scholarly journals 3D Thermal Imaging System with Decoupled Acquisition for Industrial and Cultural Heritage Applications

2020 ◽  
Vol 10 (3) ◽  
pp. 828 ◽  
Author(s):  
Ivo Campione ◽  
Francesca Lucchi ◽  
Nicola Santopuoli ◽  
Leonardo Seccia
Keyword(s):  
Cultural Heritage ◽  
Spatial Data ◽  
Imaging System ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Large Set ◽  
Marble Statue ◽  
Geometrical Data ◽  
3D Printed ◽  
Thermal Imaging System

Three-dimensional thermography is a recent technique—with various fields of application—that consists of combining thermography with 3D spatial data in order to obtain 3D thermograms, high information objects that allow one to overcome some limitations of 2D thermograms, to enhance the thermal monitoring and the detection of abnormalities. In this paper we present an integration methodology that can be applied to merge data acquired from a generic thermal camera and a generic laser scanner, and has the peculiarity of keeping the two devices completely decoupled and independent, so that thermal and geometrical data can be acquired at different times and no rigid link is needed between the two devices. In this way, the stand-alone capability of each device is not affected, and the data fusion is applied only when necessary. In the second part, the real effectiveness of our approach is tested on a 3D-printed object properly designed. Furthermore, one example of an application of our methodology in the cultural heritage field is presented, with an eye to preservation and restoration: the integration is applied to a marble statue called Madonna with the Child, a fine work of the Florentine sculptor Agostino di Duccio (1418–1481). The results suggest that the method can be successfully applicable to a large set of scenarios. However, additional tests are needed to improve the robustness.

scholarly journals A STUDY ON PLANNING AND PLATFORM FOR INTERACTIVE EXHIBITION OF SCIENTIFIC CULTURAL HERITAGE

2019 ◽  
Vol XLII-2/W15 ◽  
pp. 605-607
Author(s):  
Y. H. Jo ◽  
J. Kim ◽  
N. C. Cho ◽  
C. H. Lee ◽  
Y. H. Yun ◽  
...  
Keyword(s):  
3D Printing ◽  
Cultural Heritage ◽  
Three Dimensional ◽  
Conservation Science ◽  
Scientific Content ◽  
Projection Mapping ◽  
Digital Database ◽  
3D Effects ◽  
3D Printed ◽  
Bronze Mirrors

<p><strong>Abstract.</strong> This study has developed an experiential exhibition system of scientific cultural heritage through interactive projection mapping. A bronze mirror with fine linear design was selected as an exhibition subject considering the intuitiveness and responsiveness of research and development results. First, three-dimensional (3D) scanning was performed to construct a digital database of the original forms, and computer graphics-based 3D modeling was also performed to build exhibition materials and 3D printed objects. Furthermore, objective scenarios were created based on a traditional science experience, understanding the present bronze mirror, and processes of restoring the corroded original bronze mirror through modern conservation science. The technique selected to implement the scientific content of bronze mirror as media art in this study is interactive projection mapping. Moreover, a large 3D printing of bronze mirror was installed at the center of the exhibition space to allow users and all viewers to concurrently engage in scientific cultural heritage content. Simultaneous projection mapping on the front and rear of the printed bronze mirror model enhanced 3D effects and the immersion of the content. To construct an interactive space connecting the virtual and reality, ore, mold, bronze mirror replicas, 3D printing outputs, and cultural products used in the process of producing bronze mirrors were exhibited to make the exhibit more intuitive for visitors. This interactive projection mapping-based scientific and cultural exhibition of the bronze mirror is an experiential exhibition system which combines traditional science, modern conservation science, and future exhibition technology.</p>

scholarly journals REPLICAS IN CULTURAL HERITAGE: 3D PRINTING AND THE MUSEUM EXPERIENCE

2018 ◽  
Vol XLII-2 ◽  
pp. 55-62 ◽  
Author(s):  
M. Ballarin ◽  
C. Balletti ◽  
P. Vernier
Keyword(s):  
3D Printing ◽  
Cultural Heritage ◽  
Laser Scanner ◽  
Original Data ◽  
Digital Data ◽  
Physical Representation ◽  
Museum Exhibitions ◽  
3D Printed ◽  
Museum Experience ◽  
Partially Sighted

3D printing has seen a recent massive diffusion for several applications, not least the field of Cultural Heritage. Being used for different purposes, such as study, analysis, conservation or access in museum exhibitions, 3D printed replicas need to undergo a process of validation also in terms of metrical precision and accuracy.<br> The Laboratory of Photogrammetry of Iuav University of Venice has started several collaborations with Italian museum institutions firstly for the digital acquisition and then for the physical reproduction of objects of historical and artistic interest. The aim of the research is to analyse the metric characteristics of the printed model in relation to the original data, and to optimize the process that from the survey leads to the physical representation of an object. In fact, this could be acquired through different methodologies that have different precisions (multi-image photogrammetry, TOF laser scanner, triangulation based laser scanner), and it always involves a long processing phase. It should not be forgotten that the digital data have to undergo a series of simplifications, which, on one hand, eliminate the noise introduced by the acquisition process, but on the other one, they can lead to discrepancies between the physical copy and the original geometry. In this paper we will show the results obtained on a small archaeological find that was acquired and reproduced for a museum exhibition intended for blind and partially sighted people.

scholarly journals TRIANGULATION AND TIME-OF-FLIGHT BASED 3D DIGITISATION TECHNIQUES OF CULTURAL HERITAGE STRUCTURES

2021 ◽  
Vol XLIII-B2-2021 ◽  
pp. 825-830
Author(s):  
C. Altuntas
Keyword(s):  
Cultural Heritage ◽  
Laser Scanning ◽  
Low Cost ◽  
Measurement Techniques ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Time Of Flight ◽  
Cost Effective ◽  
Cloud Data ◽  
Dense Point

Abstract. This study aims to introduce triangulation and ToF measurement techniques used in three-dimensional modelling of cultural heritages. These measurement techniques are traditional photogrammetry, SfM approach, laser scanning and time-of-flight camera. The computer based approach to photogrammetric measurement that is named SfM creates dense point cloud data in a short time. It is low-cost and very easy to application. However traditional photogrammetry needs a huge effort for creating 3D wire-frame model. On the other hand active measurement techniques such as terrestrial laser scanner and time-of-flight camera have also been used in three-dimensional modelling for more than twenty years. Each one has specific accuracy and measurement effectiveness. The large or small structures have different characters, and require proper measurement configurations. In this study, after these methods are introduced, their superior and weak properties in cultural heritage modelling to make high accuracy, high density and labour and cost effective measurement.

scholarly journals 3D MODELING FOR UNDERWATER ARCHAEOLOGICAL DOCUMENTATION: METRIC VERIFICATIONS

2015 ◽  
Vol XL-5/W5 ◽  
pp. 73-77
Author(s):  
S. D’Amelio ◽  
V. Maggio ◽  
B. Villa
Keyword(s):  
Cultural Heritage ◽  
3D Modeling ◽  
Video Sequence ◽  
Reference Model ◽  
Comparative Method ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Underwater Environment

The survey in underwater environment has always presented considerable difficulties both operative and technical and this has sometimes made it difficult to use the techniques of survey commonly used for the documentation of Cultural Heritage in dry environment. The work of study concerns the evaluation in terms of capability and accuracy of the Autodesk123DCatch software for the reconstruction of a three-dimensional model of an object in underwater context. The subjects of the study are models generated from sets of photographs and sets of frames extracted from video sequence. The study is based on comparative method, using a reference model, obtained with laser scanner technique.

scholarly journals Printing special surface components for THz 2D and 3D imaging

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Bo Yan ◽  
Zhigang Wang ◽  
Xing Zhao ◽  
Lie Lin ◽  
Xiaolei Wang ◽  
...  
Keyword(s):  
Imaging System ◽  
Incident Light ◽  
Optical Design ◽  
Bessel Beam ◽  
Three Dimensional ◽  
Focal Depth ◽  
Traditional System ◽  
Special Surface ◽  
3D Printed ◽  
Aspherical Mirrors

AbstractThe paper reports an off-axis large focal depth THz imaging system which consists of three 3D printed special surface components (two aspherical mirrors and an axicon). Firstly, the optical design software is used to design and optimize the aspherical parabolic mirror. Secondly, the optimized mirror is prepared by a 3D printing and metal cladding method. Thirdly, a THz axicon is designed for generation of quasi-Bessel Beam and a new geometric theoretical model of oblique incident light for axicon is established. Finally, the imaging system based on the special surface components is constructed. Its maximum diffraction-free distance is about 60 mm, which is 6 times higher than the traditional system. To verify the effectiveness, THz two-dimensional imaging experiments and three-dimensional computed tomography experiment are carried out. The results are consistent with the design and calculations.

The Research and Application of System for Paper Surface Morphology Stereoscopic Observation and Characterization

2021 ◽  
Vol 29 (Supp01) ◽  
pp. 89-100
Author(s):  
Haozhi Chen ◽  
Tingli Liu ◽  
Guangxue Chen
Keyword(s):  
Surface Morphology ◽  
Point Cloud ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Observation System ◽  
Point Cloud Data ◽  
Paper Surface ◽  
Cloud Data ◽  
Stereoscopic Observation ◽  
3D Printed

The work aims to explore a microscopic observation system of paper surface and achieve high-precision stereoscopic observation with detail characterization of paper surface morphology. Based on the DT-400E precision program-controlled three-dimensional translation stage and KEYENCE LJV-7200 two-dimensional laser scanner, the hardware parts of our own system are developed to scan and transmit point cloud data of paper surface morphology to the computer. The corresponding system software will automatically process the point cloud data acquired from the laser scanner and generate the corresponding vivid 3D model and height histogram. This system scans and characterizes four different types of paper samples, allowing the human eye to visually distinguish the differences in surface morphology as well as automatically calculate the numerical differences in paper surface morphology parameters. The results of the applicability test show that the system is highly efficient in acquiring, observing, and evaluating the topography of the paper surface. The system can not only predict the paper surface quality of printed paper, but can also be extended to the evaluation of 3D printed surfaces.

Realization of the 3D Simulation Model of the Hui-Quan Substation

2012 ◽  
Vol 529 ◽  
pp. 195-199
Author(s):  
Qiu Long Liu ◽  
Wu Sheng Hu
Keyword(s):  
Spatial Data ◽  
Laser Scanning ◽  
3D Visualization ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Target Surface ◽  
Spatial Location ◽  
Dynamic Visualization ◽  
Three Dimensional Model ◽  
Object A

3D (three-dimensional) laser scanning can be used to collect spatial location of points rapidly and abundantly, and obtain three-dimensional coordinates of the target surface, which provides new technical means for the rapid creation of three-dimensional image model of the object. A three-dimensional modeling study on spatial object was carried out using the spatial data captured via ground-based 3D laser scanner in the Hui-Quan substation. The experiment result shows that rapid 3D visualization modeling on buildings can be achieved via the methods and procedures mentioned above. It has solved that the traditional equipment and the measuring technique is insufficiency in the special domain. It will bring the application mode and technical advantage, which tradition mapping way can not have. A platform for three-dimensional model of the substation can be achieved for the resources, landscape, security, environmental management and other social resources of digital, networked and dynamic visualization.

Three Dimensional Thermal Effects in MEMS Devices

2001 ◽  
Vol 687 ◽  
Author(s):  
Edward Van Keuren ◽  
John Currie ◽  
Matthew Nelson ◽  
Makarand Paranjape ◽  
Thomas Schneider ◽  
...  
Keyword(s):  
Temperature Profile ◽  
Thermal Imaging ◽  
Imaging System ◽  
Three Dimensional ◽  
Skin Layer ◽  
Chemical Imaging ◽  
Analytical Models ◽  
Mems Devices ◽  
Pdms Microchannel ◽  
Thermal Imaging System

AbstractA three dimensional thermal imaging system is being developed for measuring temperature profiles in MEMS-biomedical devices. These devices rely on a thermal microablation of the dead-skin layer in order to sample transdermal fluids. This is accomplished using microheaters embedded into a PDMS microchannel device. In order to determine the proper functioning as well as long-term safety of the devices, a temperature profile of the device and the skin in contact with the heaters is needed. The results of simple analytical models are used to optimize a proto- type device. Using a three-dimensional chemical imaging microscope and temperature-depend- ent fluorophores, the temperature profile in a sample can be determined quantitatively as well. We demonstrate the technique on a model sample, and discuss extension to other applications such as thermal imaging in biological systems.

scholarly journals Remote Colorimetric and Structural Diagnosis by RGB-ITR Color Laser Scanner Prototype

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Massimiliano Guarneri ◽  
Mario Ferri de Collibus ◽  
Giorgio Fornetti ◽  
Massimo Francucci ◽  
Marcello Nuvoli ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Avalanche Photodiodes ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Systems Development ◽  
Artificial Vision ◽  
Remote Diagnosis ◽  
Laser Sources ◽  
Structural Diagnosis

Since several years ENEA's Artificial Vision laboratory is involved in electrooptics systems development. In the last period the efforts are concentrated on cultural heritage remote diagnosis, trying to develop instruments suitable for multiple purposes concerning restoration, cataloguing, and education. Since last five years a new 3D (three-dimensional) laser scanner prototype (RGB-ITR) based on three amplitude-modulated monochromatic laser sources mixed together by dichroic filters is under development. Five pieces of information per each sampled point (pixel) are collected by three avalanche photodiodes and dedicated electronics: two distances and three target reflectivity signals for each channel, red, green, and blue. The combination of these pieces of information opens new scenarios for remote colorimetry allowing diagnoses without the use of scaffolds. Results concerning the use of RGB-ITR as colorimeter are presented.

scholarly journals DIGITAL SURVEY TECHNIQUES FOR THE DOCUMENTATION OF WOODEN SHIPWRECKS

2016 ◽  
Vol XLI-B5 ◽  
pp. 237-242 ◽  
Author(s):  
E. Costa ◽  
C. Balletti ◽  
C. Beltrame ◽  
F. Guerra ◽  
P. Vernier
Keyword(s):  
Cultural Heritage ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Point Clouds ◽  
Point Of View ◽  
Principal Type ◽  
Recording Technique ◽  
Survey Techniques ◽  
Roman Age ◽  
Digital Survey

Nowadays, researchers widely employ the acquisition of point clouds as one of the principal type of documentation for cultural heritage. In this paper, different digital survey techniques are employed to document a wooden ancient shipwreck, a particular and difficult kind of archaeological finding due to its material characteristics. The instability of wood and the high costs of restoration do not always offer the opportunity of recovering and showing the hull to researchers and public and three-dimensional surveys are fundamental to document the original conditions of the wood. The precarious conditions of this material in contact with air could modify the structure and the size of the boat, requiring a fast and accurate recording technique. The collaboration between Ca' Foscari University and the Laboratory of Photogrammetry of Iuav University of Venice has given the possibility to demonstrate the utility of these technology. We have surveyed a sewn boat of Roman age through multi-image photogrammetry and laser scanner. Point clouds were compared and a residual analysis was done, to verify the characteristics and the opportunity of the two techniques, both of them have allowed obtaining a very precise documentation from a metrical point of view.

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