Search results for " Images"
showing 10 items of 202 documents
PHOTOGRAMMETRY NOW AND THEN - FROM HAND-CRAFTED TO DEEP-LEARNING TIE POINTS
2022
Abstract. Historical images provide a valuable source of information exploited by several kinds of applications, such as the monitoring of cities and territories, the reconstruction of destroyed buildings, and are increasingly being shared for cultural promotion projects through virtual reality or augmented reality applications. Finding reliable and accurate matches between historical and present images is a fundamental step for such tasks since they require to co-register the present 3D scene with the past one. Classical image matching solutions are sensitive to strong radiometric variations within the images, which are particularly relevant in these multi-temporal contexts due to differen…
Methods and Techniques for Multi-source Data Analysis and Fusion
This work has been inspired by the recent trend in remote sensing and environmental data acquisition. Remote sensing techniques allow us to measure information about an object without touching it. In the last decades remote sensing via satellites has been used in various applications such as Earth observation, weather and storm predictive analysis, atmospheric monitoring, climate change, human-environment interactions. Sensors on airborne and satellite platforms have been recording signals from space for many years, giving rise to a huge amount of data. Some data are processed on-board but others are treated and post-processed in ground stations. Signal and image processing are widely appli…
Exponential Entropy Driven HUM on Knee MR Images
2007
A very important artifact corrupting Magnetic Resonance Images is the RF inhomogeneity. This kind of artifact generates variations of illumination which trouble both direct examination by the doctor and segmentation algorithms. Even if homomorphic filtering approaches have been presented in literature, none of them has developed a measure to determine the cut-off frequency. In this work we present a measure based on information theory with a large experimental setup aimed to demonstrate the validity of our approach.
Deep Metric Learning for Histopathological Image Classification
2022
Neural networks demonstrated to be effective in multiple classification tasks with performances that are similar to human capabilities. Notwithstanding, the viability of the application of this kind of tool in real cases passes through the possibility to interpret the provided results and let the human operator take his decision according to the information that is provided. This aspect is much more evident when the field of application is bound to people's health as for biomed-ical image classification. We propose for the classification of histopathological images a convolutional neural network that, through metric learning, learns a representation that gathers in homogeneous clusters the …
La Sicilia negli Orsi di Dino Buzzati e Lorenzo Mattotti
2022
Nella fiaba illustrata di Dino Buzzati La famosa invasione degli orsi in Sicilia (1945) e nella sua trasposizione filmica ad opera di Lorenzo Mattotti (2019) l’ambientazione siciliana è determinante. In entrambi i casi la Sicilia è un’isola con un grande vulcano – trasfigurata in un ambiente fantastico o riscritta secondo alcuni stereotipi – che i due autori utilizzano con accezioni diverse nella costituzione dell’ecosistema delle loro narrazioni. Soltanto attraverso una comparazione tra le due opere sarà possibile distinguere la rappresentazione delle due Sicilie che vengono raccontate con un intervallo di circa settanta anni. Se non si considera la storia degli Orsi soltanto una fiaba per…
The Challenge of Cave Art. On the Future of Visual Culture
2016
Does it make sense to consider cave art—the art of an ancient past—a challenge for vi- sual culture as an academic discipline and as a research field? It might seem an oxymoron, or rather a boutade, a paradox. Yet there are many reasons to believe that this dive into the past in the age of new media, of digital literacy, can show us a way to the future of our discipline and that it can give us new energy for research. It certainly helps us to answer some fundamental questions that contemporary visual culture has faced in recent years—mostly in connection with its stepmother, traditional art history—if only because cave art studies inevitably shifts the research focus from the issue of Art t…
Premessa a: Cultura visuale in Italia : immagini, sguardi, dispositivi
2022
Questo volume raccoglie le riflessioni maturate durante il convegno internazionale “Cultura visuale in Italia. Prospettive della ricerca” svoltosi a Palermo tra il 19 e il 21 marzo 2018. Si è trattato di un incontro che ha visto la partecipazio- ne di molti dei protagonisti della ricerca italiana in quell’ambito “indisciplinato” – per usare una felice espressione di W.J.T. Mitchell – che è la cultura visuale, accademica e non, un campo di studi che ha ormai solide tradizioni internazionali e anche notevoli ricadute accademiche, come dimostra la presenza a Palermo di docenti che, pur provenendo da “altre” discipline, la comparatistica letteraria, l’estetica, la storia dell’arte, la mediologi…
De l’espace à l’étendue. L’évolution de l’imaginaire spatial dans l’œuvre de Saint-Exupéry
2010
L’espace chez Saint-Exupéry refuse la définition de « décor » et plus encore celle de « paysage », tout en gardant un lien fort avec les lieux concrets qui sont des repères pour l’homme. L’espace parcouru, connu dans sa matière, se révèle surtout à travers le dynamisme de l’imaginaire de l’auteur. D’après Bachelard, l’intérêt pour Saint-Exupéry « résidait dans la poétique des matières et des dynamismes ». L’espace devient le leitmotiv de son œuvre entière, ce qui nous a guidés dans la tentative d’illustrer l’évolution que celui-ci subit. Il s’agit d’un parcours pour ainsi dire « en spirale », soutenu par un tissu d’images qui s’alimente du contact avec les éléments du réel et au même temps …
«Per lo più senza desideri e un poco infelici». Ritratto della madre perduta in Wunschloses Unglück di Peter Handke
2020
In this work Wunschloses Unglück is read as if it were an impressionistic biography in images. The tale was born out of an attempt to give Handke’s fifty-year-old mother, who died of suicide, back a story and an identity. A way to give content and contours to the woman and to neutralize the depersonalizing effect of the news of the event in the pages of the local newspaper. The story of the mother is actually, from the very beginning, a reflection of the writer on his own work, on the difficulty of writing ‘true’ stories, on the tormented search for a precarious balance between description and documentation, between narration and image, between truth and fiction. Handke would seem to be gui…
Yoko Tawada und die Bildlichkeit der Buchstaben
2022
This article examines the role of language in the works of the German-Japanese author Yoko Tawada. For the analysis three works in which the writer deals with the languages Japanese and German will be considered: ›Talisman‹, ›Überseezungen‹, and ›Akzentfrei‹. Within the analysis the great imagination of Tawada will be underlined: She invents new words, new linguistic associations and surreal correspondences between signs and images. The world of the writer is a world between reality and fantasy and it must be observed with new eyes in order to be understood.