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Dissertations / Theses on the topic 'Enhanced images'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Munechika, Curtis K. "Merging panchromatic and multispectral images for enhanced image analysis /." Online version of thesis, 1990. http://hdl.handle.net/1850/11366.

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Hayton, Paul M. "Analysis of contrast-enhanced breast MR images." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298777.

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3

Ju, Chen. "Edge-enhanced segmentation for SAR images." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ34190.pdf.

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4

Melbourne, A. "Alignment of contrast enhanced medical images." Thesis, University College London (University of London), 2009. http://discovery.ucl.ac.uk/15846/.

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The re-alignment of series of medical images in which there are multiple contrast variations is difficult. The reason for this is that the popularmeasures of image similarity used to drive the alignment procedure do not separate the influence of intensity variation due to image feature motion and intensity variation due to feature enhancement. In particular, the appearance of new structure poses problems when it has no representation in the original image. The acquisition of many images over time, such as in dynamic contrast enhanced MRI, requires that many images with different contrast be re

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Chen, Zhouye. "Reconstruction of enhanced ultrasound images from compressed measurements." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30222/document.

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L'intérêt de l'échantillonnage compressé dans l'imagerie ultrasonore a été récemment évalué largement par plusieurs équipes de recherche. Suite aux différentes configurations d'application, il a été démontré que les données RF peuvent être reconstituées à partir d'un faible nombre de mesures et / ou en utilisant un nombre réduit d'émission d'impulsions ultrasonores. Selon le modèle de l'échantillonnage compressé, la résolution des images ultrasonores reconstruites à partir des mesures compressées dépend principalement de trois aspects: la configuration d'acquisition, c.à.d. l'incohérence de la

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Du, Xiaoyun. "Enhanced Contour Description for People Detection in Images." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31804.

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People detection has been an attractive technology in computer vision. There are many useful applications in our daily life, for instance, intelligent surveillance and driver assistance system. People detection is a challenging matter as people adopt a wide range of poses, wear diverse clothes, and are visible in different kind of backgrounds with significant changes in illumination. In this thesis, some advanced techniques and powerful tools are presented in order to design a robust people detection system. First a baseline model is implemented by combining the Histogram of Oriented Gradients

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Lu, Yi Cheng. "Classifying Liver Fibrosis Stage Using Gadoxetic Acid-Enhanced MR Images." Thesis, Linköpings universitet, Institutionen för medicin och hälsa, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-162989.

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The purpose is trying to classify the Liver Fibrosis stage using Gadoxetic Acid-EnhancedMR Images. In the very beginning, a method proposed by one Korean group is being examined and trying to reproduce their result. However, the performance is not as impressive as theirs. Then, some gray-scale image feature extraction methods are used. Last but not least, the hottest method in recent years - ConvolutionNeural Network(CNN) was utilized. Finally, the performance has been evaluated in both methods. The result shows that with manual feature extraction, the Adaboost model works pretty well that AU

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Reeves, Steven Joseph. "Sea Ice Mapping Using Enhanced Resolution Advanced Scatterometer Images." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3484.

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Sea ice is of great interest due to its effect on the global climate, the Earth's ecosystem, and human activities. Microwave remote sensing has proven to be an effective way to measure many of the characteristics of sea ice. In particular, several algorithms map the daily sea ice extent using a variety of instruments. Enhanced resolution images generated from the Scatterometer Image Reconstruction (SIR) algorithm can be used to generate a high resolution ice extent map. Previous algorithms using SIR images were developed for scatterometers which are no longer operational. The Advanced Scattero

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Usta, Fatma. "Image Processing Methods for Myocardial Scar Analysis from 3D Late-Gadolinium Enhanced Cardiac Magnetic Resonance Images." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37920.

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Myocardial scar, a non-viable tissue which occurs on the myocardium due to the insufficient blood supply to the heart muscle, is one of the leading causes of life-threatening heart disorders, including arrhythmias. Analysis of myocardial scar is important for predicting the risk of arrhythmia and locations of re-entrant circuits in patients’ hearts. For applications, such as computational modeling of cardiac electrophysiology aimed at stratifying patient risk for post-infarction arrhythmias, reconstruction of the intact geometry of scar is required. Currently, 2D multi-slice late gadolinium-e

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10

Tanner, Christine. "Registration and lesion classification of contrast-enhanced magnetic resonance breast images." Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427950.

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Yap, Moi Hoon. "Enhanced algorithms for lesion detection and recognition in ultrasound breast images." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/35018.

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Mammography is the gold standard for breast cancer detection. However, it has very high false positive rates and is based on ionizing radiation. This has led to interest in using multi-modal approaches. One modality is diagnostic ultrasound, which is based on non-ionizing radiation and picks up many of the cancers that are generally missed by mammography. However, the presence of speckle noise in ultrasound images has a negative effect on image interpretation. Noise reduction, inconsistencies in capture and segmentation of lesions still remain challenging open research problems in ultrasound i

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Stampouli, Dafni. "Improved qualification of vascular abnormalities in contrast enhanced magnetic resonance angiographic images." Thesis, University of Central Lancashire, 2009. http://clok.uclan.ac.uk/19967/.

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Stroke is the third leading cause of death in the western world, and the primary cause of adult disability. There is a great need for methods to identify patients at risk of stroke and decide appropriate treatment. The main criterion for identifying patients at risk of stroke is the percentage of the narrowing in the carotid arteries, which lead blood from the heart to the brain, which currently is quantified manually. This project is in collaboration with Blackpool Victoria Hospital and Christies Hospital in Manchester. The aim of this project is to develop software methods to improve compute

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Cheung, Wing Keung. "Computer assisted analysis of contrast enhanced ultrasound images for quantification in vascular diseases." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/46039.

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Contrast enhanced ultrasound (CEUS) with microbubble contrast agents has shown great potential in imaging microvasculature, quantifying perfusion and hence detecting vascular diseases. However, most existing perfusion quantification methods based on image intensity, and are susceptible to confounding factors such as attenuation artefacts. Improving reproducibility is also a key challenge to clinical translation. Therefore, this thesis aims at developing attenuation correction and quantification techniques in CEUS with applications for detection and quantification of microvascular flow / perfus

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Xu, Libo. "GAN-based Automatic Segmentation of Thoracic Aorta from Non-contrast-Enhanced CT Images." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-295428.

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The deep learning-based automatic segmentation methods have developed rapidly in recent years to give a promising performance in the medical image segmentation tasks, which provide clinical medicine with an accurate and fast computer-aided diagnosis method. Generative adversarial networks and their extended frameworks have achieved encouraging results on image-to-image translation problems. In this report, the proposed hybrid network combined cycle-consistent adversarial networks, which transformed contrast-enhanced images from computed tomography angiography to the conventional low-contrast C

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Karim, Rashed. "Segmentation of the Left Atrium and Pulmonary Veins from Contrast-Enhanced MR Images." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/4357.

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Atrial brillation is an important cardiovascular disease causing cardiac malfunction. Theleft atrium and pulmonary veins are the structures most a ected. Radio-frequency catheterablation has now become a standard procedure for correcting atrial brillation. The procedureis minimally invasive and pre-planning the procedure is essential. It is normally required toimage the atrium. Segmentation of the left atrium and pulmonary veins from medical imagesis an important problem and a necessary step for further analysing the left atrium. This dissertation describes techniques for segmenting the left a

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Sukumar, Srinivasan. "ENHANCED MULTISPECTRAL POLARIMETRIC IMAGING TECHNIQUES UTILIZING AN OPTICAL TUMOR PHANTOM." University of Akron / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=akron1124379306.

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Haberkamp, Anke [Verfasser], and Thomas [Akademischer Betreuer] Schmidt. "Enhanced information processing of phobic natural images in participants with specific phobias / Anke Haberkamp. Betreuer: Thomas Schmidt." Kaiserslautern : Technische Universität Kaiserslautern, 2014. http://d-nb.info/1047796295/34.

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Hyde, Justen. "Estimation of three dimensional structure from passport-style photographic images for enhanced face recognition performance in humans." Thesis, University of York, 2006. http://etheses.whiterose.ac.uk/11006/.

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Ahmed, Omar Wahab. "Enhanced flare prediction by advanced feature extraction from solar images : developing automated imaging and machine learning techniques for processing solar images and extracting features from active regions to enable the efficient prediction of solar flares." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5407.

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Space weather has become an international issue due to the catastrophic impact it can have on modern societies. Solar flares are one of the major solar activities that drive space weather and yet their occurrence is not fully understood. Research is required to yield a better understanding of flare occurrence and enable the development of an accurate flare prediction system, which can warn industries most at risk to take preventative measures to mitigate or avoid the effects of space weather. This thesis introduces novel technologies developed by combining advances in statistical physics, imag

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Ahmed, Omar W. "Enhanced flare prediction by advanced feature extraction from solar images : developing automated imaging and machine learning techniques for processing solar images and extracting features from active regions to enable the efficient prediction of solar flares." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5407.

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Space weather has become an international issue due to the catastrophic impact it can have on modern societies. Solar flares are one of the major solar activities that drive space weather and yet their occurrence is not fully understood. Research is required to yield a better understanding of flare occurrence and enable the development of an accurate flare prediction system, which can warn industries most at risk to take preventative measures to mitigate or avoid the effects of space weather. This thesis introduces novel technologies developed by combining advances in statistical physics

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Rahuma, Awatef. "Semantically-enhanced image tagging system." Thesis, De Montfort University, 2013. http://hdl.handle.net/2086/9494.

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In multimedia databases, data are images, audio, video, texts, etc. Research interests in these types of databases have increased in the last decade or so, especially with the advent of the Internet and Semantic Web. Fundamental research issues vary from unified data modelling, retrieval of data items and dynamic nature of updates. The thesis builds on findings in Semantic Web and retrieval techniques and explores novel tagging methods for identifying data items. Tagging systems have become popular which enable the users to add tags to Internet resources such as images, video and audio to make

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Näsholm, Sven Peter. "Ultrasound beams for enhanced image quality." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Det medisinske fakultet, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2163.

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The contents of this thesis consider new methods for generating ultrasound beams for enhanced image quality in medical imaging. The results presented are produced through computer simulations. The thesis consists of an introductory chapter and four papers, which are all intended to be individually readable. Chapter 1 gives a brief overview of ultrasound and medical ultrasound imaging, as well as different aspects of ultrasound image quality and acoustic noise. A non-linear wave equation is presented and analyzed. This equation describes ultrasound propagation within, and interaction with tissu

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23

Minsterová, Alžběta. "Srovnání preklinických DCE-MRI perfusních technik." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242190.

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This diploma thesis deals with DCE-MRI (Dynamic Contrast-Enhanced Magnetic Resonance Imaging) thus one of the contrast magnetic resonance imaging methods. It describes the principle of conventional continuous DCE-MRI, which uses single bolus of contrast agent and further it focuses on the dual bolus contrast agent techniques, especially the interleaved acquisition. The graphical interface for processing Bruker systems data was made. Synthetic data were used to evaluate the influence of this method on the perfusion parameters estimation. Simulations proved that the further the second bolus is f

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SHI, YU. "Enhanced SAR Image Processing Using A Heterogeneous Multiprocessor." Thesis, Linköping University, Department of Computer and Information Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11517.

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<p>Synthetic antenna aperture (SAR) is a pulses focusing airborne radar which can achieve high resolution radar image. A number of image process algorithms have been developed for this kind of radar, but the calculation burden is still heavy. So the image processing of SAR is normally performed “off-line”.</p><p>The Fast Factorized Back Projection (FFBP) algorithm is considered as a computationally efficient algorithm for image formation in SAR, and several applications have been implemented which try to make the process “on-line”.</p><p>CELL Broadband Engine is one of the newest multi-core-pr

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Jain, Mihir. "Enhanced image and video representation for visual recognition." Phd thesis, Université Rennes 1, 2014. http://tel.archives-ouvertes.fr/tel-00996793.

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L'objectif de cette thèse est d'améliorer les représentations des images et des vidéos dans le but d'obtenir une reconnaissance visuelle accrue, tant pour des entités spécifiques que pour des catégories plus génériques. Les contributions de cette thèse portent, pour l'essentiel, sur des méthodes de description du contenu visuel. Nous proposons des méthodes pour la recherche d'image par le contenu ou par des requêtes textuelles, ainsi que des méthodes pour la reconnaissance et la localisation d'action dans des vidéos. En recherche d'image, les contributions se fondent sur des méthodes à base de

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Muda, Zurina binti. "Enhanced image retrieval using spatial information and ontologies." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/301298/.

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New approaches are essential to improve the inference of semantic relationships from low-level features for image annotation and retrieval. Current research on image annotation sometimes represents images in terms of regions and objects, but pays little attention to the spatial relationships between those regions or objects. Annotations are most frequently assigned at the global level, and even when assigned locally the extraction of relational descriptors is often neglected. To enrich the semantic description of the visual information, the use of spatial relationships offers one way to descri

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Miller, Bo E., and Yuzuru Takashima. "Cavity enhanced image recording for holographic data storage." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622715.

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Previously, we proposed and experimentally demonstrated that optical cavities can be employed in recording and readout of plane wave holograms to improve data rates in Holographic Data Storage Systems (HDSS). However, there were some concerns about whether these techniques would be applicable to page based HDSS where signal beams are image bearing and have multiple wave vectors. We have consequently demonstrated cavity enhanced writing of image bearing holograms in Fe: LiNbO3 with a 532 nm wavelength, CW, single mode, DPSS, Nd: YAG, laser with a cavity on the reference arm. The diffraction eff

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Darbhamulla, Lalitha. "A Java image editor and enhancer." CSUSB ScholarWorks, 2004. https://scholarworks.lib.csusb.edu/etd-project/2705.

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The purpose of this project is to develop a Java Applet that provides all the tools needed for creating image fantasies. It lets the user pick a template and an image, and combine them together. The user can then apply image processing techniques such as rotation, zooming, blurring etc according to his/her requirements.

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Gnacek, Matthew. "Convolutional Neural Networks for Enhanced Compression Techniques." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1620139118743853.

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Zhou, Li. "Enhanced Electrospray Ionization for Mass Spectrometry and Ion Mobility Spectrometry." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1384.pdf.

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31

Tope, Michael A. "Performance evaluation of a cooperative diversity enhanced ad hoc network." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Dec%5FTope.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, December 2002.<br>Thesis advisor(s): John C. McEachen, R. Clark Robertson, Daniel M. Rosser. Includes bibliographical references (p. 73-75). Also available online.

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Halterman, R. Ryan. "Observation and tracking of tropical cyclones using resolution enhanced scatterometry /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1667.pdf.

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33

Rößing, Christoph [Verfasser]. "Video and image manipulation for enhanced perception / Christoph Rößing." Ulm : Universität Ulm. Fakultät für Ingenieurwissenschaften und Informatik, 2014. http://d-nb.info/1064002587/34.

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Crocetti, Gregory Robert. "The molecular microbial ecology of enhanced biological phosphorus removal /." St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16512.pdf.

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35

Brattain, Laura. "Enhanced Ultrasound Visualization for Procedure Guidance." Thesis, Harvard University, 2014. http://dissertations.umi.com/gsas.harvard:11649.

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Intra-cardiac procedures often involve fast-moving anatomic structures with large spatial extent and high geometrical complexity. Real-time visualization of the moving structures and instrument-tissue contact is crucial to the success of these procedures. Real-time 3D ultrasound is a promising modality for procedure guidance as it offers improved spatial orientation information relative to 2D ultrasound. Imaging rates at 30 fps enable good visualization of instrument-tissue interactions, far faster than the volumetric imaging alternatives (MR/CT). Unlike fluoroscopy, 3D ultrasound also allows

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Das, Shamiparna. "Microstructure for Enhanced Plasticity and Toughness." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc862825/.

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Magnesium is the lightest metal with a very high specific strength. However, its practical applicability is limited by its toughness and reliability. Mg, being HCP has low ductility. This makes the improvement of toughness a grand challenge in Mg alloys. Friction stir processing (FSP) is a thermomechanical technique used to effect microstructural modification. Here, FSP was utilized to affect the toughness of WE43 sheets through microstructural modification. Room temperature Kahn-type tests were conducted to measure the toughness of WE43 sheets. Microscopic techniques (SEM, TEM) was utilized

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O'Donnell, Chris. "The response of Avena fatua to the enhanced greenhouse effect /." [St. Lucia, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17124.pdf.

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Kani, Bijan. "Enhanced logical adaptive systems for image processing and pattern recognition." Thesis, Brunel University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358406.

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39

Omar, Zaid Bin. "Signal processing algorithms for enhanced image fusion performance and assessment." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/10660.

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The dissertation presents several signal processing algorithms for image fusion in noisy multimodal conditions. It introduces a novel image fusion method which performs well for image sets heavily corrupted by noise. As opposed to current image fusion schemes, the method has no requirements for a priori knowledge of the noise component. The image is decomposed with Chebyshev polynomials (CP) being used as basis functions to perform fusion at feature level. The properties of CP, namely fast convergence and smooth approximation, renders it ideal for heuristic and indiscriminate denoising fusion

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Joshi, Amit. "Adaptive finite element methods for fluorescence enhanced optical tomography." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4419.

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Fluorescence enhanced optical tomography is a promising molecular imaging modality which employs a near infrared fluorescent molecule as an imaging agent and time-dependent measurements of fluorescent light propagation and generation. In this dissertation a novel fluorescence tomography algorithm is proposed to reconstruct images of targets contrasted by fluorescence within the tissues from boundary fluorescence emission measurements. An adaptive finite element based reconstruction algorithm for high resolution, fluorescence tomography was developed and validated with non-contact, planewave fr

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Lloyd, Natasha. "Clutter measurement and reduction for enhanced information visualization." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-011206-232808/.

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Griffiths, Thomas Richard. "An Enhanced Data Model and Tools for Analysis and Visualization of Levee Simulations." Diss., CLICK HERE for online access, 2010. http://contentdm.lib.byu.edu/ETD/image/etd3477.pdf.

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Sahu, Amit K. "Objective assessment of image quality (OAIQ) in fluorescence-enhanced optical imaging." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1068.

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Hughes-Hallett, Archie. "The image enhanced operating environment in robot assisted laparoscopic partial nephrectomy." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/51558.

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In the last twenty-five years surgical practice has undergone radical change. Although this change has heralded improved patient outcomes it has also presented a new set of problems centred around the reduction in sensory inputs received by the modern surgeon. A potential solution to mitigate for this sensory loss is image guidance. The thesis has its heart four guiding aims: 1) To define the window of opportunity for the development of an image guidance platform for intra-abdominal MIS. 2) To establish whether there is a user need for image guidance in RAPN. 3) To better understand the fundam

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Koglin, Ryan W. "Efficient Image Processing Techniques for Enhanced Visualization of Brain Tumor Margins." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1415835138.

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Kale, Mehmet Cemil. "Multispectral co-occurrence analysis for medical image processing." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1195500453.

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Matthews, Kathryn F. "The Art of Adjustment." VCU Scholars Compass, 2006. http://hdl.handle.net/10156/1863.

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Bauer, Daniel Ryan. "Thermoacoustic Imaging and Spectroscopy for Enhanced Cancer Diagnostics." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/265375.

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Early detection of cancer is paramount for improved patient survival. This dissertation presents work developing imaging techniques to improve cancer diagnostics and detection utilizing light and microwave induced thermoacoustic imaging. In the second chapter, the well-established pre-clinical mouse window chamber model is interfaced with simultaneously acquired high-resolution pulse echo (PE) ultrasound and photoacoustic (PA) imaging. Co-registered PE and PA imaging, coupled with developed image segmentation algorithms, are used to quantitatively track and monitor the size, shape, heterogenei

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Mosbruger, Michael C. "Alternative audio solution to enhance immersions in deployable synthetic environments." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FMosbruger.pdf.

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Thesis (M.S. in Modeling, Virtual Environments, and Simulation)--Naval Postgraduate School, September 2003.<br>Thesis advisor(s): Russell D. Shilling, Rudolph P. Darken. Includes bibliographical references (p. 169-172). Also available online.

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Daemi, Bita. "Enhanced image analysis, a tool for precision metrology in the micro and macro world." Doctoral thesis, KTH, Industriell produktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-207594.

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The need for high speed and cost efficient inspection in manufacturing lineshas led to a vast usage of camera-based vision systems. The performance ofthese systems is sufficient to determine shape and size, but hardly to an accuracylevel comparable with traditional metrology tools. To achieve highprecision shape/position/defect measurements, the camera techniques haveto be combined with high performance image metrology techniques whichare developed and adapted to the manufactured components. The focus ofthis thesis is the application of enhanced image analysis as a tool for highprecision metro

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