scholarly journals Teknik Pencocokan Citra dalam Fotogrametri untuk Dokumentasi Cagar Budaya

2017 ◽  
Author(s):  
Arnadi Murtiyoso ◽  
Deni Suwardhi
Keyword(s):  
Computer Vision ◽  
Case Studies ◽  
Image Matching ◽  
Laser Scanning ◽  
3D Model ◽  
State Of The Art ◽  
3D Models ◽  
The State ◽  
Software Packages ◽  
Matching Technique

AbstrakDewasa ini teknik pencocokan citra banyak dimanfaatkan dalam fotogrametri. Metode yang berasal dari ranah penglihatan komputer ini dapat mempermudah sejumlah tugas dalam fotogrametri yang sebelumnya harus dikerjakan secara manual. Fotogrametri sendiri merupakan teknik yang sering digunakan dalam dokumentasi cagar budaya dan arkeologi untuk menghasilkan model trimatra (3D). Fotogrametri dapat menjadi alternatif ataupun komplemen dari teknik pemindaian laser dalam menghasilkan model 3D yang akurat. Makalah ini bermaksud merangkum secara umum teknik pencocokan citra otomatis yang banyak digunakan di perangkat lunak fotogrametri modern, dengan menyertakan sejumlah contoh kasus untuk penggunaannya dalam rangka dokumentasi cagar budaya.Kata kunci: Pencocokan Citra, Fotogrametri, Cagar Budaya, Dokumentasi, Model 3D AbstractToday the image matching technique is used extensively in photogrammetry. This method, which originated from the computer vision domain, facilitates several tasks within the photogrammetric workflow which previously had to be performed manually. Photogrammetry itself is a technique which is often employed in the documentation of heritage as well as archaeology in order to create 3D models. Photogrammetry can be an alternative or a complement to laser scanning in producing accurate and reality-based 3D models. This paper will summarize the state of the art of the image matching technique often used in modern photogrammetry software packages. Several case studies of its use in the area of heritage documentation will also be presented.Keywords: Image Matching, Photogrammetry, Heritage, Documentation, 3D Model

scholarly journals GENERATION AND COMPARISON OF TLS AND SFM BASED 3D MODELS OF SOLID SHAPES IN HYDROMECHANIC RESEARCH

2016 ◽  
Vol XLI-B5 ◽  
pp. 925-929
Author(s):  
R. Zhang ◽  
D. Schneider ◽  
B. Strauß
Keyword(s):  
Point Cloud ◽  
Laser Scanning ◽  
3D Model ◽  
Accuracy Assessment ◽  
3D Models ◽  
3D Point Cloud ◽  
Synthetic Material ◽  
Qualitative Comparison ◽  
Software Packages ◽  
Main Influence

The aim of a current study at the Institute of Hydraulic Engineering and Technical Hydromechanics at TU Dresden is to develop a new injection method for quick and economic sealing of dikes or dike bodies, based on a new synthetic material. To validate the technique, an artificial part of a sand dike was built in an experimental hall. The synthetic material was injected, which afterwards spreads in the inside of the dike. After the material was fully solidified, the surrounding sand was removed with an excavator. In this paper, two methods, which applied terrestrial laser scanning (TLS) and structure from motion (SfM) respectively, for the acquisition of a 3D point cloud of the remaining shapes are described and compared. Combining with advanced software packages, a triangulated 3D model was generated and subsequently the volume of vertical sections of the shape were calculated. As the calculation of the volume revealed differences between the TLS and the SfM 3D model, a thorough qualitative comparison of the two models will be presented as well as a detailed accuracy assessment. The main influence of the accuracy is caused by generalisation in case of gaps due to occlusions in the 3D point cloud. Therefore, improvements for the data acquisition with TLS and SfM for such kind of objects are suggested in the paper.

scholarly journals GENERATION AND COMPARISON OF TLS AND SFM BASED 3D MODELS OF SOLID SHAPES IN HYDROMECHANIC RESEARCH

2016 ◽  
Vol XLI-B5 ◽  
pp. 925-929 ◽  
Author(s):  
R. Zhang ◽  
D. Schneider ◽  
B. Strauß
Keyword(s):  
Point Cloud ◽  
Laser Scanning ◽  
3D Model ◽  
Accuracy Assessment ◽  
3D Models ◽  
3D Point Cloud ◽  
Synthetic Material ◽  
Qualitative Comparison ◽  
Software Packages ◽  
Main Influence

The aim of a current study at the Institute of Hydraulic Engineering and Technical Hydromechanics at TU Dresden is to develop a new injection method for quick and economic sealing of dikes or dike bodies, based on a new synthetic material. To validate the technique, an artificial part of a sand dike was built in an experimental hall. The synthetic material was injected, which afterwards spreads in the inside of the dike. After the material was fully solidified, the surrounding sand was removed with an excavator. In this paper, two methods, which applied terrestrial laser scanning (TLS) and structure from motion (SfM) respectively, for the acquisition of a 3D point cloud of the remaining shapes are described and compared. Combining with advanced software packages, a triangulated 3D model was generated and subsequently the volume of vertical sections of the shape were calculated. As the calculation of the volume revealed differences between the TLS and the SfM 3D model, a thorough qualitative comparison of the two models will be presented as well as a detailed accuracy assessment. The main influence of the accuracy is caused by generalisation in case of gaps due to occlusions in the 3D point cloud. Therefore, improvements for the data acquisition with TLS and SfM for such kind of objects are suggested in the paper.

scholarly journals A Benchmark and Evaluation of Non-Rigid Structure from Motion

2020 ◽  
Author(s):  
Sebastian Hoppe Nesgaard Jensen ◽  
Mads Emil Brix Doest ◽  
Henrik Aanæs ◽  
Alessio Del Bue
Keyword(s):  
Computer Vision ◽  
Structure From Motion ◽  
State Of The Art ◽  
The State ◽  
Quality Data ◽  
Data Set ◽  
Rigid Structure ◽  
Public Data ◽  
3D Information ◽  
Further Development

AbstractNon-rigid structure from motion (nrsfm), is a long standing and central problem in computer vision and its solution is necessary for obtaining 3D information from multiple images when the scene is dynamic. A main issue regarding the further development of this important computer vision topic, is the lack of high quality data sets. We here address this issue by presenting a data set created for this purpose, which is made publicly available, and considerably larger than the previous state of the art. To validate the applicability of this data set, and provide an investigation into the state of the art of nrsfm, including potential directions forward, we here present a benchmark and a scrupulous evaluation using this data set. This benchmark evaluates 18 different methods with available code that reasonably spans the state of the art in sparse nrsfm. This new public data set and evaluation protocol will provide benchmark tools for further development in this challenging field.

Understanding the state of the Art in Animal detection and classification using computer vision technologies

2021 ◽  
Author(s):  
Gabriel S. Ferrante ◽  
Felipe M. Rodrigues ◽  
Fernando R. H. Andrade ◽  
Rudinei Goularte ◽  
Rodolfo I. Meneguette
Keyword(s):  
Computer Vision ◽  
State Of The Art ◽  
The State ◽  
Animal Detection

scholarly journals INTEGRATION OF SURVEYING TECHNIQUES TO DETECT THE IDEAL SHAPE OF A DOME: THE CASE OF THE ESCUELAS PÍAS CHURCH IN VALENCIA

2019 ◽  
Vol XLII-2/W9 ◽  
pp. 39-43
Author(s):  
S. Artese ◽  
J. L. Lerma ◽  
J. Aznar Molla ◽  
R. M. Sánchez ◽  
R. Zinno
Keyword(s):  
Laser Scanning ◽  
3D Model ◽  
Three Dimensional ◽  
Historical Building ◽  
Software Packages ◽  
Similarities And Differences ◽  
3D Documentation ◽  
Almost All ◽  
The Church ◽  
The Ideal

<p><strong>Abstract.</strong> The three-dimensional (3D) documentation and surveying of cultural heritage can be carried out following several geomatics techniques such as laser scanning and thermography in order to detect the original 3D shape after applying reverse engineering solutions. In almost all cases, the integration of data collected by different instruments is needed to achieve a successful and comprehensive 3D model of the as-built architectural shape of the historical building. This paper describes the operations carried out by the authors to determine the as-built 3D model of the Escuelas Pias Church, related namely to the dome and circular nave. After the description of the church and historical notes, attention will be driven to the indirect registration results obtained with three different laser scanning software packages, highlighting similarities and differences, and the consequences while generating meshes. The 3D model carried out will then be described and the results of some investigations with regard to the hypotheses about the design of the dome and the origin of the alterations will be presented.</p>

scholarly journals Creation of virtual 3D models of the existing architectonic structures using the web resources

Spatium ◽  
2016 ◽  
pp. 30-36 ◽  
Author(s):  
Petar Pejic ◽  
Sonja Krasic
Keyword(s):  
Laser Scanning ◽  
Three Dimensional ◽  
3D Models ◽  
Three Dimensional Model ◽  
Web Resources ◽  
Existing Structures ◽  
Software Packages ◽  
Physical Presence ◽  
The Creation ◽  
Three Dimensional Models

Digital three-dimensional models of the existing architectonic structures are created for the purpose of digitalization of the archive documents, presentation of buildings or an urban entity or for conducting various analyses and tests. Traditional methods for the creation of 3D models of the existing buildings assume manual measuring of their dimensions, using the photogrammetry method or laser scanning. Such approaches require considerable time spent in data acquisition or application of specific instruments and equipment. The goal of this paper is presentation of the procedure for the creation of 3D models of the existing structures using the globally available web resources and free software packages on standard PCs. This shortens the time of the production of a digital three-dimensional model of the structure considerably and excludes the physical presence at the location. In addition, precision of this method was tested and compared with the results acquired in a previous research.

Low Cost Methods Used to Create 3D Models

2017 ◽  
Author(s):  
Agnieszka Chmurzynska ◽  
Karolina Hejbudzka ◽  
Andrzej Dumalski
Keyword(s):  
Laser Scanning ◽  
3D Model ◽  
Low Cost ◽  
3D Models ◽  
3D Modelling ◽  
Kinect Sensor ◽  
Applied Technology ◽  
Gaming Environment

During the last years the softwares and applications that can produce 3D models using low-cost methods have become very popular. What is more, they can be successfully competitive with the classical methods. The most wellknown and applied technology used to create 3D models has been laser scanning so far. However it is still expensive because of the price of the device and software. That is why the universality and accessibility of this method is very limited. Hence, the new low cost methods of obtaining the data needed to generate 3D models appeare on the market and creating 3D models have become much easier and accessible to a wider group of people. Because of their advantages they can be competitive with the laser scanning. One of the methods uses digital photos to create 3D models. Available software allows us to create a model and object geometry. Also very popular in the gaming environment device – Kinect Sensor can be successfully used as a different method to create 3D models. This article presents basic issues of 3D modelling and application of various devices, which are commonly used in our life and they can be used to generate a 3D model as well. Their results are compared with the model derived from the laser scanning. The acquired results with graphic presentations and possible ways of applications are also presented in this paper.

scholarly journals Virtual realities and education

2016 ◽  
Vol 8 (2) ◽  
pp. 60-68 ◽  
Author(s):  
Igor D.D. Curcio ◽  
Anna Dipace ◽  
Anita Norlund
Keyword(s):  
Virtual Reality ◽  
Augmented Reality ◽  
Case Studies ◽  
Virtual Environment ◽  
Formal Education ◽  
Mixed Reality ◽  
State Of The Art ◽  
Theoretical Framework ◽  
The State ◽  
Virtual Realities

Abstract The purpose of this article is to highlight the state of the art of virtual reality, augmented reality, mixed reality technologies and their applications in formal education. We also present a selected list of case studies that prove the utility of these technologies in the context of formal education. Furthermore, as byproduct, the mentioned case studies show also that, although the industry is able to develop very advanced virtual environment technologies, their pedagogical implications are strongly related to a well-designed theoretical framework.

scholarly journals Automated Multi-Sensor 3D Reconstruction for the Web

2019 ◽  
Vol 8 (5) ◽  
pp. 221 ◽  
Author(s):  
Arttu Julin ◽  
Kaisa Jaalama ◽  
Juho-Pekka Virtanen ◽  
Mikko Maksimainen ◽  
Matti Kurkela ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Production Efficiency ◽  
State Of The Art ◽  
Real Life ◽  
3D Models ◽  
Life Project ◽  
Close Range ◽  
High Degree ◽  
The Web ◽  
3D Content

The Internet has become a major dissemination and sharing platform for 3D content. The utilization of 3D measurement methods can drastically increase the production efficiency of 3D content in an increasing number of use cases where 3D documentation of real-life objects or environments is required. We demonstrated a developed, highly automated and integrated content creation process of providing reality-based photorealistic 3D models for the web. Close-range photogrammetry, terrestrial laser scanning (TLS) and their combination are compared using available state-of-the-art tools in a real-life project setting with real-life limitations. Integrating photogrammetry and TLS is a good compromise for both geometric and texture quality. Compared to approaches using only photogrammetry or TLS, it is slower and more resource-heavy but combines complementary advantages of each method, such as direct scale determination from TLS or superior image quality typically used in photogrammetry. The integration is not only beneficial, but clearly productionally possible using available state-of-the-art tools that have become increasingly available also for non-expert users. Despite the high degree of automation, some manual editing steps are still required in practice to achieve satisfactory results in terms of adequate visual quality. This is mainly due to the current limitations of WebGL technology.

scholarly journals 4D printing – revolution or fad?

2014 ◽  
Vol 34 (2) ◽  
pp. 123-127 ◽  
Author(s):  
Eujin Pei
Keyword(s):  
Case Studies ◽  
Smart Materials ◽  
State Of The Art ◽  
The State ◽  
Additive Manufacture ◽  
4D Printing ◽  
Content Type ◽  
Potential Applications ◽  
Manufacturing Technologies ◽  
Review State

Purpose – This feature article aims to review state-of-the-art developments in additive manufacture, in particular, 4D printing. It discusses what it is, what research has been carried out and maps potential applications and its future impact. Design/methodology/approach – The article first defines additive manufacturing technologies and goes on to describe the state-of-the-art. Following which the paper examines several case studies and maps a trend that shows an emergence of 4D printing. Findings – The case studies highlight a particular specialization within additive manufacture where the use of adaptive, biomimetic composites can be programmed to reshape, or have embedded properties or functionality that transform themselves when subjected to external stimuli. Originality/value – This paper discusses the state-of-the-art of additive manufacture, discussing strategies that can be used to reduce the print process (such as through kinematics); and the use of smart materials where parts adapt themselves in response to the surrounding environment supporting the notion of self-assemblies.

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