Illuminating the past: state of the art

Happa, Jassim; Mudge, Mark; Debattista, Kurt; Artusi, Alessandro; Gonçalves, Alexandrino; Chalmers, Alan

doi:10.1007/s10055-010-0154-x

Cited by 39 publications

(23 citation statements)

References 97 publications

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“…Reflectance Transformation Imaging). La técnica se basa en una iluminación digital interactiva con el elemento iluminado desde cualquier dirección resultando diferentes reflejos y sombras sobre la pieza (Happa et al, 2010;Malzbender, Gelb, Wolters, & Zuckerman, 2000;Mudge et al, 2010 (Guennebaud & Gross, 2007). Además, permite la coloración de los vértices de una malla o conjunto de puntos asignando colores a los vértices de la malla en función del grado de curvatura de la superficie subyacente.…”

Section: Metodologías De Visualizaciónunclassified

“…On the other hand, from both the 3D model and the point cloud, the study is completed with the application of the methods of analysis and visualisation based on the Morphological Residue Model (MRM) which stands out every single detail of the surface morphology of the object (Caninas, Pires, Henriques, & Chambino, 2016;Correia, Pires, & Sousa, 2014). Further visualisations are based on Reflectance Transformation Imaging (RTI) which provides different shadows and reflections over the object from the application of a multidirectional illumination (Happa et al, 2010;Malzbender, Gelb, Wolters, & Zuckerman, 2000;Mudge et al, 2010).…”

Section: Extended Abstractmentioning

confidence: 99%

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Aplicación de la fotogrametría automatizada y de técnicas de iluminación con herramientas SIG para la visualización y el análisis de una piedra con relieves antropomorfos

Torregrosa-Fuentes

Berrio

Tortosa

et al. 2018

Virtual archaeol. rev.

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Lo más destacado: Representación y análisis de relieves y grabados sobre elementos pétreos mediante virtualización con fotogrametría y obtención de modelos digitales. Aplicación de herramientas de visualización y SIG para el estudio de microtopografías en patrimonio cultural de pequeño tamaño. Necesidad de desarrollar metodologías para el estudio y puesta en valor del patrimonio así como la reinterpretación del patrimonio ya estudiado. Extended Abstract:We present a methodological approach for the representation, visualisation and analysis of three-dimensional (3D) models of meaningful details in stone reliefs provided by digital documentation tools and subsequent processing. For this aim, anthropomorphous shapes engraved on a flat stone slab found in Sierra de Fontcalent (Alicante) are studied. The object under consideration was located near two archaeological sites, Cova del Fum -a cave with presence of the Chalcolithic material (López, 2010)-and the archaeological site of Fontcalent, with remains from different phases of occupation spanning from 7 th -6 th BC to the 20 th century (Ximénez, 2012).In the last few years, the use of digital tools provided by new technologies and software development has left traditional work methodology behind (De Reu et al., 2014) while enabling the development of new approaches to both minimise heritage alteration and provide objective and accurate information (Lopez-Menchero, Marchante, Vincent, Cárdenas, & Onrubia, 2017). 3D documentation allows recording of cultural heritage at a reasonable cost with precision and quality through digital photography and SfM (Structure from Motion) photogrammetry with specialised software (De Reu et al., 2013).

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Section: Metodologías De Visualizaciónunclassified

Section: Extended Abstractmentioning

confidence: 99%

Aplicación de la fotogrametría automatizada y de técnicas de iluminación con herramientas SIG para la visualización y el análisis de una piedra con relieves antropomorfos

Torregrosa-Fuentes

Berrio

Tortosa

et al. 2018

Virtual archaeol. rev.

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“…Physical realism in archaeological modelling has had only limited attention (Chalmers 2002;Chalmers et al 2007;Devlin and Chalmers 2001;Devlin et al 2002;Gonalves et al 2008;Happa et al 2009b). In particular predictive rendering, which distinguishes approaches that accurately simulate physical interactions between light, surfaces and volumes (Weidlich and Wilkie 2008) from simulating the appearance of realism (photorealistic rendering), is poorly explored in cultural heritage.…”

Section: Physical Realism and Predictive Renderingmentioning

confidence: 99%

Modeling in Archaeology: Computer Graphic and other Digital Pasts

Earl

2013

Perspectives on Science

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“…PTMs of an object can be created from multiple images acquired under different incident light directions, without specific hardware (low-end digital camera provides enough resolution to produce good PTMs, and almost any type of light source can be used). Several applications of this technique have been proposed, mainly in the field of Cultural Heritage [9,2,3], where this type of image and other similar ones [5] have demonstrated to be very useful for analysis purposes.…”

Section: Introductionmentioning

confidence: 99%

Edge Detection on Polynomial Texture Maps

Brognara

Corsini

Dellepiane

et al. 2013

Image Analysis and Processing – ICIAP 2013

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Abstract. In this paper we propose a simple method to extract edges from Polynomial Texture Maps (PTM) or other kinds of Reflection Transformation Image (RTI) files. It is based on the idea of following 2D lines where the variation of corresponding 3D normals computed from the PTM coefficients is maximal. Normals are estimated using a photometric stereo approach, derivatives along image axes directions are computed in a multiscale framework providing normal discontinuity and orientation maps and lines are finally extracted using non-maxima suppression and hysteresis thresholds as in Canny's algorithm. In this way it is possible to discover automatically potential structure of interest (inscriptions, small reliefs) on Cultural Heritage artifacts of interest without the necessity of interactively recreating images using different light directions. Experimental results obtained on test data and new PTMs acquired in an archaeological site in the Holy Land with a simple low-end camera, show that the method provides potentially useful results.

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Illuminating the past: state of the art

Cited by 39 publications

References 97 publications

Aplicación de la fotogrametría automatizada y de técnicas de iluminación con herramientas SIG para la visualización y el análisis de una piedra con relieves antropomorfos

Aplicación de la fotogrametría automatizada y de técnicas de iluminación con herramientas SIG para la visualización y el análisis de una piedra con relieves antropomorfos

Modeling in Archaeology: Computer Graphic and other Digital Pasts

Edge Detection on Polynomial Texture Maps

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