| Records |
| Author |
Enric Marti; Debora Gil; Carme Julia |
| Title |
Una experiencia de PBL en la docencia de la asignatura de Graficos por Computador en Ingenieria Informatica |
Type |
Miscellaneous |
| Year |
2006 |
Publication |
IV Contreso Internacional de Docencia Universitaria e Innovacion |
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| Volume |
1 |
Issue |
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Pages |
375 |
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Barcelona (Spain) |
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IAM;ADAS; |
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IAM @ iam @ MGJ2006b |
Serial |
931 |
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| Author |
Enric Marti; Debora Gil; Carme Julia |
| Title |
Una experiència en PBL per a la docència de Gràfics per Computador |
Type |
Miscellaneous |
| Year |
2005 |
Publication |
II Jornades d’innovació Docent |
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Aprenentatge Basat en Projectes; Aprenentatge Basat en Problemes; Problem Based Learning; ECTS; EEES; Computer Graphics; OpenGL. |
| Abstract |
En aquest article es presenta una experiència en ABP feta el curs 2004-05 en Gràfics per Computador 2, assignatura optativa de 3er curs d’Enginyeria Informàtica impartida a l’ETSE. En l’article s’explica l’organització docent abans d’ABP, basada en classes magistrals. Després es mostra l’organització en ABP i es quantifica en ECTS l’esforç de l’alumne en ambdues organitzacions. Essent conscient del diferent interès de l’alumnat per l’assignatura, se’ls hi ofereix dos itineraris: el de classes magistrals i d’ABP. Es mostren alguns resultats dels alumnes d’ABP i també les primeres enquestes realitzades als alumnes. S’exposen les conclusions en el primer any de l’experiència, plantejant temes de discussió. S’ha procurat que la proposta no desbordi l’esforç del professorat. Per això s’ofereix el doble itinerari, per a canalitzar per ABP els alumnes més interessats i permetre a la resta que realitzin el curs amb l’organització clàsica de l’assignatura: classes magistrals de teoria, problemes i pràctiques. |
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IAM;ADAS; |
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no |
| Call Number |
IAM @ iam @ MGJ2005c |
Serial |
1594 |
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| Author |
Enric Marti; Debora Gil; Carme Julia |
| Title |
A PBL experience in the teaching of Computer Graphics |
Type |
Conference Article |
| Year |
2005 |
Publication |
EUROGRAPHICS Proceedings |
Abbreviated Journal |
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| Volume |
5 |
Issue |
1 |
Pages |
95-103 |
| Keywords |
project-based learning; computer graphics education; Open GL; rendering techniques; computer animation techniques; Graphics packages; Hierarchy and geometric transformations; Animation; Color; shading; shadowing and texture; fractals; hidden line/surface removal; Problem Based Learning |
| 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. |
| Address |
Dublin; Ireland; September 2005 |
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EUROGRAPHICS |
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IAM;ADAS; |
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no |
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IAM @ iam @ MGJ2005 |
Serial |
1593 |
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| Author |
Patricia Marquez; Debora Gil; Aura Hernandez-Sabate; Daniel Kondermann |
| Title |
When Is A Confidence Measure Good Enough? |
Type |
Conference Article |
| Year |
2013 |
Publication |
9th International Conference on Computer Vision Systems |
Abbreviated Journal |
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| Volume |
7963 |
Issue |
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Pages |
344-353 |
| Keywords |
Optical flow, confidence measure, performance evaluation |
| Abstract |
Confidence estimation has recently become a hot topic in image processing and computer vision.Yet, several definitions exist of the term “confidence” which are sometimes used interchangeably. This is a position paper, in which we aim to give an overview on existing definitions,
thereby clarifying the meaning of the used terms to facilitate further research in this field. Based on these clarifications, we develop a theory to compare confidence measures with respect to their quality. |
| Address |
St Petersburg; Russia; July 2013 |
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Springer Link |
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LNCS |
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Edition |
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0302-9743 |
ISBN |
978-3-642-39401-0 |
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Conference |
ICVS |
| Notes |
IAM;ADAS; 600.044; 600.057; 600.060; 601.145 |
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no |
| Call Number |
IAM @ iam @ MGH2013a |
Serial |
2218 |
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| Author |
Patricia Marquez;Debora Gil;Aura Hernandez-Sabate |
| Title |
A Complete Confidence Framework for Optical Flow |
Type |
Conference Article |
| Year |
2012 |
Publication |
12th European Conference on Computer Vision – Workshops and Demonstrations |
Abbreviated Journal |
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| Volume |
7584 |
Issue |
2 |
Pages |
124-133 |
| Keywords |
Optical flow, confidence measures, sparsification plots, error prediction plots |
| Abstract |
Medial representations are powerful tools for describing and parameterizing the volumetric shape of anatomical structures. Existing methods show excellent results when applied to 2D objects, but their quality drops across dimensions. This paper contributes to the computation of medial manifolds in two aspects. First, we provide a standard scheme for the computation of medial manifolds that avoid degenerated medial axis segments; second, we introduce an energy based method which performs independently of the dimension. We evaluate quantitatively the performance of our method with respect to existing approaches, by applying them to synthetic shapes of known medial geometry. Finally, we show results on shape representation of multiple abdominal organs, exploring the use of medial manifolds for the representation of multi-organ relations. |
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Springer-Verlag |
Place of Publication |
Florence, Italy, October 7-13, 2012 |
Editor |
Andrea Fusiello, Vittorio Murino ,Rita Cucchiara |
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LNCS |
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978-3-642-33867-0 |
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ECCVW |
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IAM;ADAS; |
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IAM @ iam @ MGH2012b |
Serial |
1991 |
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| Author |
Patricia Marquez; Debora Gil ; Aura Hernandez-Sabate |
| Title |
Error Analysis for Lucas-Kanade Based Schemes |
Type |
Conference Article |
| Year |
2012 |
Publication |
9th International Conference on Image Analysis and Recognition |
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| Volume |
7324 |
Issue |
I |
Pages |
184-191 |
| Keywords |
Optical flow, Confidence measure, Lucas-Kanade, Cardiac Magnetic Resonance |
| Abstract |
Optical flow is a valuable tool for motion analysis in medical imaging sequences. A reliable application requires determining the accuracy of the computed optical flow. This is a main challenge given the absence of ground truth in medical sequences. This paper presents an error analysis of Lucas-Kanade schemes in terms of intrinsic design errors and numerical stability of the algorithm. Our analysis provides a confidence measure that is naturally correlated to the accuracy of the flow field. Our experiments show the higher predictive value of our confidence measure compared to existing measures. |
| Address |
Aveiro, Portugal |
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| Publisher |
Springer-Verlag Berlin Heidelberg |
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english |
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Campilho, Aurélio and Kamel, Mohamed |
Series Title |
Lecture Notes in Computer Science |
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LNCS |
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0302-9743 |
ISBN |
978-3-642-31294-6 |
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Conference |
ICIAR |
| Notes |
IAM |
Approved |
no |
| Call Number |
IAM @ iam @ MGH2012a |
Serial |
1899 |
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| Author |
Patricia Marquez; Debora Gil; Aura Hernandez-Sabate |
| Title |
A Confidence Measure for Assessing Optical Flow Accuracy in the Absence of Ground Truth |
Type |
Conference Article |
| Year |
2011 |
Publication |
IEEE International Conference on Computer Vision – Workshops |
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Pages |
2042-2049 |
| Keywords |
IEEE International Conference on Computer Vision – Workshops |
| Abstract |
Optical flow is a valuable tool for motion analysis in autonomous navigation systems. A reliable application requires determining the accuracy of the computed optical flow. This is a main challenge given the absence of ground truth in real world sequences. This paper introduces a measure of optical flow accuracy for Lucas-Kanade based flows in terms of the numerical stability of the data-term. We call this measure optical flow condition number. A statistical analysis over ground-truth data show a good statistical correlation between the condition number and optical flow error. Experiments on driving sequences illustrate its potential for autonomous navigation systems. |
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IEEE |
Place of Publication |
Barcelona (Spain) |
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English |
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English |
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ICCVW |
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IAM; ADAS |
Approved |
no |
| Call Number |
IAM @ iam @ MGH2011 |
Serial |
1682 |
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| Author |
Enric Marti; S.Fernandez; G.Estape |
| Title |
BlueStar: implementació d’una aplicació per a la visualització 3D de funcions reals, com a eina d’aprenentatge |
Type |
Miscellaneous |
| Year |
2007 |
Publication |
IV Jornades d’Innovació Docent UAB |
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Bellaterra (Spain) |
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IAM; |
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no |
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IAM @ iam @ MFE2007 |
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1591 |
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| Author |
Enric Marti; G.Estape; S.Fernandez |
| Title |
Bluestar: Diseño e implementación de una aplicación para la visualización interactiva en 3D de funciones reales como herramienta de aprendizaje |
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Miscellaneous |
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2008 |
Publication |
V Congreso Internacional Docencia Universitaria e Innovación |
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Lleida |
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IAM; |
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no |
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IAM @ iam @ MEF2008 |
Serial |
1590 |
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| Author |
Enric Marti; Xavier Binefa; G.EstapeRV |
| Title |
Caronte, plataforma para la gestión de la actividad docente de una asignatura. Análisis de su impacto en ingenierías, para su adaptación al EEES |
Type |
Miscellaneous |
| Year |
2008 |
Publication |
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, Ministerio de Ciencia e Innovacion, DGU |
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Direccion General de Universidades |
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IAM;OR;RV |
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no |
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IAM @ iam @ MBE2008 |
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1589 |
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| Author |
Patricia Marquez |
| Title |
Conditions Ensuring Accuracy of Local Optical Flow Schemes |
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Report |
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2010 |
Publication |
CVC Tehcnical Report |
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157 |
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Accurate computation of optical flow is a key-point in many image processing fields. Detection of anomalous and unpredicted agents (such as pedestrians, bikers or cars) in urban scenes or pathology discrimination in medical imaging sequences, to mention just a two. The above kinds sequences present two main difficulties for standard optical flow techniques. On one hand, variability in acquisition conditions (illuminance, medical imaging modality, ...) force an alterantive representation for images fulfilling the britghtness constancy constrain. On the hand, current variational schemes produce oversmoothed fields unable to properly model discontinuous behaviours such as collisions or functionless pathological areas. This master project explores the abilities and limitations of local and global optical flow approaches. The master student will put especial emphasis in the theoretical grounds behind in order to design a variational framework combining the theoretical advantages of the considered techniques. In particular an optical flow based on Gabor phase tracking (developed in the group for medical imaging) will be generalized to urban scenes. |
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Master's thesis |
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Bellaterra 08193, Barcelona, Spain |
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IAM; |
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no |
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IAM @ iam @ Mar2010 |
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1582 |
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| Author |
Enric Marti |
| Title |
Aplicació de la metodología d’Aprenentatge basat en Proyectes en l’assignatura de Gràfics per Computador d’enginyeria Informàtica. Balanç de Quatre anys d’experiència |
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Miscellaneous |
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2008 |
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revista EINES |
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6 |
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85-99 |
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IAM |
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no |
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IAM @ iam @ MAR2008b |
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1585 |
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| Author |
Enric Marti |
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Project Based Learning in engineering |
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Miscellaneous |
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2008 |
Publication |
Simposium on Problem Based learning (PBL) |
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IAM |
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IAM @ iam @ MAR2008a |
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1586 |
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| Author |
Enric Marti |
| Title |
Análisis de elementos gráficos en documentos |
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Report |
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1996 |
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CVC Technical Report |
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9 |
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En este texto se presenta un estudio sobre las t’ecnicas y aplicaciones de an’alisis de documentos, y más concretamente abordando la problem’atica del an’alisis de de entidades gr’aficas. El ’area de an’alisis de documentos tiene como objetivo la interpretaci’on de documentos impresos sobre papel por m’etodos computacionales, para obtener una descripci’on con un alto nivel de abstracci’on, que permita su posterior tratamiento y archivo por m’etodos inform’aticos. Este objetivo, junto a los trabajos realizados hasta el momento, le otorgan a esta ’area un amplio ’ambito de aplicaciones para la manipulaci’on y archivo de documentos sobre papel, que puede llegar a significar un salto cualitativo importante (del papel al disco ’optico) en el uso de soportes de informaci’on, debido a las importantes prestaciones de acceso y capacidad de archivo que suponen los medios inform’aticos. Generalmente los documentos son introducidos en los sistemas de an’alisis de documentos mediante scanner, obt... |
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Computer Vision Centre |
Place of Publication |
CVC UAB |
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IAM; |
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IAM @ iam @ Mar1996 |
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1587 |
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| Author |
Enric Marti; Jordi Regincos; Jaime Lopez-Krahe; Juan J.Villanueva |
| Title |
A system for interpretation of hand line drawings as three-dimensional scene for CAD input |
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Conference Article |
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1991 |
Publication |
Proceedings of the First International Conference on Document Analysis and Recognition |
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472-480 |
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IAM;ISE |
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IAM @ iam @ Mar1991 |
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1494 |
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