| Records |
| Author |
Enric Marti; Jordi Regincos;Jaime Lopez-Krahe; Juan J.Villanueva |
| Title |
Hand line drawing interpretation as three-dimensional objects |
Type |
Journal Article |
| Year |
1993 |
Publication |
Signal Processing – Intelligent systems for signal and image understanding |
Abbreviated Journal |
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| Volume |
32 |
Issue |
1-2 |
Pages |
91-110 |
| Keywords |
Line drawing interpretation; line labelling; scene analysis; man-machine interaction; CAD input; line extraction |
| Abstract |
In this paper we present a technique to interpret hand line drawings as objects in a three-dimensional space. The object domain considered is based on planar surfaces with straight edges, concretely, on ansextension of Origami world to hidden lines. The line drawing represents the object under orthographic projection and it is sensed using a scanner. Our method is structured in two modules: feature extraction and feature interpretation. In the first one, image processing techniques are applied under certain tolerance margins to detect lines and junctions on the hand line drawing. Feature interpretation module is founded on line labelling techniques using a labelled junction dictionary. A labelling algorithm is here proposed. It uses relaxation techniques to reduce the number of incompatible labels with the junction dictionary so that the convergence of solutions can be accelerated. We formulate some labelling hypotheses tending to eliminate elements in two sets of labelled interpretations. That is, those which are compatible with the dictionary but do not correspond to three-dimensional objects and those which represent objects not very probable to be specified by means of a line drawing. New entities arise on the line drawing as a result of the extension of Origami world. These are defined to enunciate the assumptions of our method as well as to clarify the algorithms proposed. This technique is framed in a project aimed to implement a system to create 3D objects to improve man-machine interaction in CAD systems. |
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Elsevier North-Holland, Inc. |
Place of Publication |
Amsterdam, The Netherlands, The Netherlands |
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0165-1684 |
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| Notes |
IAM;ISE; |
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no |
| Call Number |
IAM @ iam @ MRL1993 |
Serial |
1611 |
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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 |
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Place of Publication |
Lleida |
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| Notes |
IAM;RV;OR;MILAB;ADAS;MV |
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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 |
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Place of Publication |
Bellaterra (Spain) |
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IAM;RV;OR;MILAB;ADAS;MV |
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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 |
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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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Pages |
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Place of Publication |
Barcelona |
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| Notes |
IAM;RV;ADAS |
Approved |
no |
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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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Issue |
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Pages |
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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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AERFAI |
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Edition |
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ISBN |
84–922529–4–4 |
Medium |
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Expedition |
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Conference |
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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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Pages |
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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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Issue |
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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 |
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Issue |
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Pages |
47-60 |
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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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Issue |
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Pages |
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Thesis |
Master's thesis |
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Place of Publication |
08193 Bellaterra, Barcelona (Spain) |
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Edition |
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| Notes |
IAM; |
Approved |
no |
| Call Number |
IAM @ iam @ Pov2009 |
Serial |
1625 |
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| Author |
Ferran Poveda; Jaume Garcia; Enric Marti; Debora Gil |
| Title |
Validation of the myocardial architecture in DT-MRI tractography |
Type |
Conference Article |
| Year |
2010 |
Publication |
Medical Image Computing in Catalunya: Graduate Student Workshop |
Abbreviated Journal |
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Issue |
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Pages |
29-30 |
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| Abstract |
Deep understanding of myocardial structure may help to link form and funcion of the heart unraveling crucial knowledge for medical and surgical clinical procedures and studies. In this work we introduce two visualization techniques based on DT-MRI streamlining able to decipher interesting properties of the architectural organization of the heart. |
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Place of Publication |
Girona (Spain) |
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Conference |
MICCAT |
| Notes |
IAM |
Approved |
no |
| Call Number |
IAM @ iam @ PGM2010 |
Serial |
1626 |
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| Author |
Sandra Pujades;Francesc Carreras;Manuel Ballester; Jaume Garcia; Debora Gil |
| Title |
A Normalized Parametric Domain for the Analysis of the Left Ventricular Function |
Type |
Conference Article |
| Year |
2008 |
Publication |
Proceedings of the Third International Conference on Computer Vision Theory and Applications (VISAPP’08) |
Abbreviated Journal |
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| Volume |
1 |
Issue |
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Pages |
267-274 |
| Keywords |
Helical Ventricular Myocardial Band; Myocardial Fiber; Tagged Magnetic Resonance; HARP; Optical Flow Variational Framework; Gabor Filters; B-Splines. |
| Abstract |
Impairment of left ventricular (LV) contractility due to cardiovascular diseases is reflected in LV motion patterns. The mechanics of any muscle strongly depends on the spatial orientation of its muscular fibers since the motion that the muscle undergoes mainly takes place along the fiber. The helical ventricular myocardial band (HVMB) concept describes the myocardial muscle as a unique muscular band that twists in space in a non homogeneous fashion. The 3D anisotropy of the ventricular band fibers suggests a regional analysis of the heart motion. Computation of normality models of such motion can help in the detection and localization of any cardiac disorder. In this paper we introduce, for the first time, a normalized parametric domain that allows comparison of the left ventricle motion across patients. We address, both, extraction of the LV motion from Tagged Magnetic Resonance images, as well as, defining a mapping of the LV to a common normalized domain. Extraction of normality motion patterns from 17 healthy volunteers shows the clinical potential of our LV parametrization. |
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| Notes |
IAM; |
Approved |
no |
| Call Number |
IAM @ iam @ GGP2008 |
Serial |
1627 |
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| Author |
Oriol Pujol; Debora Gil; Petia Radeva |
| Title |
Fundamentals of Stop and Go active models |
Type |
Journal Article |
| Year |
2005 |
Publication |
Image and Vision Computing |
Abbreviated Journal |
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| Volume |
23 |
Issue |
8 |
Pages |
681-691 |
| Keywords |
Deformable models; Geodesic snakes; Region-based segmentation |
| Abstract |
An efficient snake formulation should conform to the idea of picking the smoothest curve among all the shapes approximating an object of interest. In current geodesic snakes, the regularizing curvature also affects the convergence stage, hindering the latter at concave regions. In the present work, we make use of characteristic functions to define a novel geodesic formulation that decouples regularity and convergence. This term decoupling endows the snake with higher adaptability to non-convex shapes. Convergence is ensured by splitting the definition of the external force into an attractive vector field and a repulsive one. In our paper, we propose to use likelihood maps as approximation of characteristic functions of object appearance. The better efficiency and accuracy of our decoupled scheme are illustrated in the particular case of feature space-based segmentation. |
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Butterworth-Heinemann |
Place of Publication |
Newton, MA, USA |
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Edition |
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| ISSN |
0262-8856 |
ISBN |
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Medium |
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Conference |
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| Notes |
IAM;MILAB;HuPBA |
Approved |
no |
| Call Number |
IAM @ iam @ PGR2005 |
Serial |
1629 |
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| Author |
Petia Radeva; A.Amini; J.Huang; Enric Marti |
| Title |
Deformable B-Solids and Implicit Snakes for Localization and Tracking of SPAMM MRI-Data |
Type |
Conference Article |
| Year |
1996 |
Publication |
Workshop on Mathematical Methods in Biomedical Image Analysis |
Abbreviated Journal |
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Issue |
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Pages |
192-201 |
| Keywords |
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| Abstract |
To date, MRI-SPAMM data from different image slices have been analyzed independently. In this paper, we propose an approach for 3D tag localization and tracking of SPAMM data by a novel deformable B-solid. The solid is defined in terms of a 3D tensor product B-spline. The isoparametric curves of the B-spline solid have special importance. These are termed implicit snakes as they deform under image forces from tag lines in different image slices. The localization and tracking of tag lines is performed under constraints of continuity and smoothness of the B-solid. The framework unifies the problems of localization, and displacement fitting and interpolation into the same procedure utilizing B-spline bases for interpolation. To track motion from boundaries and restrict image forces to the myocardium, a volumetric model is employed as a pair of coupled endocardial and epicardial B-spline surfaces. To recover deformations in the LV an energy-minimization problem is posed where both tag and ... |
| Address |
San Francisco CA |
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Thesis |
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| Publisher |
IEEE Computer Society |
Place of Publication |
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Series Issue |
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Edition |
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ISBN |
0-8186-7368-0 |
Medium |
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Expedition |
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Conference |
MMBIA ’96 |
| Notes |
MILAB;IAM; |
Approved |
no |
| Call Number |
IAM @ iam @ RAH1996 |
Serial |
1630 |
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