Dissertations / Theses: 'Openfl'

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Kvist, Torbjörn. "Second screen on mobile crossplatform." Thesis, Linköpings universitet, Interaktiva och kognitiva system, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-107614.

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Utveckling av mobila applikationer är idag allt svårare för utvecklare, eftersom det finns många olika enheter och operativsystem. Detta examensarbete kommer gå igenom hur multiplattformsramverk kan användas för att utveckla och implementera en second screen som komplement till andra enheter. Plattformarna kommer utvärderas med avseende på hur komplext ded är att implementera lösningen samt hur de presterar under olika förhållanden. De multiplattformsramverk som kommer utvärderas är OpenFL och PhoneGap.
Development of mobile applications today are increasingly difficult for developers, because there are many different devices and operating systems. This thesis will look at how a cross-platform framework can be used to develop and implement a second screen as a complement to other devices. he platforms will be evaluated in terms of how complex it is to implement the solution and how they perform under different conditions. The cross-platform frameworks that will be evaluated is OpenFL and PhoneGap.

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Örtenberg, Alexander. "Parallelization of DIRA and CTmod Using OpenMP and OpenCL." Thesis, Linköpings universitet, Informationskodning, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119183.

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Parallelization is the answer to the ever-growing demands of computing power by taking advantage of multi-core processor technology and modern many-core graphics compute units. Multi-core CPUs and many-core GPUs have the potential to substantially reduce the execution time of a program but it is often a challenging task to ensure that all available hardware is utilized. OpenMP and OpenCL are two parallel programming frameworks that have been developed to allow programmers to focus on high-level parallelism rather than dealing with low-level thread creation and management. This thesis applies these frameworks to the area of computed tomography by parallelizing the image reconstruction algorithm DIRA and the photon transport simulation toolkit CTmod. DIRA is a model-based iterative reconstruction algorithm in dual-energy computed tomography, which has the potential to improve the accuracy of dose planning in radiation therapy. CTmod is a toolkit for simulating primary and scatter projections in computed tomography to optimize scanner design and image reconstruction algorithms. The results presented in this thesis show that parallelization combined with computational optimization substantially decreased execution times of these codes. For DIRA the execution time was reduced from two minutes to just eight seconds when using four iterations and a 16-core CPU so a speedup of 15 was achieved. CTmod produced similar results with a speedup of 14 when using a 16-core CPU. The results also showed that for these particular problems GPU computing was not the best solution.

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Ali, Akhtar. "Comparative study of parallel programming models for multicore computing." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94296.

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Shared memory multi-core processor technology has seen a drastic developmentwith faster and increasing number of processors per chip. This newarchitecture challenges computer programmers to write code that scales overthese many cores to exploit full computational power of these machines.Shared-memory parallel programming paradigms such as OpenMP and IntelThreading Building Blocks (TBB) are two recognized models that offerhigher level of abstraction, shields programmers from low level detailsof thread management and scales computation over all available resources.At the same time, need for high performance power-ecient computing iscompelling developers to exploit GPGPU computing due to GPU's massivecomputational power and comparatively faster multi-core growth. Thistrend leads to systems with heterogeneous architectures containing multicoreCPUs and one or more programmable accelerators such as programmableGPUs. There exist dierent programming models to program these architecturesand code written for one architecture is often not portable to anotherarchitecture. OpenCL is a relatively new industry standard framework, de-ned by Khronos group, which addresses the portability issue. It oers aportable interface to exploit the computational power of a heterogeneous setof processors such as CPUs, GPUs, DSP processors and other accelerators. In this work, we evaluate the eectiveness of OpenCL for programmingmulti-core CPUs in a comparative case study with two CPU specic stableframeworks, OpenMP and Intel TBB, for ve benchmark applicationsnamely matrix multiply, LU decomposition, image convolution, Pi value approximationand image histogram generation. The evaluation includes aperformance comparison of the three frameworks and a study of the relativeeects of applying compiler optimizations on performance numbers.OpenCL performance on two vendor-dependent platforms Intel and AMD,is also evaluated. Then the same OpenCL code is ported to a modern GPUand its code correctness and performance portability is investigated. Finally,usability experience of coding using the three multi-core frameworksis presented.

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Sörman, Torbjörn. "Comparison of Technologies for General-Purpose Computing on Graphics Processing Units." Thesis, Linköpings universitet, Informationskodning, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-125882.

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The computational capacity of graphics cards for general-purpose computinghave progressed fast over the last decade. A major reason is computational heavycomputer games, where standard of performance and high quality graphics constantlyrise. Another reason is better suitable technologies for programming thegraphics cards. Combined, the product is high raw performance devices andmeans to access that performance. This thesis investigates some of the currenttechnologies for general-purpose computing on graphics processing units. Technologiesare primarily compared by means of benchmarking performance andsecondarily by factors concerning programming and implementation. The choiceof technology can have a large impact on performance. The benchmark applicationfound the difference in execution time of the fastest technology, CUDA, comparedto the slowest, OpenCL, to be twice a factor of two. The benchmark applicationalso found out that the older technologies, OpenGL and DirectX, are competitivewith CUDA and OpenCL in terms of resulting raw performance.

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Balasubramanian, ArunKumar. "Benchmarking of Vision-Based Prototyping and Testing Tools." Master's thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-229999.

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The demand for Advanced Driver Assistance System (ADAS) applications is increasing day by day and their development requires efficient prototyping and real time testing. ADTF (Automotive Data and Time Triggered Framework) is a software tool from Elektrobit which is used for Development, Validation and Visualization of Vision based applications, mainly for ADAS and Autonomous driving. With the help of ADTF tool, Image or Video data can be recorded and visualized and also the testing of data can be processed both on-line and off-line. The development of ADAS applications needs image and video processing and the algorithm has to be highly efficient and must satisfy Real-time requirements. The main objective of this research would be to integrate OpenCV library with ADTF cross platform. OpenCV libraries provide efficient image processing algorithms which can be used with ADTF for quick benchmarking and testing. An ADTF filter framework has been developed where the OpenCV algorithms can be directly used and the testing of the framework is carried out with .DAT and image files with a modular approach. CMake is also explained in this thesis to build the system with ease of use. The ADTF filters are developed in Microsoft Visual Studio 2010 in C++ and OpenMP API are used for Parallel programming approach.

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Sardar, Raham, and Usman Fazal. "Quality Assurance Techniques in OpenUP (Open Unified Process)." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-67579.

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Agile methods change the software processes. Agile processes such as Scrum, ExtremeProgramming (XP), Open Unified Process (OpenUP) etc. have techniques that improve softwarequality. No doubt that the purpose of these techniques is to inject quality assurance into theproject under development. This thesis presents quality assurance techniques in Open UnifiedProcess (OpenUP) along with comparative study to extreme programming (XP) for agilesoftware development. OpenUP is an agile and unified process that contains the minimal set ofpractices that help teams to be more effective in developing software. It assists to achieve qualityby an iterative and incremental approach with artifacts, checklists, guidelines, disciplines androles. On the other side XP emphasizes on values such as communication, feedback, respect,and courage. In addition, XP prescribes a collection of techniques, which aim to improvesoftware quality. Both these processes have the same purpose, to develop software that meets the stakeholder’sneeds and expectations, however they uses different approaches to achieve their goals. Thisthesis compares both processes in four different points of view, by comparing their qualitytechniques, focus in time, and cost of usage and social perspective. We have proposed an extrarole of the quality coordinator (QC) in OpenUP/XP. QC can support and coordinate project inall quality assurance activities. The objective of an extra role is to use the knowledge of QC toachieve highest possible product quality in software development process.Keywords: Agile Development, Quality assurance (QA), Open unified process (OpenUP),extreme programming (XP), Quality coordinator (QC)

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Melichar, Vojtěch. "Interaktivní simulace chování tkaniny akcelerovaná pomocí GPU." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2016. http://www.nusl.cz/ntk/nusl-255412.

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This master thesis deals with interactive cloth simulation accelerated by GPU. In the first part there is a description of all technologies used during implementation of a program. The second part discusses various simulation methods. It is mainly focused on particle systems as a most used method. These parts are followed by a design of the program, which is implemented as a part of this thesis. The program was implemented in four variants. The first variant is CPU implementation, which was then optimalized with OpenMP. CUDA implementation is based on these implementations. Last variant implemented in this thesis is optimized CUDA implementation. All these implementations are evaluated from compute complexity point of view and suitability for real time graphics.

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Nordvall, Thommi. "Användning av datorns grafikkort för beräkningar med användning av OpenCL (Open Computing Language)." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-66784.

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SAAB Security and defense solutions i Järfälla har ett system som används av militären för övervakning av flygplan. Systemet visar på en datorskärm en karta över Europa där flygplanen visas med markeringar från data som samlats in av radars. Då data samlas in med en låg frekvens visas ytterligare en markering som kallas målspår. Dessa målspår beräknas fram med tunga matematiska beräkningar och sköts av datorns processor. Det finns ett önskemål om att flytta dessa beräkningar till datorns Grafikkort med hjälp av OpenCL och därmed frigöra processorns resurser. OpenCL har implementerats med två olika Java bindings och prestandaskillnader mellan dessa samt de ursprungliga beräkningarna har undersökts. Resultatet visar att grafikkortet är överlägsen processorn på beräkningar som kallas för Single Instruction Multiple Data (SIMD) men att det kostar mycket tid att kopiera minne från grafikkortet tillbaka till värddatorn efter att beräkningarna utförts. Den Javabinding med namn JavaCL visar upp ett bra resultat vid kopiering av minne. detta beror med största anledning på att man använder Javas modernare datastrukturer Java NIO buffrar.

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Potěšil, Josef. "Akcelerace kryptografie pomocí GPU." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-237073.

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The reader will be familiar with selected concepts of cryptography consited in this work. AES algorithm was selected in conjunction with the description of architecture and software for programming graphic cards (CUDA, OpenCL), in order to create its GPU-accelerated version. This thesis tries to map APIs for communication with crypto-coprocessors, which exist in kernels of Linux/BSD operating systems (CryptoAPI, OCF). It examines this support in the cross-platform OpenSSL library. Subsequently, the work discusses the implementation details, achieved results and integration with OpenSSL library. The conclusion suggests how the developed application could be used and briefly suggests its usage directly by the operating system kernel.

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Cadavez, Tiago João Gonçalves. "Análise de imagens tomográficas: visualização e paralelização de processamento." Master's thesis, FCT - UNL, 2008. http://hdl.handle.net/10362/2791.

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Dissertação de Mestrado em Engenharia Informática
A micro-tomografia de raios-X por radiação do sincrotrão é uma técnica bem desenvolvida no domínio da medicina, e mais recentemente, foi adoptada em outras áreas, nomeadamente na Engenharia de Materiais. É uma técnica não destrutiva, que permite analisar a estrutura interna de componentes. O objecto em estudo é alvo de um feixe de radiação por toda a superfície que penetra no material, e um conjunto de detectores vai registando a intensidade dos raios à medida que o objecto vai rodando. Este procedimento origina um ficheiro de dados, que pode ter uma dimensão da ordem dos gigabytes e que necessita de ser processado para visualização da estrutura interna. Atendendo ao grande volume de dados e à complexidade de alguns algoritmos de processamento, certos tipos de processamentos podem mesmo levar dias. O programa do cientista francês Gerard Vignoles, Tritom, processando os dados tomográficos sequencialmente, demorava muito tempo em algumas operações. Num esforço anterior, Paulo Quaresma optimizou e paralelizou algumas das operações mais demoradas, usando um agregado (clusters) de computadores e programação baseada em troca de mensagens. Nesta tese, paralelizaram-se as operações mais pesadas do Tritom utilizando o modelo de memória partilhada, concretizado através da ferramenta OpenMP. Esta aceleração de obtenção de resultados é vantajosa para a investigação sobre os materiais e permite tirar partido da introdução de multi-processadores nas arquitecturas de computadores pessoais comuns. Foram realizados testes para análise das melhorias de tempo de execução com este método. Nesta tese, também se integrou também o Tritom num ambiente de visualização de dados gráfico e interactivo de nome OpenDX que facilita muito a utilização do programa aos menos experientes. O utilizador pode escolher os processamentos que deseja realizar sob a forma de módulos e pela ordem que quiser tudo num ambiente gráfico. Permite também a visualização tridimensional de dados que se torna vital para percepcionar alguns fenómenos nos objectos de estudo. Foram também criados alguns novos módulos a pedido dos investigadores de Engenharia de Materiais. O Tritom, assim paralelizado, oferecerá aos cientistas da área de materiais uma boa ferramenta de análise de imagens tomográficas com interacção simples e intuitiva. Poderão, dispor de uma mais-valia para leituras rápidas dos seus objectos de estudo sem recorrerem a clusters ou configurações de computadores complexas e pouco acessíveis.

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Afonso, Mário João da Costa. "Clopencl (opencl para ambiente cluster)." Master's thesis, Instituto Politécnico de Bragança, Escola Superior de Tecnologia e Gestão, 2012. http://hdl.handle.net/10198/8066.

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Nos dias correntes, as pessoas estão cada vez mais familiarizadas com a necessidade de um aumento dos recursos computacionais. Com isto, torna-se evidente a junção de dispositivos, como CPUs e GPUs de fabricantes diferentes, com a finalidade de preencher o mesmo propósito. Este nível de heterogeneidade é trazida pela tecnologia OpenCL. O trabalho aqui desenvolvido abrange o High-Performance Computing e o OpenCL, com o resultado do clOpenCL. O objetivo do clOpenCL é suportar o conjunto de dispositivos OpenCL num ambiente cluster. O clOpenCL foi construído sobre duas vertentes, estando estas inteiramente ligadas ao tipo de tecnologia utilizada no processo de comunicação entre a biblioteca e o daemon. A primeira vertente da API foi construída sobre a tecnologia de comunicação socket TCP/IP e a segunda foi desenvolvida sobre o Open-MX. Ambos os modelos do clOpenCL estão ligados à tecnologia de comunicação e à forma como é suportada a comunicação ao nível de programação. No decorrer do trabalho serão apresentadas todas as caraterísticas integradas pelo clOpenCL e todos os seus recursos abrangidos. Irá também ser analisada a performance obtida para cada vertente do clOpenCL, em termos de utilização de largura de banda e com a leitura e escrita em buffers remotos. In the current days, people are increasingly acquainted with the need for an increase computing resources. It becomes evident the combination of devices such as CPUs and GPUs from different vendors, with the task of fulfill the same purpose. This level of heterogeneity, is brought by OpenCL technology. This work covers the High-Performance Computing and OpenCL, with the result of clOpenCL. The main goal of clOpenCL is to support a set of OpenCL devices in a cluster environment. The clOpenCL was built in two branches, fully connected with the type of technology used in the comunication process, between the library and the daemon. The first version of the API was built on socket TCP/IP communication technology, and the second one was developed on the Open-MX tecnology. Both clOpenCL models are connected to the communication technology and the way that communication is supported at programming level. Throughout this work, we will present all the clOpenCL integrated features and all its covered resources. We will also analyze the performance obtained for each side of clOpenCL in terms of bandwidth usage, through the reading and writing of remote buffers.

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Sohanghpurwala, Ali Asgar Ali Akbar. "OpenPR: An Open-Source Partial Reconfiguration Tool-Kit for Xilinx FPGAs." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/36348.

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The Xilinx Partial Reconfiguration tool kits have been instrumental for performing a wide variety of research on Xilinx FPGAs. These tool kits provide a methodology for creating rectangular partial reconfiguration modules that can be swapped in and out of a static baseline design with one or more PR slots. This thesis presents a new PR toolkit called OpenPR that, for starters, provides similar functionality to the Xilinx PR tool kits. The distinguishing feature of this toolkit is that it is being released as open source, and is intended to be customizable to the needs of researchers. OpenPR has been designed to be easy to use, extensible, portable, and compatible with a wide range of Xilinx software and devices. Aside from supporting the slot-based PR paradigm, OpenPR also provides a solid base for further research into partial reconfiguration and FPGA productivity oriented design tools.
Master of Science

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Hedström, Mathias. "En jämförelsestudie mellan OpenGL 4.3, OpenGL ES 3.0 och WebGL 1.0." Thesis, Umeå universitet, Institutionen för datavetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-81114.

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OpenGL is a standard API that is used to manage 3D graphics on desktop computers. Although OpenGL is independent of customized hardware it’s not suitable for all kinds of devices. Therefore both OpenGL ES andWebGL was created. These can be viewed as subsets of OpenGL. This report presents the differences of importance to both developers and users, between OpenGL 4.3, OpenGL ES 3.0 and WebGL 1.0. are the rendering pipeline and the texture handling. As the reader will see, it is mainly the rendering pipeline that affects most of the performance and the graphical processing. The report also drives a discussion of how the various OpenGL groups are related to each other and how a possible future can look like. The evidence indicates that OpenGL will be replaced by OpenGL ES and WebGL.

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Fedorko, Matúš. "Simulace tekutin v reálném čase." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2015. http://www.nusl.cz/ntk/nusl-234957.

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The primary concern of this work is real-time fluid simulation on modern programmable graphics hardware. It starts by introducing fundamental fluid simulation principles with focus on Smoothed particle hydrodynamics technique. The following discussion then provides a brief introduction to OpenCL as well as contemporary GPU hardware and outlines their programming specifics in comparison with CPUs. Finally, the last two chapters of this work, detail the problem analysis and its implementation.

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Heidbrink, Scott Jared. "A Large-Scale Analysis of How OpenSSL Is Used in Open-Source Software." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6716.

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As vulnerabilities become more common the security of applications are coming under increased scrutiny. In regards to Internet security, recent work discovers that many vulnerabilities are caused by TLS library misuse. This misuse is attributed to large and confusing APIs and developer misunderstanding of security generally. Due to these problems there is a desire for simplified TLS libraries and security handling. However, as of yet there is no analysis of how the existing APIs are used, beyond how incorrect usage motivates the need to replace them. We provide an analysis of contemporary usage of OpenSSL across 410 popular secure applications. These insights will inform the security community as it addresses TLS library redesign.

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Sundholm, Erik. "Distance Fields Acceleratedwith OpenCL." Thesis, Umeå University, Department of Computing Science, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-34953.

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An important task in any graphical simulation is the collision detection between the objects in the simulation. It is desirable to have a good general method for collision detection with high performance. This thesis describes an implementation of a collision detection method that uses distance fields to detect collisions. This method is quite robust and able to detect collisions between most possible shapes. It is also capable of computing contact data for collisions. A problem with distance fields is that the performance cost for making a distance field is quite extensive. It is therefore customary to have some way of accelerating the computation of the distance field (usually by only computing select parts of the field). The application implemented in this thesis solves this performance problem by using the parallel framework OpenCL for accelerating the construction of the field.OpenCL enables programmers to execute code on the GPU. The GPU is highly data parallel and a huge increase in performance can be obtained by letting the GPU handle the computations associated with the initiation of the field.

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Ahlgren, Hannes. "Graph visualization with OpenGL." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-22.

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Vizz3D is a 3D graphics code analysis tool, developed at Växjö University that optionally can use Java3D or OpenGL. However, initially Java3D was the only programming interface used. No other version was considered. Therefore the applications structure was built with the Java3D way of thought in mind. But code visualization with 3D graphics can be a demanding task for the computers processor and its graphics hardware and Java3D is known to be somewhat inefficient. So an OpenGL version was introduced.

This thesis reflects on the work restructuring the application’s code to fit both versions within Vizz3D in a structured and object-oriented way. The thesis shows the efforts to be taken to make an existing ever evolving tool easily extendible to other API’s. Additional aspects of OpenGL specific implementations are discussed throughout the thesis.

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Hort, Pavel. "Vizualizace molekul pomocí OpenGL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-236988.

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This thesis considers atom`s attributes, which affects shape of molecules. It describes rules that are basic for molecule creation. This text features basic attributes and rules, which affects the final shape of molecule. Next part of this text explains several ways to display molecule. Following parts of this thesis describes several ways how to store and represent atom and molecules in computer technology along with solution of these problems that are used for this thesis.

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Ducao, Arlene (Arlene Brigoli). "OpenIR [Open Infrared] : enhancing environmental monitoring through accessible remote sensing, in Indonesia and beyond." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82423.

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Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references.
As the human landscape changes ever more rapidly, environmental change accelerates. Much environmental information is publicly available as infrared satellite data. However, for the general user, this information is difficult to obtain, and even more difficult to interpret. With this in mind, my team and I launched OpenIR (Open Infrared), an ICT (Information Communication Technology) that provides geo-located IR (infrared) satellite data as ondemand map layers, automates environmental feature classification, experiments with flood risk mapping, and interfaces IR data with crowd- and citizen-maps. OpenIR's initial use case is emergency management and environmental monitoring in the economically developing and ecologically vulnerable archipelago of Indonesia, where we conduced initial usability tests in January 2013.
by Arlene Ducao.
S.M.

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Belica, Peter. "Knihovna pro zpracování dokumentů OpenXML." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2009. http://www.nusl.cz/ntk/nusl-235493.

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This thesis describes the type of documents named Office Open XML, which are commonly known as OpenXML. Basic properties of these documents as well as their structure are explained. There is also an introduction to other technologies such as DOM and XHTML beacause of their inevitability in realization. Program library is designed to read these documents, build a DOM structure for them and export it as a XHTML file.

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Fagerlund, Olav Aanes. "Multi-core programming with OpenCL: performance and portability : OpenCL in a memory bound scenario." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for datateknikk og informasjonsvitenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11119.

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With the advent of multi-core processors desktop computers have become multiprocessors requiring parallel programming to be utilized efficiently. Efficient and portable parallel programming of future multi-core processors and GPUs is one of todays most important challenges within computer science. Okuda Laboratory at The University of Tokyo in Japan focuses on solving engineering challenges with parallel machines. A multi-core FEM solver package is under development within this laboratory that utilizes both standard CPUs and GPUs.This student project, given by Department of Computer and Information Science (IDI) at NTNU in cooperation with Okuda Laboratory at The University of Tokyo, seeks to explore the promising path towards more platform independent parallel programming given by the OpenCL library, runtime system and language. And, in doing so, contributing to their FEM solver software CUKr by making it utilize OpenCL.

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Ye, Chunyan. "Extensions to OpenGL for CAGD." [Johnson City, Tenn. : East Tennessee State University], 2003. http://etd-submit.etsu.edu/etd/theses/available/etd-0331103-180909/unrestricted/YeC042403a.pdf.

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Thesis (M.S.)--East Tennessee State University, 2003.
Title from electronic submission form. ETSU ETD database URN: etd-0331103-180909. Includes bibliographical references. Also available via Internet at the UMI web site.

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Belgiovine, Mauro. "Accelerare l'algebra lineare con OpenCL." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5079/.

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Chornay, Nicholas J. "An OpenGL backend for Halide." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84881.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 37).
High performance image processing requires not only an efficient underlying algorithm but also an implementation tailored to maximally exploit the available hardware resources. In practice, this requires low-level optimization, platform-specific instructions, and, when available, the use of special purpose hardware such as GPU. Halide is a domain-specific programming language targeted at image processing applications. Its programming model decouples an algorithm from the details of its execution, vastly simplifying development and optimization. We present an OpenGL backend for the Halide compiler, which enables Halide programs to run GPU computation on devices that support the OpenGL API. In particular, this paves the way for GPU computation on mobile devices using OpenGL ES. In doing so, we demonstrate how a general image processing framework can be built upon functionality designed for 3D graphics applications.
by Nicholas J. Chornay.
M.Eng.

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Buček, Antonín. "Demonstrace pokročilých technik využívajících OpenGL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235992.

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This thesis demonstrates advanced techniques using OpenGL. The work is conceived as a demo without any size restrictions. It focuses on creating 3D world, which consists of inner rooms complex. Some additional interesting objects, lighting and shadows enrich the rooms. Particle systems, which were used to create explosions, smokes and some other particle effects are described in the thesis, too. 3D machine models fight between themselves using laser beams and form the story of the demo. Important part of the work is a movement model which is applied to both models and avatar. Sound track completes the demo.

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Dokoupil, Martin. "3D projekce fotek v OpenGL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-237271.

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This document describes implementation of photo slideshow editor. This editor can be used to create dynamic sequences from taken photos. Image taken by camera is projected onto three-dimensional sphere and drawn to screen. Then it is posible to rotate and zoom camera over image. Visual output of this editor makes moving over image more real. If panoramic image is used, user is able to free look around. This document describes method which can translate two-dimensional coordinates to three-dimensional space. Shows how to use transformations for moving camera and methods to implement camera zoom. Contains description of user interface and also mentions extensions that were implemented in editor.

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Buchta, David. "3D herní svět v OpenGL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2017. http://www.nusl.cz/ntk/nusl-363872.

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Focus of this master's thesis is a study of modern techniques in computer graphics and designing and developing custom application based on which could be developed new game engine. In this thesis are highlighted techniques for creating large terrains, advanced shadows, physically based sky rendering and drawing large set of objects. Finally, performance testing of these modules is performed.

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Ingelborn, Marcus. "Rendering av geodata med OpenGL." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-286289.

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Den här studien undersökte om det är lönsamt eller ej att implementera hård-varustöd, med hjälp av OpenGL, för rendering av geografisk data. I detta fall innebar det skapande av kartbilder med tillfälliga föremål positionerade och inritade. Föremålen var under konstant förändring och en bildruta kunde inte antas se likadan ut som nästa. För att besvara på frågan användes en testmiljö hos företaget Saab och den öppna programvaran Geotools. En aktionsforskning genomfördes där en ny ren-deringsmodul till Geotools implementerades. Den nya och den föregående ren-deringsmodulen, från Geotools, testades och deras renderingstider uppmättes. Därefter analyserades mätresultaten och jämfördes med statistiska metoder. Renderingstiden för en bild i den tidigare renderingsmodulen tog i snitt mellan 481 och 495 ms med sannolikhet på 99,9%. Renderingstiden utfördes i snitt med den nya renderingsmodulen på mellan 145 och 150 ms med samma sannolikhet. Inom ett konfidensintervall på 99,9% minskade snittrenderingstiden med mellan 333 och 347 ms för den nyutvecklade modulen med hårdvarustöd.

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Nilsson, Eric. "Paravirtualizing OpenGL ES in Simics." Thesis, Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3979.

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CONTEXT. Full-system simulators provide benefits to developers in terms of a more rapid development cycle; since development may begin prior to that of next-generation hardware being available. However, there is a distinct lack of graphics virtualization in industry-grade virtual platforms, leading to performance issues that may obfuscate the benefits virtual platforms otherwise have over execution on actual hardware. OBJECTIVES. This dissertation concerns the implementation of graphics acceleration by the means of paravirtualizing OpenGL ES 2.0 in the Simics full-system simulator. Furthermore, this study illustrates the benefits and drawbacks of paravirtualized methodology, in addition to performance analysis and comparison with the Android emulator; which likewise utilize paravirtualization to accelerate simulated graphics. METHODS. In this study, we propose a solution for paravirtualized graphics using Magic Instructions; the implementation of which is subsequently described. Additionally, three benchmarks are devised to stress key points in the developed solution; comprising areas such as inter-system communication latency and bandwidth. Additionally, the solution is evaluated based on computationally intensive applications. RESULTS. For the purpose of this study, elapsed frame times for respective benchmarks are collected and compared with four platforms; i.e. the hardware accelerated Host machine, the paravirtualized Android emulator, the software rasterized Simics- and the paravirtualized Simics platforms. CONCLUSIONS. This thesis establishes paravirtualization as a feasible method to achieve accelerated graphics in virtual platforms. The study shows graphics acceleration of up to 34 times of that of its software rasterized counterparts. Furthermore, the study establishes magic instructions as the primary bottleneck of communication latency in the devised solution. Classification: E.1.1 [Software infrastructure]: Virtual machines; K.6.4 [Graphics systems and interfaces]: Graphics processors; N.1.0 [Companies]: Intel Corporation; Keywords: Paravirtualization; Simics;
Arkitekturella simulatorer förser utvecklare med medel till snabbare utvecklingscykler genom att tillåta utveckling av mjukvara för nya plattformar innan dessa finns tillgängliga. Dessvärre finns det få lösningar för GPU-accelerering i moderna virtuella plattformar; vilket leder till prestandaproblem som kan hämma de fördelar som virtuella plattformar har över exekvering på hårdvara. Denna uppsats angår implementering av grafikaccelerering genom paravirtualisering av OpenGL ES 2.0 i systemsimulatorn Simics. Studien sammanfattar fördelar och nackdelar av paravirtualiserade metoder, med hänsyn till prestandaanalys och jämförelse med Android-emulatorn; som också nyttjar paravirtualisering för att accelerera simulerad grafik. Vi föreslår grafikaccelering genom paravirtualisering m.h.a. magiska instruktioner; vars implementation sammanfattas i uppsatsen. Vidare presenteras tre utvärderingsprov vars syfte är att påfresta nyckelpunkter i den paravirtualiserade lösningen, så som systemlatens och bandbredd i kommunikation mellan simulering och den verkliga världen. Lösningen evalueras även baserat på ett prestandakrävande utvärderingstest. För experimentet, som presenteras i denna uppsats, samlas uppdateringsfrekvens för de grafiska utvärderingstesten och jämförs med exekvering på fyra olika plattformar. Dessa plattformar omfattar ett hårdvaruaccelerat referens-system, paravirtualiserad simulering m.h.a. Android-emulator, mjukvarurastrerad Simics-simulering, och paravirtualiserad Simics-simulering. Uppsatsen fastställer paravirtualisering som en god metod för att uppnå grafikaccelering i virtuella plattformar. Studien påvisar prestandaförbättringar motsvarande 34 gånger jämförelsevis med dess mjukvarurastrerade motpart. Vidare presenterar uppsatsen magiska instruktioner som den primära flaskhalsen i den utvecklade lösningen.

OFFICE eric.nilsson@intel.com +46 8 690 0734 HOME EricNNilsson@gmail.com +46 73 656 4535

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Sundholm, Erik. "Distance Fields Accelerated with OpenCL." Thesis, Umeå universitet, Institutionen för datavetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-34953.

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An important task in any graphical simulation is the collision detection between the objects in the simulation. It is desirable to have a good general method for collision detection with high performance. This thesis describes an implementation of a collision detection method that uses distance fields to detect collisions. This method is quite robust and able to detect collisions between most possible shapes. It is also capable of computing contact data for collisions. A problem with distance fields is that the performance cost for making a distance field is quite extensive. It is therefore customary to have some way of accelerating the computation of the distance field (usually by only computing select parts of the field). The application implemented in this thesis solves this performance problem by using the parallel framework OpenCL for accelerating the construction of the field.OpenCL enables programmers to execute code on the GPU. The GPU is highly data parallel and a huge increase in performance can be obtained by letting the GPU handle the computations associated with the initiation of the field.

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Rogeiro, João Pedro Martins. "Geometry based visualization with OpenCL." Master's thesis, Faculdade de Ciências e Tecnologia, 2011. http://hdl.handle.net/10362/7951.

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Dissertação para obtenção do Grau de Mestre em Engenharia Informática
This work targets the design and implementation of an isosurface extraction solution capable of handling large datasets. The Marching Cubes algorithm is the method used to extract the isosurfaces. These are graphical representations of points with a constant value (e.g. matter density) within volumetric datasets. A very useful approach to visualize particular regions of such data. One of the major goals of this work is to get a significant performance improvement, compared to the currently available CPU solutions. The OpenCL framework is used to accelerate the solution. This framework is an open standard for parallel programming of heterogeneous systems recently proposed. Unlike previous programming frameworks for GPUs such as CUDA, with OpenCL the workload can be distributed among CPUs, GPUs, DSPs, and other similar microprocessors.

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Weiße, Carsten, and Rene Stöckel. "Quake II meets Java." Universitätsbibliothek Chemnitz, 2005. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200500863.

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Franke, Maik. "Managementtool für InfiniBand." Thesis, Universitätsbibliothek Chemnitz, 2005. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200500063.

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Janeček, Martin. "Soustava kamer jako stereoskopický senzor pro měření vzdálenosti v reálném čase." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220332.

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Project shows calibration stereoscopic sensor. Also describes basic methods stereo-corespodation using library OpenCV. Project contains calculations of disparity maps on CPU or graphic card(using library OpenCL).

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Damalio, Douglas Brito. "Proposal of a strategy for monitoring and management of virtual networks based on open standard openflow." Universidade Federal de Pernambuco, 2011. https://repositorio.ufpe.br/handle/123456789/2423.

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Made available in DSpace on 2014-06-12T15:58:06Z (GMT). No. of bitstreams: 2 arquivo3252_1.pdf: 2382561 bytes, checksum: c2a06bbc48d03850db39ab0f6ef2859e (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2011
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Este trabalho apresenta uma proposta para gerenciamento e monitoramento de redes virtuais através da adaptação do Nagios, uma ferramenta de gerência e monitoramento amplamente utilizada em datacenters por administradores de rede. Esta adaptação foi implementada através da criação de um plug-in que coleta dados relevantes de switches virtuais realizando inferências de estados de disponibilidade destes switches. Para verificação da usabilidade do plug-in, foi criada uma rede virtual utilizando o software de padrão aberto Openflow e OpenvSwitch em conjunto com o NOX, além da criação de máquinas virtuais sobre o virtualizador KVM com o auxílio da biblioteca libvirt para criação das máquinas virtuais e interfaces virtuais

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Xiang, Changsheng. "A New Way for Mapping Texture onto 3D Face Model." University of Dayton / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1447762557.

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Reichel, Christian. "OpenXL : an adaptable Web Service middleware." kostenfrei, 2007. http://e-collection.ethbib.ethz.ch/view/eth:29756.

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Geršl, Jan. "Grafické intro 64kB s použitím OpenGL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235939.

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The field of this project is size restricted graphic intro. The paper deals with motivation creating such an intro and talks briefly about history. Main focus is put on general description of various principles common in demo development, techiques used achieving the practical assignment are provided with more detailed description.

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Sykala, Filip. "Grafické intro 64kB s použitím OpenGL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236468.

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Master's Thesis is about the techniques of creating a small executable program with size limited to 64kB. Describes one of the possible ways to use OpenGL for such purposes. With more detail describe the rigid body simulation, creating shaders, dynamic generating of texture and make music in intro scene applications. Presents using of WinApi to create windows, V2 synthetizer for sound and GLSL language for creating shaders. Everything is demonstratively created under Windows.

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Burkot, Martin. "Grafické intro 64kB s použitím OpenGL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-236984.

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This thesis deals with the creation of minimal graphics intro. Intro size is not extending 64kB. The base of the intro is procedurally generated terrain supplemented with procedural vegetation and texture representing clouds. It also has terrain texture and imported 3D models. As background music is music playing.

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Juránková, Markéta. "Grafické intro 64kB s použitím OpenGL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-237151.

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The aim of the master's thesis is to create a graphic intro with the limited size of 64kB. Brief history of a demoscene and the graphics library OpenGL is introduced in the following text. The main part of the work is a description of minimal graphics techniques used in a creative process and their further application in the final programme.

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Hrušovský, Marek. "Akcelerace genetického algoritmu s využitím OpenCL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-237246.

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Tato práce se zabývá problematikou urychlování genetických algoritmů a hned v úvodu nastiňuje možnosti využití genetických algoritmů v praxi. V první kapitole je detailně rozebrán princip fungování genetického algoritmu. Tato kapitola se dále zabývá možnostmi zákódování problému, který je použit pro běh genetického algoritmu. Konkrétně je vzpomenuto binární zakódování jedince, celočíselné zakódování jedince, neceločíselné zakódování jedince a permutační zakódování jedince. Pro každý typ zakódování jsou dále představeny genetické operátory mutace, křížení a selekce. Důraz je kladen na permutační genetické operátory OX a PMX. Další kapitola se zabývá možnostmi paralelizace genetického algoritmu. Další kapitola představuje nový standard jménem OpenCL, který umožňuje snadnou paralelizaci výpočtú s využitím různých typů procesorů v ten samý čas. OpenCL taktéž zjednodušuje programování pro grafické karty. Další kapitola navrhuje možnost, jak urychlit výpočet genetického algoritmu s využitím grafické karty a jazyka OpenCL. Pro urychlení byl zvolen permutační genetický algoritmus "problém N-dam", který je náročný na paměť grafické karty. Tato kapitola rozebírá technické specifikace grafické karty, které jsou nevyhnutelné k určení maximální velikosti šachovnice. V kapitole je analyzována správná práce s pamětí grafické karty, která je nevyhnutelná k dosažení urychlení zvoleného genetického algoritmu. Jsou zde taky nastíněny dva generátory náhodných čísel, které jsou součástí testů. Následující kapitola detailně popisuje fungování navržené paralelizace genetického algoritmu. Jsou zde porovnány dvě metody evaluace jedince a je popsán způsob testování a vyhodnocování výsledků. Předposlední kapitola porovnává časovou náročnost generátorů náhodných čísel. Bylo zjištěno, že generátor HybridTaus je o 20 rychlejší o proti generátoru XORshift na GPU. Na CPU byl naopak rychlejší generátor XORshift. Generátor XORshift je na GPU 20 krát rychlejší a generátor HybridTaus je dokonce až 80 krát rychlejší. Dále byly porovnány evaluační funkce. Bylo zjištěno, že GPU běh je 800 krát rychlejší oproti běhu na CPU. Paměťově náročná evaluační metoda byla schopná dosáhnout jenom dvojnásobné zrychlení. Kapitola dále porovnává funkce křížení. PMX dosáhlo zrychlení maximálně o 100 a i to v případech, které nejsou atraktivní pro řešení problému N-dam (N>20). V případe OX je možné dosáhnout zrychlení až o 1100. Také v tomto případě jsou atraktivní hodnoty pouze do 500. Testy, které vyhodnocují běh celého GA, ukázaly, že GPU verze je zhruba dvojnásobně rychlejší. Malé zrychlení bylo způsobeno operátorem selekce a funkcí křížení.

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Šnobl, Pavel. "Překlad OpenCL aplikací pro vestavěné systémy." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2016. http://www.nusl.cz/ntk/nusl-255361.

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This master's thesis deals with the support for compilation and execution of programs written using OpenCL framework on embedded systems. OpenCL is a system for programming heterogeneous systems comprising processors, graphic accelerators and other computing devices. But it also finds usage on systems composed of just one computing unit, where it allows to write parallel programs (task and data parallelism) and work with hierarchical system of memories. In this thesis, various available open source OpenCL implementations are compared and one selected is then integrated into LLVM compiler infrastructure. This compiler is generated as a part of toolchain provided by application specific instruction set architecture processor developement environment called Codasip Studio. Designed and implemented are also optimizations for architectures with SIMD instructions and VLIW architectures. The result is tested and demonstrated on a set of testing applications.

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Olexa, Jan. "Grafické intro 64kB s použitím OpenGL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2019. http://www.nusl.cz/ntk/nusl-399181.

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Badalamenti, Bryan M. "OpenCL Based Digital Image Projection Acceleration." University of Dayton / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1438277905.

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Milet, Tomáš. "Grafické intro 64kB s použitím OpenGL." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236545.

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This thesis deals with the creation of the intro with limited size. This work describes methods for reducing the size of the final application. The main part describes methods for generating graphic content and methods for its animation. It deals with creation of textures and geometry. Another part is aimed on the physical simulation of particle and elastic systems.

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Karlsson, Tim. "Implementing Cauchy Reed-Solomon Utilizing OpenCL." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4823.

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In this paper the performance of executing Cauchy Reed-Solomon (CRS) coding on the GPU is evaluated and compared with execution on the CPU. Three different prototypes are developed. One is sequential and developed in C++, the other two are developed utilizing C++ and OpenCL. The measurements are done by comparing the execution time of different data block sizes ranging from 16KB up to 256MB with two different encoding ratios, 9/12 and 10/16. The measurements are done on an Intel CPU with 4 cores with an integrated graphics card and an AMD graphics card. The OpenCL prototypes are executed with three different targets, the CPU, the integrated graphics card and the AMD graphics card. The sequential prototype is executed on the same CPU, but on a single core. The results from the measurements show that the GPU is faster than the CPU on larger data sizes. The highest measured throughput is achieved with the multithreaded CPU prototypes (OpenCL executed on the CPU) for sizes around 1MB.
I den här rapporten genomförs prestandatester för exekvering av Cauchy Reed-Solomon (CRS) coding på grafikkortet och jämförs med exekvering på en CPU. Tre olika prototyper har utvecklats. En är sekventiell och utvecklad i C++, de två andra är utvecklade i OpenCL och C++. Testerna genomförs genom tidtagning på olika stora datablock, från 16KB upp till 256MB med olika enkodnings ratios, 9/12 och 10/16. CPU:n som används i testerna är en Intel CPU med 4 kärnor, och grafikkorten som används är det integrerade grafikkortet på CPU:n samt ett grafikkort från AMD. OpenCL prototyperna exekveras med tre olika inställningar, CPU för multitrådat, det integrerade Intel grafikkortet och det dedikerade AMD grafikkortet. Den sekventiella prototypen exekveras på samma CPU, men med en kärna. Resultaten från experimenten visar att grafikkorten är snabbare än CPU:n för större datablock. Den prototyp som fick högst genomströmning av data var den multitrådade CPU prototypen för datablock i storleksordningen 1MB.

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Nordström, Björn, and Vincent Thuning. "Adwall : Visualization of data in OpenGL." Thesis, Karlstads universitet, Avdelningen för datavetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-13540.

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This thesis describes the problems and solutions of visualizing data in a real time environment.The implemented system consists of three parts, a view, controller and fetcher. These parts are loosely connected by the Model-View-Controller pattern.The performance aspect of the view will be adressed, as of the real time requirement of the visualization.The topics that the performance aspect leads to are; OpenGL optimizations and the feasiblity of using the interpreted programming language Python for real time rendering. The OpenGL optimization topic examines different rendering techniques; how they are implemented and how they perform.The role of the controller is to synchronize and organize the data over a number of views. This thesis will discuss how this was achieved with the publisher-subscribe pattern.The data source in the implementation of the project is the advertisement website Blocket.se. Blocket.se are also the customer of the system.

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Bennet, Fredrik, and Stefan Fenelius. "Implementation of SceneServer : a 3D software assisting developers of computer vision algorithms." Thesis, Linköping University, Department of Science and Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1779.

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The purpose behind this thesis is to develop a software (SceneServer) that can generate data such as images and vertex lists from computer models. These models are placed in a virtual environment and they can be controlled either from a graphical user interface (GUI) or from a MATLAB client. Data can be retrieved and processed in MATLAB. By creating a connection between MATLAB and a 3D environment, computer vision algorithms can be designed and tested swiftly, thus giving the developer a powerful platform. SceneServer allows the user to manipulate, in detail, the models and scenes to be rendered.

MATLAB communicates with the SceneServer application through a Java library, which is connected to an interface in SceneServer. The graphics are visualised using Open Scene Graph (OSG) that in turn uses OpenGL. OSG is an open source cross-platform scene graph library for visualisation of real-time graphics. OpenGL is a software interface for creating advanced computer graphics in 2D and 3D.

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Baáš, Filip. "Stanovení pozice objektu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-400661.

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Master’s thesis deals with object pose estimation using monocular camera. As an object is considered every rigid, shape fixed entity with strong edges, ideally textureless. Object position in this work is represented by transformation matrix, which describes object translation and rotation towards world coordinate system. First chapter is dedicated to explanation of theory of geometric transformations and intrinsic and extrinsic parameters of camera. This chapter also describes detection algorithm Chamfer Matching, which is used in this work. Second chapter describes all development tools used in this work. Third, fourth and fifth chapter are dedicated to practical realization of this works goal and achieved results. Last chapter describes created application, that realizes known object pose estimation in scene.

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Dissertations / Theses on the topic 'Openfl'

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