Search results for " Reconstruction"

Techniques and procedures for the definition of AR applications in architectural and archaeological contexts

2022

The growth and development of Augmented reality applications and their use in different contexts has been recently fostered by two factors: i) the hardware and computing power of mobile devices has been radically improved; ii) Apple and Google have released two development platforms for AR applications. AR has been a major topic in research on cultural heritage fruition for many years, but the latest developments are really promising, and they seem capable of overcoming the difficulties that have delayed the diffusion of this technology. The paper focuses the potential and criticalities of augmented reality systems used for fruition purposes in architectural and archaeological contexts. The…

Per un teatro dell'architettura e della città: teorie e pratiche di realtà aumentata alla Cité de l'architecture et du patrimoine al Palais de Chaill…

2017

Lo studio presenta gli esiti di una ricerca volta allo sviluppo di un allestimento museale con sole tecniche di realtà aumentata per la Cité de l’architecture et du patrimoine (Palais de Chaillot, Parigi). Realizzato sfruttando la recentissima piattaforma Google Tango, questo sistema permette al visitatore di accedere a contenuti multimediali e visualizzare ricostruzioni digitali 3D, appositamente elaborate, semplicemente inquadrando con uno smartphone Tango-enabled i calchi e i plastici esposti nel museo. This study presents the results of a research which aims to develop a museum exhibition planning, with interactive augmented reality techniques, at the Cité de l’architecture et du patrim…

Sealing the Cranial Base Access After Endonasal Endoscopic Approach: Reabsorption Rate of Fat Graft in the "3FTechnique".

2022

Mathematical Methods in Image Processing and Computer Vision

2016

Image processing and computer vision are growing research fields that take advantage of the increasing power or modern computers linked with sophisticated techniques coming from many fields of expertise and in particular from mathematics. We present an introduction to some problems in computer vision and image processing and to some mathematical techniques and concepts that are nowadays routinely used to approach them.

Low cost three-dimensional virtual model construction for remanufacturing industry

2018

Remanufactured products can save up to 80% of production and energy costs whilst generating lower CO2 emissions. The key success factors for remanufacturing are quality, lead-time and cost. Extensive work within the industry and the detailed analysis of the remanufacturing process has shown that component inspection has significant bearing on overall productivity. Remanufacturing lacks automation because activities are predominantly manual. Automation of remanufacturing process will not only decrease the number of non-remanufacturable components, through decreasing cost and increasing consistency in quality, but also attract industries to design for remanufacture. A digital model of the com…

An adaptive-PCA algorithm for reflectance estimation from color images

2008

This paper deals with the problem of spectral reflectance estimation from color camera outputs. Because the reconstruction of such functions is an inverse problem, stabilizing the reconstruction process is highly desirable. One way to do this is to decompose reflectance function on a basis functions like PCA. The present work proposes an algorithm making PCA adaptive in reflectance estimation from a color camera output. We propose to adapt the PCA basis derivation by selecting, for each sample, the more relevant elements from the training set elements. The adaptivity criterion is achieved by a likelihood measurement. Finally, the spectral reflectance estimation results are evaluated with th…

Reflectance-based surface saliency

2017

In this paper, we propose an original methodology allowing the computation of the saliency maps for high dimensional RTI data (Reflectance Transformation Imaging). Unlike most of the classical methods, our approach aims at devising an intrinsic visual saliency of the surface, independent of the sensor (image) and the geometry of the scene (light-object-camera). From RTI data, we use the DMD (Discrete Modal Decomposition) technique for the angular reflectance reconstruction, which we extend by a new transformation on the modal basis enabling a rotation-invariant representation of reconstructed reflectances. This orientation-invariance of the resulting reflectance shapes fosters a robust esti…

Una chiesa scomparsa “dentro della nuova, assai più magnifica”. Progetti e ricostruzioni della cattedrale di Mdina tra Medioevo ed Età Moderna

2023

A corpus of drawings attributable to the seventeenth and eighteenth centuries, and preserved in the Diocesan archive of Mdina, allows us to better understand the reconstruction of the Cathedral of Malta after the earthquake of 1693, which damaged the medieval building. This had already been interested, a few years earlier, bu some works that had affected the presbytery area. The survey and project drawings, partly published but never studied in depth, offer valuable information on the medieval church and on the transformation process, on the relationship between the pre-existing buildings and the new projects. Starting from the available drawings, and with the support of documentary data an…

Improved Bone Regeneration Using Biodegradable Polybutylene Succinate Artificial Scaffold in a Rabbit Model

2022

The treatment of extensive bone loss represents a great challenge for orthopaedic and reconstructive surgery. Most of the time, those treatments consist of multiple-stage surgeries over a prolonged period, pose significant infectious risks and carry the possibility of rejection. In this study, we investigated if the use of a polybutylene succinate (PBS) micro-fibrillar scaffold may improve bone regeneration in these procedures. In an in vivo rabbit model, the healing of two calvarial bone defects was studied. One defect was left to heal spontaneously while the other was treated with a PBS scaffold. Computed tomography (CT) scans, histological and immunohistochemical analyses were performed …

A multiproxy record of palaeoenvironmental conditions at the Middle Palaeolithic site of Abric del Pastor (Eastern Iberia)

2019

This paper presents a multiproxy palaeoenvironmental study from Abric del Pastor (Alcoy, Spain), a rock shelter which has yielded evidence for Middle Palaeolithic human occupation. The sedimentary sequence has been analysed for lipid biomarker n-alkane abundances (ACL, CPI), compound specific leaf wax δH and δC, and bulk organic geochemistry (TOC, %N, %S), providing a record of past climate and local vegetation dynamics. Site formation processes have been reconstructed through the application of soil micromorphology. Analyses of anthracological, microvertebrate and macrofaunal assemblages from selected subunits are also presented here. Our data indicates that a variable climate marked by pr…