| Records |
| Author |
Josep Llados; Enric Marti; Jordi Regincos |
| Title |
Interpretación de diseños a mano alzada como técnica de entrada a un sistema CAD en un ámbito de arquitectura |
Type |
Conference Article |
| Year |
1993 |
Publication |
III National Conference on Computer Graphics |
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| Abstract |
En los últimos años, se ha introducido ámpliamente el uso de los sistemas CAD en dominios relacionados con la arquitectura. Dichos sistemas CAD son muy útiles para el arquitecto en el diseño de planos de plantas de edificios. Sin embargo, la utilización eficiente de un CAD requiere un tiempo de aprendizaje, en especial, en la etapa de creación y edición del diseño. Además, una vez familiarizado con un CAD, el arquitecto debe adaptarse a la simbología que éste le permite que, en algunos casos puede ser poco flexible.Con esta motivación, se propone una técnica alternativa de entrada de documentos en sistemas CAD. Dicha técnica se basa en el diseño del plano sobre papel mediante un dibujo lineal hecho a mano alzada a modo de boceto e introducido mediante scanner. Una vez interpretado este dibujo inicial e introducido en el CAD, el arquitecto sólo deber hacer sobre éste los retoques finales del documento.El sistema de entrada propuesto se compone de dos módulos principales: En primer lugar, la extracción de características (puntos característicos, rectas y arcos) de la imagen obtenida mediante scanner. En dicho módulo se aplican principalmente técnicas de procesamiento de imágenes obteniendo como resultado una representaci¢n del dibujo de entrada basada en grafos de atributos. El objetivo del segundo módulo es el de encontrar y reconocer las entidades integrantes del documento (puertas, mesas, etc.) en base a una biblioteca de símbolos definida en el sistema CAD. La implementación de dicho módulo se basa en técnicas de isomorfismo de grafos.El sistema propone una alternativa que permita, mediante el diseño a mano alzada, la introducción de la informaci¢n m s significativa del plano de forma rápida, sencilla y estandarizada por parte del usuario. |
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Granada |
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DAG;IAM; |
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IAM @ iam @ LMR1993 |
Serial |
1571 |
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| Author |
Josep Llados; Enric Marti; Juan J.Villanueva |
| Title |
Symbol recognition by error-tolerant subgraph matching between region adjacency graphs |
Type |
Journal Article |
| Year |
2001 |
Publication |
IEEE Transactions on Pattern Analysis and Machine Intelligence |
Abbreviated Journal |
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| Volume |
23 |
Issue |
10 |
Pages |
1137-1143 |
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| Abstract |
The recognition of symbols in graphic documents is an intensive research activity in the community of pattern recognition and document analysis. A key issue in the interpretation of maps, engineering drawings, diagrams, etc. is the recognition of domain dependent symbols according to a symbol database. In this work we first review the most outstanding symbol recognition methods from two different points of view: application domains and pattern recognition methods. In the second part of the paper, open and unaddressed problems involved in symbol recognition are described, analyzing their current state of art and discussing future research challenges. Thus, issues such as symbol representation, matching, segmentation, learning, scalability of recognition methods and performance evaluation are addressed in this work. Finally, we discuss the perspectives of symbol recognition concerning to new paradigms such as user interfaces in handheld computers or document database and WWW indexing by graphical content. |
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DAG;IAM;ISE; |
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| Call Number |
IAM @ iam @ LMV2001 |
Serial |
1581 |
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| Author |
Ole Larsen; Petia Radeva; Enric Marti |
| Title |
Calculating the Bounds on the Optimal Parameters of Elasticity for a Snake |
Type |
Report |
| Year |
1994 |
Publication |
Technical Report |
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| Address |
Aalborg University |
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Aalborg University, Laboratory of image Analysis. |
Place of Publication |
Denmark |
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Aalborg University, Laboratory of image Analysis. |
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| Notes |
MILAB;IAM |
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no |
| Call Number |
IAM @ iam @ LRM1994 |
Serial |
1560 |
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| Author |
Ole Larsen; Petia Radeva; Enric Marti |
| Title |
Bounds on the optimal elasticity parameters for a snake |
Type |
Journal Article |
| Year |
1995 |
Publication |
Image Analysis and Processing |
Abbreviated Journal |
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Issue |
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Pages |
37-42 |
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| Abstract |
This paper develops a formalism by which an estimate for the upper and lower bounds for the elasticity parameters for a snake can be obtained. Objects different in size and shape give rise to different bounds. The bounds can be obtained based on an analysis of the shape of the object of interest. Experiments on synthetic images show a good correlation between the estimated behaviour of the snake and the one actually observed. Experiments on real X-ray images show that the parameters for optimal segmentation lie within the estimated bounds. |
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MILAB;IAM |
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no |
| Call Number |
IAM @ iam @ LRM1995a |
Serial |
1559 |
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| Author |
Ole Vilhelm-Larsen; Petia Radeva; Enric Marti |
| Title |
Guidelines for choosing optimal parameters of elasticity for snakes |
Type |
Book Chapter |
| Year |
1995 |
Publication |
Computer Analysis Of Images And Patterns |
Abbreviated Journal |
LNCS |
| Volume |
970 |
Issue |
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Pages |
106-113 |
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| Abstract |
This paper proposes a guidance in the process of choosing and using the parameters of elasticity of a snake in order to obtain a precise segmentation. A new two step procedure is defined based on upper and lower bounds on the parameters. Formulas, by which these bounds can be calculated for real images where parts of the contour may be missing, are presented. Experiments on segmentation of bone structures in X-ray images have verified the usefulness of the new procedure. |
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Lecture Notes in Computer Science |
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LNCS |
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MILAB;IAM |
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IAM @ iam @ LRM1995b |
Serial |
1558 |
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| Author |
Josep Llados; Ernest Valveny; Enric Marti |
| Title |
Symbol Recognition in Document Image Analysis: Methods and Challenges |
Type |
Journal Article |
| Year |
2000 |
Publication |
Recent Research Developments in Pattern Recognition, Transworld Research Network, |
Abbreviated Journal |
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1 |
Issue |
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Pages |
151–178. |
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ISBN |
81-86846-61-1 |
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DAG;IAM |
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no |
| Call Number |
IAM @ iam @ LVM2000 |
Serial |
1575 |
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| Author |
Josep Llados; Ernest Valveny; Gemma Sanchez; Enric Marti |
| Title |
Symbol recognition: current advances and perspectives |
Type |
Book Chapter |
| Year |
2002 |
Publication |
Graphics Recognition Algorithms And Applications |
Abbreviated Journal |
LNCS |
| Volume |
2390 |
Issue |
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Pages |
104-128 |
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| Abstract |
The recognition of symbols in graphic documents is an intensive research activity in the community of pattern recognition and document analysis. A key issue in the interpretation of maps, engineering drawings, diagrams, etc. is the recognition of domain dependent symbols according to a symbol database. In this work we first review the most outstanding symbol recognition methods from two different points of view: application domains and pattern recognition methods. In the second part of the paper, open and unaddressed problems involved in symbol recognition are described, analyzing their current state of art and discussing future research challenges. Thus, issues such as symbol representation, matching, segmentation, learning, scalability of recognition methods and performance evaluation are addressed in this work. Finally, we discuss the perspectives of symbol recognition concerning to new paradigms such as user interfaces in handheld computers or document database and WWW indexing by graphical content. |
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London, UK |
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Springer-Verlag |
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Editor |
Dorothea Blostein and Young- Bin Kwon |
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Lecture Notes in Computer Science |
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LNCS |
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ISBN |
3-540-44066-6 |
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Conference |
GREC |
| Notes |
DAG; IAM; |
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no |
| Call Number |
IAM @ iam @ LVS2002 |
Serial |
1572 |
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| Author |
Josep Llados; Ernest Valveny; Gemma Sanchez; Enric Marti |
| Title |
A Case Study of Pattern Recognition: Symbol Recognition in Graphic Documentsa |
Type |
Conference Article |
| Year |
2003 |
Publication |
Proceedings of Pattern Recognition in Information Systems |
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1-13 |
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Angers, France |
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ICEIS Press |
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ISBN |
972-98816-3-4 |
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Conference |
PRIS'03 |
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DAG;IAM; |
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no |
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IAM @ iam @ LVS2003 |
Serial |
1576 |
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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 |
Type |
Conference Article |
| Year |
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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| Author |
Enric Marti |
| Title |
Análisis de elementos gráficos en documentos |
Type |
Report |
| Year |
1996 |
Publication |
CVC Technical Report |
Abbreviated Journal |
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Issue |
9 |
Pages |
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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 |
| Title |
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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Lleida |
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IAM |
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no |
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IAM @ iam @ MAR2008a |
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1586 |
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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 |
Publication |
revista EINES |
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6 |
Issue |
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Pages |
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 |
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; 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 |
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Miscellaneous |
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2008 |
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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 |
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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IAM @ iam @ MEF2008 |
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1590 |
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