited set of generic objects that could virtually be handled during the manipulation, or (ii) permanent material replicas of a limited set of typical objects. In this paper, the two modalities are analyzed and examples of tactile human interfaces developed by the authors for telerobotic blind tactile exploration of objects, and for telerobotic hapto-visual stylus-style tool manipulation are presented to illustrate the proposed approaches. The necessary modelling of the elastic properties of 3D objects from experimental tactile and range imaging data is also presented using a neural network architecture that becomes an important component of the haptic interface.

Correlation of Pore Structure and Permeability by SEM-Image Analysis

1990 ◽  
Vol 48 (1) ◽  
pp. 428-429
Author(s):  
C. A. Callender ◽  
Wm. C. Dawson ◽  
J. J. Funk
Keyword(s):  
Image Analysis ◽  
Pore Structure ◽  
Imaging System ◽  
Pore Space ◽  
Simulation Models ◽  
Image Analyzer ◽  
Imaging Data ◽  
Sem Images ◽  
Thin Sections ◽  
Rock Types

The geometric structure of pore space in some carbonate rocks can be correlated with petrophysical measurements by quantitatively analyzing binaries generated from SEM images. Reservoirs with similar porosities can have markedly different permeabilities. Image analysis identifies which characteristics of a rock are responsible for the permeability differences. Imaging data can explain unusual fluid flow patterns which, in turn, can improve production simulation models.Analytical SchemeOur sample suite consists of 30 Middle East carbonates having porosities ranging from 21 to 28% and permeabilities from 92 to 2153 md. Engineering tests reveal the lack of a consistent (predictable) relationship between porosity and permeability (Fig. 1). Finely polished thin sections were studied petrographically to determine rock texture. The studied thin sections represent four petrographically distinct carbonate rock types ranging from compacted, poorly-sorted, dolomitized, intraclastic grainstones to well-sorted, foraminiferal,ooid, peloidal grainstones. The samples were analyzed for pore structure by a Tracor Northern 5500 IPP 5B/80 image analyzer and a 80386 microprocessor-based imaging system. Between 30 and 50 SEM-generated backscattered electron images (frames) were collected per thin section. Binaries were created from the gray level that represents the pore space. Calculated values were averaged and the data analyzed to determine which geological pore structure characteristics actually affect permeability.

Cleavage of Human Embryos: Options and Diversity

Acta Naturae ◽  
2016 ◽  
Vol 8 (3) ◽  
pp. 88-96
Author(s):  
Yu. K. Doronin ◽  
I. V. Senechkin ◽  
L. V. Hilkevich ◽  
M. A. Kurcer
Keyword(s):  
Time Lapse ◽  
Reproductive Technologies ◽  
Human Embryos ◽  
Imaging Data ◽  
Noninvasive Methods ◽  
Topographic Features ◽  
Time Parameters ◽  
Embryo Cleavage ◽  
Time Lapse Imaging ◽  
Developmental Dynamics

In order to estimate the diversity of embryo cleavage relatives to embryo progress (blastocyst formation), time-lapse imaging data of preimplantation human embryo development were used. This retrospective study is focused on the topographic features and time parameters of the cleavages, with particular emphasis on the lengths of cleavage cycles and the genealogy of blastomeres in 2- to 8-cell human embryos. We have found that all 4-cell human embryos have four developmental variants that are based on the sequence of appearance and orientation of cleavage planes during embryo cleavage from 2 to 4 blastomeres. Each variant of cleavage shows a strong correlation with further developmental dynamics of the embryos (different cleavage cycle characteristics as well as lengths of blastomere cycles). An analysis of the sequence of human blastomere divisions allowed us to postulate that the effects of zygotic determinants are eliminated as a result of cleavage, and that, thereafter, blastomeres acquire the ability of own syntheses, regulation, polarization, formation of functional contacts, and, finally, of specific differentiation. This data on the early development of human embryos obtained using noninvasive methods complements and extend our understanding of the embryogenesis of eutherian mammals and may be applied in the practice of reproductive technologies.

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