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Displaying 1-50 out of 64 total
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 ...
 
Class-Based Color Bag of Words for Fashion Retrieval
Found in: 2012 IEEE International Conference on Multimedia and Expo (ICME)
By Costantino Grana,Daniele Borghesani,Rita Cucchiara
Issue Date:July 2012
pp. 444-449
Color signatures, histograms and bag of colors are basic and effective strategies for describing the color content of images, for retrieving images by their color appearance or providing color annotation. In some domains, colors assume a specific meaning f...
 
A multi-stage pedestrian detection using monolithic classifiers
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Giovanni Gualdi,Andrea Prati,Rita Cucchiara
Issue Date:September 2011
pp. 267-272
Despite the many efforts in finding effective feature sets or accurate classifiers for people detection, few works have addressed ways for reducing the computational burden introduced by the sliding window paradigm. This paper proposes a multi-stage proced...
 
Fast Background Initialization with Recursive Hadamard Transform
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Davide Baltieri, Roberto Vezzani, Rita Cucchiara
Issue Date:September 2010
pp. 165-171
In this paper, we present a new and fast techniquefor background estimation from cluttered image sequences.Most of the background initialization approaches developedso far collect a number of initial frames and then requirea slow estimation step which intr...
 
Decision Trees for Fast Thinning Algorithms
Found in: Pattern Recognition, International Conference on
By Costantino Grana, Daniele Borghesani, Rita Cucchiara
Issue Date:August 2010
pp. 2836-2839
We propose a new efficient approach for neighborhood exploration, optimized with decision tables and decision trees, suitable for local algorithms in image processing. In this work, it is employed to speed up two widely used thinning techniques. The perfor...
 
Alignment-Based Similarity of People Trajectories Using Semi-directional Statistics
Found in: Pattern Recognition, International Conference on
By Simone Calderara, Andrea Prati, Rita Cucchiara
Issue Date:August 2010
pp. 4275-4278
This paper presents a method for comparing people trajectories for video surveillance applications, based on semi-directional statistics. In fact, the modelling of a trajectory as a sequence of angles, speeds and time lags, requires the use of a statistica...
 
High Performance Connected Components Labeling on FPGA
Found in: Database and Expert Systems Applications, International Workshop on
By Costantino Grana, Daniele Borghesani, Paolo Santinelli, Rita Cucchiara
Issue Date:September 2010
pp. 221-225
This paper proposes a comparison of the two most advanced algorithms for connected components labeling, highlighting how they perform on a soft core SoC architecture based on FPGA. In particular we test our block based connected components labeling algorit...
 
Learning People Trajectories Using Semi-directional Statistics
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Simone Calderara, Andrea Prati, Rita Cucchiara
Issue Date:September 2009
pp. 213-218
This paper proposes a system for people trajectory shape analysis by exploiting a statistical approach which accounts for sequences of both directional (the directions of the trajectory) and linear (the speeds) data. A semi-directional distribution (AWLG -...
 
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>
 
Pervasive Self-Learning with Multi-modal Distributed Sensors
Found in: Self-Adaptive and Self-Organizing Systems Workshops, IEEE International Conference on
By Nicola Bicocchi, Marco Mamei, Andrea Prati, Rita Cucchiara, Franco Zambonelli
Issue Date:October 2008
pp. 61-66
Truly ubiquitous computing poses new and significantchallenges. One of the key aspects that will condition theimpact of these new tecnologies is how to obtain a manageablerepresentation of the surrounding environment startingfrom simple sensing capabilitie...
 
Action Signature: A Novel Holistic Representation for Action Recognition
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Simone Calderara, Rita Cucchiara, Andrea Prati
Issue Date:September 2008
pp. 121-128
Recognizing different actions with a unique approach can be a difficult task. This paper proposes a novel holistic representation of actions that we called
 
Annotation Collection and Online Performance Evaluation for Video Surveillance: The ViSOR Project
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Roberto Vezzani, Rita Cucchiara
Issue Date:September 2008
pp. 227-234
This paper presents the Visor (VIdeo Surveillance Online Repository) project designed with the aim of establishing an open platform for collecting, annotating, retrieving, sharing surveillance videos, and of evaluating the performance of automatic surveill...
 
Using circular statistics for trajectory shape analysis
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Andrea Prati, Simone Calderara, Rita Cucchiara
Issue Date:June 2008
pp. 1-8
The analysis of patterns of movement is a crucial task for several surveillance applications, for instance to classify normal or abnormal people trajectories on the basis of their occurrence. This paper proposes to model the shape of a single trajectory as...
 
An Open Source Architecture for Low-Latency Video Streaming on PDAs
Found in: Multimedia, International Symposium on
By Giovanni Gualdi, Andrea Prati, Rita Cucchiara
Issue Date:December 2007
pp. 302-309
This paper presents a open-source system for low-latency video streaming on PDAs, specifically addressing mobile video surveillance requirements. The system is based on H.264 and suitably modified to obtain the best trade-off between image quality and vide...
 
Bayesian-Competitive Consistent Labeling for People Surveillance
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Simone Calderara, Rita Cucchiara, Andrea Prati
Issue Date:February 2008
pp. 354-360
This paper presents a novel and robust approach to consistent labeling for people surveillance in multi-camera systems. A general framework scalable to any number of cameras with overlapped views is devised. An off-line training process automatically compu...
 
A Dynamic Programming Technique for Classifying Trajectories
Found in: Image Analysis and Processing, International Conference on
By Simone Calderara, Rita Cucchiara, Andrea Prati
Issue Date:September 2007
pp. 137-142
This paper proposes the exploitation of a dynamic programming technique for efficiently comparing people trajectories adopting an encoding scheme that jointly takes into account both the direction and the velocity of movement. With this approach, each pair...
 
Efficient Stereo Vision for Obstacle Detection and AGV Navigation
Found in: Image Analysis and Processing, International Conference on
By Rita Cucchiara, Emanuele Perini, Giuliano Pistoni
Issue Date:September 2007
pp. 291-296
The paper presents the design and implementation of a system of autonomous navigation of a mobile robot with stereo vision.
 
Detection of abnormal behaviors using a mixture of Von Mises distributions
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Simone Calderara, Rita Cucchiara, Andrea Prati
Issue Date:September 2007
pp. 141-146
This paper proposes the use of a mixture of Von Mises distributions to detect abnormal behaviors of moving people. The mixture is created from an unsupervised training set by exploiting k-medoids clustering algorithm based on Bhattacharyya distance between...
 
Video Shots Comparison using the Mallows Distance
Found in: Database and Expert Systems Applications, International Workshop on
By Constantino Grana, Daniele Borghesani, Rita Cucchiara
Issue Date:September 2007
pp. 49-53
In this work, we focus on two aspects of the comparison of video shots. We present a new approach to extract a variable number of key frames from a shot, by the use of a hierarchical clustering with automatic level selection, in order to provide optimal al...
 
Low-Latency Live Video Streaming over Low-Capacity Networks
Found in: Multimedia, International Symposium on
By Giovanni Gualdi, Rita Cucchiara, Andrea Prati
Issue Date:December 2006
pp. 449-456
This paper presents an effective system for streaming over low-capacity networks (such as GPRS and EGPRS) of live videos with low latency. Existing solutions are either too complex or not suitable to our scope. For this reason, we developed a complete, rea...
 
A Semi-Automatic Video Annotation tool with MPEG-7 Content Collections
Found in: Multimedia, International Symposium on
By Roberto Vezzani, Costantino Grana, Daniele Bulgarelli, Rita Cucchiara
Issue Date:December 2006
pp. 742-745
In this work, we present a general purpose system for hierarchical structural segmentation and automatic annotation of video clips, by means of standardized low level features. We propose to automatically extract some prototypes for each class with a conte...
 
Group Detection at Camera Handoff for Collecting People Appearance in Multi-camera Systems
Found in: Advanced Video and Signal Based Surveillance, IEEE Conference on
By Simone Calderara, Rita Cucchiara, Andrea Prati
Issue Date:November 2006
pp. 36
Logging information on moving objects is crucial in video surveillance systems. Distributed multi-camera systems can provide the appearance of objects/people from different viewpoints and at different resolutions, allowing a more complete and precise loggi...
 
Line Detection and Texture Characterization of Network Patterns
Found in: Pattern Recognition, International Conference on
By Costantino Grana, Rita Cucchiara, Giovanni Pellacani, Stefania Seidenari
Issue Date:August 2006
pp. 275-278
This paper describes a complete approach to detect, localize and describe network patterns. Such texture is automatically detected with Gaussian derivative kernels and Fisher linear discriminant analysis; line closure and thinning is provided by morphologi...
 
Fast Dynamic Mosaicing and Person Following
Found in: Pattern Recognition, International Conference on
By Andrea Prati, Fabrizio Seghedoni, Rita Cucchiara
Issue Date:August 2006
pp. 920-923
A system for video surveillance purposes in wide areas based on active cameras, also capable to follow a person in the scene by keeping him framed, is presented. The proposed approach is based on the so-called direction histograms to compute the ego-motion...
 
Estimating Geospatial Trajectory of a Moving Camera
Found in: Pattern Recognition, International Conference on
By Asaad Hakeem, Roberto Vezzani, Mubarak Shah, Rita Cucchiara
Issue Date:August 2006
pp. 82-87
This paper proposes a novel method for estimating the geospatial trajectory of a moving camera. The proposed method uses a set of reference images with known GPS (global positioning system) locations to recover the trajectory of a moving camera using geome...
 
On the usefulness of object shape coding with MPEG-4
Found in: Multimedia, International Symposium on
By Andrea Prati, Rita Cucchiara
Issue Date:December 2005
pp. 483-490
This paper reports the results of an in-depth analysis of the degree of usefulness of object shape coding in video compression. In particular, MPEG-4 is used as reference standard. The influence of different coding parameters on the performance is deeply e...
 
MPEG-7 Compliant Shot Detection in Sport Videos
Found in: Multimedia, International Symposium on
By Costantino Grana, Giovanni Tardini, Rita Cucchiara
Issue Date:December 2005
pp. 395-402
In this paper we propose a system for automatic detection of shots in sport videos. Our work covers two main aspects: the first is robust shot detection in presence of fast object motion and camera operations. To this aim we propose a new algorithm, unique...
 
Assessing Temporal Coherence for Posture Classification with Large Occlusions
Found in: Applications of Computer Vision and the IEEE Workshop on Motion and Video Computing, IEEE Workshop on
By Rita Cucchiara, Roberto Vezzani
Issue Date:January 2005
pp. 269-274
In this paper we present a people posture classification approach especially devoted to cope with occlusions. In particular, the approach aims at assessing temporal coherence of visual data over probabilistic models. A mixed predictive and probabilistic tr...
 
Detecting Moving Objects, Ghosts, and Shadows in Video Streams
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Rita Cucchiara, Costantino Grana, Massimo Piccardi, Andrea Prati
Issue Date:October 2003
pp. 1337-1342
<p><b>Abstract</b>—Background subtraction methods are widely exploited for moving object detection in videos in many applications, such as traffic monitoring, human motion capture, and video surveillance. How to correctly and efficiently ...
 
Detecting Moving Shadows: Algorithms and Evaluation
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Andrea Prati, Ivana Mikic, Mohan M. Trivedi, Rita Cucchiara
Issue Date:July 2003
pp. 918-923
<p><b>Abstract</b>—Moving shadows need careful consideration in the development of robust dynamic scene analysis systems. Moving shadow detection is critical for accurate object detection in video streams since shadow points are often mis...
 
Improvement in Range Segmentation Parameters Tuning
Found in: Pattern Recognition, International Conference on
By Luigi Cinque, Fabrizio Corzani, Stefano Levialdi, Rita Cucchiara, Gianluca Pignalberi
Issue Date:August 2002
pp. 10176
<p>A great effort has been done during last years to improve range image segmentation results. The efficacy of the algorithms is affected by the parameters tuning.</p> <p>In this work two well-known search techniques have been applied to ...
 
Analysis and Detection of Shadows in Video Streams: A Comparative Evaluation
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Andrea Prati, Rita Cucchiara, Ivana Mikic, Mohan M. Trivedi
Issue Date:December 2001
pp. 571
Robustness to changes in illumination conditions as well as viewing perspectives is an important requirement for many computer vision applications. One of the key factors in enhancing the robustness of dynamic scene analysis is that of accurate and reliabl...
 
Optimal Range Segmentation Parameters through Genetic Algorithms
Found in: Pattern Recognition, International Conference on
By Luigi Cinque, Stefano Levialdi, Gianluca Pignalberi, Rita Cucchiara, Stefano Martinz
Issue Date:September 2000
pp. 1474
A wide number of algorithms for surface segmentation in range images have been recently proposed characterized by different approaches (edge filling, region growing.), different surface types (either for planar or curved surfaces) and different parameters ...
 
Exploiting Cache in Multimedia
Found in: Multimedia Computing and Systems, International Conference on
By Rita Cucchiara, Andrea Prati, Massimo Piccardi
Issue Date:June 1999
pp. 9345
The paper explores cache strategies for multimedia. Although many architectural improvements have been designed for multimedia, the cache structure and the standard caching policies of general-purpose processors exhibit poor performance in exploiting the 2...
 
The Vector-Gradient Hough Transform
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Rita Cucchiara, Fabio Filicori
Issue Date:July 1998
pp. 746-750
<p><b>Abstract</b>—The paper presents a new transform, called <it>Vector-Gradient Hough Transform</it>, for identifying elongated shapes in gray-scale images. This goal is achieved not only by collecting information on the edg...
 
Visual Tracking: An Experimental Survey
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Arnold W. M. Smeulders,Dung M. Chu,Rita Cucchiara,Simone Calderara,Afshin Dehghan,Mubarak Shah
Issue Date:July 2014
pp. 1-1
There is a large variety of trackers, which have been proposed in the literature during the last two decades with some mixed success. Object tracking in realistic scenarios is a difficult problem, therefore, it remains a most active area of research in com...
   
Sensing floors for privacy-compliant surveillance of wide areas
Found in: 2013 10th IEEE International Conference on Advanced Video and Signal Based Surveillance (AVSS)
By Martino Lombardi,Augusto Pieracci,Paolo Santinelli,Roberto Vezzani,Rita Cucchiara
Issue Date:August 2013
pp. 105-110
Surveillance systems can really benefit from the integration of multiple and heterogeneous sensors. In this paper we describe an innovative sensing floor. Thanks to its low cost and ease of installation, the floor is suitable for both private and public en...
   
Structured learning for detection of social groups in crowd
Found in: 2013 10th IEEE International Conference on Advanced Video and Signal Based Surveillance (AVSS)
By Francesco Solera,Simone Calderara,Rita Cucchiara
Issue Date:August 2013
pp. 7-12
Group detection in crowds will play a key role in future behavior analysis surveillance systems. In this work we build a new Structural SVM-based learning framework able to solve the group detection task by exploiting annotated video data to deduce a socio...
   
A people counting system for business analytics
Found in: 2013 10th IEEE International Conference on Advanced Video and Signal Based Surveillance (AVSS)
By Carlo Pane,Marco Gasparini,Andrea Prati,Giovanni Gualdi,Rita Cucchiara
Issue Date:August 2013
pp. 135-140
This paper deals with people counting in stores for business analytics using stereo vision. Among the several problems in this type of applications, two are the most relevant for our purposes: the management of occlusions and the distinction between adult ...
   
Predictive and Probabilistic Tracking to Detect Stopped Vehicles
Found in: Applications of Computer Vision and the IEEE Workshop on Motion and Video Computing, IEEE Workshop on
By Rudy Melli, Andrea Prati, Rita Cucchiara, Lieven de Cock
Issue Date:January 2005
pp. 388-393
Many techniques and models have been proposed for verhicles surveillance in highways. In the past, tracking algorithms based on Kalman filter have been largely used for their efficiency in the prediction and low computational cost. However, predictive filt...
 
Object Segmentation in Videos from Moving Camera with MRFs on Color and Motion Features
Found in: Computer Vision and Pattern Recognition, IEEE Computer Society Conference on
By Rita Cucchiara, Andrea Prati, Roberto Vezzani
Issue Date:June 2003
pp. 405
In this paper we address the problem of fast segmenting moving objects in video acquired by moving camera or more generally with a moving background. We present an approach based on a color segmentation followed by a region-merging on motion through Markov...
 
People reidentification in surveillance and forensics: A survey
Found in: ACM Computing Surveys (CSUR)
By Davide Baltieri, Rita Cucchiara, Roberto Vezzani
Issue Date:November 2013
pp. 1-37
The field of surveillance and forensics research is currently shifting focus and is now showing an ever increasing interest in the task of people reidentification. This is the task of assigning the same identifier to all instances of a particular individua...
     
Modeling local descriptors with multivariate gaussians for object and scene recognition
Found in: Proceedings of the 21st ACM international conference on Multimedia (MM '13)
By Rita Cucchiara, Costantino Grana, Giuseppe Serra, Marco Manfredi
Issue Date:October 2013
pp. 709-712
Common techniques represent images by quantizing local descriptors and summarizing their distribution in a histogram. In this paper we propose to employ a parametric description and compare its capabilities to histogram based approaches. We use the multiva...
     
Learning articulated body models for people re-identification
Found in: Proceedings of the 21st ACM international conference on Multimedia (MM '13)
By Roberto Vezzani, Davide Baltieri, Rita Cucchiara
Issue Date:October 2013
pp. 557-560
People re-identification is a challenging problem in surveillance and forensics and it aims at associating multiple instances of the same person which have been acquired from different points of view and after a temporal gap. Image-based appearance feature...
     
Hand segmentation for gesture recognition in EGO-vision
Found in: Proceedings of the 3rd ACM international workshop on Interactive multimedia on mobile & portable devices (IMMPD '13)
By Giuseppe Serra, Lorenzo Baraldi, Marco Camurri, Michela Benedetti, Rita Cucchiara
Issue Date:October 2013
pp. 31-36
Portable devices for first-person camera views will play a central role in future interactive systems. One necessary step for feasible human-computer guided activities is gesture recognition, preceded by a reliable hand segmentation from egocentric vision....
     
Video surveillance online repository (ViSOR): www.openvisor.org
Found in: Proceedings of the 4th ACM Multimedia Systems Conference (MMSys '13)
By Rita Cucchiara, Roberto Vezzani
Issue Date:February 2013
pp. 90-95
This paper describe the ViSOR (Video Surveillance Online Repository) repository, designed with the aim of establishing an open platform for collecting, annotating, retrieving, and sharing surveillance videos, as well as evaluating the performance of automa...
     
3DPeS: 3D people dataset for surveillance and forensics
Found in: Proceedings of the 2011 joint ACM workshop on Human gesture and behavior understanding (J-HGBU '11)
By Davide Baltieri, Rita Cucchiara, Roberto Vezzani
Issue Date:December 2011
pp. 59-64
The interest of the research community in creating reference datasets for performance analysis is always very high. Although new datasets, collecting large amounts of video footage are spreading in surveillance and forensics, few bench-marks with annotatio...
     
Joint ACM workshop on human gesture and behavior understanding: (J-HGBU'11)
Found in: Proceedings of the 19th ACM international conference on Multimedia (MM '11)
By Alberto Del Bimbo, Alessandro Vinciarelli, Alex Pentland, Maja Pantic, Mohamed Daoudi, Rita Cucchiara
Issue Date:November 2011
pp. 615-616
The ability to understand social signals of a person we are communicating with is the core of social intelligence. Social Intelligence is a facet of human intelligence that has been argued to be indispensable and perhaps the most important for success in l...
     
When multimedia meets surveillance and forensics in people security
Found in: Proceedings of the 2nd ACM workshop on Multimedia in forensics, security and intelligence (MiFor '10)
By Rita Cucchiara
Issue Date:October 2010
pp. 49-50
When new disciplines emerge, and their commercial applications arise, the market invents new terms and definitions. This is the case of new fields related to surveillance and forensics for people security, which are adopting multimedia, computer vision, co...
     
A videosurveillance data browsing software architecture for forensics: from trajectories similarities to video fragments
Found in: Proceedings of the 2nd ACM workshop on Multimedia in forensics, security and intelligence (MiFor '10)
By Manuel Aravecchia, Rita Cucchiara, Sara Chiossi, Simone Calderara
Issue Date:October 2010
pp. 37-42
The information contained in digital video surveillance repositories can present relevant hints, when not even legal evidence, during investigations. As the amount of video data often forbids manual search, some tools have been developed during the past ye...
     
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