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Semantic content analysis for effective video segmentation, summarisation and retrieval.Ren, Jinchang January 2009 (has links)
This thesis focuses on four main research themes namely shot boundary detection, fast frame alignment, activity-driven video summarisation, and highlights based video annotation and retrieval. A number of novel algorithms have been proposed to address these issues, which can be highlighted as follows.
Firstly, accurate and robust shot boundary detection is achieved through modelling of cuts into sub-categories and appearance based modelling of several gradual transitions, along with some novel features extracted from compressed video. Secondly, fast and robust frame alignment is achieved via the proposed subspace phase correlation (SPC) and an improved sub-pixel strategy. The SPC is proved to be insensitive to zero-mean-noise, and its gradient-based extension is even robust to non-zero-mean noise and can be used to deal with non-overlapped regions for robust image registration. Thirdly, hierarchical modelling of rush videos using formal language techniques is proposed, which can guide the modelling and removal of several kinds of junk frames as well as adaptive clustering of retakes. With an extracted activity level measurement, shot and sub-shot are detected for content-adaptive video summarisation. Fourthly, highlights based video annotation and retrieval is achieved, in which statistical modelling of skin pixel colours, knowledge-based shot detection, and improved determination of camera motion patterns are employed.
Within these proposed techniques, one important principle is to integrate various kinds of feature evidence and to incorporate prior knowledge in modelling the given problems. High-level hierarchical representation is extracted from the original linear structure for effective management and content-based retrieval of video data. As most of the work is implemented in the compressed domain, one additional benefit is the achieved high efficiency, which will be useful for many online applications. / EU IST FP6 Project
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AN EVALUATION OF TEST IMAGES FOR MULTIPLE-CHOICE COMPREHENSION ASSESSMENT IN APHASIAHeuer, Sabine 20 July 2004 (has links)
No description available.
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Semantic content analysis for effective video segmentation, summarisation and retrievalRen, Jinchang January 2009 (has links)
This thesis focuses on four main research themes namely shot boundary detection, fast frame alignment, activity-driven video summarisation, and highlights based video annotation and retrieval. A number of novel algorithms have been proposed to address these issues, which can be highlighted as follows. Firstly, accurate and robust shot boundary detection is achieved through modelling of cuts into sub-categories and appearance based modelling of several gradual transitions, along with some novel features extracted from compressed video. Secondly, fast and robust frame alignment is achieved via the proposed subspace phase correlation (SPC) and an improved sub-pixel strategy. The SPC is proved to be insensitive to zero-mean-noise, and its gradient-based extension is even robust to non-zero-mean noise and can be used to deal with non-overlapped regions for robust image registration. Thirdly, hierarchical modelling of rush videos using formal language techniques is proposed, which can guide the modelling and removal of several kinds of junk frames as well as adaptive clustering of retakes. With an extracted activity level measurement, shot and sub-shot are detected for content-adaptive video summarisation. Fourthly, highlights based video annotation and retrieval is achieved, in which statistical modelling of skin pixel colours, knowledge-based shot detection, and improved determination of camera motion patterns are employed. Within these proposed techniques, one important principle is to integrate various kinds of feature evidence and to incorporate prior knowledge in modelling the given problems. High-level hierarchical representation is extracted from the original linear structure for effective management and content-based retrieval of video data. As most of the work is implemented in the compressed domain, one additional benefit is the achieved high efficiency, which will be useful for many online applications.
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USO DE TEORIAS NO CAMPO DE SISTEMAS DE INFORMAÇÃO: MAPEAMENTO USANDO TÉCNICAS DE MINERAÇÃO DE TEXTOSPinheiro, José Claudio dos Santos 17 September 2009 (has links)
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Previous issue date: 2009-09-17 / This work aim to map the use of information system s theories, based on analytic resources that came from information retrieval techniques and data mining and text mining methodologies. The theories addressed by this research were Transactions Costs Economics (TCE), Resource-based view (RBV) and Institutional Theory (IT), which were chosen given their usefulness, while alternatives of approach in processes of allocation of investments and implementation of information systems. The empirical data are based on the content of textual data in abstract and review sections, of articles from ISR, MISQ and JIMS along the period from 2000 to 2008. The results stemming from the text mining technique combined with data mining were compared with the advanced search tool EBSCO and demonstrated greater efficiency in the identification of content. Articles based on three theories accounted for 10% of all articles of the three journals and the most useful publication was the 2001 and 2007.(AU) / Esta dissertação visa apresentar o mapeamento do uso das teorias de sistemas de informações, usando técnicas de recuperação de informação e metodologias de mineração de dados e textos. As teorias abordadas foram Economia de Custos de Transações (Transactions Costs Economics TCE), Visão Baseada em Recursos da Firma (Resource-Based View-RBV) e Teoria Institucional (Institutional Theory-IT), sendo escolhidas por serem teorias de grande relevância para estudos de alocação de investimentos e implementação em sistemas de informação, tendo como base de dados o conteúdo textual (em inglês) do resumo e da revisão
teórica dos artigos dos periódicos Information System Research (ISR), Management Information Systems Quarterly (MISQ) e Journal of Management Information Systems
(JMIS) no período de 2000 a 2008. Os resultados advindos da técnica de mineração textual aliada à mineração de dados foram comparadas com a ferramenta de busca avançada EBSCO e demonstraram uma eficiência maior na identificação de conteúdo. Os artigos fundamentados nas três teorias representaram 10% do total de artigos dos três períodicos e o período mais profícuo de publicação foi o de 2001 e 2007.(AU)
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The morpho-semantics of compound words in SepediMaboa, Rachel Mmapitso January 2022 (has links)
Thesis (M.A. (Translation Studies and Linguistics)) -- University of Limpopo, 2022 / The prime goal of this study is to explore, form and analyse the semantic content of
compound words in Sepedi. The study used the qualitative method. Data were
collected using participant observations from various written sources and it was
analysed through Content Analysis. The Theory of Construction Morphology was
tested on endocentric, exocentric, and copulative compound words to locate the
headedness of Sepedi compound words. The study revealed that the head of
compound words can be located on the nominal prefix, left-hand side, right-hand side,
on both nominal prefixes and it can be determined outside of the compound word for
metaphoric exocentric nominal compounds. Furthermore, because of the role noun
class prefixes play on determining the head of compound words, the study found that
Sepedi compound words are nominals. The formation of Sepedi compound words
involves the combination of different word aspects such as objects concords,
deverbatives, verbal roots, stems, suffixal endings, and lexical categories such as
nouns, Adjectives, and verbs. The resultant compound word of these combinations
always results in a compound noun. It was recommended that future researchers
should investigate the semantic content of exocentric compound words in African
languages, especially the Sepedi language. The study further highlighted that there is
still a need for a study that looks at the influences of nominal prefixes on the
headedness of compound words in Sepedi. Furthermore, the study recommended that
to alleviate the gap of shortage of literature in Sepedi, future studies should focus on
word formation processes in Sepedi. / Feenix Crowdfunding and C Track Fleet Management
Solutions Pty Ltd
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