@article{Stampouloglou2020,

title = {Archaeological anastylosis of two Macedonian tombs in a 3D virtual environment},

author = {Maria Stampouloglou and Olympia Toska and Sevasti Tapinaki and Georgia Kontogianni and Margarita Skamantzari and Andreas Georgopoulos},

url = {https://doi.org/10.4995/var.2020.11877 https://polipapers.upv.es/index.php/var/article/view/11877},

doi = {10.4995/var.2020.11877},

issn = {1989-9947},

year  = {2020},

date = {2020-01-01},

journal = {Virtual Archaeol. Rev.},

volume = {11},

number = {22},

pages = {26},

publisher = {Universitat Politecnica de Valencia},

abstract = {Archaeological restoration of monuments is a practice requiring extreme caution and thorough study. Archaeologists and conservation experts are very reluctant to proceed to restoration and indeed to reconstruction actions without detailed consultation and thought. Nowadays, anastylosis executed on the real object is practically prohibited. Contemporary technologies have provided archaeologists and other conservation experts with the tools to embark on virtual restorations or anastyloses, thus testing various alternatives without physical intervention on the monument itself. In this way, the values of the monuments are respected according to international conventions. In this paper, two such examples of virtual archaeological anastyloses of two important Macedonian tombs in northern Greece are presented. The anastyloses were performed on three-dimensional (3D) models which have been produced using modern digital 3D documentation techniques, such as image-based modelling and terrestrial laser scanning. The reader is introduced to the history and importance \textendashas well as the peculiarities\textendash of the Macedonian tombs. In addition, the two tombs are described in detail mainly from an archaeological point of view The process of field data acquisition and processing to produce the 3D models are described. Simple and more or less standard methods were employed in acquiring the raw data. Processing was carried out using commercial software. The resulting 3D models and other documentation products are assessed for their accuracy and completeness. The decisions for the virtual anastylosis are explained in detail and the actual process is also described. The restored monuments are presented and evaluated by the conservation experts. Thus, it is shown how important virtual anastylosis of monuments is to archaeological researchers, as it enables them to conduct in-depth studies, without actually tampering with the monuments themselves. Digital 3D models are contributing to many disciplines, especially in archaeology, as they enable a wider audience to easily access both archaeological and geometric information as well as offering a high degree of interaction possibilities.},

keywords = {3D documentation, Image-Based modelling, Terrestrial laser scanning, virtual anastylosis},

pubstate = {published},

tppubtype = {article}

}

@article{Katsichti2019,

title = {3D DOCUMENTATION OF FRAIL ARCHAEOLOGICAL FINDS USING LOW-COST INSTRUMENTATION},

author = {V Katsichti and Georgia Kontogianni and Andreas Georgopoulos},

url = {https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-2-W17/157/2019/},

doi = {10.5194/isprs-archives-XLII-2-W17-157-2019},

issn = {2194-9034},

year  = {2019},

date = {2019-11-01},

journal = {ISPRS - Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci.},

volume = {XLII-2/W17},

number = {2/W17},

pages = {157--164},

abstract = {Abstract. In archaeological excavations, many small fragments or artefacts are revealed whose fine details sometimes should be captured in 3D. In general, 3D documentation methods fall into two main categories: Range-Based modelling and Image-Based modelling. In Range Based modelling, a laser scanner (Time of Flight, Structured light, etc.) is used for the raw data acquisition in order to create the 3D model of an object. The above method is accurate enough but is still very expensive in terms of equipment. On the other hand, Image-Based modelling, is affordable because the equipment required is merely a camera with the appropriate lens, and possibly a turntable and a tripod. In this case, the 3D model of an object is created by suitable processing of images which are taken around the object with a large overlap. In this paper, emphasis is given on the effectiveness of 3D models of frail archaeological finds originate from the palatial site of Ayios Vasileios in Laconia in the south-eastern Peloponnese, using low-cost equipment and methods. The 3D model is also produced using various, mainly freeware, hence low-cost, software and the results are compared to those from a well-established commercial one.},

keywords = {Conservation, Foldio 360, Fresco fragments, Image-Based modelling},

pubstate = {published},

tppubtype = {article}

}

@article{Kontogianni2018,

title = {EXPLOITING MIRRORS IN 3D RECONSTRUCTION OF SMALL ARTEFACTS},

author = {Georgia Kontogianni and A T Thomaidis and Regina Chliverou and Andreas Georgopoulos},

url = {https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-2/531/2018/},

doi = {10.5194/isprs-archives-XLII-2-531-2018},

issn = {2194-9034},

year  = {2018},

date = {2018-05-01},

journal = {ISPRS - Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci.},

volume = {XLII-2},

number = {2},

pages = {531--537},

publisher = {International Society for Photogrammetry and Remote Sensing},

abstract = {3D reconstruction of small artefacts is very significant in order to capture the details of the whole object irrespective of the documentation method which is used (Ranged Based or Image Based). Sometimes it is very difficult to achieve it because of hidden parts, occlusions, and obstructions which the object has. Hence, more data are necessary in order to 3D digitise the whole of the artefact leading to increased time for collecting and consequently processing the data. A methodology is necessary in order to reduce the collection of the data and therefore their processing time especially in cases of mass digitisation. So in this paper, the use of mirrors in particular high-quality mirrors in the data acquisition phase for the 3D reconstruction of small artefacts is investigated. Two case studies of 3D reconstruction are presented: the first one concerns Range-Based modelling especially a Time of Flight laser scanner is utilised and in the second one Image-Based modelling technique is implemented.},

keywords = {Image-Based modelling, Mirrors, Range-based modelling, Small artefacts},

pubstate = {published},

tppubtype = {article}

}