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| Author | Albert Clapes | ||||
| Title | Learning to recognize human actions: from hand-crafted to deep-learning based visual representations | Type | Book Whole | ||
| Year | 2019 | Publication | PhD Thesis, Universitat de Barcelona-CVC | Abbreviated Journal | |
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| Abstract | Action recognition is a very challenging and important problem in computer vision. Researchers working on this field aspire to provide computers with the abil ity to visually perceive human actions – that is, to observe, interpret, and under stand human-related events that occur in the physical environment merely from visual data. The applications of this technology are numerous: human-machine interaction, e-health, monitoring/surveillance, and content-based video retrieval, among others. Hand-crafted methods dominated the field until the apparition of the first successful deep learning-based action recognition works. Although ear lier deep-based methods underperformed with respect to hand-crafted approaches, these slowly but steadily improved to become state-of-the-art, eventually achieving better results than hand-crafted ones. Still, hand-crafted approaches can be advan tageous in certain scenarios, specially when not enough data is available to train very large deep models or simply to be combined with deep-based methods to fur ther boost the performance. Hence, showing how hand-crafted features can provide extra knowledge the deep networks are notable to easily learn about human actions.
This Thesis concurs in time with this change of paradigm and, hence, reflects it into two distinguished parts. In the first part, we focus on improving current suc cessful hand-crafted approaches for action recognition and we do so from three dif ferent perspectives. Using the dense trajectories framework as a backbone: first, we explore the use of multi-modal and multi-view input data to enrich the trajectory de scriptors. Second, we focus on the classification part of action recognition pipelines and propose an ensemble learning approach, where each classifier leams from a different set of local spatiotemporal features to then combine their outputs following an strategy based on the Dempster-Shaffer Theory. And third, we propose a novel hand-crafted feature extraction method that constructs a rnid-level feature descrip tion to better modellong-term spatiotemporal dynarnics within action videos. Moving to the second part of the Thesis, we start with a comprehensive study of the current deep-learning based action recognition methods. We review both fun damental and cutting edge methodologies reported during the last few years and introduce a taxonomy of deep-leaming methods dedicated to action recognition. In particular, we analyze and discuss how these handle the temporal dimension of data. Last but not least, we propose a residual recurrent network for action recogni tion that naturally integrates all our previous findings in a powerful and prornising framework. |
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| Address | January 2019 | ||||
| Corporate Author | Thesis | Ph.D. thesis | |||
| Publisher | Ediciones Graficas Rey | Place of Publication | Editor | Sergio Escalera | |
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ISBN | 978-84-948531-2-8 | Medium | ||
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| Notes | HUPBA | Approved | no | ||
| Call Number | Admin @ si @ Cla2019 | Serial | 3219 | ||
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| Author | Enric Marti; Carme Julia; Debora Gil | ||||
| Title | A PBL Experience in the Teaching of Computer Graphics | Type | Journal Article | ||
| Year | 2006 | Publication | Computer Graphics Forum | Abbreviated Journal | CGF |
| Volume | 25 | Issue | 1 | Pages | 95-103 |
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| Abstract | Project-Based Learning (PBL) is an educational strategy to improve student’s learning capability that, in recent years, has had a progressive acceptance in undergraduate studies. This methodology is based on solving a problem or project in a student working group. In this way, PBL focuses on learning the necessary tools to correctly find a solution to given problems. Since the learning initiative is transferred to the student, the PBL method promotes students own abilities. This allows a better assessment of the true workload that carries out the student in the subject. It follows that the methodology conforms to the guidelines of the Bologna document, which quantifies the student workload in a subject by means of the European credit transfer system (ECTS). PBL is currently applied in undergraduate studies needing strong practical training such as medicine, nursing or law sciences. Although this is also the case in engineering studies, amazingly, few experiences have been reported. In this paper we propose to use PBL in the educational organization of the Computer Graphics subjects in the Computer Science degree. Our PBL project focuses in the development of a C++ graphical environment based on the OpenGL libraries for visualization and handling of different graphical objects. The starting point is a basic skeleton that already includes lighting functions, perspective projection with mouse interaction to change the point of view and three predefined objects. Students have to complete this skeleton by adding their own functions to solve the project. A total number of 10 projects have been proposed and successfully solved. The exercises range from human face rendering to articulated objects, such as robot arms or puppets. In the present paper we extensively report the statement and educational objectives for two of the projects: solar system visualization and a chess game. We report our earlier educational experience based on the standard classroom theoretical, problem and practice sessions and the reasons that motivated searching for other learning methods. We have mainly chosen PBL because it improves the student learning initiative. We have applied the PBL educational model since the beginning of the second semester. The student’s feedback increases in his interest for the subject. We present a comparative study of the teachers’ and students’ workload between PBL and the classic teaching approach, which suggests that the workload increase in PBL is not as high as it seems. | ||||
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| Publisher | Computer Graphics Forum | Place of Publication | Computer Vision CenterComputer Science Department Escola Tcnica Superior d’Enginyeria (UAB), Edifi | Editor | |
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| Notes | IAM;ADAS; | Approved | no | ||
| Call Number | IAM @ iam @ MJG2006a | Serial | 1607 | ||
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| Author | Enric Marti; Petia Radeva; Ricardo Toledo; Jordi Vitria | ||||
| Title | Experiencia de aplicación de la metodología de aprendizaje por proyectos en asignaturas de Ingeniería Informática para una mejor adaptación a los créditos ECTS i al Espacio Europeo de Educación Superior | Type | Miscellaneous | ||
| Year | 2005 | Publication | Agencia de Gestio d´Ajuts Universitaris I de Recerca (AGAUR) | Abbreviated Journal | |
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| Area | Agencia de Gestio d´Ajuts Universitaris I de Recerca (AGAUR) | Expedition | Conference | ||
| Notes | IAM;RV;OR;MILAB;ADAS;MV | Approved | no | ||
| Call Number | IAM @ iam @ MRT2005 | Serial | 1608 | ||
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| Author | Enric Marti; Jordi Regincos; Juan Jose Villanueva; Jaime Lopez-Krahe | ||||
| Title | Line drawing interpretation as polyhedral objects to man-machine interaction in CAD systems | Type | Book Chapter | ||
| Year | 1994 | Publication | Advances in Pattern Recognition and Image Analysis, | Abbreviated Journal | |
| Volume | Issue | Pages | 158-169 | ||
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| Publisher | World Scientific Pub. | Place of Publication | Editor | ||
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ISBN | 981-02-1872-9 | Medium | ||
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| Notes | IAM;ISE | Approved | no | ||
| Call Number | IAM @ iam @ MRL1994 | Serial | 1609 | ||
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| Author | Enric Marti; Jordi Regincos; Jaime Lopez-Krahe | ||||
| Title | Interpretación de Dibujos Lineales a Mano Alzada Representando Escenas Tridimensionales | Type | Conference Article | ||
| Year | 1991 | Publication | Primer Congreso Español de Informática. | Abbreviated Journal | |
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| Notes | IAM | Approved | no | ||
| Call Number | IAM @ iam @ MRL1991 | Serial | 1610 | ||
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| Author | Enric Marti; Jaume Rocarias; Petia Radeva; Ricardo Toledo; Jordi Vitria | ||||
| Title | Caronte: diseño, implementación y mejora de actividades de evaluación y primeras experiencias en asignaturas | Type | Miscellaneous | ||
| Year | 2008 | Publication | Abbreviated Journal | ||
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| Publisher | Place of Publication | Lleida | Editor | ||
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| Notes | IAM;RV;OR;MILAB;ADAS;MV | Approved | no | ||
| Call Number | IAM @ iam @ MRR2008 | Serial | 1612 | ||
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| Author | Enric Marti; Jaume Rocarias; Petia Radeva; Ricardo Toledo; Jordi Vitria | ||||
| Title | Caronte: implementació i millora d activitats d avaluació i primeres experiències amb diferents organitzacions docents | Type | Miscellaneous | ||
| Year | 2007 | Publication | IV Jornades d’Innovació Docent UAB | Abbreviated Journal | |
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| Publisher | Place of Publication | Bellaterra (Spain) | Editor | ||
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| Notes | IAM;RV;OR;MILAB;ADAS;MV | Approved | no | ||
| Call Number | IAM @ iam @ MRR2007 | Serial | 1614 | ||
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| Author | Enric Marti; Jordi Rocarias; Ricardo Toledo | ||||
| Title | Caront: gestió flexible de grups d’alumnes en una asignatura i activitats sobre grups. Nova activitat de control | Type | Miscellaneous | ||
| Year | 2008 | Publication | V Jornades d’Innovació Docent | Abbreviated Journal | |
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| Notes | IAM;RV;CIC;ADAS | Approved | no | ||
| Call Number | IAM @ iam @ MRT2008a | Serial | 1617 | ||
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| Author | Enric Marti; Jaume Rocarias; Ricardo Toledo | ||||
| Title | Caronte: gestión flexible de grupos de alumnos en asignaturas de universidad y actividades sobre estos grupos | Type | Miscellaneous | ||
| Year | 2008 | Publication | Nueva actividad de control, MoodleMoot 2008 | Abbreviated Journal | |
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| Publisher | Place of Publication | Barcelona | Editor | ||
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| Notes | IAM;RV;ADAS | Approved | no | ||
| Call Number | IAM @ iam @ MRT2008b | Serial | 1618 | ||
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| Author | Enric Marti; Jordi Vitria; Alberto Sanfeliu | ||||
| Title | Reconocimiento de Formas y Análisis de Imágenes | Type | Book Whole | ||
| Year | 1998 | Publication | Asociación Española de Reconocimientos de Formas y Análisis de Imágenes | Abbreviated Journal | |
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| Abstract | Los sistemas actuales de reconocimiento automático del lenguaje oral se basan en dos etapas básicas de procesado: la parametrización, que extrae la evolución temporal de los parámetros que caracterizan la voz, y el reconocimiento propiamente dicho, que identifica la cadena de palabras de la elocución recibida con ayuda de los modelos que representan el conocimiento adquirido en la etapa de aprendizaje. Tomando como línea divisoria la palabra, dichos modelos son de tipo acústicofonético o gramatical. Los primeros caracterizan las palabras incluidas en el vocabulario de la aplicación o tarea a la que está orientado el sistema de reconocimiento, usando a menudo para ello modelos de unidades de habla de extensión inferior a la palabra, es decir, de unidades subléxicas. Por otro lado, la gramática incluye el conocimiento acerca de las combinaciones permitidas de palabras para formar las frases o su probabilidad. Queda fuera del esquema la denominada comprensión del habla, que utiliza adicionalmente el conocimiento semántico y pragmático para captar el significado de la elocución de entrada al sistema a partir de la cadena (o cadenas alternativas) de palabras que suministra el reconocedor. | ||||
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| Publisher | AERFAI | Place of Publication | Editor | ||
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ISBN | 84–922529–4–4 | Medium | ||
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| Notes | IAM;OR;MV | Approved | no | ||
| Call Number | IAM @ iam @ MVS1998 | Serial | 1620 | ||
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| Author | Josefina Mauri; Eduard Fernandez-Nofrerias; B. Garcia del Blanco; E. Iraculis; J.A. Gomez-Hospital; J. Comin; M.A. Sanchez Corral; F. Jara; A. Cequier; E. Esplugas; Debora Gil; J. Saludes; Petia Radeva; Ricardo Toledo; Juan J.Villanueva | ||||
| Title | Moviment del vas en l anàlisi d imatges d ecografia intracoronària: un model matemàtic | Type | Conference Article | ||
| Year | 2000 | Publication | Congrés de la Societat Catalana de Cardiologia. | Abbreviated Journal | |
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| Notes | IAM;RV;ISE;MILAB;ADAS | Approved | no | ||
| Call Number | IAM @ iam @ MNG2000 | Serial | 1621 | ||
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| Author | Josefina Mauri; Eduard Fernandez-Nofrerias; J. Comin; B. Garcia del Blanco; E. Iraculis; J.A. Gomez-Hospital; P. Valdovinos; F. Jara; A. Cequier; E. Esplugas; Oriol Pujol; Cristina Cañero; Debora Gil; Petia Radeva; Ricardo Toledo | ||||
| Title | Avaluació del Conjunt Stent/Artèria mitjançant ecografia intracoronària: lentorn informàtic | Type | Conference Article | ||
| Year | 2000 | Publication | Congrés de la Societat Catalana de Cardiologia. | Abbreviated Journal | |
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| Notes | IAM;RV;MILAB;ADAS;HuPBA | Approved | no | ||
| Call Number | IAM @ iam @ MNC2000 | Serial | 1622 | ||
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| Author | Maurizio Mencuccini; Jordi Martinez-Vilalta; Josep Piñol; Lasse Loepfe; Mireia Burnat ; Xavier Alvarez; Juan Camacho; Debora Gil | ||||
| Title | A quantitative and statistically robust method for the determination of xylem conduit spatial distribution | Type | Journal Article | ||
| Year | 2010 | Publication | American Journal of Botany | Abbreviated Journal | AJB |
| Volume | 97 | Issue | 8 | Pages | 1247-1259 |
| Keywords | Geyer; hydraulic conductivity; point pattern analysis; Ripley; Spatstat; vessel clusters; xylem anatomy; xylem network | ||||
| Abstract | Premise of the study: Because of their limited length, xylem conduits need to connect to each other to maintain water transport from roots to leaves. Conduit spatial distribution in a cross section plays an important role in aiding this connectivity. While indices of conduit spatial distribution already exist, they are not well defined statistically. * Methods: We used point pattern analysis to derive new spatial indices. One hundred and five cross-sectional images from different species were transformed into binary images. The resulting point patterns, based on the locations of the conduit centers-of-area, were analyzed to determine whether they departed from randomness. Conduit distribution was then modeled using a spatially explicit stochastic model. * Key results: The presence of conduit randomness, uniformity, or aggregation depended on the spatial scale of the analysis. The large majority of the images showed patterns significantly different from randomness at least at one spatial scale. A strong phylogenetic signal was detected in the spatial variables. * Conclusions: Conduit spatial arrangement has been largely conserved during evolution, especially at small spatial scales. Species in which conduits were aggregated in clusters had a lower conduit density compared to those with uniform distribution. Statistically sound spatial indices must be employed as an aid in the characterization of distributional patterns across species and in models of xylem water transport. Point pattern analysis is a very useful tool in identifying spatial patterns. | ||||
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| Notes | IAM; | Approved | no | ||
| Call Number | IAM @ iam @ MMG2010 | Serial | 1623 | ||
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| Author | J.A.Perez; Enric Marti; Juan J.Villanueva | ||||
| Title | Interfase de Usuario de Entrada de Datos 3D en un CAD de Cartografía Urbana a partir de Pares Estereoscópicos | Type | Conference Article | ||
| Year | 1992 | Publication | II Congreso Español de Informática Gráfica | Abbreviated Journal | |
| Volume | Issue | Pages | 47-60 | ||
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| Area | Expedition | Conference | CEIG | ||
| Notes | IAM;ISE | Approved | no | ||
| Call Number | IAM @ iam @ PVM1992 | Serial | 1624 | ||
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| Author | Ferran Poveda | ||||
| Title | Visualització i interpretació tridimensional de l’arquitectura de les fibres musculars del miocardi | Type | Report | ||
| Year | 2009 | Publication | Master en Tecnologies Multimedia | Abbreviated Journal | |
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| Corporate Author | Thesis | Master's thesis | |||
| Publisher | Place of Publication | 08193 Bellaterra, Barcelona (Spain) | Editor | ||
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| Notes | IAM; | Approved | no | ||
| Call Number | IAM @ iam @ Pov2009 | Serial | 1625 | ||
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