scholarly journals Elementary Methods for Generating Three-Dimensional Coordinate Estimation and Image Reconstruction from Series of Two-Dimensional Images

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Naived George Eapen ◽  
Debabrata Samanta ◽  
Manjit Kaur ◽  
Jehad F. Al-Amri ◽  
Mehedi Masud
Keyword(s):  
Spatial Representation ◽  
Three Dimensional ◽  
Computational Power ◽  
Image Processing Techniques ◽  
The Past ◽  
Elementary Methods ◽  
Three Dimensional Models ◽  
Three Dimensional Coordinate ◽  
Dimensional Object ◽  
Processing Techniques

The increase in computational power in recent years has opened a new door for image processing techniques. Three-dimensional object recognition, identification, pose estimation, and mapping are becoming popular. The need for real-world objects to be mapped into three-dimensional spatial representation is greatly increasing, especially considering the heap jump we obtained in the past decade in virtual reality and augmented reality. This paper discusses an algorithm to convert an array of captured images into estimated 3D coordinates of their external mappings. Elementary methods for generating three-dimensional models are also discussed. This framework will help the community in estimating three-dimensional coordinates of a convex-shaped object from a series of two-dimension images. The built model could be further processed for increasing the resemblance of the input object in terms of its shapes, contour, and texture.

Three-Dimensional Structure of Rotavirus-Fab Complex

1990 ◽  
Vol 48 (1) ◽  
pp. 238-239
Author(s):  
B.V.V. Prasad ◽  
E. Marietta ◽  
J.W. Burns ◽  
M.K. Estes ◽  
W. Chiu
Keyword(s):  
Image Processing ◽  
Smooth Surface ◽  
Three Dimensional ◽  
Outer Shell ◽  
Dimensional Structure ◽  
Structural Studies ◽  
Cell Penetration ◽  
Electron Cryomicroscopy ◽  
Image Processing Techniques ◽  
Processing Techniques

Rotaviruses are spherical, double-shelled particles. They have been identified as a major cause of infantile gastroenteritis worldwide. In our earlier studies we determined the three-dimensional structures of double-and single-shelled simian rotavirus embedded in vitreous ice using electron cryomicroscopy and image processing techniques to a resolution of 40Å. A distinctive feature of the rotavirus structure is the presence of 132 large channels spanning across both the shells at all 5- and 6-coordinated positions of a T=13ℓ icosahedral lattice. The outer shell has 60 spikes emanating from its relatively smooth surface. The inner shell, in contrast, exhibits a bristly surface made of 260 morphological units at all local and strict 3-fold axes (Fig.l).The outer shell of rotavirus is made up of two proteins, VP4 and VP7. VP7, a glycoprotein and a neutralization antigen, is the major component. VP4 has been implicated in several important functions such as cell penetration, hemagglutination, neutralization and virulence. From our earlier studies we had proposed that the spikes correspond to VP4 and the rest of the surface is composed of VP7. Our recent structural studies, using the same techniques, with monoclonal antibodies specific to VP4 have established that surface spikes are made up of VP4.

scholarly journals Integrating Digital Datasets into Public Engagement through ArcGIS StoryMaps

2020 ◽  
Vol 8 (4) ◽  
pp. 351-360
Author(s):  
Matthew D. Howland ◽  
Brady Liss ◽  
Thomas E. Levy ◽  
Mohammad Najjar
Keyword(s):  
Iron Age ◽  
Public Engagement ◽  
Three Dimensional ◽  
First Century ◽  
Copper Production ◽  
The Public ◽  
The Past ◽  
Archaeological Methods ◽  
Three Dimensional Models

AbstractArchaeologists have a responsibility to use their research to engage people and provide opportunities for the public to interact with cultural heritage and interpret it on their own terms. This can be done through hypermedia and deep mapping as approaches to public archaeology. In twenty-first-century archaeology, scholars can rely on vastly improved technologies to aid them in these efforts toward public engagement, including digital photography, geographic information systems, and three-dimensional models. These technologies, even when collected for analysis or documentation, can be valuable tools for educating and involving the public with archaeological methods and how these methods help archaeologists learn about the past. Ultimately, academic storytelling can benefit from making archaeological results and methods accessible and engaging for stakeholders and the general public. ArcGIS StoryMaps is an effective tool for integrating digital datasets into an accessible framework that is suitable for interactive public engagement. This article describes the benefits of using ArcGIS StoryMaps for hypermedia and deep mapping–based public engagement using the story of copper production in Iron Age Faynan, Jordan, as a case study.

Real-Time Analysis of Human Body Parts and Gesture-Activity Recognition in 3D

2011 ◽  
pp. 130-174
Author(s):  
Burak Ozer ◽  
Tiehan Lv ◽  
Wayne Wolf
Keyword(s):  
Real Time ◽  
Activity Recognition ◽  
Visual Processing ◽  
Visual Analysis ◽  
Three Dimensional ◽  
Real Time Processing ◽  
Visual Reconstruction ◽  
Three Dimensional Models ◽  
Main Components ◽  
Processing Techniques

This chapter focuses on real-time processing techniques for the reconstruction of visual information from multiple views and its analysis for human detection and gesture and activity recognition. It presents a review of the main components of three-dimensional visual processing techniques and visual analysis of multiple cameras, i.e., projection of three-dimensional models onto two-dimensional images and three-dimensional visual reconstruction from multiple images. It discusses real-time aspects of these techniques and shows how these aspects affect the software and hardware architectures. Furthermore, the authors present their multiple-camera system to investigate the relationship between the activity recognition algorithms and the architectures required to perform these tasks in real time. The chapter describes the proposed activity recognition method that consists of a distributed algorithm and a data fusion scheme for two and three-dimensional visual analysis, respectively. The authors analyze the available data independencies for this algorithm and discuss the potential architectures to exploit the parallelism resulting from these independencies.

Multi-perspective measurement of yarn hairiness using mirrored images

2016 ◽  
Vol 88 (6) ◽  
pp. 621-629 ◽  
Author(s):  
Lei Wang ◽  
Bugao Xu ◽  
Weidong Gao
Keyword(s):  
3D Model ◽  
Three Dimensional ◽  
Digital Camera ◽  
3D Measurement ◽  
Multiple Perspectives ◽  
Multiple Images ◽  
Image Processing Techniques ◽  
Yarn Hairiness ◽  
Processing Techniques ◽  
Planar Mirrors

Most photoelectric and imaging methods for yarn hairiness measurements often provide underestimated data of hairy fibers measured from light projection, which ignores the spatial orientations and shapes of protruding fibers. In this project, a three-dimensional (3D) system was developed to detect hairy fibers from multiple perspectives and to reconstruct a 3D model for the yarn that permits fibers to be traced spatially. The system utilized two angled planar mirrors to view a yarn from five different perspectives simultaneously, and a digital camera to capture the multiple images in one panoramic picture. The image-processing techniques were used to dissect the panoramic picture into five sub-images containing separate views of the yarn, and to segment the sub-images to obtain yarn silhouettes showing the edges of the yarn and hairy fibers. A 3D model of the yarn could be built by merging the five silhouettes with the angles defined by the scene geometry of the dual mirrors. From the 3D model, hairy fibers protruding from the yarn core could be traced in the space for accurate length measurements. The system represents a simple and practical solution for the 3D measurement of yarn hairiness.

Parts and Wholes: Reduction Allometry and Modularity in Experimental Folsom Points

2021 ◽  
pp. 1-20
Author(s):  
Michael J. Shott ◽  
Erik Otárola-Castillo
Keyword(s):  
Geometric Morphometrics ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Progressive Reduction ◽  
Experimental Control ◽  
Projectile Points ◽  
The Past ◽  
Dimensional Models ◽  
Three Dimensional Models

Projectile points are a common subject of archaeological study. In the past decade, landmark-based geometric morphometrics (LGM) has increasingly been used to analyze points as whole objects. LGM and other studies document allometric changes in points—change in shape with change in size—as a product of resharpening. Allometry registers in part because different segments or modules of points are subject to different degrees of resharpening, with blades often experiencing more reduction than stems. Different modules retain varying degrees of morphological integrity as points move through their use lives. Most previous LGM studies involved two-dimensional point models, and few tested directly for modularity. We apply LGM methods to three-dimensional models of Folsom point replicas whose degree and pattern of reduction are known, finding evidence for both allometry and modularity, with modest integration. Complementary non-LGM data reveal similar results, indicating a robust pattern and ways to approximate LGM results in other data. Moreover, our dataset's experimental control clearly identifies the results as a function of the progressive reduction in use experienced by points.

Three-dimensional systolic kinematics of the right ventricle

2005 ◽  
Vol 289 (5) ◽  
pp. H1826-H1833 ◽  
Author(s):  
Idith Haber ◽  
Dimitris N. Metaxas ◽  
Tal Geva ◽  
Leon Axel
Keyword(s):  
Right Ventricle ◽  
Three Dimensional ◽  
Normal Subjects ◽  
Local Deformation ◽  
Thin Wall ◽  
Image Processing Techniques ◽  
Strain Pattern ◽  
The Right ◽  
Processing Techniques ◽  
Global And Local

The right ventricle (RV) of the heart is responsible for pumping blood to the lungs. Its kinematics are not as well understood as that of the left ventricle (LV) due to its thin wall and asymmetric geometry. In this study, the combination of tagged MRI and three-dimensional (3-D) image-processing techniques was used to reconstruct 3-D RV-LV motion and deformation. The reconstructed models were used to quantify the 3-D global and local deformation of the ventricles in a set of normal subjects. When compared with the LV, the RV exhibited a similar twisting pattern, a more longitudinal strain pattern, and a greater amount of displacement.

THE USE OF THREE-DIMENSIONAL MODELING AS A WAY OF INFORMATION AND TECHNICAL SUPPORT OF FORENSIC REGISTRATION

2018 ◽  
Author(s):  
Roman Demchyshak ◽  
Keyword(s):  
Physical Properties ◽  
3D Modeling ◽  
Three Dimensional ◽  
Technical Support ◽  
Modeling Technology ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
3D Scanners ◽  
Three Dimensional Models ◽  
Dimensional Object

The article is devoted to the issues of using three-dimensional modeling as a way of information and technical support of forensic registration. It is stated that none of the modern researches focuses on the use of three- dimensional modeling technology of information and technical support of forensic registration. An assessment of the technological capabilities of modern three-dimensional scanners (3D-scanners), which are used (or can be used) in the information and technical support of forensic registration. The technological possibilities of three-dimensional modeling are analyzed, in particular in the construction of three-dimensional models of the scene, the creation of virtual rooms for educational purposes, forensic examinations, etc. Emphasis is placed on the fact that in criminology, three-dimensional (3D) modeling is carried out according to the rules of solid modeling (in which the key is to reproduce the physical properties of three-dimensional modeling objects). It is the physical properties of forensic registration objects, as a rule, that are the key information, the fixation of which is carried out within the framework of forensic registration. It is determined that the prospects of using three-dimensional (3D) modeling during forensic registration are to ensure the possibility of creating objects of accounting using additive technologies (ie three-dimensional printing (3D- printing)). The position is expressed that the technologies of three-dimensional (3D) modeling can be applied, first of all, in: trasological accounting; ballistic accounting; cold steel accounting; registration of persons on the basis of appearance; accounting of materials, substances and products. Therefore, with 3D modeling, it is possible to reproduce a certain three-dimensional object if it has been properly scanned. The described technologies create opportunities not only to quickly create exact copies or duplicates of evidence or other objects that are placed in forensic accounting, and use them for other research or for use as objects of orientation during operational or investigative actions.

Multi-Objective Dynamic Decision of CIA for Cascade Hydropower Development

2013 ◽  
Vol 639-640 ◽  
pp. 1227-1231
Author(s):  
Shan Shan Zhong ◽  
Fei Lian Zhang ◽  
Hua Long Wang
Keyword(s):  
Evaluation Method ◽  
Three Dimensional ◽  
Environment Impact ◽  
Future Time ◽  
Multi Objective ◽  
Decision Method ◽  
The Past ◽  
Changing Trends ◽  
Alternative Ranking ◽  
Three Dimensional Coordinate

Considering the characteristics of hydropower cascade development project’s cumulative environment impacts, such as scope broad, many indexes and so on, a new evaluation method- dynamic multi-objective decision method is adopted. This method makes alternative ranking under three-dimensional coordinate, then assessing the cumulative environment impact and its developing trends. The result indicates that this method can not only observes the cumulative impact’s changing degree in the past time, but also predict the changing trends in future time. It is able to comprehensively evaluate the cumulative environment impact.

Sign in / Sign up

Export Citation Format

Share Document