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open access

SAR polar format implementation with MATLAB.

Description: Traditional polar format image formation for Synthetic Aperture Radar (SAR) requires a large amount of processing power and memory in order to accomplish in real-time. These requirements can thus eliminate the possible usage of interpreted language environments such as MATLAB. However, with trapezoidal aperture phase history collection and changes to the traditional polar format algorithm, certain optimizations make MATLAB a possible tool for image formation. Thus, this document's purpose is tw… more
Date: November 1, 2005
Creator: Martin, Grant D. & Doerry, Armin Walter
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Automated measurement of quality of mucosa inspection for colonscopy

Description: This paper from the International Conference on Computational Science conference proceedings presents new methods that derive a new quality metric for automated scoring of quality of mucosa inspection performed by the endoscopist.
Date: May 31, 2010
Creator: Liu, Xuemin; Tavanapong, Wallapak; Wong, Johnny; Oh, JungHwan & de Groen, Piet C.
Item Type: Refine your search to only Paper
Partner: UNT College of Engineering
open access

A novel polar format algorithm for SAR images utilizing post azimuth transform interpolation.

Description: SAR phase history data represents a polar array in the Fourier space of a scene being imaged. Polar Format processing is about reformatting the collected SAR data to a Cartesian data location array for efficient processing and image formation. In a real-time system, this reformatting or ''re-gridding'' operation is the most processing intensive, consuming the majority of the processing time; it also is a source of error in the final image. Therefore, any effort to reduce processing time while n… more
Date: September 1, 2005
Creator: Holzrichter, Michael Warren; Martin, Grant D. & Doerry, Armin Walter
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fusion of image data for beyond-the-fence intruder detection and assessment.

Description: The use of combined imagery from different imaging sensors has the potential to provide significant performance improvements over the use of a single image sensor for beyond-the-fence detection and assessment of intruders. Sensing beyond the fence is very challenging for imagers due to uncertain dynamic and harsh environmental conditions. The use of imagery from varying spectral bands can alleviate some of this difficulty by providing stronger truth data that can be combined with truth data fro… more
Date: September 1, 2007
Creator: Nelson, Cynthia Lee
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Automated Real-time Objects Detection in Colonoscopy Videos for Quality Measurements

Description: The effectiveness of colonoscopy depends on the quality of the inspection of the colon. There was no automated measurement method to evaluate the quality of the inspection. This thesis addresses this issue by investigating an automated post-procedure quality measurement technique and proposing a novel approach automatically deciding a percentage of stool areas in images of digitized colonoscopy video files. It involves the classification of image pixels based on their color features using a new… more
Date: August 2013
Creator: Kumara, Muthukudage Jayantha
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Artificial Intelligence for Colonoscopy: Past, Present, and Future

Description: Article summarizing the past and present development of colonoscopy video analysis methods, focusing on two categories of artificial intelligence (AI) technologies used in clinical trials, (1) analysis and feedback for improving colonoscopy quality and (2) detection of abnormalities.
Date: August 2021
Creator: Tavanapong, Wallapak; Oh, JungHwan; Riegler, Michael; Khaleel, Mohammed I.; Mitta, Bhuvan & de Groen, Piet C.
Item Type: Refine your search to only Article
Partner: UNT College of Engineering
open access

Quantitive DNA Fiber Mapping

Description: Several hybridization-based methods used to delineate single copy or repeated DNA sequences in larger genomic intervals take advantage of the increased resolution and sensitivity of free chromatin, i.e., chromatin released from interphase cell nuclei. Quantitative DNA fiber mapping (QDFM) differs from the majority of these methods in that it applies FISH to purified, clonal DNA molecules which have been bound with at least one end to a solid substrate. The DNA molecules are then stretched by th… more
Date: January 28, 2008
Creator: Lu, Chun-Mei; Wang, Mei; Greulich-Bode, Karin M.; Weier, Jingly F. & Weier, Heinz-Ulli G.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Video Analytics with Spatio-Temporal Characteristics of Activities

Description: As video capturing devices become more ubiquitous from surveillance cameras to smart phones, the demand of automated video analysis is increasing as never before. One obstacle in this process is to efficiently locate where a human operator’s attention should be, and another is to determine the specific types of activities or actions without ambiguity. It is the special interest of this dissertation to locate spatial and temporal regions of interest in videos and to develop a better action repre… more
Date: May 2015
Creator: Cheng, Guangchun
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Development of Characterization Tools for Reliability Testing of MicroElectroMechanical System Actuators

Description: Characterization tools have been developed to study the performance characteristics and reliability of surface micromachined actuators. These tools include (1) the ability to electrically stimulate or stress the actuator, (2) the capability to visually inspect the devices in operation, (3) a method for capturing operational information, and (4) a method to extract performance characteristics from the operational information. Additionally, a novel test structure has been developed to measure ele… more
Date: July 26, 1999
Creator: Allen, James J.; Eaton, William P.; Smith, Norman F. & Tanner, Danelle M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Poblano v1.0 : a Matlab toolbox for gradient-based optimization.

Description: We present Poblano v1.0, a Matlab toolbox for solving gradient-based unconstrained optimization problems. Poblano implements three optimization methods (nonlinear conjugate gradients, limited-memory BFGS, and truncated Newton) that require only first order derivative information. In this paper, we describe the Poblano methods, provide numerous examples on how to use Poblano, and present results of Poblano used in solving problems from a standard test collection of unconstrained optimization pro… more
Date: March 1, 2010
Creator: Dunlavy, Daniel M.; Acar, Evrim (Sandia National Laboratories, Livermore, CA) & Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A preliminary report on the development of MATLAB tensor classes for fast algorithm prototyping.

Description: We describe three MATLAB classes for manipulating tensors in order to allow fast algorithm prototyping. A tensor is a multidimensional or N-way array. We present a tensor class for manipulating tensors which allows for tensor multiplication and 'matricization.' We have further added two classes for representing tensors in decomposed format: cp{_}tensor and tucker{_}tensor. We demonstrate the use of these classes by implementing several algorithms that have appeared in the literature.
Date: July 1, 2004
Creator: Bader, Brett William & Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary versions of the MATLAB tensor classes for fast algorithm prototyping.

Description: We present the source code for three MATLAB classes for manipulating tensors in order to allow fast algorithm prototyping. A tensor is a multidimensional or Nway array. This is a supplementary report; details on using this code are provided separately in SAND-XXXX.
Date: July 1, 2004
Creator: Bader, Brett William & Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Multi-scale saliency search in image analysis.

Description: Saliency detection in images is an important outstanding problem both in machine vision design and the understanding of human vision mechanisms. Recently, seminal work by Itti and Koch resulted in an effective saliency-detection algorithm. We reproduce the original algorithm in a software application Vision and explore its limitations. We propose extensions to the algorithm that promise to improve performance in the case of difficult-to-detect objects.
Date: October 1, 2005
Creator: Slepoy, Alexander; Campisi, Anthony & Backer, Alejandro
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

MATLAB tensor classes for fast algorithm prototyping.

Description: Tensors (also known as mutidimensional arrays or N-way arrays) are used in a variety of applications ranging from chemometrics to psychometrics. We describe four MATLAB classes for tensor manipulations that can be used for fast algorithm prototyping. The tensor class extends the functionality of MATLAB's multidimensional arrays by supporting additional operations such as tensor multiplication. The tensor as matrix class supports the 'matricization' of a tensor, i.e., the conversion of a tensor … more
Date: October 1, 2004
Creator: Bader, Brett William & Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

MATLAB tensor classes for fast algorithm prototyping : source code.

Description: We present the source code for three MATLAB classes for manipulating tensors in order to allow fast algorithm prototyping. A tensor is a multidimensional or Nway array. This is a supplementary report; details on using this code are provided separately in SAND-XXXX.
Date: October 1, 2004
Creator: Bader, Brett William & Kolda, Tamara Gibson (Sandia National Laboratories, Livermore, CA)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Novel Passive Millimeter Imager for Broad-Area Search - Final Report on Project PL09-NPMI-PD07 (PNNL-55180)

Description: This report describes research and development efforts toward a novel passive millimeter-wave (mm-wave) electromagnetic imaging device for broad-area search. It addresses the technical challenge of detecting anomalies that occupy a small fraction of a pixel. The purpose of the imager is to pinpoint suspicious locations for cuing subsequent higher-resolution imaging. The technical basis for the approach is to exploit thermal and polarization anomalies that distinguish man-made features from natu… more
Date: December 31, 2011
Creator: Tedeschi, Jonathan R.; Bernacki, Bruce E.; Kelly, James F.; Sheen, David M.; Harris, Robert V.; Hall, Thomas E. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Independent Validation and Verification of Process Design and Optimization Technology Diagnostic and Control of Natural Gas Fired Furnaces via Flame Image Analysis Technology

Description: The United States Department of Energy, Industrial Technologies Program has invested in emerging Process Design and Optimizations Technologies (PDOT) to encourage the development of new initiatives that might result in energy savings in industrial processes. Gas fired furnaces present a harsh environment, often making accurate determination of correct air/fuel ratios a challenge. Operation with the correct air/fuel ratio and especially with balanced burners in multi-burner combustion equipment … more
Date: May 1, 2009
Creator: Cox, Daryl
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

3-D Characterization of the Structure of Paper and Paperboard and Their Application to Optimize Drying and Water Removal Processes and End-Use Applications

Description: The three dimensional structure of paper materials plays a critical role in the paper manufacturing process especially via its impact on the transport properties for fluids. Dewatering of the wet web, pressing and drying will benefit from knowledge of the relationships between the web structure and its transport coefficients. The structure of the pore space within a paper sheet is imaged in serial sections using x-ray micro computed tomography. The three dimensional structure is reconstructed f… more
Date: August 29, 2004
Creator: Shri Ramaswamy, University of Minnesota & B.V. Ramarao, State University of New York
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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