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1045 full-text articles. Page 5 of 32.

3-D Shape Recovery From A Single Camera Image, Vijai Jayadevan, Aaron Michaux, Edward Delp, Zygmunt Pizlo 2016 Purdue University

3-D Shape Recovery From A Single Camera Image, Vijai Jayadevan, Aaron Michaux, Edward Delp, Zygmunt Pizlo

MODVIS Workshop

3-D shape recovery is an ill-posed inverse problem which must be solved by using a priori constraints. We use symmetry and planarity constraints to recover 3-D shapes from a single image. Once we assume that the object to be reconstructed is symmetric, all that is left to do is to estimate the plane of symmetry and establish the symmetry correspondence between the various parts of the object. The edge map of the image of an object serves as a good representation of its 2-D shape and establishing symmetry correspondence means identifying pairs of symmetric curves in the edge map. The ...


An Image-Based Model For Early Visual Processing, Heiko H. Schütt, Felix A. Wichmann 2016 University of Tübingen

An Image-Based Model For Early Visual Processing, Heiko H. Schütt, Felix A. Wichmann

MODVIS Workshop

No abstract provided.


Implementation Of The Continuous Space Language Model On A Heterogeneous Mobile Processor, Kurt Spencer Shively 2016 Indiana University - Purdue University Fort Wayne

Implementation Of The Continuous Space Language Model On A Heterogeneous Mobile Processor, Kurt Spencer Shively

Masters' Theses

Mobile processors continue to increase in performance while becoming more power efficient, providing consumers with improved gaming, multi-media, and browsing, along with longer lasting device usage. To keep up with consumer multimedia demand, mobile processor manufacturers have begun to integrate Graphical Processing Units (GPU) on mobile processors, providing users with the high performance graphics required for mobile gaming applications. The addition of integrated GPUs to the mobile processors also offers new opportunities for introducing to the mobile platform computationally intensive algorithms that were formerly impractical when running on the mobile CPU processor alone. GPU manufacturers such as NVIDIA are scaling ...


Magnetic Local Positioning System With Supplemental Magnetometer-Accelerometer Data Fusion, Benjamin Scott Prothro 2016 The University of Tennessee, Knoxville

Magnetic Local Positioning System With Supplemental Magnetometer-Accelerometer Data Fusion, Benjamin Scott Prothro

Doctoral Dissertations

Geo-location and tracking technology, once confined to the industrial and military sectors, have been widely proliferated to the consumer world since early in the twenty-first century. The commoditization of Global Positioning System (GPS) and inertial measurement integrated circuits has made this possible, with devices small enough to fit in a cellular phone. However, GPS technology is not without its drawbacks: Its power use is high, and it can fail in smaller, obstructed spaces. Magnetic positioning, which exploits the magnetic field coupling between a set of transmitter beacon coils and a set of receiver coils, is an often overlooked, complementary technology ...


Conversion Of Digital Circuits Labs, Caleb N. Taber 2016 ETSU

Conversion Of Digital Circuits Labs, Caleb N. Taber

Undergraduate Honors Theses

The engineering technology department at ETSU currently lacks a modern method to teach digital circuits. The aim of this thesis is to convert our current digital circuits labs to equivalent labs suited to run on the Basys 3. The Basys has several advantages over the aging NI Elvis boards (and now just breadboards) currently in use. The first advantage is that the Basys gives students a taste of FPGA programming without being overwhelmingly; like the systems currently in place for the digital signal processing class. The Basys is also a more modern system; our current integrated circuit and breadboard system ...


Using Labview For Signal Processing And Noise Reduction For Flow Cytometry, Jacob Feddersen 2016 Iowa State University

Using Labview For Signal Processing And Noise Reduction For Flow Cytometry, Jacob Feddersen

Honors Projects and Posters

Flow cytometry is a method by which microparticles and cells in a stream of fluid can be measured. Most currently available cytometers are very large and expensive because they require equipment such as lasers and optics. Our goal was to create a basic lightweight, inexpensive cytometer. The sensor works by passing the fluid with the particles through a specially designed microchannel that forces the particles to flow through in single file. The particles are measured by taking into account their optical properties; an LED of a specific frequency is shined on the particles which excites them, causing them to emit ...


Ac Power Monitoring System Provides Individual Circuit Energy Consumption Data, Jared L. Newman, Grayson H. Dearing, Luke M. Tomlinson, Frederick G. Harmon 2016 Cedarville University

Ac Power Monitoring System Provides Individual Circuit Energy Consumption Data, Jared L. Newman, Grayson H. Dearing, Luke M. Tomlinson, Frederick G. Harmon

The Research and Scholarship Symposium

Motivated by high energy costs, people and organizations want to cut back on their energy consumption. However, the only feedback consumers typically receive is a monthly bill listing their total electricity usage (in kWh). Some companies have begun developing systems that allow households and organizations to monitor their energy usage for individual circuits. Available systems are expensive so a CU engineering senior design team has designed, fabricated, and tested a system for use at Cedarville University. The AC power monitoring system has the ability to measure energy consumption for each individual circuit in the breaker panel, store the data, and ...


Novel Convergence Results In Nonlinear Filtering, Jennifer Lynn Bonniwell 2016 Marquette University

Novel Convergence Results In Nonlinear Filtering, Jennifer Lynn Bonniwell

Dissertations (2009 -)

In this dissertation, the discrete-time extended Kalman filter is analyzed for its ability to attenuate finite-energy disturbances, known as the H-infinity property. Though the extended Kalman filter is designed to be a locally optimal minimum variance estimator, this dissertation proves that it has additional properties, such as H-infinity. This analysis is performed with the extended Kalman filter in direct form. Since this form reduces assumptions placed on the system in previous works on convergence and H-2 properties of the extended Kalman filter, the extended Kalman filter used as a nonlinear observer for noise-free models is revisited using the direct form ...


Spatio-Spectral Sampling And Color Filter Array Design, Keigo Hirakawa, Patrick Wolfe 2016 University of Dayton

Spatio-Spectral Sampling And Color Filter Array Design, Keigo Hirakawa, Patrick Wolfe

Keigo Hirakawa

Owing to the growing ubiquity of digital image acquisition and display, several factors must be considered when developing systems to meet future color image processing needs, including improved quality, increased throughput, and greater cost-effectiveness. In consumer still-camera and video applications, color images are typically obtained via a spatial subsampling procedure implemented as a color filter array (CFA), a physical construction whereby only a single component of the color space is measured at each pixel location. Substantial work in both industry and academia has been dedicated to post-processing this acquired raw image data as part of the so-called image processing pipeline ...


Coffee Queue Project, George Dimitrov Gargov 2016 California Polytechnic State University - San Luis Obispo

Coffee Queue Project, George Dimitrov Gargov

Master's Theses and Project Reports

In this paper, a computer vision system for counting people standing in line is presented. In this application, common techniques such as Adaptive Background Subtraction (ABS), blob tracking with Kalman filter, and occlusion resistive techniques are used to detect and track people. Additionally, a novel method using Dual Adaptive Background Subtractors (DABS) is implemented for dynamically determining the line region in a real-world crowded scene, and also as an alternative target acquisition to regular ABS. The DABS technique acts as a temporal bandpass filter for motion, helping identify people standing in line while in the presence of other moving people ...


Mean-Field-Analysis Of Coding Versus Replication In Cloud Storage Systems, Bin Li, Aditya Ramamoorthy, R. Srikant 2016 University of Illinois at Urbana-Champaign

Mean-Field-Analysis Of Coding Versus Replication In Cloud Storage Systems, Bin Li, Aditya Ramamoorthy, R. Srikant

Electrical and Computer Engineering Conference Papers, Posters and Presentations

We study cloud-storage systems with a very large number of files stored in a very large number of servers. In such systems, files are either replicated or coded to ensure reliability, i.e., file recovery from server failures. This redundancy in storage can further be exploited to improve system performance (mean file access delay) through appropriate load-balancing (routing) schemes. However, it is unclear whether coding or replication is better from a system performance perspective since the corresponding queueing analysis of such systems is, in general, quite difficult except for the trivial case when the system load asymptotically tends to zero ...


Coded Caching With Low Subpacketization Levels, Li Tang, Aditya Ramamoorthy 2016 Iowa State University

Coded Caching With Low Subpacketization Levels, Li Tang, Aditya Ramamoorthy

Electrical and Computer Engineering Conference Papers, Posters and Presentations

Caching is popular technique in content delivery networks that allows for reductions in transmission rates from the content-hosting server to the end users. Coded caching is a generalization of conventional caching that considers the possibility of coding in the caches and transmitting coded signals from the server. Prior results in this area demonstrate that huge reductions in transmission rates are possible and this makes coded caching an attractive option for the next generation of content-delivery networks. However, these results require that each file hosted in the server be partitioned into a large number (i.e., the subpacketization level) of non- ...


Model Benchmarking And Reference Signals For Angled-Beam Shear Wave Ultrasonic Nde Inspections, John C. Aldrin, Deborah Hopkins, Mark Warchol, Lyudmila V. Warchol, David S. Forsyth, Charlie Buynak, Eric A. Lindgren 2016 Computational Tools, Gurnee

Model Benchmarking And Reference Signals For Angled-Beam Shear Wave Ultrasonic Nde Inspections, John C. Aldrin, Deborah Hopkins, Mark Warchol, Lyudmila V. Warchol, David S. Forsyth, Charlie Buynak, Eric A. Lindgren

Review of Progress in Quantitative Nondestructive Evaluation

NDE modeling and simulation are important tools to support the development and validation of enhanced localization and characterization techniques. Previously, important achievements were made by the USAF to address crack detection in aircraft structures using angled-beam shear wave inspection techniques. However, new work on model benchmarking is needed to move beyond detection and achieve reliable crack characterization. To achieve this goal, simulated studies are needed to verify that models can accurately represent all of the key variables with the inspection of multilayer structures with fastener sites and varying crack conditions. Often with model benchmark studies, the accuracy of the model ...


Windowing Of Full Wavefield Data In Multiple Domains To Characterize Angle-Beam Shear Wave Scattering, Yu Weng, Jennifer E. Michaels 2016 Georgia Institute of Technology

Windowing Of Full Wavefield Data In Multiple Domains To Characterize Angle-Beam Shear Wave Scattering, Yu Weng, Jennifer E. Michaels

Review of Progress in Quantitative Nondestructive Evaluation

Angle-beam ultrasonic inspection methods are frequently based on shear waves since they are readily generated using conventional longitudinal transducers and a wedge. Full wavefield imaging can be employed to measure such waves on the surface of a plate-like specimen after they have scattered from a feature or defect of interest, and multiple shear wave arrivals, or “skips,” are readily visible due to beam spread [1]. Because of the complexity of the total wavefield, which also includes Rayleigh and longitudinal waves, it is challenging to experimentally quantify scattering from the primary skip of interest. Considered here is a methodology to isolate ...


Existing Weld Seam Recognition And Tracking Based On Sub Region Image Processing, Guoan Liang, Shanshan Wang, Chunlei Tu, Xingsong Wang 2016 Special Equipment Safety Supervision Inspection Institute of Jiangsu Province

Existing Weld Seam Recognition And Tracking Based On Sub Region Image Processing, Guoan Liang, Shanshan Wang, Chunlei Tu, Xingsong Wang

Review of Progress in Quantitative Nondestructive Evaluation

This paper proposes a new algorithm of weld seam recognition for existing weld seam tracking based on sub region neural network. The original images need to be reduced by half and transformed to gray image. Then each picture is divided into 96 small pictures. Sub region neural network of three layers is applied to each small picture. The identification of 96 sub pictures is synthetized to complete the weld seam recognition result of each image. Before training, 5000 samples are obtained in total and they are classified into two categories. 4000 sets of them are considered as training data and ...


Application Of Radon Transform To Wavefield Filtering, Reconstruction, And Imaging Of Dispersive Energies In Quantitative Bone Ultrasound, Lawrence H. Le, Mauricio D. Sacchi 2016 University of Alberta

Application Of Radon Transform To Wavefield Filtering, Reconstruction, And Imaging Of Dispersive Energies In Quantitative Bone Ultrasound, Lawrence H. Le, Mauricio D. Sacchi

Review of Progress in Quantitative Nondestructive Evaluation

Multichannel ultrasonic axial-transmission data are multimodal by nature. Multichannel analysis of dispersive ultrasonic energies requires a reliable mapping of the data from the time– distance (t-x) domain to the frequency–wavenumber (f-k) or frequency–phase velocity (f-c) domain. The mapping is usually performed with the classical 2-D Fourier transform (FT) from t- x plane to f-k plane or to f-c plane with a subsequent substitution and interpolation via c=ω/k. The extracted dispersion trajectories of the guided modes lack the resolution in the transformed domain to discriminate wave modes. The resolving power associated with the FT is closely linked ...


Nonlinear Mixing Algorithm For Rivet Signal Suppression In Ec-Gmr Inspection Of Multilayer Structures, Seyed Safdernejad, Oleksii Karpenko, Chaofeng Ye, Lalita Udpa, Satish Udpa 2016 Michigan State University

Nonlinear Mixing Algorithm For Rivet Signal Suppression In Ec-Gmr Inspection Of Multilayer Structures, Seyed Safdernejad, Oleksii Karpenko, Chaofeng Ye, Lalita Udpa, Satish Udpa

Review of Progress in Quantitative Nondestructive Evaluation

Giant Magneto-Resistive (GMR) sensors have recently emerged as a promising tool for Eddy Current (EC) inspection of multi-layer riveted structures. However, the detection of defects under fasteners remains a challenging problem, since the distortion of the induced magnetic field introduced by subsurface flaws is masked by the strong responses from steel fasteners and structural edges. Multi-frequency EC-GMR measurements can be used to suppress the rivet signal, while retaining defect indications and hence increase the detectability of defects. In this paper, we propose a novel generic filter for processing EC-GMR measurements acquired at a single or multiple excitation frequencies to suppress ...


Experimental Characterization Of Sulfate Damage Of Concrete Based On The Harmonic Wave Modulation Technique, Tinyuan Yin, Wanlin Meng, Neda Talebzadeh, Jun Chen 2016 Beihang University

Experimental Characterization Of Sulfate Damage Of Concrete Based On The Harmonic Wave Modulation Technique, Tinyuan Yin, Wanlin Meng, Neda Talebzadeh, Jun Chen

Review of Progress in Quantitative Nondestructive Evaluation

The objective of this paper is to characterize cracking progression of concrete samples subjected to sulfate attack cycles by employment of a nonlinear wave modulation technique. The sidebands in frequency domain (f1±f2) are produced due to the modulation of two ultrasonic waves (high frequency f1 and low frequency f2) and the relative amplitude of sidebands is defined as the nonlinear parameter considered as a caliber for structural damage. Different from previous work where the low frequency signal was generated by the instrumented hammer, the low frequency signal in this research is a harmonic wave produced by an electromagnetic exciter ...


Novel Wavelet Threshold Denoising Method In Axle Press-Fit Zone Ultrasonic Detection, Chaoyong Peng, Xiaorong Gao, Jianping Peng, Ai Wang 2016 Southwest Jiaotong University

Novel Wavelet Threshold Denoising Method In Axle Press-Fit Zone Ultrasonic Detection, Chaoyong Peng, Xiaorong Gao, Jianping Peng, Ai Wang

Review of Progress in Quantitative Nondestructive Evaluation

Axles are important part of railway locomotives and vehicles. Periodic ultrasonic inspection of axles can effectively detect and monitor axle fatigue cracks. However, in the axle press-fit zone, the complex interface contact condition reduces the signal-noise ratio (SNR). Therefore, the probability of false positives and false negatives increases. In this work, a novel wavelet threshold function is created to remove noise and suppress press-fit interface echoes in axle ultrasonic defect detection. The exponential threshold function proposed by Andria [1] can't get a gradual curve for later optimum searching process; and the novel wavelet threshold function with two variables is ...


Results Of Using Frequency Banded Saft For Examining Three Types Of Defects, Dwight Clayton, Alan Barker, Hector Santos-Villalobos 2016 Oak Ridge National Laboratory

Results Of Using Frequency Banded Saft For Examining Three Types Of Defects, Dwight Clayton, Alan Barker, Hector Santos-Villalobos

Review of Progress in Quantitative Nondestructive Evaluation

A multitude of concrete-based structures are typically part of a light water reactor (LWR) plant to provide the foundation, support, shielding, and containment functions. Concrete has been used in the construction of nuclear power plants (NPPs) because of three primary properties; its inexpensiveness, structural strength, and ability to shield radiation. Examples of concrete structures important to the safety of LWR plants include the containment building, spent fuel pool, and cooling towers. This use has made concrete’s long-term performance crucial for the safe operation of commercial NPPs. Extending reactor life to 60 years and beyond will likely increase susceptibility and ...


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