Suitability of Automatic Photogrammetric Reconstruction Configurations for Small Archaeological Remains

Abstract

Three-dimensional (3D) reconstruction is a useful technique for the documentation, characterization, and evaluation of small archeological objects. In this research, a comparison among different photogrammetric setups that use different lenses (macro and standard zoom) and dense point cloud generation calibration processes for real specific objects of archaeological interest with different textures, geometries, and materials is raised using an automated data collection. The data acquisition protocol is carried out from a platform with control points referenced with a metrology absolute arm to accurately define a common spatial reference system. The photogrammetric reconstruction is performed considering a camera pre-calibration as well as a self-calibration. The latter is common for most data acquisition situations in archaeology. The results for the different lenses and calibration processes are compared based on a robust statistical analysis, which entails the estimation of both standard Gaussian and non-parametric estimators, to assess the accuracy potential of different configurations. As a result, 95% of the reconstructed points show geometric discrepancies lower than 0.85 mm for the most unfavorable case and less than 0.35 mm for the other cases.

Twelve-Year Analysis of NO2 Concentration Measurements at Belisario Station (Quito, Ecuador) Using Statistical Inference Techniques

“…Furthermore, some of the robust statistical methods used in the research presented in this paper were also used in [ 23 ] to compare results obtained in [ 23 ] for different lenses and calibration processes, in a three-dimensional reconstruction problem of archeological remains. Moreover, robust linear regression was also used in [ 24 ] to estimate black carbon concentration in two sites in Helsinki, Finland.…”

Protocol Development for Point Clouds, Triangulated Meshes and Parametric Model Acquisition and Integration in an HBIM Workflow for Change Control and Management in a UNESCO’s World Heritage Site

“…This fact has created a very interesting residential architecture with vaulted houses that combine different structures from different times [ 26 ] including the military structures among them the XII century Almohad Wall or the 19th century adobe walls. The SfM acquisition was aimed to optimize the movement of the DSLR (digital single lens reflex) camera to generate chunks of high-density points and integrity of each surface [ 27 , 28 , 29 ].…”

Architectural Survey, Diagnostic, and Constructive Analysis Strategies for Monumental Preservation of Cultural Heritage and Sustainable Management of Tourism

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