Use of Image Based Modelling for Documentation of Intricately Shaped Objects

Abstract

ABSTRACT:In the documentation of cultural heritage, we can encounter three dimensional shapes and structures which are complicated to measure. Such objects are for example spiral staircases, timber roof trusses, historical furniture or folk costume where it is nearly impossible to effectively use the traditional surveying or the terrestrial laser scanning due to the shape of the object, its dimensions and the crowded environment. The actual methods of digital photogrammetry can be very helpful in such cases with the emphasis on the automated processing of the extensive image data. The created high resolution 3D models and 2D orthophotos are very important for the documentation of architectural elements and they can serve as an ideal base for the vectorization and 2D drawing documentation. This contribution wants to describe the various usage of image based modelling in specific interior spaces and specific objects. The advantages and disadvantages of the photogrammetric measurement of such objects in comparison to other surveying methods are reviewed.

Measurement of spatio-temporal changes of cave ice using geodetic and geophysical methods: Dobšiná Ice Cave, Slovakia

“…This is also the case with the artificial tunnel in Dobšinská Ice Cave . In order to be able to suppress reflections and refractions of light from the ice surface and thus use the SfM photogrammetry, we proposed to apply a cross-polarized photogrammetry (Wells et al, 2005;Edwards, 2011;Conen et al, 2018;Marčiš et al, 2018). This encompasses a polarized light source (stronger than other sources or the only source of illumination in the cave), in our case, a polarizing sheet attached directly to a DSLR camera flash, and a second polarizing filter attached to the DSLR camera lens.…”

Using of modern technologies for visualization of cultural heritage

“…Subsequently, neglect and severe climatic conditions led to rapid deterioration of the monument, resulting in the collapse of sections of its exterior masonry. The interior became a refuge for local herds as the surrounding area transformed into pastureland 3 , 4 .…”

“…Aerial photogrammetry continued to evolve, with the introduction of satellite imagery in the 1970s providing a new dimension to large-scale mapping and environmental monitoring [2,3]. The late 20th century and early 21st century brought about a digital revolution in photogrammetry, with the shift from analogue film to digital sensors, and the development of sophisticated software for image processing and 3D modelling [4,5,6]. Unmanned Aerial Vehicles (UAVs) or drones became popular tools for photogrammetric documentation in the 21st century, offering a cost-effective and flexible means to capture high-resolution images for mapping and 3D reconstruction [7,8].…”

“…High-resolution imagery obtained through photogrammetry allows for the detailed documentation of intricate features on artefacts, architectural elements, or artworks, facilitating scholarly analysis and research. Photogrammetry has become an integral part of interdisciplinary collaborations in cultural heritage, fostering connections between archaeologists, historians, conservators, and technologists for comprehensive documentation and analysis [3,4]. Laser scanning has become an important technology in the documentation of cultural heritage.…”

Photogrammetric Measurement of a Wooden Truss

“…Examples of the usability of automated image-based modelling of wooden trusses are mentioned by (Marčiš et al, 2016). The point clouds and meshes generated were used for the creation of orthophotomosaics and the documentation of various historical buildings through 2D layouts.…”