Dr. Andrea Casini Profile

Dr. Andrea Casini

at Istituto di Fisica Applicata Nello Carrara

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Publications (8)

Proceedings Article | 12 July 2019 Presentation + Paper

Merging of imaging techniques based on reflectance hyperspectral and neutron tomography for characterization of a modern replica of a 13th century knife from Croatia

Francesco Grazzi, Costanza Cucci, Andrea Casini, Lorenzo Stefani, Nikolay Kardjilov, Adam Thiele, Jiři Hošek, Marcello Picollo

Proceedings Volume 11058, 1105816 (2019) https://doi.org/10.1117/12.2526050

KEYWORDS: Iron, Tomography, Reflectivity, Near infrared, Hyperspectral imaging, RGB color model, Data acquisition, Head, Feature extraction, Visible radiation

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Proceedings Article | 11 July 2017 Paper

Bridging research with innovative products: a compact hyperspectral camera for investigating artworks: a feasibility study

Costanza Cucci, Andrea Casini, Lorenzo Stefani, Marcello Picollo, Jouni Jussila

Proceedings Volume 10331, 1033106 (2017) https://doi.org/10.1117/12.2270015

KEYWORDS: Software development, Visualization, Spectral imaging cameras, Hyperspectral imaging, Cameras, Analytical research, Reflectivity, Algorithm development, Cultural heritage, Reflectance spectroscopy, Diagnostics, Imaging spectroscopy, Data processing

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For more than a decade, a number of studies and research projects have been devoted to customize hyperspectral imaging techniques to the specific needs of conservation and applications in museum context. A growing scientific literature definitely demonstrated the effectiveness of reflectance hyperspectral imaging for non-invasive diagnostics and highquality documentation of 2D artworks. Additional published studies tackle the problems of data-processing, with a focus on the development of algorithms and software platforms optimised for visualisation and exploitation of hyperspectral bigdata sets acquired on paintings. This scenario proves that, also in the field of Cultural Heritage (CH), reflectance hyperspectral imaging has nowadays reached the stage of mature technology, and is ready for the transition from the R&D phase to the large-scale applications. In view of that, a novel concept of hyperspectral camera - featuring compactness, lightness and good usability - has been developed by SPECIM, Spectral Imaging Ltd. (Oulu, Finland), a company in manufacturing products for hyperspectral imaging. The camera is proposed as new tool for novel applications in the field of Cultural Heritage. The novelty of this device relies in its reduced dimensions and weight and in its user-friendly interface, which make this camera much more manageable and affordable than conventional hyperspectral instrumentation. The camera operates in the 400-1000nm spectral range and can be mounted on a tripod. It can operate from short-distance (tens of cm) to long distances (tens of meters) with different spatial resolutions. The first release of the prototype underwent a preliminary in-depth experimentation at the IFAC-CNR laboratories. This paper illustrates the feasibility study carried out on the new SPECIM hyperspectral camera, tested under different conditions on laboratory targets and artworks with the specific aim of defining its potentialities and weaknesses in its use in the Cultural Heritage field.

Proceedings Article | 30 May 2013 Paper

Extending hyperspectral imaging from Vis to NIR spectral regions: a novel scanner for the in-depth analysis of polychrome surfaces

Costanza Cucci, Andrea Casini, Marcello Picollo, Lorenzo Stefani

Proceedings Volume 8790, 879009 (2013) https://doi.org/10.1117/12.2020286

KEYWORDS: Near infrared, Scanners, Prototyping, Data acquisition, RGB color model, Cameras, Hyperspectral systems, Visualization, Spatial resolution, Reflectivity

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Proceedings Article | 6 June 2011 Paper

Open issues in hyperspectral imaging for diagnostics on paintings: when high-spectral and spatial resolution turns into data redundancy

Costanza Cucci, Andrea Casini, Marcello Picollo, Marco Poggesi, Lorenzo Stefani

Proceedings Volume 8084, 808408 (2011) https://doi.org/10.1117/12.889460

KEYWORDS: Spatial resolution, Scanners, Spectral resolution, Diagnostics, Hyperspectral imaging, Data acquisition, Imaging systems, Cameras, Infrared radiation, Multispectral imaging

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Hyper-Spectral Imaging (HSI) has emerged in the last decade as one of the most promising technologies for diagnostics and documentation of polychrome surfaces. Despite the fact that presently HSI is a well-established technique for non-invasive investigations on paintings, a number of technological issues remain open and are still topics for on-going studies. In particular, it is known that high spatial resolution is a crucial parameter for obtaining high quality images, whereas the possibility to identify pictorial materials strictly depends on the spectral resolution and on the extent of the spectral region investigated. At the same time, by increasing the sampling rates in both the spatial and spectral dimensions, the size of the data-set will be enlarged and the acquisition times will be lengthened. As a consequence, a good compromise between the acquisition of highquality data and their application should always be reached, taking into account the specific purposes of the HSI application. The above questions are discussed in the present work, which illustrates two applications of the latest version of a hyperspectral scanner designed at IFAC-CNR for the digitization of artworks. The prototype has recently been upgraded, with new visualization software as well as mechanical and optical improvements. This high performance system operates in the 400-1000nm spectral range, with a spectral resolution of about 2-3 nm and a spatial sampling of 0.1 mm over areas of about 1 m². Three case-studies are presented, which highlight the importance of both high spatial and high spectral sampling rate in hyperspectral imaging. Two of the examples reported focus on the full exploitation of the spatial resolution: the first one is a study performed on a small painting, dated from the eighteenth century and belonging to the Uffizi Gallery in Florence; the second case-study refers to the valuable "Carrand diptych" (14^th century) from the Bargello Museum in Florence. The last application, instead, shows the crucial importance of a high spectral resolution to identify selected pigments in the oil-painting "Ritratto di Maffeo Barberini", dated around 1596-1600, which has recently been attributed to Caravaggio.

Proceedings Article | 12 August 2005 Paper

Fiber optic reflectance spectroscopy and hyper-spectral image spectroscopy: two integrated techniques for the study of the Madonna dei Fusi

A. Casini, M. Bacci, C. Cucci, F. Lotti, S. Porcinai, M. Picollo, B. Radicati, M. Poggesi, L. Stefani

Proceedings Volume 5857, 58570M (2005) https://doi.org/10.1117/12.611500

KEYWORDS: Fiber optics, Reflectivity, Reflectance spectroscopy, Scanners, Imaging spectroscopy, Spectroscopy, Spectrographs, Absorption, Near infrared, Cameras

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Proceedings Article | 7 January 2004 Paper

A new stationary imaging interferometer: first results

Alessandro Barducci, Andrea Casini, Francesco Castagnoli, Paolo Marcoionni, Ivan Pippi, Maria Sgavetti

Proceedings Volume 5159, (2004) https://doi.org/10.1117/12.504755

KEYWORDS: Interferometers, Fourier transforms, Spectral resolution, Calibration, Sensors, Imaging systems, Spectrometers, Modulation, Helium neon lasers, Diffusers

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Proceedings Article | 2 August 2002 Paper

Performance assessment of a stationary imaging interferometer for high-resolution remote sensing

Alessandro Barducci, Andrea Casini, Francesco Castagnoli, Paolo Marcoionni, Marco Morandi, Ivan Pippi

Proceedings Volume 4725, (2002) https://doi.org/10.1117/12.478789

KEYWORDS: Interferometers, Remote sensing, 3D image processing, Hyperspectral imaging, Aerospace engineering, Spectral resolution, Numerical simulations

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Proceedings Article | 17 November 2000 Paper

Quality issues for archival of ancient documents

Bruno Aiazzi, Stefano Baronti, Andrea Casini, Franco Lotti, Alberto Mattei, Leonardo Santurri

Proceedings Volume 4122, (2000) https://doi.org/10.1117/12.409241

KEYWORDS: Image compression, RGB color model, Interference (communication), Error analysis, Chromium, Computer programming, Speckle, Statistical analysis, Cultural heritage, Quantization

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Showing 5 of 8 publications

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