• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 28
  • 24
  • 18
  • 7
  • 4
  • 3
  • 2
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 97
  • 13
  • 10
  • 9
  • 7
  • 7
  • 7
  • 7
  • 7
  • 7
  • 6
  • 6
  • 5
  • 5
  • 5
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Panorama och VR teknik

Persson, Malin January 2010 (has links)
Till examensarbetet hör även en VR-boll
2

Panorama och VR teknik

Persson, Malin January 2010 (has links)
Till examensarbetet hör även en VR-boll
3

Algorithms, Protocols & Systems for Remote Observation Using Networked Robotic Cameras

Qin, Ni 16 January 2010 (has links)
Emerging advances in robotic cameras, long-range wireless networking, and distributed sensors make feasible a new class of hybrid teleoperated/autonomous robotic remote "observatories" that can allow groups of peoples, via the Internet, to observe, record, and index detailed activity occurred in remote site. Equipped with robotic pan-tilt actuation mechanisms and a high-zoom lens, the camera can cover a large region with very high spatial resolution and allows for observation at a distance. High resolution motion panorama is the most nature data representation. We develop algorithms and protocols for high resolution motion panorama. We discover and prove the projection invariance and achieve real time image alignment. We propose a minimum variance based incremental frame alignment algorithm to minimize the accumulation of alignment error in incremental image alignment and ensure the quality of the panorama video over the long run. We propose a Frame Graph based panorama documentation algorithm to manage the large scale data involved in the online panorama video documentation. We propose a on-demand high resolution panorama video-streaming system that allows on-demand sharing of a high-resolution motion panorama and efficiently deals with multiple concurrent spatial-temporal user requests. In conclusion, our research work on high resolution motion panorama have significantly improve the efficiency and accuracy of image alignment, panorama video quality, data organization, and data storage and retrieving in remote observation using networked robotic cameras.
4

How do AR visualizations impact users' collective interactions in mixed reality experiences?

Andersson, Moa January 2016 (has links)
This study examines how Augmented Reality (AR) visualizations can impact the collective interaction of users. This research will focus on a multiphase experience with a buildup of different levels of Virtual Reality through the use of panoramas and 3D models. The experience was created using a participatory method with multiple tests and iterations to better create an evaluable product. The result if this experiment shows that the impact AR has on users is extensive. A properly framed character can even change a pair of two users into a group of three.
5

Digital presentation av Sunnerbogymnasiet : -      En studie över hur VR kan användas för att locka nya elever

Lindh, Lina, Ahmadi, Atena January 2009 (has links)
<p>Syftet med detta arbete är att skapa en applikation som ska hjälpa och gynna Sunnerbogymnasiet när det gäller att locka till sig elever som går på högstadiet. För att göra detta har gruppen använt sig av bland annat VR (Virtual Reality) och Panorama som metoder till att göra applikationen attraktiv för målgruppen. För att få fram vad som kan locka elever till att använda applikationen utfördes enkätundersökningar på målgruppen som är elever i årskurs 8-9. Genom undersökningarna fick gruppen fram vad för information applikationen bör innehålla för att locka till sig elever. Med hjälp utav intervjuerna som utfördes på elever som går på Sunnerbogymnasiet, framkom det vilka platser som eleverna ansåg vara populärast på skolan. På dessa platser togs det bilder som sedan gjordes om till panorama filmer. Det finns en introduktionsdel där gruppen har visualiserat Sunnerbogymnasiets entré. Tanken bakom det är att elever ska känna igen sig när de besöker skolan. Resultatet blev en kompletterande applikation med en introduktionsfilm i 3D som föreställer skolans entré. För att visa upp populära platser på skolan finns det panorama filmer på dessa platser.</p>
6

Digital Stack Photography and Its Applications

Hu, Jun January 2014 (has links)
<p>This work centers on digital stack photography and its applications.</p><p>A stack of images refer, in a broader sense, to an ensemble of</p><p>associated images taken with variation in one or more than one various </p><p>values in one or more parameters in system configuration or setting.</p><p>An image stack captures and contains potentially more information than</p><p>any of the constituent images. Digital stack photography (DST)</p><p>techniques explore the rich information to render a synthesized image</p><p>that oversteps the limitation in a digital camera's capabilities.</p><p>This work considers in particular two basic DST problems, which had</p><p>been challenging, and their applications. One is high-dynamic-range</p><p>(HDR) imaging of non-stationary dynamic scenes, in which the stacked</p><p>images vary in exposure conditions. The other</p><p>is large scale panorama composition from multiple images. In this</p><p>case, the image components are related to each other by the spatial</p><p>relation among the subdomains of the same scene they covered and</p><p>captured jointly. We consider the non-conventional, practical and</p><p>challenge situations where the spatial overlap among the sub-images is</p><p>sparse (S), irregular in geometry and imprecise from the designed</p><p>geometry (I), and the captured data over the overlap zones are noisy</p><p>(N) or lack of features. We refer to these conditions simply as the</p><p>S.I.N. conditions.</p><p>There are common challenging issues with both problems. For example,</p><p>both faced the dominant problem with image alignment for</p><p>seamless and artifact-free image composition. Our solutions to the</p><p>common problems are manifested differently in each of the particular</p><p>problems, as a result of adaption to the specific properties in each</p><p>type of image ensembles. For the exposure stack, existing</p><p>alignment approaches struggled to overcome three main challenges:</p><p>inconsistency in brightness, large displacement in dynamic scene and</p><p>pixel saturation. We exploit solutions in the following three</p><p>aspects. In the first, we introduce a model that addresses and admits</p><p>changes in both geometric configurations and optical conditions, while</p><p>following the traditional optical flow description. Previous models</p><p>treated these two types of changes one or the other, namely, with</p><p>mutual exclusions. Next, we extend the pixel-based optical flow model</p><p>to a patch-based model. There are two-fold advantages. A patch has</p><p>texture and local content that individual pixels fail to present. It</p><p>also renders opportunities for faster processing, such as via</p><p>two-scale or multiple-scale processing. The extended model is then</p><p>solved efficiently with an EM-like algorithm, which is reliable in the</p><p>presence of large displacement. Thirdly, we present a generative</p><p>model for reducing or eliminating typical artifacts as a side effect</p><p>of an inadequate alignment for clipped pixels. A patch-based texture</p><p>synthesis is combined with the patch-based alignment to achieve an</p><p>artifact free result.</p><p>For large-scale panorama composition under the S.I.N. conditions, we</p><p>have developed an effective solution scheme that significantly reduces</p><p>both processing time and artifacts. Previously existing approaches can</p><p>be roughly categorized as either geometry-based composition or feature</p><p>based composition. In the former approach, one relies on precise</p><p>knowledge of the system geometry, by design and/or calibration. It</p><p>works well with a far-away scene, in which case there is only limited</p><p>variation in projective geometry among the sub-images. However, the</p><p>system geometry is not invariant to physical conditions such as</p><p>thermal variation, stress variation and etc.. The composition with</p><p>this approach is typically done in the spatial space. The other</p><p>approach is more robust to geometric and optical conditions. It works</p><p>surprisingly well with feature-rich and stationary scenes, not well</p><p>with the absence of recognizable features. The composition based on</p><p>feature matching is typically done in the spatial gradient domain. In</p><p>short, both approaches are challenged by the S.I.N. conditions. With</p><p>certain snapshot data sets obtained and contributed by Brady et al, </p><p>these methods either fail in composition or render images with</p><p>visually disturbing artifacts. To overcome the S.I.N. conditions, we</p><p>have reconciled these two approaches and made successful and</p><p>complementary use of both priori and approximate information about</p><p>geometric system configuration and the feature information from the</p><p>image data. We also designed and developed a software architecture</p><p>with careful extraction of primitive function modules that can be</p><p>efficiently implemented and executed in parallel. In addition to a</p><p>much faster processing speed, the resulting images are clear and</p><p>sharper at the overlapping zones, without typical ghosting artifacts.</p> / Dissertation
7

Educação e liberdade : o conceito de liberdade na pedagogia brasileira da década de oitenta

Gustavo Ferreira da Silva, André January 2007 (has links)
Made available in DSpace on 2014-06-12T17:19:49Z (GMT). No. of bitstreams: 2 arquivo5439_1.pdf: 3600981 bytes, checksum: 08cbef2b45291018c90c2116a4468503 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2007 / O objeto maior da investigação são os conceitos de liberdade subjacentes aos discursos pedagógicos no Brasil durante a década de oitenta. Defendemos o conceito de liberdade como categoria para uma nova síntese do pensamento pedagógico brasileiro, apontando identidades e distinções entre os vários discursos pedagógicos. Apresentamos também o contexto filosófico das principais idéias relacionadas a esses discursos. A investigação se justifica pelo fato de ampliar o debate pedagógico para além da discussão acerca de transposição didática e tecnologias de ensino. As reflexões de alguns educadores foram destacas com o intuito de representar o panorama da época. Nesse sentido, analisamos a presença do conceito de liberdade no discurso comportamentalista demonstrando sua relação com a criatividade; a presença do conceito de liberdade no discurso estruturalista e a aplicação da teoria da reprodução na análise da educação; tratamos do conceito de liberdade para a perspectiva gramsciana, composta pelos representantes da crítica social dos conteúdos, pelos ligados às metodologias alternativas de pesquisa e por demais gramscianos, que em comum trabalham a noção de hegemonia e a idéia do educador voltado para uma pedagogia da revolução; abordaremos a perspectiva da escola de Frankfurt que traz a noção de qualidade de vida humana coletiva e da educação enquanto ciência emancipatória; a perspectiva fenomenológica da educação no Brasil para a qual a liberdade está relacionada com a transcendência; por fim, tratamos do conceito de liberdade nos discursos freireanos, observando noções como conscientização e libertação. Após estas análises, relacionamos os conceitos de liberdade trabalhados com as propostas educacionais manifestos pelas correntes pedagógicas na década de oitenta, abordando as determinações de tais conceitos sobre o que manifestam como concepção, finalidade e conteúdos da educação. Assim, propomos o panorama das teorias pedagógicas brasileiras tendo como fio analítico o conceito de liberdade. Destarte, identificamos: o comportamentalismo enquanto uma pedagogia reformuladora que concebe seu processo pedagógico como desenvolvimento de habilidades, visando formar o individuo útil à sociedade e valorizando a aquisição de competências; os estruturalistas enquanto uma pedagogia libertária caracterizada por uma concepção autogestionária de educação e focada na abolição dos mecanismos de reprodução da dominação, onde os conteúdos e tarefas sejam legitimados pelo interesse coletivo; os gramscianos como a pedagogia contra-hegemônica para os quais a educação é um instrumento de revolução e deve contribuir para o acirramento das contradições, valorizando os conteúdos crítico-dialéticos; os frankfurtianos e a pedagogia emancipatória que concebem o processo pedagógico enquanto construção da qualidade de vida, superando a alienação-reificação; os fenomenólógos e a pedagogia da transcendência que pensam a educação como processo e projeto existencial e coletivo, que tem como finalidade a construção do existir autêntico num mundo aberto, valorizando a diversidade; e, os freireanos enquanto a pedagogia da libertação que concebem a educação enquanto processo de conscientização e libertação visando a humanização e valorizando como conteúdos e tarefas aqueles legitimados pela participação. O trabalho, além de outras considerações, aponta que o uso da categoria liberdade contribui para precisar o lugar teórico de correntes de mesmo matiz ideológico e para distinguir as concepções, finalidades e conteúdos propostos por correntes pedagógicas subsidiadas por matrizes filosóficas correlatas
8

Y-a-t-il une philosophie chilienne ? : Introduction à la pensée philosophique de Jorge Eduardo Rivera / ¿Existe una filosofía chilena? : Introducción al pensamiento filosófico de Jorge Eduardo Rivera

Brickle, Patricio 12 May 2015 (has links)
Cette recherche propose, d'abord, de montrer que l'imaginaire construit par les Chiliens, selon lequel le Chili est "un pays de poètes", ignore les recherches menées par les universités chiliennes, par les principaux espaces de réflexion, ainsi que par la pensée et la philosophie en général.Deuxièmement, notre thèse analyse l'état de la philosophie au Chili, offrant un aperçu de la philosophie chilienne des soixante-dix dernières années à travers trois générations: celle qui a été formée au Chili par des professeurs étrangers recrutés par des universités chiliennes; puis une génération qui s'en va en Europe, y rencontre des figures intellectuelles de premier plan et rentre au Chili avec un patrimoine culturel important; enfin, la troisième génération est celle formée par ces derniers, mais qui vont également poursuivre leurs études supérieures à l'étranger. C'est à la deuxième génération qu'appartient le philosophe Jorge Eduardo Rivera.Or si nous affirmons que Jorge Eduardo Rivera est un philosophe, il faut, en troisième lieu, faire une pause et se demander: Qu'est-ce que la philosophie?, car la réponse à cette question nous permet de tracer une ligne de compréhension, qui n'est pas nécessairement appelée à être la seule possible. Nous abordons la question de la philosophie d'abord comme processus; ensuite, comme structure, et nous abordons également la question de l'Autorité. La philosophie en tant que processus est une explicitation herméneutique, la philosophie en tant que structure est création des concepts, de «systèmes»; et l'Autorité est le pouvoir avec lequel le penseur écrit ce qu'il écrit et rend ses écritures philosophiques.Ainsi, quatrièmement, nous nous approchons de la figure intellectuelle de Rivera. Nous exposons sa biographie et son histoire intellectuelle, les différents espaces dans les quelles sa pensée s'est formée, depuis son noviciat et son scolasticat chez les Pères Français, jusqu'à ses études en Allemagne et ses rencontres avec Heidegger, Gadamer, Fink, Von Herrmann et Xavier Zubiri. Le situs ne peut être ignoré dans l'œuvre d'un penseur.Cinquièmement, nous étudions quelques-unes des œuvres écrites par Jorge Eduardo Rivera: Étonnements et nostalgie. Essais philosophiques, Heidegger et Zubiri, Héraclite. Le splendide. Pour les deux premiers, nous nous sommes aventurés à suivre l'excursus philosophique de Rivera. La différence entre l'être et l'étant, l'ontique et l'ontologique peut éclairer la philosophie politique et les science politiques. C'est ce que nous appelons l'ontique et l'ontologique dans la politique.Puis, sixièmement, nous déterminons certaines catégories philosophiques, qui ne sont d'ailleurs, pas exclusives à Rivera, mais néanmoins présents dans plusieurs de ses écrits. Il s'agit notamment de: in actu excercito et in actu signato, la vie comme risque, la passion de la philosophie. Enfin, septièmement, nous visualisons la façon dont Rivera fait face à l'horizon philosophique grec: la question de l'être.En résumé, la thèse se veut une introduction à la pensée philosophique de Rivera, pour qui la philosophie a pour objet thématique l'être - ce qui est l'une des façons dont on peut comprendre la philosophie. Rivera emploie l'explicitation herméneutique comme méthode pour pénétrer la philosophie par la lecture et l'étude des sources philosophiques, tells que Héraclite, Parménide, Descartes, Hegel, Kant, Heidegger. La philosophie n'est ni une doctrine, ni des données concrètes. C'est davantage communication, explication. On y pénètre, pense Rivera, à travers le contact direct avec une œuvre philosophique d'envergure, comme, par exemple, la Phénoménologie de l'Esprit de Hegel ou la Critique de la raison pure de Kant. / ....
9

Um panorama de pesquisas sobre o ensino e a aprendizagem do cálculo diferencial e integral: 2003 a 2013

Marini, Wagner 27 February 2015 (has links)
Made available in DSpace on 2016-04-27T16:57:35Z (GMT). No. of bitstreams: 1 Wagner Marini.pdf: 979138 bytes, checksum: f3882bd2078421c09e44be2c9f6d6645 (MD5) Previous issue date: 2015-02-27 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The objective of this dissertation is to carry out a study focused on the research of Teaching and Learning of Calculus in Exact initial courses, produced in Brazil from 2003 to 2013. This study involves survey, categorization, and synthesis of the results and it was organized through a Panorama that includes dissertations, theses and articles focused on this theme. Methodological procedures that lead to the analysis of the collected material are those appropriate to qualitative research theorist related to state of the art. The analysis of the work constituents of Panorama aimed to highlight the relationship between the theories of sustaining, methodologies adopted and philosophical conceptions with the approach and development of work itself, having as reference, especially what is indicated by the English (2010). Furthermore, the analysis guided by the quest to answer the four questions drawn up for this purpose, has allowed the observation that there is a diversity of theories used as support of the work and a profusion of outcomes that allow the desirable bridge between the theory and the practice of Teaching and Learning the Differential and Integral Calculus. Results are highlighted based on the need of the area to establish consensus / O objetivo desta dissertação é o de realizar um estudo focado nas pesquisas, sobre o Ensino e de Aprendizagem do Cálculo em cursos iniciais de Exatas, produzidas no Brasil no período de 2003 e 2013. Esse estudo envolve levantamento, categorização e síntese dos resultados e foi organizado por meio de um Panorama que inclui dissertações teses e artigos com foco nesse tema. Os procedimentos metodológicos que conduzem a análise do material coletado são aqueles adequados às pesquisas qualitativas teóricas assemelhadas ao estado da arte. A análise dos trabalhos constituintes do Panorama visou destacar a relação das teorias de sustentação, das metodologias adotadas e das concepções filosóficas, com a abordagem e desenvolvimento dos trabalhos propriamente dito, tendo como referência, especialmente o que é indicado por English (2010). Além disso, a análise, norteada pela busca de respostas a quatro perguntas elaboradas para esse fim, permitiu a constatação de que há uma diversidade de teorias utilizadas como sustentação desses trabalhos e uma profusão de resultados que fazem a ponte desejável entre a teoria e a prática do Ensino e Aprendizagem do Cálculo Diferencial e Integral. Resultados são destacados atendendo a necessidade da área no estabelecimento de consensos
10

Cinema imersivo: narratividade cinematográfica na perspectiva da realidade virtual / Imersive cinema: film narrativity in the perspective of virtual reality

Souza, Guilherme Mendonça de 13 June 2017 (has links)
Submitted by Liliane Ferreira (ljuvencia30@gmail.com) on 2018-03-28T12:34:46Z No. of bitstreams: 2 Tese - Guilherme Mendonça de Souza - 2017.pdf: 55555017 bytes, checksum: 165fd7a1b83a773a5f8f7cb22691f26c (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-03-29T11:33:55Z (GMT) No. of bitstreams: 2 Tese - Guilherme Mendonça de Souza - 2017.pdf: 55555017 bytes, checksum: 165fd7a1b83a773a5f8f7cb22691f26c (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2018-03-29T11:33:55Z (GMT). No. of bitstreams: 2 Tese - Guilherme Mendonça de Souza - 2017.pdf: 55555017 bytes, checksum: 165fd7a1b83a773a5f8f7cb22691f26c (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-06-13 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / This exploratory research is based on the contemporary context of the relations between virtual reality and cinema. The thesis seeks to demonstrate how the technological advent influences the forms of communication and artistic manifestations, as well as brings out the emergence of emerging narratives. Immersive cinema (imercine), backed by the traditional cinematic language, suggests adaptations and significant changes in modes of production, exhibition and reception. The artistic project proposes the production of an immersive film (imerfilm) whose plot is inserted in the virtual reality environment. / Essa pesquisa exploratória é embasada no contexto contemporâneo das relações entre realidade virtual e cinema. A tese procura demonstrar como o advento tecnológico influencia nas formas de comunicação e manifestações artísticas, bem como traz à tona o surgimento de narrativas emergentes. O cinema imersivo (imercine), respaldado na linguagem cinematográfica tradicional, sugere adaptações e alterações significativas nos modos de produção, exibição e recepção. O projeto artístico propõe a produção de um filme imersivo (imerfilme) cuja trama se insere no ambiente da realidade virtual.

Page generated in 0.0746 seconds