607 research outputs found
An adaptive probabilistic model for straight edge-extraction within a multilevel MRF framework
No full textStatistical approaches to ill-posed image processing problems such as restoration, segmentation and edge-detection have been proposed previously that were based on Markov random fields (MRFs). MRFs provide a regularization framework where a-priori knowledge expressed in a probabilistic way can be used together with available data for obtaining solutions characterized by a "good" global behaviour. A-priori knowledge and evidential knowledge can be used to specify constraints on the solution within a probabilistic functional. Observation models are necessary to capture evidential knowledge, i.e., the relations between the solution and data acquired either by a physical or a logical device. The present paper is based on a multilevel MRF approach introduced in Regazzoni (1994) and Regazzoni and Venetsanopoulos aiming at three different tasks: 1) to detect straight lines, 2) to restore the original image, and 3) to detect edge points. In particular, a new line detection approach is introduced, consisting in a progressive relaxation of the threshold used to establish the line presence in an appropriate parameter space. The method is applied to SAR remote sensing
Il problema della penale «irrisoria» nella prospettiva delle clausole di esonero da responsabilità
No full textIl commento esamina criticamente gli orientamenti in merito al sindacato giudiziale sulle clausole penali di ammontare «irrisorio», individuandone il fondamento (anche in esito ad un confronto con l’ordinamento francese) in un’applicazione diretta alla clausola penale dell’art. 1229 c.c., qualora l’importo pattuito risulti notevolmente inferiore all’entità del danno prevedibile. Si analizzano inoltre gli effetti che la previsione di nullità ex art. 1229 può sortire in questa fattispecie, con lo scopo di salvaguardare le utilità derivanti dalla penale in favore del creditore.The author critically examines the various theses about the judicial review of an «extremely modest» penalty clause. After a comparison with the French legal system, the author argues that such review is allowed by the direct application of Art. 1229 of the Civil Code to the penalty clause, where the agreed amount is significantly lower than the foreseeable damage. Furthermore, an analysis is drawn of the effects that the provision of nullity under Art. 1229 may have in such a case, with the aim of maintaining the benefits granted by the penalty to the creditor
Eveline G. Bouwers, Public Pantheons in Revolutionary Europe. Comparing Cultures of Remembrance, c. 1790–1840. (War, Culture and Society, 1750–1850.) Basingstoke/New York, Palgrave Macmillan 2012
No full textRegazzoni L. Eveline G. Bouwers, Public Pantheons in Revolutionary Europe. Comparing Cultures of Remembrance, c. 1790–1840. (War, Culture and Society, 1750–1850.) Basingstoke/New York, Palgrave Macmillan 2012. Historische Zeitschrift. 2014;298(3):813-814
Einleitung
No full textTrümpler C, Blume J, Hierholzer V, Regazzoni L. Einleitung. In: Trümpler C, Blume J, Hierholzer V, Regazzoni L, eds. „Ich sehe wunderbare Dinge“: 100 Jahre Sammlungen der Goethe-Universität. Ostfildern: Hatje Cantz; 2014: 12–15
CB e l’impaziente inventario del mondo. Intervista con Christian Boltanski
No full textRegazzoni L, Boltanski C. CB e l’impaziente inventario del mondo. Intervista con Christian Boltanski. Regazzoni L, tran.;
Alberto Gerchunoff. Una sinagoga nella pampa
No full textRecensione di Gerchunoff, A. (2024). Una sinagoga nella pampa. A cura di C. Cattarulla. Roma: Nova Delphi, 175 pp
Multimedia communication techniques for remote cable-based video-surveillance systems
No full texthis paper aims at presenting a study of costs and performance concerning different multimedia communication techniques that can be employed in the context of the implementation of 2/sup nd/ generation remote video-surveillance systems using wired cable TV networks as a communication means. The multimedia information is acquired by video sensors and transmitted through the CATV network to a remote control centre, where a PC-based image processing architecture performs the image processing tasks needed by the implementation of the foreseen system functionalities. The paper will show some possible analogue and digital solutions to the problems concerning the real-time multimedia data transmission in generic cable-based AVS applications. Laboratory simulations of multimedia data transmission over upstream noisy channels have been performed in order to test the performance in terms of quality of the received images provided by the most advanced high-speed commercial cable modem systems
A Distributed Surveillance System for Detection of Abandoned Objects in Unmanned Railway Environments
No full textAdaptive tracking of multiple non rigid objects in cluttered scenes
No full textTracking of non-rigid objects (e.g. humans) is a crucial application for understanding the behavior of objects. Different methods have been presented in literature, whose main drawback is low robustness or high computational load in analysis of cluttered scenes. In the paper a low computational algorithm for tracking non-rigid objects in cluttered scenes is presented. The proposed approach models the shape of the objects by using corners. A learning algorithm is introduced in order to automatically extract the model of the object from a short video sequence acquired immediately before merging of more objects in the scene. The adaptive model extraction mechanism strongly improves method robustness. The method is tested on an existing video-surveillance system in order to track moving objects in cluttered scenes. Results show that the proposed approach gives good performances with low-processing times
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