scholarly journals Cultural Heritage Destruction: Experiments with Parchment and Multispectral Imaging

10.5334/bat.h ◽  
2016 ◽  
pp. 121-146
Author(s):  
Alberto Campagnolo ◽  
◽  
Alejandro Giacometti ◽  
Lindsay MacDonald ◽  
Simon Mahony ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Multispectral Imaging

scholarly journals Image Quality Degradation Caused by Color Transformations in Multispectral Imaging—A Practical Review

2020 ◽  
Vol 2020 (1) ◽  
pp. 60-67
Author(s):  
Roy S. Berns
Keyword(s):  
Cultural Heritage ◽  
Digital Imaging ◽  
High Speed ◽  
Multispectral Imaging ◽  
High Volume ◽  
Volume Imaging ◽  
Single Instance ◽  
Image Digitization ◽  
Future Work

The still imaging portion of FADGI [1] continues to be a living document that has evolved from its theoretical digital imaging principles of a decade ago into adaptations for the realities of day-to-day cultural heritage workflows. While the initial document was a bit disjointed, the 2016 version is a solid major improvement and has proven very useful in gauging digital imaging goodness. [2] With coaching, encouragement and focused attention to detail many users, even the unschooled, have achieved 3-star compliance, sometimes with high-speed sheet-fed document scanners. 4-star levels are not far behind. This is a testimony to an improved digital image literacy for the cultural heritage sector that the authors articulated at the beginning of the last decade. This objective and science based literacy has certainly evolved and continues to do so. It is fair to say that no other imaging sector has such comprehensive objective imaging guidelines as those of FADGI, especially in the context of high volume imaging workflows. While initial efforts focused on single instance device benchmarking, future work will concentrate on performance consistency over the long term. Image digitization for cultural heritage will take on a decidedly industrial tone. With practice, we continue to learn and refine the practical application of FADGI guidelines in the preservation of meaningful information. Like rocks in a farm field, every year new issues and errors with current practices surface that were previously hidden from view. Some are incidental, others need short term resolution. The goal of this paper is to highlight these and make proposals for easier, less costly, and less frustrating ways to improve imaging goodness through the FADGI guidelines.

scholarly journals MULTISPECTRAL IMAGING IN CULTURAL HERITAGE CONSERVATION

2017 ◽  
Vol XLII-2/W5 ◽  
pp. 155-162 ◽  
Author(s):  
S. Del Pozo ◽  
P. Rodríguez-Gonzálvez ◽  
L. J. Sánchez-Aparicio ◽  
A. Muñoz-Nieto ◽  
D. Hernández-López ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Spectral Range ◽  
Multispectral Imaging ◽  
Research Work ◽  
Construction Materials ◽  
Added Value ◽  
Passive Sensors ◽  
Imaging And Spectroscopy ◽  
2D Data ◽  
Shortwave Infrared

This paper sums up the main contribution derived from the thesis entitled "<i>Multispectral imaging for the analysis of materials and pathologies in civil engineering, constructions and natural spaces</i>" awarded by CIPA-ICOMOS for its connection with the preservation of Cultural Heritage. This thesis is framed within close-range remote sensing approaches by the fusion of sensors operating in the optical domain (visible to shortwave infrared spectrum). In the field of heritage preservation, multispectral imaging is a suitable technique due to its non-destructive nature and its versatility. It combines imaging and spectroscopy to analyse materials and land covers and enables the use of a variety of different geomatic sensors for this purpose. These sensors collect both spatial and spectral information for a given scenario and a specific spectral range, so that, their smaller storage units save the spectral properties of the radiation reflected by the surface of interest. The main goal of this research work is to characterise different construction materials as well as the main pathologies of Cultural Heritage elements by combining active and passive sensors recording data in different ranges. Conclusions about the suitability of each type of sensor and spectral range are drawn in relation to each particular case study and damage. It should be emphasised that results are not limited to images, since 3D intensity data from laser scanners can be integrated with 2D data from passive sensors obtaining high quality products due to the added value that metric brings to multispectral images.

scholarly journals Cultural Heritage Destruction: Documenting Parchment Degradation via Multispectral Imaging

2012 ◽  
Author(s):  
Alejandro Giacometti ◽  
Alberto Campagnolo ◽  
Lindsay Macdonald ◽  
Simon Mahony ◽  
Melissa Terras ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Multispectral Imaging

scholarly journals Multi-spectral and Thermography Imaging Techniques for the Investigation of a 15th Century Wall Painting

2020 ◽  
Author(s):  
Marco Ricci ◽  
Stefano Laureti ◽  
Hamed Malekmohammadi ◽  
Stefano Sfarra ◽  
Marcello Melis ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Pulse Compression ◽  
Near Infrared ◽  
Multispectral Imaging ◽  
Imaging Techniques ◽  
Good Practice ◽  
Medical Diagnostics ◽  
Wall Painting ◽  
Imaging Method ◽  
15Th Century

Abstract When planning the restoration of an artwork, the good practice involves the evaluation of the item healthiness before starting the common operation of cleaning, consolidation, etc., possibly through non-invasive techniques that supply meaningful information about the whole item. Motivated by this need, a plethora of imaging techniques are used in cultural heritage diagnostic typically borrowed from other applications – e.g. medical diagnostics, nondestructive testing, etc., and then tailored for inspecting cultural heritage objects. In the inspection of a painting, hyper- and multi- spectral techniques are commonly used to analyze the outer layers (varnish, pictorial and drawing) while X-ray, tomography, and many other can be employed to investigate its inner structure. Although highly desirable, a single technique providing all the info about a painting is still not available, thus it is of great interest defining protocols that could optimally exploit the complementarities of a limited number of techniques. To this aim, the present paper shows the combined use of the Hypecolorimetric Multispectral Imaging (HMI) and that of the Pulse-Compression Thermography (PuCT) on a 15th century wall painting attributed to the Italian artist Antonio del Massaro, also known as Pastura, and representing the Madonna with the Child and the Saints Jerome and Francis. In particular, HMI is a multispectral imaging method working from the ultraviolet to the near infrared region, exploiting advanced processing based on artificial intelligence to define hypercolorimetric coordinates. Such approach guarantees a thorough analysis of the outer layers, underlining previous restorations, varnish alterations and allowing the pigments to be classified from a comparison with a large database. The PuCT method adopted here has been tailored for the specific needs of artworks’ inspection and it allows for a safe imaging of the multilayer structure of paintings, and hence the stratigraphy analysis, through a suitable processing of the time-domain thermal response. The capabilities and the complementarities of the two techniques, whose info can also be fused through postprocessing techniques, are illustrated in detail in this paper. A false-color imaging approach is also proposed to improve the readability and analysis of the thermography results.

scholarly journals Close-Range Sensing and Data Fusion for Built Heritage Inspection and Monitoring—A Review

2021 ◽  
Vol 13 (19) ◽  
pp. 3936
Author(s):  
Efstathios Adamopoulos ◽  
Fulvio Rinaudo
Keyword(s):  
Cultural Heritage ◽  
Laser Scanning ◽  
Multispectral Imaging ◽  
Structural Characteristics ◽  
Sensor Data ◽  
Successful Implementation ◽  
Range Sensing ◽  
Historical Structures ◽  
Built Heritage ◽  
Close Range

Built cultural heritage is under constant threat due to environmental pressures, anthropogenic damages, and interventions. Understanding the preservation state of monuments and historical structures, and the factors that alter their architectural and structural characteristics through time, is crucial for ensuring their protection. Therefore, inspection and monitoring techniques are essential for heritage preservation, as they enable knowledge about the altering factors that put built cultural heritage at risk, by recording their immediate effects on monuments and historic structures. Nondestructive evaluations with close-range sensing techniques play a crucial role in monitoring. However, data recorded by different sensors are frequently processed separately, which hinders integrated use, visualization, and interpretation. This article’s aim is twofold: i) to present an overview of close-range sensing techniques frequently applied to evaluate built heritage conditions, and ii) to review the progress made regarding the fusion of multi-sensor data recorded by them. Particular emphasis is given to the integration of data from metric surveying and from recording techniques that are traditionally non-metric. The article attempts to shed light on the problems of the individual and integrated use of image-based modeling, laser scanning, thermography, multispectral imaging, ground penetrating radar, and ultrasonic testing, giving heritage practitioners a point of reference for the successful implementation of multidisciplinary approaches for built cultural heritage scientific investigations.

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