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Personal Authentication Using Finger Knuckle Surface

Ajay Kumar, Ch. Ravikanth
2009 IEEE Transactions on Information Forensics and Security  
This paper investigates a new approach for personal authentication using finger back surface imaging.  ...  The texture pattern produced by the finger knuckle bending is highly unique and makes the surface a distinctive biometric identifier.  ...  Conclusions This paper has presented a new approach for personal authentication using finger back surface.  ... 
doi:10.1109/tifs.2008.2011089 fatcat:inddcvmpwrfqrf3hlen4f3plhu

Perceptual issues in substituting texture for geometry

Holly E. Rushmeier, Bernice E. Rogowitz, Christine Piatko, Bernice E. Rogowitz, Thrasyvoulos N. Pappas
2000 Human Vision and Electronic Imaging V  
A popular method for achieving geometric simplification is to replace fine scale geometric detail with texture images mapped onto the simplified geometry.  ...  We used a pair of simple large scale objects with different fine-scale geometric detail. For each object we generated many representations, varying the resources allocated to geometry and texture.  ...  Texture maps provide the illusion of detail. Even though texture is a flat image, when they are attached to the geometry new views can be obtained.  ... 
doi:10.1117/12.387174 dblp:conf/hvei/RushmeierRP00 fatcat:t2iih5q7rzel3mud352ls2w4kq

Performance capture from sparse multi-view video

Edilson de Aguiar, Carsten Stoll, Christian Theobalt, Naveed Ahmed, Hans-Peter Seidel, Sebastian Thrun
2008 ACM SIGGRAPH 2008 papers on - SIGGRAPH '08  
Our method delivers captured performance data at high level of detail, is highly versatile, and is applicable to many complex types of scenes that could not be handled by alternative marker-based or marker-free  ...  To serve this purpose our method efficiently and effectively combines the power of surface-and volume-based shape deformation techniques with a new mesh-based analysis-through-synthesis framework.  ...  Chan for helping us with the video. This work has been developed within the Max-Planck-Center for Visual Computing and Communication (MPC VCC) collaboration.  ... 
doi:10.1145/1399504.1360697 fatcat:cajucl3wczfuvicpixyfcy22ga

Performance capture from sparse multi-view video

Edilson de Aguiar, Carsten Stoll, Christian Theobalt, Naveed Ahmed, Hans-Peter Seidel, Sebastian Thrun
2008 ACM Transactions on Graphics  
Our method delivers captured performance data at high level of detail, is highly versatile, and is applicable to many complex types of scenes that could not be handled by alternative marker-based or marker-free  ...  To serve this purpose our method efficiently and effectively combines the power of surface-and volume-based shape deformation techniques with a new mesh-based analysis-through-synthesis framework.  ...  Chan for helping us with the video. This work has been developed within the Max-Planck-Center for Visual Computing and Communication (MPC VCC) collaboration.  ... 
doi:10.1145/1360612.1360697 fatcat:rlsfb7tstre7bndsgae4dnaqlq

An automatic unstructured grid generation method for viscous flow simulations

Seyed Saied Bahrainian, Zahra Mehrdoost
2012 Mathematics and Computers in Simulation  
Then, cells close to the solid surface are refined to highly stretched layer of triangles suitable for boundary layer region.  ...  Simultaneously, a directional grid refinement strategy is used to construct highly stretched triangular cells in viscous dominated regions.  ...  The present grid generation method is outlined in detail using a simple geometry shape for illustrative purposes.  ... 
doi:10.1016/j.matcom.2012.05.021 fatcat:dld6knthqzbqlltklsxxmu647q

The Influence of Image Processing and Layer-to-Background Contrast on the Reliability of Flatbed Scanner-Based Characterisation of Additively Manufactured Layer Contours

David Blanco, Pedro Fernández, Alejandro Fernández, Braulio J. Alvarez, José Carlos Rico
2020 Applied Sciences  
Completeness of contour reconstruction is evaluated by means of a coverage factor, whereas its accuracy is determined by comparison with a reference contour digitised in a coordinate measuring machine.  ...  Layer-wise contour deviation assessment could be critical for dimensional and geometrical quality improvement of AM parts, because it would allow for close-loop error compensation strategies.  ...  Consequently, a highly accurate characterisation of its actual (manufactured) geometry was obtained, which served as a reference for further comparisons.  ... 
doi:10.3390/app11010178 fatcat:koy536cml5e6jeu4cuetum4p5u

A Fast Semiautomatic Algorithm for Centerline-Based Vocal Tract Segmentation

Anton A. Poznyakovskiy, Alexander Mainka, Ivan Platzek, Dirk Mürbe
2015 BioMed Research International  
In this study, a centerline-based segmentation method using active contours was introduced to extract the geometry data of the vocal tract obtained with MRI during sustained vowel phonation.  ...  For a major part, this is due to difficulties in acquiring geometry data of the vocal tract in the process of voice production.  ...  For a detailed overview, see [2] . The elongated structure of the VT along with its curved shape makes segmentation feasible with the use of centerlinebased methods.  ... 
doi:10.1155/2015/906356 pmid:26557710 pmcid:PMC4628707 fatcat:afscb7n3hngnpahi7tjccj32ji

Pendent_Drop: An ImageJ Plugin to Measure the Surface Tension from an Image of a Pendent Drop

2016 Journal of Open Research Software  
Acknowledgements We thank Florence Elias and Caroline Derec for granting us access to the commercial surface tension measurement apparatus that was used to validate this software.  ...  In detail this requires the adaptation of the Contour and DContour classes to parameters describing the new geometry.  ...  If the new geometry is not right-left symmetric, findDropBorders(), makeClosed-Path(), updateOverlay() and any other method referring to left/rightBorder must be modified.  ... 
doi:10.5334/jors.97 fatcat:mqwnggpopzfxll3bukwlj6xdci

SharpNet: Fast and Accurate Recovery of Occluding Contours in Monocular Depth Estimation

Michael Ramamonjisoa, Vincent Lepetit
2019 2019 IEEE/CVF International Conference on Computer Vision Workshop (ICCVW)  
We show this by introducing a new benchmark based on NYUv2-Depth for evaluating occluding contours in monocular reconstruction, which is our second contribution.  ...  For example, they are a challenge for stereo-based reconstruction methods, as points around an occluding contour are only visible in one of the two views.  ...  See Section 4.1 for more details.  ... 
doi:10.1109/iccvw.2019.00266 dblp:conf/iccvw/RamamonjisoaL19 fatcat:tsxcjyn5xzfo7klheny3fn3pme

Methodology for image-based reconstruction of ventricular geometry for patient-specific modeling of cardiac electrophysiology

A. Prakosa, P. Malamas, S. Zhang, F. Pashakhanloo, H. Arevalo, D.A. Herzka, A. Lardo, H. Halperin, E. McVeigh, N. Trayanova, F. Vadakkumpadan
2014 Progress in Biophysics and Molecular Biology  
The goal of this study was to implement a processing pipeline for obtaining the interpolated reconstruction, and thoroughly evaluate the efficacy of this pipeline in comparison with alternative methods  ...  Reconstructions obtained from the Hi-res images were compared with the reconstructions computed by each of the interpolation methods from a sparse sample of the Hi-res contours, which mimicked Lo-res clinical  ...  interpolation methods for ventricular geometry reconstruction methods.  ... 
doi:10.1016/j.pbiomolbio.2014.08.009 pmid:25148771 pmcid:PMC4253866 fatcat:tlnjntragvaxzgbowmv4gggsfa

Page 83 of Journal of Aircraft Vol. 24, Issue 2 [page]

1987 Journal of Aircraft  
FEBRUARY 1987 Figure 4c shows the details of the orbiter geometry in the OMS pod region as modeled in this study. A detached OMS pod shock and a large subsonic pocket are formed in this region.  ...  R. and Osher, S., ‘“A New Class of High Ac- curacy TVD Schemes for Hyperbolic Conservation Laws,’’ AIAA Paper 85-0363, 1985. 6Chakravarthy, S.  ... 

Software assisted clamping point classification and position optimization for the efficient flexibilization of carbody fixtures using mathematical geometry-based search algorithms

Rayk Fritzsche, Robert Schaffrath, Marcel Todtermuschke
2021 Procedia CIRP  
For the optimization o f the clamping contours, a software was developed with which the geometries of the clamping points can be automatically analyzed and classified.  ...  For the optimization o f the clamping contours, a software was developed with which the geometries of the clamping points can be automatically analyzed and classified.  ...  Method for the analysis of clamping contours.  ... 
doi:10.1016/j.procir.2021.03.106 fatcat:gb3sl5zz5rgbnbujl2cefnyd6u

Curvature Vector Flow to Assure Convergent Deformable Models for Shape Modelling [chapter]

Debora Gil, Petia Radeva
2003 Lecture Notes in Computer Science  
In the present paper, we develop a new external energy based on the geometry of the curve to be modelled.  ...  The gradient of this map, which we call curvature vector flow (CVF), is capable of attracting a snake towards any contour, whatever its geometry.  ...  By means of the formulas developed, we build a new distance map to closed contours.  ... 
doi:10.1007/978-3-540-45063-4_23 fatcat:ioi4v26kfjdn5disjkqywl2tgi

Design for Composites: Derivation of Manufacturable Geometries for Unidirectional Tape Laying

Harald Voelkl, Andreas Kießkalt, Sandro Wartzack
2019 Proceedings of the International Conference on Engineering Design  
A new method for deriving tape courses from any finite element laminate optimisation result is presented and applied to a virtual demonstrator.  ...  However, current Computer Aided Engineering approaches for optimised laminate design still lack the capability to produce results suitable for ATL/AFP.  ...  Detail A shows a nearly-plane cluster, the same as in Figure 11 A, yet modified for ATL.  ... 
doi:10.1017/dsi.2019.275 fatcat:ua77e2xc4jft7g64mroo4gyvfm

Three-Dimensional Inviscid Analysis of the Scramjet Inlet Flowfield

Ajay Kumar
1982 Journal of Aircraft  
Detailed results are presented for a scramjet inlet con- figuration over a range of Mach numbers.  ...  The governing equations are solved by a time-asymptotic, unsplit, two-step, finite- difference method developed by MacCormack.® This method is highly efficient on the CDC-CYBER-203 vector processing computer  ... 
doi:10.2514/3.61571 fatcat:txmxbnl4sjhaveyf4y23yefbxm
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