La restauración del Retrato Trivulzio de Antonello da Messina

El artículo presenta la intervención llevada a cabo en 2006 sobre el Retrato de hombre de Antonello da Messina, que pertenece a las colecciones del Museo Cívico de Arte Antiguo del Palacio Madame. The article presents the intervention carried out in 2006 about the Portrait of a man of Antonello da Messina, which belongs to the collections of the Civic Museum of Ancient Art of the Madame Palace.El artículo presenta la intervención llevada a cabo en 2006 sobre el Retrato de hombre de Antonello da Messina, que pertenece a las colecciones del Museo Cívico de Arte Antiguo del Palacio Madame.&nbsp

Foreword to the Special Section on Smart Tools and Applications in Computer Graphics 2017

This special section contains extended versions of the three best papers presented at the conference Smart Tools and Apps in Com- puter Graphics

Fast and simple automatic alignment of large sets of range maps

We present a very fast and simple-to-implement algorithm for the automatic registration of a large number of range maps. The proposed algorithm exploits a compact and GPU-friendly descriptor specifically designed for the alignment of this type of data. This pairwise registration algorithm, which also includes a simple mechanism to avoid to get false positives, is part of a system capable to align a sequence of up to hundreds of range maps in few minutes. In order to reduce the number of pairs to align in the case of unordered range maps we use a prioritization strategy based on the fast computation of the correlation between range maps through FFT. The proposed system does not need any user input and it was tested successfully on a large variety of datasets coming from real acquisition campaigns

The Marching Intersections Algorithm for merging range images

A new algorithm for the integration of partially overlapping range images into a triangular mesh is presented. The algorithm consists of three main steps: it locates the intersections between the range surfaces and a reference grid chosen by the user, then merges all nearly coincident and redundant intersections according to a proximity criterion, and, finally, reconstructs the merged surface(s) from the filtered intersection set. Compared with previous methods, which adopt a volumetric approach, our algorithm shows lower computational costs and improves the accuracy of the surfaces produced. It takes into account the quality of the input measurements and is able to patch small holes corresponding to the parts of the 3D scanned object that were not observed by the acquisition device. The algorithm has been tested on several datasets of range maps; graphical and numeric results are reported. Key words: 3D scanning – Range map – Range image merging – Volumetric approach to fusion – Marching Intersection

Virtual marching cubes: simple and efficient topological simplification

Consiglio Nazionale delle Ricerche - Biblioteca Centrale - P.le Aldo Moro, 7 Rome / CNR - Consiglio Nazionale delle RichercheSIGLEITItal

Visualization and 3D data processing in David's restoration

Printed from http://www.isti.cnr.it target=NewWindow>www.isti.cnr.it (March 2005). - On the web page: '2003-10-30'Consiglio Nazionale delle Ricerche - Biblioteca Centrale - P.le Aldo Moro, 7 , Rome / CNR - Consiglio Nazionale delle RichercheSIGLEITItal

“Ecce Homo” by Antonello da Messina, from non-invasive investigations to data fusion and dissemination

none16noScientifc investigations of artworks are crucial in terms of preservation since they provide a measurable evaluation of the materials and the state of conservation. This is the case of Antonello da Messina’s painting “Ecce Homo”: its delicate state of conservation, with the need for constant monitoring, required a broad and in-depth diagnostic campaign to support the restorers. The project was carried out entirely in situ using non-invasive cutting-edge techniques and proposes a multimodal and data-centric approach, integrating 3D and 2D methodologies. The surface irregularities and the support were analysed with a structured-light 3D scanner and X-ray tomography. The painting materials were investigated with X-ray fuorescence scanning (MA-XRF) and refectance hyperspectral imaging (HSI). Primarily, the data were jointly used for a scientifc scope and provided new knowledge of the painting in terms of materials and painting techniques. In addition, two web-based interactive platforms were developed: one to provide restorers and experts with a new perspective of the hidden geometries of the painting, and the other targeted at the general public for dissemination purposes. The results of the Ecce Homo scientifc analysis were exhibited, using a touch-screen interface, and developed for diferent user levels, from adults to kids.openAlbertin, Fauzia; Ruberto, Chiara; Cucci, Costanza; Callieri, Marco; Potenziani, Marco; Siotto, Eliana; Pingi, Paolo; Scopigno, Roberto; Bettuzzi, Matteo; Brancaccio, Rosa; Morigi, Maria Pia; Castelli, Lisa; Taccetti, Francesco; Picollo, Marcello; Stefani, Lorenzo; de Vita, FrancescaAlbertin, Fauzia; Ruberto, Chiara; Cucci, Costanza; Callieri, Marco; Potenziani, Marco; Siotto, Eliana; Pingi, Paolo; Scopigno, Roberto; Bettuzzi, Matteo; Brancaccio, Rosa; Morigi, Maria Pia; Castelli, Lisa; Taccetti, Francesco; Picollo, Marcello; Stefani, Lorenzo; de Vita, Francesc