Fringe-projection profilometry for recovering 2.5D shape of ancient coins

The relief of form is undoubtedly one of the most topical topics in the field of cultural heritage. Physical access to historic and artistic manufactures can be limited by a lot of factors. For example, the access to the collection of the ancient coins is difficult, especially for students. Indeed, for coins digital archive of high-quality three-dimensional model and remote fruition is of great interest. The use of projected fringes for the measurement of surface profile is a well-developed technique. In this paper, we present a surface profile measurement system for small objects of cultural heritage where it is important not only to detect the shape with good accuracy but also to capture and archive the signs due to ageing. The illustrated equipment is simple, reliable, and cheap. Furthermore, some examples of acquisitions are presented to demonstrate the potentiality of the proposed scheme for recovering 2.5D shape of cultural heritage objects.</p

Automatic instrument for aerosol samples using the beta-particle attenuation

This work describes an instrument developed for the routine measurement of aerosol mass using the beta-particle attenuation method. The design of the present instrument is particularly well suited for the automatic mass measurement of membrane filters used for the collection of airborne particles. The instrument uses electromechanical devices for the automatic positioning of filters in the sampling and measuring holders and the return to their stand by locations, where the filte rs are stored for off-line testing purposes and documentation. The instrument is designed with very low system 'dead time' and high sensitivity

Strumenti scientifici di supporto alla conoscenza e alla tutela del patrimonio culturale

Gli strumenti e le tecniche scientifiche, derivanti dalle scienze esatte, sono un utilissimo ausilio per lo studio e la progettazione ’interventi di valorizzazione del patrimonio culturale. Inoltre, esse possono risultare indispensabili per l’individuazione delle falsificazione. Agli studiosi di opere d’arte, così come a coloro che si occupano di reperti storici e/o archeologici, risulta di valido aiuto conoscere le tecniche scientifiche utilizzabili per risolvere uno specifico problema, sia esso di autenticazione che di valorizzazione e/o restauro

Uso dell'olografia conoscopica per il controllo della rugosità superficiale di monumenti marmorei esposti all'aperto.

In this paper, we propose the use of the laser profilometry, realized by means of the conoscopic holography, to measure the roughness. In the paper, some examples of measurements made on marble samples are presented

Virtual restoration: detection and removal of craquelure in digitized image of old paintings

Digital treatment of images has been widely used in many different fields, including astrophysical, medical, geographical and military research. In the last years, digital elaboration of the images has also been used in the field of the Cultural Heritage conservation. Many paintings, especially old ones, suffer from breaks in substrate, paint, or varnish. These patterns are usually called cracks or craquelure and can be caused by aging, drying, and mechanical factors. The appearance of cracks on paintings deteriorates the perceived image quality. However, one can use digital image processing techniques to detect and eliminate the cracks on digitized paintings. Such a ”virtual” restoration can provide clues to art historians, museum curators and the general public on how the painting would look like in its initial state, i.e., without the cracks. An integrated methodology for the detection and removal of cracks on digitized paintings is presented in this paper.