Search results for "TRANSFORMATION"
showing 10 items of 1634 documents
Landscape Architecture and the Green Deal Dare: Five Successful Experiences in Urban Open Spaces
2022
The present work focuses on European cities’ environments and open spaces, aiming to demonstrate how, through landscape architecture, it is possible to respond effectively to many of the ecological and social hardships that the Green Deal aspires to alleviate. It was signed in 2019 by all of the member countries of the Union, seeks to reverse the climate change trend by establishing a series of goals for improving environmental and economic quality for 2030 and 2050 and also aims to enact social justice in rural areas and in the urban environment. Landscape architecture, which is the art of combining the physical and immaterial elements in cities’ open spaces, is taken in this w…
Paesaggi abusivi in Sicilia
2016
La questione dell’abusivismo edilizio in Sicilia si può leggere come parte di un fenomeno più vasto, quello di una espansione poco programmata e costituita da una grande quantità di edifici costruiti prevalentemente a uso residenziale, tra gli anni ‘60 e ’80, da piccoli imprenditori o da privati, e che hanno dato vita a parti di città dimensionalmente rilevanti. Questi edifici o insediamenti urbani, che si presentano ancora frammentati e incompiuti, sono riconoscibili per materiali, per povertà di linguaggio, per tecnica costruttiva prevalente. Una gran parte di essi sono stati realizzati originariamente fuori dalle regole urbanistiche prescritte, ma nel tempo hanno prodotto tessuti e paesa…
Il PAV di Torino, un parco in movimento
2013
Nella “liquidità” contemporanea, la possibilità di una cura dell’afasia diffusa impone un ripensamento che coincide con la parola ri-uso, nella sua accezione di recupero di senso, traduzione, riconversione. In una parola trasformazione. In una poetica del riuso, nella sua accezione di ritorno alla vita e trasformazione, s’inserisce il PAV - Parco Arte Vivente di Torino, con la sua architettura semi-ipogea. Attraverso l'esperienza del PAV, centro sperimentale di arte contemporanea, si analizza il ruolo del museo nei processi di trasformazione urbana. In contemporary "liquidity," the possibility of a cure for widespread aphasia imposes a rethinking that coincides with the word re-use, in its …
Stability of Microgrids: An Application of Virtual Synchronous Generator
2022
The objective of this paper is to illustrate an alternative control algorithm for power converters which have the task of introducing the energy generated by systems based on the use of renewable sources such as, photovoltaic or wind power, in to small-sized networks, microgrids. Virtual Synchronous Generator can operate both in parallel to the main network as well as in isolated and autonomous conditions (islanding-mode). The contribute of this work is to drive a consolidate approach, made in time domain, in a more flexible and less time-consuming approach based on Park transformation.
Copy–Move Forgery Detection by Matching Triangles of Keypoints
2015
Copy-move forgery is one of the most common types of tampering for digital images. Detection methods generally use block-matching approaches, which first divide the image into overlapping blocks and then extract and compare features to find similar ones, or point-based approaches, in which relevant keypoints are extracted and matched to each other to find similar areas. In this paper, we present a very novel hybrid approach, which compares triangles rather than blocks, or single points. Interest points are extracted from the image, and objects are modeled as a set of connected triangles built onto these points. Triangles are matched according to their shapes (inner angles), their content (c…
Composition of SIFT features for robust image representation
2010
In this paper we propose a novel feature based on SIFT (Scale Invariant Feature Transform) algorithm1 for the robust representation of local visual contents. SIFT features have raised much interest for their power of description of visual content characterizing punctual information against variation of luminance and change of viewpoint and they are very useful to capture local information. For a single image hundreds of keypoints are found and they are particularly suitable for tasks dealing with image registration or image matching. In this work we stretched the spatial coverage of descriptors creating a novel feature as composition of keypoints present in an image region while maintaining…
Real-time estimation of geometrical transformation between views in distributed smart-cameras systems
2008
In this paper, we present a method to automatically estimate the geometric relations among the different views of cameras with partially overlapping fields of view in a wireless video-surveillance system. The method uses the locations of the detected moving objects visible at the same time in two or more views. The correspondences among objects are found by comparing their appearance models based on dominant colour descriptors while the geometric transformation are computed iteratively and may be used to solve the consistent labelling problem. As a significant part of the processing is performed on the smart cameras, the method has been conceived by taking into account the limited resources…
A New Class of Searchable and Provably Highly Compressible String Transformations
2019
The Burrows-Wheeler Transform is a string transformation that plays a fundamental role for the design of self-indexing compressed data structures. Over the years, researchers have successfully extended this transformation outside the domains of strings. However, efforts to find non-trivial alternatives of the original, now 25 years old, Burrows-Wheeler string transformation have met limited success. In this paper we bring new lymph to this area by introducing a whole new family of transformations that have all the "myriad virtues" of the BWT: they can be computed and inverted in linear time, they produce provably highly compressible strings, and they support linear time pattern search direc…
Multi-modal Medical Image Registration by Local Affine Transformations
2018
Image registration is the process of finding the geometric transformation that, applied to the floating image, gives the registered image with the highest similarity to the reference image. Registering a pair of images involves the definition of a similarity function in terms of the parameters of the geometric transformation that allows the registration. This paper proposes to register a pair of images by iteratively maximizing the empirical mutual information through coordinate gradient descent. Hence, the registered image is obtained by applying a sequence of local affine transformations. Rather than adopting a uniformly spaced grid to select image blocks to locally register, as done by s…
Effective and Efficient Interpolation for Mutual Information based Multimodality Elastic Image Registration
2009
Mutual information (MI) is a popular similarity metric for multimodality image registration purpose. However, it is negatively influenced by artifacts due to interpolation effects. As a result, registration algorithms performance could be affected. In this paper a novel interpolation scheme is presented. It is both effective and efficient. Effective because it limits the presence of local maxima in the mutual information curve, efficient because it is simple to compute being based on simple and optimized distance measures. The method is validated and compared against other techniques both from performance and time complexity persepectives. Differently from other reference works, which perfo…