scholarly journals Creation of a dynamic three-dimensional model by “Structure from Motion” from multiple full HD movies of a full-scale shaking table test

2015 ◽  
Vol 15 (7) ◽  
pp. 7_316-7_323
Author(s):  
Shoichiro UCHIYAMA ◽  
Hiroshi INOUE ◽  
Hiroshi IMAI
Keyword(s):  
Structure From Motion ◽  
Shaking Table Test ◽  
Three Dimensional ◽  
Full Scale ◽  
Shaking Table ◽  
Dimensional Model ◽  
Three Dimensional Model

scholarly journals Survey Solutions for 3D Acquisition and Representation of Artificial and Natural Caves

2021 ◽  
Vol 11 (14) ◽  
pp. 6482
Author(s):  
Daniele Giordan ◽  
Danilo Godone ◽  
Marco Baldo ◽  
Marco Piras ◽  
Nives Grasso ◽  
...  
Keyword(s):  
High Resolution ◽  
Structure From Motion ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Dimensional Model ◽  
Low Resolution ◽  
Three Dimensional Model ◽  
Photo Camera ◽  
3D Acquisition ◽  
Definition Of

A three-dimensional survey of natural caves is often a difficult task due to the roughness of the investigated area and the problems of accessibility. Traditional adopted techniques allow a simplified acquisition of the topography of caves characterized by an oversimplification of the geometry. Nowadays, the advent of LiDAR and Structure from Motion applications eased three-dimensional surveys in different environments. In this paper, we present a comparison between other three-dimensional survey systems, namely a Terrestrial Laser Scanner, a SLAM-based portable instrument, and a commercial photo camera, to test their possible deployment in natural caves survey. We presented a comparative test carried out in a tunnel stretch to calibrate the instrumentation on a benchmark site. The choice of the site is motivated by its regular geometry and easy accessibility. According to the result obtained in the calibration site, we presented a methodology, based on the Structure from Motion approach that resulted in the best compromise among accuracy, feasibility, and cost-effectiveness, that could be adopted for the three-dimensional survey of complex natural caves using a sequence of images and the structure from motion algorithm. The methods consider two different approaches to obtain a low resolution complete three-dimensional model of the cave and ultra-detailed models of most peculiar cave morphological elements. The proposed system was tested in the Gazzano Cave (Piemonte region, Northwestern Italy). The obtained result is a three-dimensional model of the cave at low resolution due to the site’s extension and the remarkable amount of data. Additionally, a peculiar speleothem, i.e., a stalagmite, in the cave was surveyed at high resolution to test the proposed high-resolution approach on a single object. The benchmark and the cave trials allowed a better definition of the instrumentation choice for underground surveys regarding accuracy and feasibility.

Three-Dimensional Model for Virtual Surgical Simulation, during Complex Skull Base Surgery and Aneurysm Surgery

Skull Base ◽  
2008 ◽  
Vol 18 (S 01) ◽  
Author(s):  
Akio Morita ◽  
Toshikazu Kimura ◽  
Shigeo Sora ◽  
Kengo Nishimura ◽  
Hisayuki Sugiyama ◽  
...  
Keyword(s):  
Skull Base ◽  
Surgical Simulation ◽  
Skull Base Surgery ◽  
Three Dimensional ◽  
Aneurysm Surgery ◽  
Dimensional Model ◽  
Three Dimensional Model
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