7,186 research outputs found
Stereo Vision and Scene Segmentation
No full textThis chapter focuses on how segmentation robustness can be improved by 3D scene geometry
provided by stereo vision systems, as they are simpler and relatively cheaper than most of
current range cameras. In fact, two inexpensive cameras arranged in a rig are often enough
to obtain good results. Another noteworthy characteristic motivating the choice of stereo
systems is that they both provide 3D geometry and color information of the framed scene
without requiring further hardware. Indeed, as it will be seen in following sections, 3D geometry
extraction from a framed scene by a stereo system, also known as stereo reconstruction,
may be eased and improved by scene segmentation since the correspondence research can be
restricted within the same segment in the left and right images
Ensemble to Improve Gesture Recognition
No full textAutomatic hand gesture recognition plays a fundamental role in current research with the aim of empowering a natural communication between users and virtual reality systems. Starting from an existing work, based on the extraction of two different descriptors from the depth maps followed by their classification with a stand-alone multi SVM classifier, in this paper we improve the gesture recognition system performances and reliability and we evaluate different classification approaches.
To this purpose, we first compare the performance of different descriptors and analyze their correlation for assessing their complementarity, and then we demonstrate the advantage gained by their fusion by the Wilcoxon Signed-Rank test.
In particular, the novelties of this paper are a new method for extracting features from the curvature image and the design of a very effective ensemble of classifiers to solve the problem
Combination of Depth and Texture Descriptors for Gesture Recognition
No full textAutomatic hand gesture recognition is a challenging problem that is attaining a growing interest due to its applications in natural interfaces for human-machine interaction, automatic sign-language recognition, computer gaming, robotics and healthcare. This chapter briefly reviews existing approaches for automatic hand gesture recognition and proposes a novel system exploiting together color and depth data. The proposed approach is based on a set of four descriptors extracted from the depth map and three texture descriptors extracted from the 2D image, while the classification is performed by an ensemble of support vector machines and decision trees. A main novelty for feature extraction is a method based on the histogram of gradients used for describing the curvature image obtained from the depth map.
Another novelty is the evaluation of different colorimetric spaces for improving the recognition performance of the texture descriptors: the best performance is obtained using the lightness band of the L*c*h* color space.
In the experimental Section the performances of different "stand-alone" descriptors are firstly compared and their correlation is analyzed for assessing their complementarity, and eventually the advantage gained by their fusion is demonstrated by the Wilcoxon Signed-Rank test
A new approach to institutional domain analysis: Multilevel research fronts structure
No full textThe intellectual structure and main research fronts of the Faculty of Natural Sciences and
Museum of the National University of La Plata, Argentina is studied, based on the cocitation analysis of subject categories, journals and authors of their scientific publications collected in the Science Citation Index, CD-ROM version, for the period 1991–2000. The objective of this study is to test the utility of those techniques to explore and to visualize the intellectual structure and research fronts of multidisciplinary institutional domains. Special emphasis is laid on the identification of multilevel structures, by means of arrangements of subject categories cocitation analysis and journal cocitation analysis
La mente dominio specifica
No full textIn the last half century, the idea has emerged that the mind can have some domain specificities, such as the multiplicity of intelligence or it can be characterized by analytical, practical, and creative intelligence. These distinctions concerned the explicit mind; however, it is possible to hypothesize that the implicit mind also plays its own role in orienting the domain specificity of the mind. The specificity of the possible domain configurations of the mind is reflected in the cognitive choices and orients the student from a motivational point of view. The research question of this work concerns the possibility of predicting a student's choice of university course with a scientific method by analyzing the implicit and explicit mind and their interactions. Can the domain specificity of the implicit mind guide the cognitive choices of the explicit mind? The concept of basic logic (Santoianni 2014) explains an implicit prototype of knowledge organization that precedes explicit learning and collaborates with it by giving primary indications on how to direct subsequent processing and thus contributing to cognitive management. The research was carried out using the theory of basic logics, according to which 6 basic logics (integration, sequence, individuation, comparison, induction and deduction, correlation) could regulate the development of both implicit and explicit thinking, with connection between the two areas. The quantitative analysis of the data confirms, through the result of multiple statistically significant differences in the use of basic logics by groups of students belonging to different degree courses, the hypothesis that some of them are more suited to the study of some subjects and consequently to the cognitive identities of the students who choose them.Nell'ultimo mezzo secolo si è profilata l'idea che la mente possa avere alcune specificità di dominio, come la molteplicità dell'intelligenza oppure possa essere caratterizzata da intelligenza analitica, pratica e creativa. Queste distinzioni hanno riguardato la mente esplicita; tuttavia, è possibile ipotizzare che anche la mente implicita giochi un proprio ruolo nell'orientare la specificità di dominio della mente. La specificità delle possibili configurazioni di dominio della mente si riflette sulle scelte cognitive e orienta lo studente da un punto di vista motivazionale. La domanda di ricerca di questo lavoro riguarda la possibilità di prevedere con un metodo scientifico la scelta del corso universitario da parte di uno studente analizzando la mente esplicita e implicita e le loro interazioni. La specificità di dominio della mente implicita può orientare le scelte cognitive della mente esplicita? Il concetto di logica di base (Santoianni 2014) spiega un prototipo implicito di organizzazione della conoscenza che precede l'apprendimento esplicito e collabora con esso dando indicazioni primarie su come indirizzare la successiva elaborazione e concorrendo in questo modo alla gestione del cognitivo. La ricerca è stata svolta utilizzando la teoria delle logiche di base, secondo la quale 6 logiche di base (integrazione, sequenzialità, individuazione, comparazione, induzione e deduzione, correlazione) potrebbero regolare lo sviluppo del pensiero sia implicito, sia esplicito, con funzioni di connessione tra i due ambiti. L’analisi quantitativa dei dati conferma, attraverso il risultato di molteplici differenze statisticamente significative nell’utilizzo delle logiche di base da parte di gruppi di studenti appartenenti a diversi corsi di laurea, l’ipotesi che alcune di esse siano più consone allo studio di alcune materie e di conseguenza alle identità cognitive degli studenti che le scelgono
Questioni di tipologia diacronica nel dominio della diatesi
No full textObiettivo di questo articolo è illustrare il metodo della tipologia diacronica e i suoi limiti. L’analisi si concentrerà su due costruzioni che ricadono nel dominio funzionale della diatesi: gli antipassivi
e i passivi. Si illustreranno, innanzitutto, le più frequenti sorgenti diacroniche degli antipassivi individuate in un campione di 120 lingue, e si mostrerà che in alcuni casi la sorgente diacronica è in grado di spiegare alcune caratteristiche sincroniche di una specifica costruzione antipassiva. Sarà poi discusso il caso di alcune costruzioni passive che avrebbero origine da una nominalizzazione d’azione: questa ipotesi risulta, a un esame più attento, frutto di un miraggio, perché è più realistico ipotizzare che sia il passivo che la nominalizzazione d’azione derivino da un’ulteriore sorgente diacronica
Modos de perder el dominio
No full textSe pretende ver los modos de perder el dominio.
Diferenciar cada uno de los modos entre sí.
Analizar las características de cada uno de ellos.https://polimedia.upv.es/visor/?id=7e3c1fd7-313c-0b4f-90de-f1fb4a63a55fRamón Fernández, F. (2009). Modos de perder el dominio. https://riunet.upv.es/handle/10251/595
Sous-développement et émigration en Italie méridionale : F. P. Cerase, Sotto il dominio dei borghesi
No full textDalmasso Etienne. Sous-développement et émigration en Italie méridionale : F. P. Cerase, Sotto il dominio dei borghesi. In: Annales de Géographie, t. 87, n°480, 1978. pp. 226-227
Modelo de dominio
No full textModelo de dominio
2 Horas
Ingeniería de Software
2º curso del Grado en Ingeniería Informática
Universidad de Salamanc
Modelo de Dominio
No full textModelo de dominio
Ingeniería de Software I
Grado en Ingeniería Informática
Universidad de Salamanca
Curso 2018-201
- …
