Exploració per autor "Gonzàlez, Jordi"
Ara es mostren els items 9-28 de 29
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Chromatic shadow detection and tracking for moving foreground segmentation
Huerta Casado, Iván; Holte, Michael B.; Moeslund, Thomas; Gonzàlez, Jordi (2015)
Article
Accés obertAdvanced segmentation techniques in the surveillance domain deal with shadows to avoid distortions when detecting moving objects. Most approaches for shadow detection are still typically restricted to penumbra shadows and ... -
Component-based human detection
Chakraborty, Bhaskar; Rius, Ignasi; Perdersoli, Marco; Mozerov, Mikhail; Gonzàlez, Jordi (s. n., 2007)
Text en actes de congrés
Accés obertIn this paper, we present a general framework for human detection in a video sequence by components. The technique is demonstrated by developing a system that locates people in the cluttered scenes where they are performing ... -
Computationally efficient graph matching via energy vector extraction
Amato, Ariel; Al, Murad; Lladós, Josep; Gonzàlez, Jordi (Springer, 2007)
Text en actes de congrés
Accés obertThis paper presents a method for graph matching based on domain knowledge by quantifying representative graph features. Our method searches and extracts the most relevant cues in different graphs. Once these cues are ... -
Constructing a path database for scene categorization
Baiget, Pau; Fernández, Carles; Amato, Ariel; Roca, Francesc Xavier; Gonzàlez, Jordi (s. n., 2007)
Text en actes de congrés
Accés obertHuman behavior understanding in image sequences requires to study human interaction with the environment, because human beings behave depending on their location. Therefore, a semantic labeling of the scenario must be ... -
Deterministic and stochastic methods for gaze tracking in real-time
Orozco, Francisco J.; Roca, Francesc Xavier; Gonzàlez, Jordi (Springer, 2007)
Capítol de llibre
Accés obertPsychological evidence demonstrates how eye gaze analysis is requested for human computer interaction endowed with emotion recognition capabilities. The existing proposals analyse eyelid and iris motion by using colour ... -
Enhancing real-time human detection based on histograms of oriented gradients
Perdersoli, Marco; Gonzàlez, Jordi; Chakraborty, Bhaskar; Villanueva, Juan J. (Springer, 2007)
Capítol de llibre
Accés obertIn this paper we propose a human detection framework based on an enhanced version of Histogram of Oriented Gradients (HOG) features. These feature descriptors are computed with the help of a precalculated histogram of ... -
Face detection in color images using primitive shape features
Al, Murad; Amato, Ariel; Roca, Francesc Xavier; Gonzàlez, Jordi (Springer, 2007)
Capítol de llibre
Accés obertFace detection is a primary step in many applications such as face recognition, video surveillance, human computer interface, and expression recognition. Many existing detection techniques suffer under scale variation, ... -
Finding faces in color images through primitive shape features
Al, Murad; Orozco, Francisco J.; Amato, Ariel; Roca, Francesc Xavier; Gonzàlez, Jordi (s. n., 2007)
Text en actes de congrés
Accés obertFace detection is a primary step in many applications such as face recognition, video surveillance, human computer interface, and expression recognition. Many existing detection techniques suffer under scale variation, ... -
HERMES: A research project on human sequence evaluation
Gonzàlez, Jordi; Roca, Francesc Xavier; Villanueva, Juan J. (Taylor and Francis, 2007)
Text en actes de congrés
Accés obertHuman Sequence Evaluation concentrates on how to extract descriptions of human behaviour from videos in a restricted discourse domain, such as (i) pedestrians crossing inner-city roads where pedestrians appear approaching ... -
Hierarchical eyelid and face tracking
Orozco, Francisco J.; Gonzàlez, Jordi; Rius, Ignasi; Roca, Francesc Xavier (Springer Verlag, 2007)
Capítol de llibre
Accés obertMost applications on Human Computer Interaction (HCI) require to extract the movements of user faces, while avoiding high memory and time expenses. Moreover, HCI systems usually use low-cost cameras, while current face ... -
High-level integration for cognitive vision surveillance
Fernández, Carles; Baiget, Pau; Roca, Francesc Xavier; Gonzàlez, Jordi (s. n., 2007)
Text en actes de congrés
Accés obertThe increasing interest in Cognitive Vision Systems (CVS) motivates the apparition of ad-hoc stages designed for the integration of multiple kinds of knowledge. This paper proposes a novel ontology to restrict and integrate ... -
Improving background subtraction based on a casuistry of colour-motion segmentation problems
Huerta Casado, Iván; Rowe, Daniel; Mozerov, Mikhail; Gonzàlez, Jordi (Springer Verlag, 2007)
Capítol de llibre
Accés obertThe basis for the high-level interpretation of observed patterns of human motion still relies on motion segmentation. Popular approaches based on background subtraction use colour information to model each pixel during a ... -
Natural language descriptions of human behaviour from video sequences
Fernández, Carles; Baiget, Pau; Roca, Francesc Xavier; Gonzàlez, Jordi (Springer, 2007)
Capítol de llibre
Accés obertThis contribution addresses the generation of textual descriptions in several natural languages for evaluation of human behavior in video sequences. The problem is tackled by converting geometrical information extracted ... -
On reasoning over tracking events
Rowe, Daniel; Gonzàlez, Jordi; Huerta Casado, Iván; Villanueva, Juan J. (Springer, 2007)
Capítol de llibre
Accés obertHigh-level understanding of motion events is a critical task in any system which aims to analyse dynamic human-populated scenes. However, current tracking techniques still do not address complex interaction events among ... -
On-line one stroke character recognition using directional features
Al, Murad; Amato, Ariel; Sánchez, Gemma; Gonzàlez, Jordi (Springer, 2007)
Text en actes de congrés
Accés obertThis paper presents a method based on directional features for recognizing on-line characters represented by one-stroke. A new alphabet is proposed, and each character is represented as a vector of directional angles. This ... -
Ontology for semantic integration in a cognitive surveillance system
Fernández, Carles; Gonzàlez, Jordi (Springer, 2007)
Capítol de llibre
Accés obertThe increasing interest in Cognitive Vision Systems (CVS) motivates the apparition of ad-hoc stages designed for the integration of multiple kinds of knowledge. This paper proposes a novel ontology to restrict and integrate ... -
Robust multiple-people tracking using color-based particle filters
Rowe, Daniel; Huerta Casado, Iván; Gonzàlez, Jordi; Villanueva, Juan J. (Springer Verlag, 2007)
Capítol de llibre
Accés obertRobust and accurate people tracking is a key task in many promising computer-vision applications. One must deal with non-rigid targets in open-world scenarios, whose shape and appearance evolve over time. Targets may ... -
Semantic annotation of complex human scenes for multimedia surveillance
Fernández, Carles; Baiget, Pau; Roca, Francesc Xavier; Gonzàlez, Jordi (Springer, 2007)
Capítol de llibre
Accés obertA Multimedia Surveillance System (MSS) is considered for automatically retrieving semantic content from complex outdoor scenes, involving both human behavior and traffic domains. To characterize the dynamic information ... -
Spatio-temporal reasoning for reliable facial expression interpretation
Orozco, Francisco J.; García, Fabio A.; Arcos, Lluis; Gonzàlez, Jordi (Bielefeld University, 2007)
Text en actes de congrés
Accés obertUnderstanding human behaviours and emotions has received contributions from image analysis and pattern recognition techniques in order to tackle this challenge. The most popular facial expression classifiers deal with ... -
Top-down model fitting for hand pose recovery in sequences of depth images
Madadi, Meysam; Escalera, Sergio; Carruesco Llorens, Àlex; Andújar Gran, Carlos Antonio; Baró, Xavier; Gonzàlez, Jordi (2018-11)
Article
Accés obertState-of-the-art approaches on hand pose estimation from depth images have reported promising results under quite controlled considerations. In this paper we propose a two-step pipeline for recovering the hand pose from a ...