| Records |
| Author |
Josep Llados;Horst Bunke; Enric Marti |
| Title |
Using Cyclic String Matching to Find Rotational and Reflectional Symmetries in Shapes |
Type |
Conference Article |
| Year |
1997 |
Publication |
Intelligent Robots: Sensing, Modeling and Planning |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
164-179 |
| Keywords |
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| Abstract |
Dagstuhl Workshop |
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| Publisher |
World Scientific Press |
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Edition |
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ISBN |
9810231857 |
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Expedition |
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Conference |
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| Notes |
DAG;IAM; |
Approved |
no |
| Call Number |
IAM @ iam @ LBM1997b |
Serial |
1563 |
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| Author |
Josep Llados; Jaime Lopez-Krahe; Enric Marti |
| Title |
A system to understand hand-drawn floor plans using subgraph isomorphism and Hough transform |
Type |
Book Chapter |
| Year |
1997 |
Publication |
Machine Vision and Applications |
Abbreviated Journal |
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| Volume |
10 |
Issue |
3 |
Pages |
150-158 |
| Keywords |
Line drawings – Hough transform – Graph matching – CAD systems – Graphics recognition |
| Abstract |
Presently, man-machine interface development is a widespread research activity. A system to understand hand drawn architectural drawings in a CAD environment is presented in this paper. To understand a document, we have to identify its building elements and their structural properties. An attributed graph structure is chosen as a symbolic representation of the input document and the patterns to recognize in it. An inexact subgraph isomorphism procedure using relaxation labeling techniques is performed. In this paper we focus on how to speed up the matching. There is a building element, the walls, characterized by a hatching pattern. Using a straight line Hough transform (SLHT)-based method, we recognize this pattern, characterized by parallel straight lines, and remove from the input graph the edges belonging to this pattern. The isomorphism is then applied to the remainder of the input graph. When all the building elements have been recognized, the document is redrawn, correcting the inaccurate strokes obtained from a hand-drawn input. |
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DAG;IAM |
Approved |
no |
| Call Number |
IAM @ iam @ LLM1997a |
Serial |
1566 |
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| Author |
Josep Llados; Jaime Lopez-Krahe; Gemma Sanchez; Enric Marti |
| Title |
Interprétation de cartes et plans par mise en correspondance de graphes de attributs |
Type |
Conference Article |
| Year |
2000 |
Publication |
12 Congrès Francophone AFRIF–AFIA |
Abbreviated Journal |
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| Volume |
3 |
Issue |
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Pages |
225-234 |
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Conference |
RFIA |
| Notes |
DAG;IAM |
Approved |
no |
| Call Number |
IAM @ iam @ LLS2000 |
Serial |
1567 |
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| Author |
Josep Llados; Enric Marti |
| Title |
A graph-edit algorithm for hand-drawn graphical document recognition and their automatic introduction into CAD systems |
Type |
Journal Article |
| Year |
1999 |
Publication |
Machine Graphics & Vision |
Abbreviated Journal |
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| Volume |
8 |
Issue |
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Pages |
195-211 |
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| Notes |
DAG;IAM; |
Approved |
no |
| Call Number |
IAM @ iam @ LIM1999 |
Serial |
1568 |
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| Author |
Josep Llados; Enric Marti |
| Title |
Graph-edit algorithms for hand-drawn graphical document recognition and their automatic introduction |
Type |
Journal Article |
| Year |
1999 |
Publication |
Machine Graphics & Vision journal, special issue on Graph transformation |
Abbreviated Journal |
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Issue |
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Pages |
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| Notes |
DAG;IAM |
Approved |
no |
| Call Number |
IAM @ iam @ LIM1999c |
Serial |
1569 |
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| Author |
Josep Llados; Enric Marti |
| Title |
Playing with error-tolerant subgraph isomorphism in line drawings |
Type |
Conference Article |
| Year |
1997 |
Publication |
VII National Symposium on Pattern Recognition and image Analysis |
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| Notes |
DAG;IAM; |
Approved |
no |
| Call Number |
IAM @ iam @ LlM1997 |
Serial |
1570 |
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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 |
| Keywords |
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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. |
| Address |
London, UK |
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| Publisher |
Springer-Verlag |
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Editor |
Dorothea Blostein and Young- Bin Kwon |
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Series Title |
Lecture Notes in Computer Science |
Abbreviated Series Title |
LNCS |
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Series Issue |
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Edition |
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| ISSN |
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ISBN |
3-540-44066-6 |
Medium |
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Expedition |
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Conference |
GREC |
| Notes |
DAG; IAM; |
Approved |
no |
| Call Number |
IAM @ iam @ LVS2002 |
Serial |
1572 |
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| Author |
Josep Llados; Gemma Sanchez; Enric Marti |
| Title |
A string based method to recognize symbols and structural textures in architectural plans |
Type |
Book Chapter |
| Year |
1998 |
Publication |
Graphics Recognition Algorithms and Systems Second International Workshop, GREC' 97 Nancy, France, August 22–23, 1997 Selected Papers |
Abbreviated Journal |
LNCS |
| Volume |
1389 |
Issue |
1998 |
Pages |
91-103 |
| Keywords |
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| Abstract |
This paper deals with the recognition of symbols and structural textures in architectural plans using string matching techniques. A plan is represented by an attributed graph whose nodes represent characteristic points and whose edges represent segments. Symbols and textures can be seen as a set of regions, i.e. closed loops in the graph, with a particular arrangement. The search for a symbol involves a graph matching between the regions of a model graph and the regions of the graph representing the document. Discriminating a texture means a clustering of neighbouring regions of this graph. Both procedures involve a similarity measure between graph regions. A string codification is used to represent the sequence of outlining edges of a region. Thus, the similarity between two regions is defined in terms of the string edit distance between their boundary strings. The use of string matching allows the recognition method to work also under presence of distortion. |
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| Publisher |
Springer Link |
Place of Publication |
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| Language |
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Original Title |
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| Series Editor |
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Series Title |
LNCS |
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Edition |
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| Notes |
DAG; IAM |
Approved |
no |
| Call Number |
IAM @ iam @ SLE1998 |
Serial |
1573 |
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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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| Volume |
1 |
Issue |
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Pages |
151–178. |
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ISBN |
81-86846-61-1 |
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Conference |
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| Notes |
DAG;IAM |
Approved |
no |
| Call Number |
IAM @ iam @ LVM2000 |
Serial |
1575 |
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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 |
Abbreviated Journal |
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Issue |
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Pages |
1-13 |
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| Address |
Angers, France |
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| Publisher |
ICEIS Press |
Place of Publication |
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Edition |
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ISBN |
972-98816-3-4 |
Medium |
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Conference |
PRIS'03 |
| Notes |
DAG;IAM; |
Approved |
no |
| Call Number |
IAM @ iam @ LVS2003 |
Serial |
1576 |
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| Author |
Josep Llados; Enric Marti |
| Title |
Interpretacio de dibuixos lineals mitjançant tècniques d isomorfisme entre grafs |
Type |
Conference Article |
| Year |
1995 |
Publication |
Trobada de Joves Investigadors |
Abbreviated Journal |
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L’anàlisi de documents té com a objectiu la interpretació automàtica de documents impresos sobre paper, amb la finalitat d’obtenir una descripció simbòlica d’aquests, que permeti el seu emmagatzemament i posterior tractament computacional. Les tècniques basades en grafs relacionals d’atributs permeten representar de manera compacta la informació continguda en dibuixos lineals i mitjançant mecanismes d’isomorfisme entre grafs, reconèixer-hi certes estructures i d’aquesta manera, interpretar el document. En aquest treball es dóna una visió general de les tènciques de grafs aplicades al reconeixement visual d’objectes en problemes d’anàlisi de documents. Aquestes tècniques s’il·lustren amb un exemple de reconeixement de plànols dibuixats a mà alçada. Finalment es proposa la utilització de tècniques de Hough com a mecanisme per accelerar el procés de reconeixement aplicant un cert coneixement sobre el domini en el que es treballa |
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| Notes |
DAG;IAM |
Approved |
no |
| Call Number |
IAM @ iam @ LlM1995 |
Serial |
1578 |
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| Author |
Josep Llados; Enric Marti; Jaime Lopez-Krahe |
| Title |
A Hough-based method for hatched pattern detection in maps and diagrams |
Type |
Conference Article |
| Year |
1999 |
Publication |
Proceeding of the Fifth Int. Conf. Document Analysis and Recognition ICDAR ’99 |
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Issue |
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Pages |
479-482 |
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| Abstract |
A hatched area is characterized by a set of parallel straight lines placed at regular intervals. In this paper, a Hough-based schema is introduced to recognize hatched areas in technical documents from attributed graph structures representing the document once it has been vectorized. Defining a Hough-based transform from a graph instead of the raster image allows to drastically reduce the processing time and, second, to obtain more reliable results because straight lines have already been detected in the vectorization step. A second advantage of the proposed method is that no assumptions must be made a priori about the slope and frequency of hatching patterns, but they are computed in run time for each hatched area. |
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| Notes |
DAG;IAM; |
Approved |
no |
| Call Number |
IAM @ iam @ LIM1999b |
Serial |
1580 |
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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 |
| Keywords |
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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; |
Approved |
no |
| Call Number |
IAM @ iam @ LMV2001 |
Serial |
1581 |
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| Author |
Enric Marti; Ferran Poveda; Antoni Gurgui; Debora Gil |
| Title |
Aprendizaje Basado en Proyectos en Ingeniería Informática. Resultados y reflexiones de seis años de experiencia |
Type |
Miscellaneous |
| Year |
2011 |
Publication |
Actas del Simposio-Taller JENUI 2011 |
Abbreviated Journal |
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Issue |
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Pages |
1-8 |
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| Abstract |
In this workshop a 6 years experience in Project Based Learning (PBL) in Computer Graphics, Computer Engineering course at the Autonomous University of Barcelona (UAB) is presented. We use a Moodle environment suited to manage the documentation generated in PBL. The course is organized by means of two alternative routes: a classic itinerary of lectures and test-based evaluation and another with PBL. In the PBL itinerary we explain the organization in teamgroups, homework tutoring and monitoring and evaluation guidelines for students. We provide some of the work done by students, and the results of assessment surveys carried out to students during these years. We report the evolution of our PBL itinerary in terms of, both, organization and student surveys.
The workshop aims at discussing about on the advantages and disadvantages of using these active methodologies in technical degrees such as computer engineering, in order to debate about the most suitable way of organizing PBL and assessing students learning rate. |
| Address |
Sevilla, Spain |
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| Language |
spanish |
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ISBN |
978-84-694-5440-4 |
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Conference |
JENUI |
| Notes |
IAM |
Approved |
no |
| Call Number |
IAM @ iam @ MPG2011 |
Serial |
1584 |
| Permanent link to this record |
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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 |
Type |
Miscellaneous |
| Year |
2008 |
Publication |
revista EINES |
Abbreviated Journal |
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| Volume |
6 |
Issue |
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Pages |
85-99 |
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| Notes |
IAM |
Approved |
no |
| Call Number |
IAM @ iam @ MAR2008b |
Serial |
1585 |
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