loop closing for Simultaneous Localization and Mapping. Our (2008)
Viorela Ila, Juan Andrade-cetto, Rafael Valencia, Alberto Sanfeliu
Abstract — This paper shows results on outdoor vision-based
(*) Instituto de Cibernética (**)Instituto de Robotica e Informatica Industrial (2008)
Miguel Sainz, Alberto Sanfeliu
Automatic generation of models from a set of positive and negative samples and a-priori knowledge (if available) is a crucial issue for pattern recognition applications. Grammatical inference can...
Action evaluation for mobile robot global localization in cooperative environments (2008)
Corominas Murtra, Andreu, Mirats Tur, Josep M., Sanfeliu, Alberto
12 pages, 12 figures, 1 table.-- Printed version published Oct 31, 2008.-- Issue title: "Network Robot Systems".
Sanfeliu, Alberto, Hagita, Norihiro, Saffiotti, Alessandro
5 pages, 6 figures.-- Printed version published Oct 31, 2008.-- Issue title: "Network Robot Systems".
Editorial [to monographic issue: "Network Robot Systems"] (2008)
Sanfeliu, Alberto, Hagita, Norihiro, Saffiotti, Alessandro
1 page.-- Printed version published Oct 31, 2008.-- Issue title: "Network Robot Systems".
Autonomous Single Camera Exploration (2008)
Teresa Vidal-calleja, Alberto Sanfeliu, Juan Andrade-cetto
Abstract — In this paper we present an active exploration strategy for a mobile robot navigating in 3D. The aim is to control a moving robot that autonomously builds a visual feature map while at...
Dependent multiple cue integration for robust tracking (2008)
Moreno-Noguer, Francesc, Sanfeliu, Alberto, Samaras, Dimitris
16 pages, 13 figures.
Pattern recognition in interdisciplinary perception and intelligence (2008)
Fernández-Caballero, Antonio, Sanfeliu, Alberto, Shirai, Yoshiaki
3 pages.-- Printed version published Jun 1, 2008.-- Editorial to the monographic issue: "Pattern Recognition in Interdisciplinary Perception and Intelligence - PRintPerclntel".
Orientation Invariant Features for Multiclass Object Recognition ⋆ (2008)
Michael Villamizar, Alberto Sanfeliu, Juan Andrade-cetto
Abstract. We present a framework for object recognition based on simple scale and orientation invariant local features that when combined with a hierarchical multiclass boosting mechanism produce...
OUTDOOR DELAYED-STATE VISUALLY AUGMENTED ODOMETRY (2008)
Viorela Ila, Juan Andrade-cetto, Alberto Sanfeliu
Abstract: This paper presents an efficient approach to outdoor visually augmented odometry. The technique computes relative pose constraints via a robust least squares minimisation of 3D point...
Francesc Moreno-noguer, Alberto Sanfeliu
We propose a new technique for fusing multiple cues to robustly segment an object from the background in video sequences that suffer from abrupt changes of both illumination and position of the...
Ubiquitous Networking Robotics in Urban Settings (2008)
Alberto Sanfeliu, Juan Andrade-cetto
the project is the development of new ways of cooperation between network robots and human beings and/or the environment in urban areas. The focus of the project is in urban pedestrian areas, an...
FUNCTION-DESCRIBED GRAPHS: AN IMPROVEMENT ON RANDOM GRAPHS (2008)
Francesc Serratosa, Alberto Sanfeliu, René Alquezar
Function-Described Graphs (FDGs) have been introduced recently as a representation of an ensemble of attributed relational graphs (ARGs) for structural pattern recognition [3]. Whereas the distance...
A Target Dependent Colorspace for Robust Tracking (2008)
Francesc Moreno-noguer, Alberto Sanfeliu
The selection of the appropriate colorspace for tracking applications has not been an issue previously considered in the literature. Many color representations have been suggested, based on the...
Francesc Moreno-noguer, Alberto Sanfeliu
We propose a new technique for fusing multiple cues to robustly segment an object from its background in video sequences that suffer from abrupt changes of both illumination and position of the...
Michael Villamizar, Alberto Sanfeliu, Juan Andrade Cetto
Abstract. In this article, scale and orientation invariant object detection is performed by matching intensity level histograms. Unlike other global measurement methods, the present one uses a local...
Teresa Vidal-calleja, Alberto Sanfeliu, Juan Andrade-cetto
Abstract: In this paper we present a real-time active motion strategy for a mobile robot navigating in a non-flat terrain and its 3D constrained motion model. The aim is to control the robot with...
Corominas Murtra, Andreu, Mirats Tur, Josep M., Sandoval, Óscar, Sanfeliu, Alberto
This paper presents the software being developed at IRI (Institut de Robotica i Informatica Industrial) for mobile robot autonomous navigation in the context of the European project URUS (Ubiquitous...
Sanfeliu, Alberto, Hagita, Norihiro, Saffiotti, Alessandro
Network Robot Systems (NRS) is a new concept that integrates physical autonomous robots, environments sensors and human–robot interaction through network-based cooperation. The history of NRS is...
Sanfeliu, Alberto, Hagita, Norihiro, Saffiotti, Alessandro
This article introduces the definition of Network Robot Systems (NRS) as is understood in Europe, USA and Japan. Moreover, it describes some of the NRS projects in Europe and Japan and presents a...
Pattern recognition in interdisciplinary perception and intelligence (2008)
Fernandez-Caballero, A, Sanfeliu, Alberto, Shirai, Yoshiaki
Introduction of Pattern Recognition in interdisciplinary perception and artificial intelligence
Corominas Murtra, Andreu, Mirats Tur, Josep M., Sanfeliu, Alberto
This paper presents a novel and efficient framework to the active map-based global localization problem for mobile robots operating in large and cooperative environments. The paper proposes a...
Dependent multiple cue integration for robust tracking (2008)
Moreno-Noguer, Francesc, Sanfeliu, Alberto, Samaras, Dimitris
We propose a new technique for fusing multiple cues to robustly segment an object from its background in video sequences that suffer from abrupt changes of both illumination and position of the...
Action evaluation for mobile robot global localization in cooperative environments (2008)
Corominas Murtra, Andreu, Mirats Tur, Josep M., Sanfeliu, Alberto
This work is about solving the global localization issue for mobile robots, operating in large and cooperative environments. It tackles the problem of estimating the pose of a robot, or team of...
Efficient vision-based loop closing techniques for delayed state robot mapping (2008)
Ila, Viorela, Andrade-Cetto, Juan, Sanfeliu, Alberto
This paper shows results on outdoor vision-based loop closing for Simultaneous Localization and Mapping. Our experiments show that for loops of over 50m, the pose estimates maintained with a...
An European vision of network robot systems in urban areas (2008)
Presentation of a vision of Network Robot Systems in Europe
Cooperative issues in network robot systems in urban areas (2008)
Presentation of cooperative topics in Network Robot Systems in the URUS project
Ubiquitous networking robotics in urban sites (URUS) (2008)
Presentation of the European's project "Ubiquitous Networking Robotics in Urban Sites"
URUS: Ubiquitous networking robotics for urban settings (2008)
Presentation of the progress of the European's project URUS: Ubiquitous Networking Robotics for Urban Settings
URUS: Ubiquitous networking robotics for urban settings (2008)
Progress of the European's project "URUS: Ubiquitous Networking Robotics for Urban Settings"
A view of network robot systems in urban areas in Europe (2008)
Presentation of the projects in network robot systems in Europe
Corominas Murtra, Andreu, Mirats Tur, Josep M., Sandoval, Óscar, Sanfeliu, Alberto
This paper presents the software being developed at IRI (Institut de Robotica i Informatica Industrial) for mobile robot autonomous navigation in the context of the European project URUS (Ubiquitous...
Sanfeliu, Alberto, Hagita, Norihiro, Saffiotti, Alessandro
Network Robot Systems (NRS) is a new concept that integrates physical autonomous robots, environments sensors and human–robot interaction through network-based cooperation. The history of NRS is...
Sanfeliu, Alberto, Hagita, Norihiro, Saffiotti, Alessandro
This article introduces the definition of Network Robot Systems (NRS) as is understood in Europe, USA and Japan. Moreover, it describes some of the NRS projects in Europe and Japan and presents a...
Pattern recognition in interdisciplinary perception and intelligence (2008)
Fernandez-Caballero, A, Sanfeliu, Alberto, Shirai, Yoshiaki
Introduction of Pattern Recognition in interdisciplinary perception and artificial intelligence
Corominas Murtra, Andreu, Mirats Tur, Josep M., Sanfeliu, Alberto
This paper presents a novel and efficient framework to the active map-based global localization problem for mobile robots operating in large and cooperative environments. The paper proposes a...
Dependent multiple cue integration for robust tracking (2008)
Moreno-Noguer, Francesc, Sanfeliu, Alberto, Samaras, Dimitris
We propose a new technique for fusing multiple cues to robustly segment an object from its background in video sequences that suffer from abrupt changes of both illumination and position of the...
Action evaluation for mobile robot global localization in cooperative environments (2008)
Corominas Murtra, Andreu, Mirats Tur, Josep M., Sanfeliu, Alberto
This work is about solving the global localization issue for mobile robots, operating in large and cooperative environments. It tackles the problem of estimating the pose of a robot, or team of...
Efficient vision-based loop closing techniques for delayed state robot mapping (2008)
Ila, Viorela, Andrade-Cetto, Juan, Sanfeliu, Alberto
This paper shows results on outdoor vision-based loop closing for Simultaneous Localization and Mapping. Our experiments show that for loops of over 50m, the pose estimates maintained with a...
An European vision of network robot systems in urban areas (2008)
Presentation of a vision of Network Robot Systems in Europe
Cooperative issues in network robot systems in urban areas (2008)
Presentation of cooperative topics in Network Robot Systems in the URUS project
Ubiquitous networking robotics in urban sites (URUS) (2008)
Presentation of the European's project "Ubiquitous Networking Robotics in Urban Sites"
URUS: Ubiquitous networking robotics for urban settings (2008)
Presentation of the progress of the European's project URUS: Ubiquitous Networking Robotics for Urban Settings
URUS: Ubiquitous networking robotics for urban settings (2008)
Progress of the European's project "URUS: Ubiquitous Networking Robotics for Urban Settings"
A view of network robot systems in urban areas in Europe (2008)
Presentation of the projects in network robot systems in Europe
Corominas Murtra, Andreu, Mirats Tur, Josep M., Sandoval, Óscar, Sanfeliu, Alberto
This paper presents the software being developed at IRI (Institut de Robotica i Informatica Industrial) for mobile robot autonomous navigation in the context of the European project URUS (Ubiquitous...
Sanfeliu, Alberto, Hagita, Norihiro, Saffiotti, Alessandro
Network Robot Systems (NRS) is a new concept that integrates physical autonomous robots, environments sensors and human–robot interaction through network-based cooperation. The history of NRS is...
Sanfeliu, Alberto, Hagita, Norihiro, Saffiotti, Alessandro
This article introduces the definition of Network Robot Systems (NRS) as is understood in Europe, USA and Japan. Moreover, it describes some of the NRS projects in Europe and Japan and presents a...
Pattern recognition in interdisciplinary perception and intelligence (2008)
Fernandez-Caballero, A, Sanfeliu, Alberto, Shirai, Yoshiaki
Introduction of Pattern Recognition in interdisciplinary perception and artificial intelligence
Corominas Murtra, Andreu, Mirats Tur, Josep M., Sanfeliu, Alberto
This paper presents a novel and efficient framework to the active map-based global localization problem for mobile robots operating in large and cooperative environments. The paper proposes a...
Dependent multiple cue integration for robust tracking (2008)
Moreno-Noguer, Francesc, Sanfeliu, Alberto, Samaras, Dimitris
We propose a new technique for fusing multiple cues to robustly segment an object from its background in video sequences that suffer from abrupt changes of both illumination and position of the...
Action evaluation for mobile robot global localization in cooperative environments (2008)
Corominas Murtra, Andreu, Mirats Tur, Josep M., Sanfeliu, Alberto
This work is about solving the global localization issue for mobile robots, operating in large and cooperative environments. It tackles the problem of estimating the pose of a robot, or team of...
Efficient vision-based loop closing techniques for delayed state robot mapping (2008)
Ila, Viorela, Andrade-Cetto, Juan, Sanfeliu, Alberto
This paper shows results on outdoor vision-based loop closing for Simultaneous Localization and Mapping. Our experiments show that for loops of over 50m, the pose estimates maintained with a...
An European vision of network robot systems in urban areas (2008)
Presentation of a vision of Network Robot Systems in Europe
Cooperative issues in network robot systems in urban areas (2008)
Presentation of cooperative topics in Network Robot Systems in the URUS project
Ubiquitous networking robotics in urban sites (URUS) (2008)
Presentation of the European's project "Ubiquitous Networking Robotics in Urban Sites"
URUS: Ubiquitous networking robotics for urban settings (2008)
Presentation of the progress of the European's project URUS: Ubiquitous Networking Robotics for Urban Settings
URUS: Ubiquitous networking robotics for urban settings (2008)
Progress of the European's project "URUS: Ubiquitous Networking Robotics for Urban Settings"
A view of network robot systems in urban areas in Europe (2008)
Presentation of the projects in network robot systems in Europe
Alberto Sanfeliu And, Alberto Sanfeliu
. Recently, Augmented Regular Expressions (AREs) have been proposed as a formalism to describe, recognize and learn a nontrivial class of context-sensitive languages (CSLs) [1, 2]. AREs augment the...
René Alquézar, Alberto Sanfeliu, Miguel Sainz
In this paper, the ability of recurrent neural networks (RNNs) for regular inference (RI) from positive and negative examples is investigated. As in some previous works [1, 2], RNNs were trained to...
Francesc Moreno-noguer, Alberto Sanfeliu
In this paper we propose a new technique to perform figure-ground segmentation in image sequences of moving objects under varying illumination conditions. Unlike most of the algorithms that adapt...
Moreno-Noguer, Francesc, Sanfeliu, Alberto, Samaras, Dimitris
12 pages, 11 figures, 1 table.-- Available online Apr 17, 2006.-- Issue title: "Articulated and Non-rigid motion".
A new algorithm to compute the distance between multi-dimensional histograms (2007)
Serratosa, Francesc, Sanroma, G., Sanfeliu, Alberto
The aim of this paper is to present a new algorithm to compute the distance between ndimensional histograms. There are some domains such as pattern recognition or image retrieval that use the...
Robust color contour object detection invariant to shadows (2007)
Scandaliaris, Jorge, Villamizar, Michael, Andrade-Cetto, Juan, Sanfeliu, Alberto
In this work a new robust color and contour based object detection method in images with varying shadows is presented. The method relies on a physics-based contour detector that emphasizes material...
Villamizar, Michael, Sanfeliu, Alberto, Andrade-Cetto, Juan
In this article, scale and orientation invariant object detection is performed by matching intensity level histograms. Unlike other global measurement methods, the present one uses a local feature...
Moreno-Noguer, Francesc, Sanfeliu, Alberto, Samaras, Dimitris
In this paper we propose a new technique to perform figure-ground segmentation in image sequences of moving objects under varying illumination conditions. Unlike most of the algorithms that adapt...
Outdoor delayed-state visually augmented odometry (2007)
Ila, Viorela, Andrade-Cetto, Juan, Sanfeliu, Alberto
This paper presents an efficient approach to outdoor visually augmented odometry. The technique computes relative pose constraints via a robust least squares minimisation of 3D point correspondences,...
Vidal-Calleja, Teresa, Sanfeliu, Alberto, Andrade-Cetto, Juan
In this paper we present a real-time active motion strategy for a mobile robot navigating in a non-flat terrain and its 3D constrained motion model. The aim is to control the robot with measurements...
Vision-based loop closing for delayed state robot mapping (2007)
Ila, Viorela, Andrade-Cetto, Juan, Valencia, Rafael, Sanfeliu, Alberto
This paper shows results on outdoor vision-based loop closing for Simultaneous Localization and Mapping. Our experiments show that for loops of over 50m, the pose estimates maintained with a...
On the observability of bearing only SLAM (2007)
Vidal-Calleja, Teresa, Bryson, Mitch, Sukkarieh, Salah, Sanfeliu, Alberto, Andrade-Cetto, Juan
In this paper we present an observability analysis for a mobile robot performing SLAM with a single monocular camera. The aim is to get a better understanding of the well known intuitive behavior of...
Visual Navigation in Unknown Environments (2007)
Juan Andrade Cetto, Alberto Sanfeliu
Navigation in mobile robotics involves two tasks, keeping track of the robot’s position and moving according to a control strategy. In addition, when no prior knowledge of the environment is...
A new algorithm to compute the distance between multi-dimensional histograms (2007)
Serratosa, Francesc, Sanroma, G., Sanfeliu, Alberto
The aim of this paper is to present a new algorithm to compute the distance between ndimensional histograms. There are some domains such as pattern recognition or image retrieval that use the...
Robust color contour object detection invariant to shadows (2007)
Scandaliaris, Jorge, Villamizar, Michael, Andrade-Cetto, Juan, Sanfeliu, Alberto
In this work a new robust color and contour based object detection method in images with varying shadows is presented. The method relies on a physics-based contour detector that emphasizes material...
Villamizar, Michael, Sanfeliu, Alberto, Andrade-Cetto, Juan
In this article, scale and orientation invariant object detection is performed by matching intensity level histograms. Unlike other global measurement methods, the present one uses a local feature...
Moreno-Noguer, Francesc, Sanfeliu, Alberto, Samaras, Dimitris
In this paper we propose a new technique to perform figure-ground segmentation in image sequences of moving objects under varying illumination conditions. Unlike most of the algorithms that adapt...
Outdoor delayed-state visually augmented odometry (2007)
Ila, Viorela, Andrade-Cetto, Juan, Sanfeliu, Alberto
This paper presents an efficient approach to outdoor visually augmented odometry. The technique computes relative pose constraints via a robust least squares minimisation of 3D point correspondences,...
Vidal-Calleja, Teresa, Sanfeliu, Alberto, Andrade-Cetto, Juan
In this paper we present a real-time active motion strategy for a mobile robot navigating in a non-flat terrain and its 3D constrained motion model. The aim is to control the robot with measurements...
Vision-based loop closing for delayed state robot mapping (2007)
Ila, Viorela, Andrade-Cetto, Juan, Valencia, Rafael, Sanfeliu, Alberto
This paper shows results on outdoor vision-based loop closing for Simultaneous Localization and Mapping. Our experiments show that for loops of over 50m, the pose estimates maintained with a...
On the observability of bearing only SLAM (2007)
Vidal-Calleja, Teresa, Bryson, Mitch, Sukkarieh, Salah, Sanfeliu, Alberto, Andrade-Cetto, Juan
In this paper we present an observability analysis for a mobile robot performing SLAM with a single monocular camera. The aim is to get a better understanding of the well known intuitive behavior of...
A new algorithm to compute the distance between multi-dimensional histograms (2007)
Serratosa, Francesc, Sanroma, G., Sanfeliu, Alberto
The aim of this paper is to present a new algorithm to compute the distance between ndimensional histograms. There are some domains such as pattern recognition or image retrieval that use the...
Robust color contour object detection invariant to shadows (2007)
Scandaliaris, Jorge, Villamizar, Michael, Andrade-Cetto, Juan, Sanfeliu, Alberto
In this work a new robust color and contour based object detection method in images with varying shadows is presented. The method relies on a physics-based contour detector that emphasizes material...
Villamizar, Michael, Sanfeliu, Alberto, Andrade-Cetto, Juan
In this article, scale and orientation invariant object detection is performed by matching intensity level histograms. Unlike other global measurement methods, the present one uses a local feature...
Moreno-Noguer, Francesc, Sanfeliu, Alberto, Samaras, Dimitris
In this paper we propose a new technique to perform figure-ground segmentation in image sequences of moving objects under varying illumination conditions. Unlike most of the algorithms that adapt...
Outdoor delayed-state visually augmented odometry (2007)
Ila, Viorela, Andrade-Cetto, Juan, Sanfeliu, Alberto
This paper presents an efficient approach to outdoor visually augmented odometry. The technique computes relative pose constraints via a robust least squares minimisation of 3D point correspondences,...
Vidal-Calleja, Teresa, Sanfeliu, Alberto, Andrade-Cetto, Juan
In this paper we present a real-time active motion strategy for a mobile robot navigating in a non-flat terrain and its 3D constrained motion model. The aim is to control the robot with measurements...
Vision-based loop closing for delayed state robot mapping (2007)
Ila, Viorela, Andrade-Cetto, Juan, Valencia, Rafael, Sanfeliu, Alberto
This paper shows results on outdoor vision-based loop closing for Simultaneous Localization and Mapping. Our experiments show that for loops of over 50m, the pose estimates maintained with a...
On the observability of bearing only SLAM (2007)
Vidal-Calleja, Teresa, Bryson, Mitch, Sukkarieh, Salah, Sanfeliu, Alberto, Andrade-Cetto, Juan
In this paper we present an observability analysis for a mobile robot performing SLAM with a single monocular camera. The aim is to get a better understanding of the well known intuitive behavior of...
Michael Villamizar, Alberto Sanfeliu, Juan Andrade-cetto
We present a framework for object detection that is invariant to object translation, scale, rotation, and to some degree, occlusion, achieving high detection rates, at 14 fps in color images and at...
Unscented transformation of vehicle states in SLAM (2005)
Juan Andrade-cetto, Teresa Vidal-calleja, Alberto Sanfeliu
Abstract — In this article we propose an algorithm to reduce the effects caused by linearization in the typical EKF approach to SLAM. The technique consists in computing the vehicle prior using an...
Multi-robot C-SLAM: Simultaneous localization, control and mapping (2005)
Juan Andrade-cetto, Teresa Vidal-calleja, Alberto Sanfeliu
This paper is about closing the low level control loop during Multirobot Simultaneous Localization and Map Building from an estimation-control theoretic viewpoint. We present a multi-vehicle control...
Juan Andrade-cetto, Alberto Sanfeliu, Cutting Edge Robotics
The study of stochastic models for Simultaneous Localization and Map Building (SLAM) in mobile robotics has been an active research topic for over fifteen years. Within the Kalman filter (KF)...
Estimator Stability Analysis In SLAM (2004)
Teresa Vidal-Calleja, Juan Abdrade-Cetto, Alberto Sanfeliu
This work presents an analysis of the state estimation error dynamics for a linear system within the Kalman filter based approach to Simultaneous Localization and Map Building. Our objective is to...
Conditions for suboptimal filter stability in SLAM (2004)
Teresa Vidal-calleja, Juan Andrade-cetto, Alberto Sanfeliu
Abstract — In this article, we show marginal stability in SLAM, guaranteeing convergence to a non-zero mean state error estimate bounded by a constant value. Moreover, marginal stability guarantees...
Fusion of Color and Shape for Object Tracking under Varying Illumination (2003)
Francesc Moreno-noguer, Juan Andrade-cetto, Alberto Sanfeliu
Abstract. In this paper a new technique to perform tracking in cluttered scenarios with varying illumination conditions is presented. The robustness of the approach lies in the integration of...
Temporal Landmark Validation in CML (2003)
Juan Andrade-Cetto, Alberto Sanfeliu
Current techniques to concurrent map building and localization (CML) have been devised for static environments, and lack robustness in more realistic situations. In this communication we provide new...
Concurrent map building and localization on indoor dynamic environments (2002)
Juan Andrade-cetto, Alberto Sanfeliu
A system that builds and maintains a dynamic map for a mobile robot is presented. A learning rule associated to each observed landmark is used to compute its robustness. The position of the robot...
3d real-time head tracking fusing color histograms and stereovision (2002)
Francesc Moreno, Adrià Tarrida, Juan Andrade-cetto, Alberto Sanfeliu
A system that performs the tracking of a human head in 3D in real time is presented. The head shape is modeled by an ellipse with a trained color histogram of skin and hair samples. The color...
Concurrent map building and localization with landmark validation (2002)
Juan Andrade-cetto, Alberto Sanfeliu
This communication addresses the issue of concurrent map building and localization (CML) for a mobile robot in an unknown environment. The proposed solution extends over previous contributions in...
3d real-time head tracking fusing color histograms and stereovision (2002)
Francesc Moreno, Adrià Tarrida, Juan Andrade-cetto, Alberto Sanfeliu
A system that performs the tracking of a human head in 3D in real time is presented. The head shape is modeled by an ellipse with a trained color histogram of skin and hair samples. The color...
Localization of human faces fusing color segmentation and depth from stereo (2001)
Francesc Moreno, Juan Andrade-cetto, Alberto Sanfeliu
Abstract—This paper describes a method to localize faces in color images based on the fusion of the information gathered from a stereo vision system and the analysis of color images. Our method...
Learning of dynamic environments by a mobile robot from stereo cues (2001)
Juan Andrade-cetto, Alberto Sanfeliu
A system that builds a three-dimensional map of an indoor environment for a mobile robot is presented. The approach uses visual features extracted from stereo images as landmarks. A learning rule...
Localization of human faces fusing color segmentation and depth from stereo (2001)
Francesc Moreno, Juan Andrade-cetto, Alberto Sanfeliu
Abstract—This paper describes a method to localize faces in color images based on the fusion of the information gathered from a stereo vision system and the analysis of color images. Our method...
Sanfeliu.A, Integration of perceptual grouping and depth (2000)
Juan Andrade-cetto, Alberto Sanfeliu
Different data acquisition methods are tailored at extracting particular characteristics from a scene and by combining their results a more robust scene description can be created. A method to fuse...
Efficient Algorithms for Matching Attributed Graphs and Function-Described Graphs (2000)
Francesc Serratosa, Rene Alquzar, Alberto Sanfeliu
Function-Described Graphs (FDGs) have been introduced by the authors as a representation of an ensemble of Attributed Graphs (AGs) for structural pattern recognition alternative to first-order random...
Clustering of Attributed Graphs and Unsupervised Synthesis of Function-Described Graphs (2000)
Alberto Sanfeliu, Francesc Serratosa, Ren Alquzar
Function-Described Graphs (FDGs) have been introduced by the authors as a representation of an ensemble of Attributed Graphs (AGs) for structural pattern recognition alternative to first-order random...
Synthesis of Function-Described Graphs (1998)
Rene Alquezar, Alberto Sanfeliu, Francesc Serratosa
. Function-described graphs (FDGs) have been introduced very recently as a representation of an ensemble of attributed relational graphs (ARGs) for structural pattern recognition [1, 2]. In this...
Rene Alquezar, Alberto Sanfeliu, Miguel Sainz
In this paper, the ability of recurrent neural networks (RNNs) for regular inference (RI) from positive and negative examples is investigated. As in some previous works [1, 2], RNNs were trained to...
René Alquézar, Alberto Sanfeliu, Alberto Sanfeliu
. In this paper, a new formalism that permits to represent a non-trivial class of context-sensitive languages, the Augmented Regular Expressions (AREs), is introduced. AREs augment the expressive...
Learning of Context-Sensitive Languages Described by Augmented Regular Expressions (1996)
René Alquézar, Alberto Sanfeliu
Recently, Augmented Regular Expressions (AREs) have been proposed as a formalism to describe and recognize a non-trivial class of context-sensitive languages (CSLs) [1, 2]. AREs augment the...
René Alquézar, Alberto Sanfeliu, Jordi Cueva
. Recently, Augmented Regular Expressions (AREs) have been proposed as a formalism to describe and recognize a non-trivial class of context-sensitive languages (CSLs), that covers planar shapes with...
Miguel Sainz, Alberto Sanfeliu
A system to learn and recognize traffic signs is described. The system uses neural network image processing and syntactic methods. The learning process is based on the representation of traffic signs...
Rene Alquezar, Alberto Sanfeliu
In order to extend the potential of application of the syntactic approach to pattern recognition, the efficient use of models capable of describing context-sensitive structural relationships is...