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Displaying 1-50 out of 78 total
Matching Trajectories between Video Sequences by Exploiting a Sparse Projective Invariant Representation
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Walter Nunziati, Stan Sclaroff, Alberto Del Bimbo
Issue Date:March 2010
pp. 517-529
Identifying correspondences between trajectory segments observed from nonsynchronized cameras is important for reconstruction of the complete trajectory of moving targets in a large scene. Such a reconstruction can be obtained from motion data by comparing...
 
Metric 3D Reconstruction and Texture Acquisition of Surfaces of Revolution from a Single Uncalibrated View
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Carlo Colombo, Alberto Del Bimbo, Federico Pernici
Issue Date:January 2005
pp. 99-114
Image analysis and computer vision can be effectively employed to recover the three-dimensional structure of imaged objects, together with their surface properties. In this paper, we address the problem of metric reconstruction and texture acquisition from...
 
3D Face Recognition Using Isogeodesic Stripes
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Stefano Berretti, Alberto Del Bimbo, Pietro Pala
Issue Date:December 2010
pp. 2162-2177
In this paper, we present a novel approach to 3D face matching that shows high effectiveness in distinguishing facial differences between distinct individuals from differences induced by nonneutral expressions within the same individual. The approach takes...
 
Symbolic Description and Visual Querying of Image Sequences Using Spatio-Temporal Logic
Found in: IEEE Transactions on Knowledge and Data Engineering
By Alberto Del Bimbo, Enrico Vicario, Daniele Zingoni
Issue Date:August 1995
pp. 609-622
<p><it>Abstract</it>—The emergence of advanced multimedia applications is emphasizing the relevance of retrieval by contents within databases of images and image sequences. Matching the inherent visuality of the information stored in such...
 
Guest Editors' Introduction to the Special Section on Syntactic and Structural Pattern Recognition
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Mitra Basu, Horst Bunke, Alberto Del Bimbo
Issue Date:July 2005
pp. 1009-1012
No summary available.
 
Guest Editor's Introduction: Multimedia Computing and Systems
Found in: IEEE Multimedia
By Alberto Del Bimbo
Issue Date:January 2000
pp. 18-21
No summary available.
 
3D Navigation of Geographic Data Sets
Found in: IEEE Multimedia
By Ricardo Camiciottoli, Jacopo M. Corridoni, Alberto Del Bimbo, Enrico Vicario, Dario Lucarella
Issue Date:April 1998
pp. 29-41
Supervision and control of wide area transportation networks requires continuous monitoring of large data sets. Two factors complicate the process: data items are spread over a wide geographic area, but are reciprocally influenced through network links, an...
 
Object Tracking by Oversampling Local Features
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Federico Pernici,Alberto Del Bimbo
Issue Date:December 2014
pp. 1-1
In this paper, we present the ALIEN tracking method that exploits oversampling of local invariant representations to build a robust object/context discriminative classifier. To this end, we use multiple instances of scale invariant local features weakly al...
 
Posterity Logging of Face Imagery for Video Surveillance
Found in: IEEE MultiMedia
By Andrew D. Bagdanov,Alberto Del Bimbo,Fabrizio Dini,Giuseppe Lisanti,Iacopo Masi
Issue Date:October 2012
pp. 48-59
A real-time posterity logging system detects and tracks multiple targets in video streams, grabbing face images and retaining only the best quality for each detected target.
 
Continuous recovery for real time pan tilt zoom localization and mapping
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Alberto Del Bimbo,Giuseppe Lisanti,Iacopo Masi,Federico Pernici
Issue Date:September 2011
pp. 160-165
We propose a method for real time recovering from tracking failure in monocular localization and mapping with a Pan Tilt Zoom camera (PTZ). The method automatically detects and seamlessly recovers from tracking failure while preserving map integrity. By ex...
 
Three-Dimensional Interfaces for Querying by Example in Content-Based Image Retrieval
Found in: IEEE Transactions on Visualization and Computer Graphics
By Jürgen Assfalg, Alberto Del Bimbo, Pietro Pala
Issue Date:October 2002
pp. 305-318
<p><b>Abstract</b>—Image databases are nowadays widely exploited in a number of different contexts, ranging from history of art, through medicine, to education. Existing querying paradigms are based either on the usage of textual strings,...
 
Visual Image Retrieval by Elastic Matching of User Sketches
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Alberto Del Bimbo, Pietro Pala
Issue Date:February 1997
pp. 121-132
<p><b>Abstract</b>—Effective image retrieval by content from database requires that visual image properties are used instead of textual labels to properly index and recover pictorial data. Retrieval by shape similarity, given a user-sketc...
 
Semantic annotation and retrieval of video events using multimedia ontologies
Found in: International Conference on Semantic Computing
By Andrew D. Bagdanov, Marco Bertini, Alberto Del Bimbo, Giuseppe Serra, Carlo Torniai
Issue Date:September 2007
pp. 713-720
Effective usage of multimedia digital libraries has to deal with the problem of building efficient content annotation and retrieval tools. In this paper Multimedia Ontologies, that include both linguistic and dynamic visual ontologies, are presented and th...
 
Specification by-Example of Virtual Agents Behavior
Found in: IEEE Transactions on Visualization and Computer Graphics
By Alberto Del Bimbo, Enrico Vicario
Issue Date:December 1995
pp. 350-360
<p><it>Abstract</it>—The development of virtual agents running within graphic environments which emulate real-life contexts may largely benefit from the use of visual specification by-example. To support this specification, the developmen...
 
Visions for Augmented Cultural Heritage Experience
Found in: IEEE MultiMedia
By Rita Cucchiara,Alberto Del Bimbo
Issue Date:January 2014
pp. 74-82
Museum visitor experiences differ from person to person, from cognitive to affective experiences. Progress in information technology has provided us with the opportunity to improve both the quantity and personalization of cultural information, privileging ...
 
The Mesh-LBP: Computing Local Binary Patterns on Discrete Manifolds
Found in: 2013 IEEE International Conference on Computer Vision Workshops (ICCVW)
By Naoufel Werghi,Stefano Berretti,Alberto Del Bimbo,Pietro Pala
Issue Date:December 2013
pp. 562-569
In this paper, we present a novel and original framework for computing Local Binary Pattern (LBP)-like patterns on a triangular mesh manifold. This framework, dubbed mesh-LBP can be adapted to all the LBP variants employed in 2D image analysis. As such, it...
 
RFID-based Solutions for User Profiling in Interactive Exhibits
Found in: Multimedia, International Symposium on
By Gianpaolo D'Amico,Alberto Del Bimbo,Andrea Ferracani,Lea Landucci,Daniele Pezzatini,Luca Santi
Issue Date:December 2011
pp. 216-221
In this paper we present a work-in-progress interactive exhibit for the museum of Onna, a little town near to L'Aquila (Italy), almost completely destroyed by the earthquake of April 2009. The installation will be developed as an environment in which visit...
 
Adaptive Video Compression for Video Surveillance Applications
Found in: Multimedia, International Symposium on
By Andrew D. Bagdanov,Marco Bertini,Alberto Del Bimbo,Lorenzo Seidenari
Issue Date:December 2011
pp. 190-197
This article describes an approach to adaptive video coding for video surveillance applications. Using a combination of low-level features with low computational cost, we show how it is possible to control the quality of video compression so that semantica...
 
Sensor Fusion for Cooperative Head Localization
Found in: Pattern Recognition, International Conference on
By Alberto Del Bimbo, Fabrizio Dini, Giuseppe Lisanti, Federico Pernici
Issue Date:August 2010
pp. 384-387
In modern video surveillance systems, pan–tilt– zoom (PTZ) cameras certainly have the potential to allow the coverage of wide areas with a much smaller number of sensors, compared to the common approach of fixed camera networks. This paper describes a gene...
 
Person Detection Using Temporal and Geometric Context with a Pan Tilt Zoom Camera
Found in: Pattern Recognition, International Conference on
By Alberto Del Bimbo, Giuseppe Lisanti, Iacopo Masi, Federico Pernici
Issue Date:August 2010
pp. 3886-3889
In this paper we present a system that integrates automatic camera geometry estimation and object detection from a Pan Tilt Zoom camera. We estimate camera pose with respect to a world scene plane in real-time and perform human detection exploiting the rel...
 
A Set of Selected SIFT Features for 3D Facial Expression Recognition
Found in: Pattern Recognition, International Conference on
By Stefano Berretti, Alberto Del Bimbo, Pietro Pala, Boulbaba Ben Amor, Mohamed Daoudi
Issue Date:August 2010
pp. 4125-4128
In this paper, the problem of person-independent facial expression recognition is addressed on 3D shapes. To this end, an original approach is proposed that computes SIFT descriptors on a set of facial landmarks of depth images, and then selects the subset...
 
Dynamic Pictorially Enriched Ontologies for Digital Video Libraries
Found in: IEEE Multimedia
By Marco Bertini, Alberto Del Bimbo, Giuseppe Serra, Carlo Torniai, Rita Cucchiara, Costantino Grana, Roberto Vezzani
Issue Date:April 2009
pp. 42-51
<p>This article presents a framework for automatic semantic annotation of video streams with an ontology that includes concepts expressed using linguistic terms and visual data.</p>
 
Action Categorization in Soccer Videos Using String Kernels
Found in: Content-Based Multimedia Indexing, International Workshop on
By Lamberto Ballan, Marco Bertini, Alberto Del Bimbo, Giuseppe Serra
Issue Date:June 2009
pp. 13-18
Action recognition is a crucial task to provide high-level semantic description of the video content, particularly in the case of sports videos. The bag-of-words (BoW) approach has proven to be successful for the categorization of objects and scenes in ima...
 
SHREC'08 entry: 3D face recognition using integral shape information
Found in: Shape Modeling and Applications, International Conference on
By Stefano Berretti, Alberto Del Bimbo, Pietro Pala
Issue Date:June 2008
pp. 255-256
In this work, we shortly describe an original 3D face recognition approach and its performance as resulted from the 3D Shape Retrieval Contest of 3D Face Scans organized by SHREC 2008 with the support of the Network of Excellence AIM@SHAPE. In particular, ...
   
Adaptive uncertainty estimation for particle filter-based trackers
Found in: Image Analysis and Processing, International Conference on
By Andrew D. Bagdanov, Alberto Del Bimbo, Fabrizio Dini, Walter Nunziati
Issue Date:September 2007
pp. 331-336
In particle filter.based visual trackers, dynamic velocity components are typically incorporated into the state update equations. In these cases, there is a risk that the uncertainty in the model update stage can become amplified in unexpected and undesira...
 
Robust Iris Localization and Tracking based on Constrained Visual Fitting
Found in: Image Analysis and Processing, International Conference on
By Carlo Colombo, Dario Comanducci, Alberto Del Bimbo
Issue Date:September 2007
pp. 454-460
A robust iris localization and tracking algorithm based on computer vision is presented. The iris localization algorithm acts as a bootstrap for the tracking algorithm, providing it with a set of multiple hypotheses to restart from in the case of a trackin...
 
Accurate self-calibration of two cameras by observations of a moving person on a ground plane
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Tsuhan Chen, Alberto Del Bimbo, Federico Pernici, Giuseppe Serra
Issue Date:September 2007
pp. 129-134
A calibration algorithm of two cameras using observations of a moving person is presented. Similar methods have been proposed for self-calibration with a single camera, but internal parameter estimation is only limited to the focal length. Recently it has ...
 
Improving the robustness of particle filter-based visual trackers using online parameter adaptation
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Andrew D. Bagdanov, Alberto Del Bimbo, Fabrizio Dini, Walter Nunziati
Issue Date:September 2007
pp. 218-223
In particle filter-based visual trackers, dynamic velocity components are typically incorporated into the state update equations. In these cases, there is a risk that the uncertainty in the model update stage can become amplified in unexpected and undesira...
 
Learning Foveal Sensing Strategies in Unconstrained Surveillance Environments
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Andrew D. Bagdanov, Alberto Del Bimbo, Walter Nunziati, Federico Pernici
Issue Date:November 2006
pp. 40
In this paper we report on techniques for automatically learning foveal sensing strategies for an active pan-tiltzoom camera. The approach uses reinforcement learning to discover foveal actions maximizing the performance of visual detectors, that are in tu...
 
Modeling Spatial Relationships between 3D Objects
Found in: Pattern Recognition, International Conference on
By Stefano Berretti, Alberto Del Bimbo
Issue Date:August 2006
pp. 119-122
In this paper, we propose an original modeling technique which enables quantitative non-symbolic representation and comparison of the mutual spatial positioning of extended entities in a 3D space. The representation accounts for the overall distribution of...
 
Object-Based Image Retrieval Using Active Nets
Found in: Pattern Recognition, International Conference on
By David Garcya-Perez, Antonio Mosquera, Stefano Berretti, Alberto Del Bimbo
Issue Date:August 2006
pp. 750-753
In this work, extraction of relevant objects from images and their matching for retrieval is proposed. Objects are represented by using a two dimensional deformable structure referred to as active net, capable to adapt to relevant image regions according t...
 
Multi-User Natural Interaction System based on Real-Time Hand Tracking and Gesture Recognition
Found in: Pattern Recognition, International Conference on
By Alberto Del Bimbo, Lea Landucci, Alessandro Valli
Issue Date:August 2006
pp. 55-58
We present a Computer Vision based system that enables multiple people to interact naturally with a large display table using their own bare-hand gestures. The display presents and supports a particular multimedia application that can be used at the same t...
 
wikiTable: finger driven interaction for collaborative knowledge-building workspaces
Found in: Computer Vision and Pattern Recognition Workshop
By Stefano Baraldi, Alberto Del Bimbo, Lea Landucci, Alessandro Valli
Issue Date:June 2006
pp. 144
We present an interactive workspace featuring visionbased gesture recognition that allows multiple users to collaborate in the creation of a concept map. The workspace integrates web-based and face-to-face scenarios in knowledge-building activities like br...
 
Natural Interfaces to Enhance Visitors' Experiences
Found in: IEEE Multimedia
By Thomas M. Alisi, Alberto Del Bimbo, Alessandro Valli
Issue Date:July 2005
pp. 80-85
The authors present a multimedia system that really works in a cultural public space. Indeed, if you go to Florence and visit the museum of Palazzo Medici Riccardi, you might see a queue of worldwide tourists waiting for their turn to play with a digital v...
 
Spin Images for Retrieval of 3D Objects by Local and Global Similarity
Found in: Pattern Recognition, International Conference on
By Jürgen Assfalg, Alberto Del Bimbo, Pietro Pala
Issue Date:August 2004
pp. 906-909
The ever increasing availability of 3D models demands for tools supporting their effective and efficient management. Among these tools, those enabling content-based retrieval play a key role.<div></div> In this paper we present a novel approach...
 
Motion Capture Based on Color Error Maps in a Distributed Collaborative Environment
Found in: Pattern Recognition, International Conference on
By Thomas M. Alisi, Alberto Del Bimbo, Fabio Pucci, Alessandro Valli
Issue Date:August 2004
pp. 953-956
In this paper a composite framework for collaborative working is presented. The framework includes real-time motion tracking based on computer vision from standard webcams situated at different locations, data transmission and real-time animation of 3D ava...
 
Accurate Automatic Localization of Surfaces of Revolution for Self-Calibration and Metric Reconstruction
Found in: Computer Vision and Pattern Recognition Workshop
By Carlo Colombo, Dario Comanducci, Alberto Del Bimbo, Federico Pernici
Issue Date:July 2004
pp. 55
In this paper, we address the problem of the automatic metric reconstruction Surface of Revolution (SOR) from a single uncalibrated view. The apparent contour and the visible portions of the imaged SOR cross sections are extracted and classified. The harmo...
 
Retrieval of 3D Objects Using Curvature Maps and Weighted Walkthroughs
Found in: Image Analysis and Processing, International Conference on
By Jürgen Assfalg, Alberto Del Bimbo, Pietro Pala
Issue Date:September 2003
pp. 348
<p>In the field of content-based retrieval of multimedia documents, 3D models have recently gained increasing attention for a number of reasons: advancements in 3D hardware and software technologies, their ever decreasing prices and increasing availa...
 
Uncalibrated 3 metric reconstruction and flattened texture acquisition from a single view of a surface of revolution
Found in: 3D Data Processing Visualization and Transmission, International Symposium on
By Carlo Colombo, Alberto Del Bimbo, Federico Pernici
Issue Date:June 2002
pp. 277
We describe a geometric approach for reconstructing 3D textured graphical models of surface of revolution (SOR) objects from a single uncalibrated view. Our approach is based on the fact that, for the object class of interest, the structure of the scene pr...
 
Real-Time Tracking and Reproduction of 3D Human Body Motion
Found in: Image Analysis and Processing, International Conference on
By Carlo Colombo, Alberto Del Bimbo, Alessandro Valli
Issue Date:September 2001
pp. 0108
Abstract: Non intrusive human body tracking is a key issue in advanced human-computer interaction, with applications ranging from virtual reality to videoconference and telepresence. This paper describes a system for vision-based tracking of body posture. ...
 
Semantics in Visual Information Retrieval
Found in: IEEE Multimedia
By Carlo Colombo, Alberto Del Bimbo, Pietro Pala
Issue Date:July 1999
pp. 38-53
A compositional approach increases the level of representation that can be automatically extracted and used in a visual information retrieval system. Visual information at the perceptual level is aggregated according to a set of rules. These rules reflect ...
 
Image Retrieval by Elastic Matching of Shapes and Image Patterns
Found in: Multimedia Computing and Systems, International Conference on
By Alberto Del Bimbo, Pietro Pala, Simone Santini
Issue Date:June 1996
pp. 0215
In this paper we present a system for interactive image database retrieval, based on elastic template matching. The template can be both a 1D template modeling the contour of an object, and a 2D template modeling a part of an image with a significant grey ...
 
Video Annotation and Retrieval Using Ontologies and Rule Learning
Found in: IEEE Multimedia
By Lamberto Ballan, Marco Bertini, Alberto Del Bimbo, Giuseppe Serra
Issue Date:October 2010
pp. 80-88
<p>An approach for automatic annotation and retrieval of video content uses semantic concept classifiers and ontologies to permit expanded queries to synonyms and concept specializations.</p>
 
Querying and Retrieving Pictorial Data Using Semantics Induced by Colour Quality and Arrangement
Found in: Multimedia Computing and Systems, International Conference on
By Jacopo M. Corridoni, Alberto del Bimbo, Silvio de Magistris
Issue Date:June 1996
pp. 0219
In this paper a novel approach is featured to querying painting databases on the basis of the semantics implied by the use artists make of colours. A symbolic query language, called ``colour description language'' has been designed to express high--level c...
 
Visual Programming of Virtual Worlds Animation
Found in: IEEE Multimedia
By Alberto Del Bimbo, Enrico Vicario
Issue Date:March 1996
pp. 40-49
<p>In virtual reality interfaces, realistic animation of virtual agents enhances human-computer interaction by supporting direct engagement in the virtual environment. Visual programming by example allows designers to define animation rules by
 
Information theoretic sensor management for multi-target tracking with a single pan-tilt-zoom camera
Found in: 2014 IEEE Winter Conference on Applications of Computer Vision (WACV)
By Pietro Salvagnini,Federico Pernici,Marco Cristani,Giuseppe Lisanti,Iacopo Masi,Alberto Del Bimbo,Vittorio Murino
Issue Date:March 2014
pp. 893-900
Automatic multiple target tracking with pan-tilt-zoom (PTZ) cameras is a hard task, with few approaches in the literature, most of them proposing simplistic scenarios. In this paper, we present a PTZ camera management framework which lies on information th...
   
Flarty: recommending art routes using check-ins latent topics
Found in: Proceedings of the 21st ACM international conference on Multimedia (MM '13)
By Alberto Del Bimbo, Andrea Ferracani, Daniele Pezzatini
Issue Date:October 2013
pp. 457-458
In this demo we present Flarty, a mobile location-based social network for the dynamic construction and recommendation of art routes in the city of Florence, Italy, via item based similarity algorithms, places topic extraction and user interest modeling. T...
     
euTV: a system for media monitoring and publishing
Found in: Proceedings of the 21st ACM international conference on Multimedia (MM '13)
By George Ioannidis, Hugo Meinedo, Isabel Trancoso, Alberto Del Bimbo, Emile Bijk, Marco Bertini
Issue Date:October 2013
pp. 453-454
In this paper, we describe the euTV system, which provides a flexible approach to collect, manage, annotate and publish collections of images, videos and textual documents. The system is based on a Service Oriented Architecture that allows to combine and o...
     
A novel framework for collaborative video recommendation, interest discovery and friendship suggestion based on semantic profiling
Found in: Proceedings of the 21st ACM international conference on Multimedia (MM '13)
By Andrea Ferracani, Marco Bertini, Alberto Del Bimbo, Daniele Maddaluno, Daniele Pezzatini, Francesco Gelli
Issue Date:October 2013
pp. 451-452
Two important challenges for social networks are the creation of targeted and personalized content for their users, selecting the most interesting material from the huge amount of user-generated content, and keeping user engagement , e.g. through creation ...
     
Socially-aware video recommendation using users' profiles and crowdsourced annotations
Found in: Proceedings of the 2nd international workshop on Socially-aware multimedia (SAM '13)
By Alberto Del Bimbo, Andrea Ferracani, Daniele Maddaluno, Daniele Pezzatini, Francesco Gelli, Marco Bertini
Issue Date:October 2013
pp. 13-18
The recent explosive growth in the use of social networks has raised the question of how to meet the emerging demand for services that address the interests of the users. In this paper we show how considering homophily in social networks can improve video ...
     
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