Progressive Visualization of Complex 3D Models Over the Internet

2016 ◽  
Vol 20 (6) ◽  
pp. 887-902 ◽  
Author(s):  
Jing Chen ◽  
Jiawei Li ◽  
Mo Li
Keyword(s):  
3D Models ◽  
The Internet

scholarly journals Modernising Anatomy Teaching: Which Resources Do Students Rely On?

2020 ◽  
Vol 7 ◽  
pp. 238212052095515
Author(s):  
Billy C Leung ◽  
Matthew Williams ◽  
Christopher Horton ◽  
Thomas DA Cosker
Keyword(s):  
3D Models ◽  
The Internet ◽  
Computer Assisted ◽  
First Year ◽  
Learning Resources ◽  
Undergraduate Medical Students ◽  
Computer Assisted Learning ◽  
Post Intervention ◽  
Digital Platforms ◽  
The University

The way in which we learn anatomy has changed exponentially over the decades and students now have access to lecture notes, textbooks, computer-assisted programmes, and a wide variety of internet based information. This study explored which resources were the most (and least) useful for a group of first year, undergraduate, medical students, with minimal prior content exposure (aged 18 and 19 years old, n = 76), over an 18 month period. Anatomy websites were found to be the most useful (30%), followed by tutorials (20%) and lectures (19%). A total of 13% found the university computer-assisted learning (CAL) platform least useful. We subsequently enhanced our ‘urogenital’ CAL anatomy module, with inclusion of new and updated images, videos and tutorials, as well as, digital and printed 3D-models. A post-intervention survey (n = 81) showed an increase from 12% to 27% for CAL as being most useful, and a decrease from 13% to 3% as being least useful. Our results provided a snapshot of students’ preferences in studying anatomy, and highlighted the importance of digital platforms and the need for evaluating our own learning resources. We must be mindful that there is an increasing tendency for students to rely on the Internet for information, which may expose them to unfiltered and unreliable content. We conclude that educators must be aware of the spectrum of learning resources used by students, to ensure that our own Institutional eLearning platforms are optimised to meet the diverse needs of learners.

scholarly journals Design and Implementation of 3D Film and Television Scene Production Algorithm Based on the Internet of Things

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Ruiying Kuang
Keyword(s):  
Internet Of Things ◽  
Collision Detection ◽  
3D Models ◽  
The Internet ◽  
Film And Television ◽  
Mapping Technology ◽  
3D Scene ◽  
Internet Of Things Technology ◽  
3D Movie ◽  
The Internet Of Things

Film and television itself is a product of culture and innovation, combining digital technology, creative thinking, and artistic design. In the rapid development of 3D film and television, the situation of scene design and production has also become an important role. In a typical environment, the main scene plays the role of film and television and coherent plot. This thesis mainly analyzes the design and implementation of a 3D movie scene production algorithm based on the Internet of Things and also makes 3D movie scenes through the algorithm of Internet of Things technology. This article also analyzes the traditional 3D scene-making algorithm, which is mainly composed of a plane mapping part, a basic primitive generation part, a collision detection and positioning part, and a terrain generation part. Among them, the plane mapping technology provides the function of using plane mapping to simulate 3D objects. The basic primitive generation part uses the OpenGl function to draw 3D primitives and paste the BMP format image on each surface of the stereo primitives, so that the 3D model can be represented by a plane texture; collision detection is a key part of mechanical physics, which can detect games of the physical edge of the object in the middle; the terrain generation part uses the converted gray height value as the corresponding grid terrain height and uses planar mapping technology to capture the image of the entire terrain, that is, paste and generate a terrain map. The results show that a characteristic of the algorithm of the Internet of Things technology is that the 3D scene is completely mapped. This avoids the trouble of using 3DMAX and other tools to create 3D models and also reduces the difficulty of creating 3D scenes and makes the execution efficient, which is better than directly importing 3D models, runs faster, and runs very smoothly. The Internet of Things is an important development trend in the Internet information age and can be used to produce 3D film and television scenes to reduce development difficulty and cost and has a variety of research and development value and practical value. In the analysis part, this article also introduces the algorithms used in the scene production and passes the tests of 4 different files in 4 different frames and also found that more than 83% of people feel that the use of Internet of Things algorithms in the production of 3D movie scenes has improved production efficiency.

scholarly journals Survey on 3D Content Encryption

2021 ◽  
Vol 15 (15) ◽  
pp. 115
Author(s):  
Nashwan Alsalam Ali ◽  
Abdul Monem S. Rahma ◽  
Shaimaa H. Shaker
Keyword(s):  
Chaotic Maps ◽  
3D Models ◽  
The Internet ◽  
Partial Protection ◽  
Encryption Schemes ◽  
3D Applications ◽  
And Diffusion ◽  
Confusion And Diffusion ◽  
Full Protection ◽  
3D Content

<p class="0abstract">The rapidly growing 3D content exchange over the internet makes securing 3D content became a very important issue. The solution for this issue is to encrypting data of 3D content, which included two main parts texture map and 3D models. The standard encryption methods such as AES and DES are not a suitable solution for 3D applications due to the structure of 3D content, which must maintain dimensionality and spatial stability. So, these problems are overcome by using chaotic maps in cryptography, which provide confusion and diffusion by providing uncorrelated numbers and randomness. Various works have been applied in the field of 3D content-encryption based on the chaotic system. This survey will attempt to review the approaches and aspects of the structure used for 3D content encryption methods for different papers. It found the methods that used chaotic maps with large keyspace are more robust to various attacks than other methods that used encryption schemes without chaotic maps. The methods that encrypting texture, polygon, and vertices for 3D content provide full protection than another method that provides partial protection.</p>

Geometric Simplification to Stream 3D Models for Collaborative Product Design

2005 ◽  
Author(s):  
W. D. Li ◽  
W. F. Lu ◽  
Y. L. Cai
Keyword(s):  
Collaborative Design ◽  
3D Models ◽  
The Internet ◽  
Collaborative Product Design ◽  
Promising Solution ◽  
Web 3D ◽  
Design Systems ◽  
3D Streaming ◽  
Edge Collapse ◽  
Collapse Process

One of the challenging problems that hinder the development of collaborative design systems is the contradiction of large CAD files and the limited speed to share them over the Internet and Web. 3D streaming technique, which can allow effective and efficient dispatch and access of large-volume CAD data as a series of patched streams across the Internet, provides a promising solution to overcome the obstacle. Geometric simplification (or decimation) of 3D models is the key algorithm to realize the streaming technique. In this paper, a new geometric simplification algorithm has been developed, in which two criteria are the crucial elements to control the collapse process for edges in 3D VRML models to reduce the amount of information. The major feature of the algorithm is that it has incorporated some advantages of the previously developed vertex decimation approach and edge collapse approach. Meanwhile, the mechanism of adaptive threshold parameters adopted in this work enhances the adaptability of the algorithm for various applications. Through case studies and comparisons with some related works, the algorithm shows good performance and potentials in terms of efficiency, adaptability and robustness.

scholarly journals AR Enabled IoT for a Smart and Interactive Environment: A Survey and Future Directions

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4330 ◽  
Author(s):  
Jo ◽  
Kim
Keyword(s):  
Internet Of Things ◽  
3D Models ◽  
Wireless Networking ◽  
Living Environment ◽  
The Internet ◽  
Future Directions ◽  
Current State ◽  
Interactive Environment ◽  
The Internet Of Things ◽  
Intuitive Manner

Accompanying the advent of wireless networking and the Internet of Things (IoT), traditional augmented reality (AR) systems to visualize virtual 3D models of the real world are evolving into smart and interactive AR related to the context of things for physical objects. We propose the integration of AR and IoT in a complementary way, making AR scalable to cover objects everywhere with an acceptable level of performance and interacting with IoT in a more intuitive manner. We identify three key components for realizing such a synergistic integration: (1) distributed and object-centric data management (including for AR services); (2) IoT object-guided tracking; (3) seamless interaction and content interoperability. We survey the current state of these respective areas and herein discuss research on issues about realizing a future smart and interactive living environment.

scholarly journals 3D Polygon Mesh Encryption Based on 3D Lorenz Chaotic Map

2021 ◽  
Vol 15 (15) ◽  
pp. 103
Author(s):  
Nashwan Alsalam Ali ◽  
Abdul Monem S. Rahma ◽  
Shaimaa H. Shaker
Keyword(s):  
Hausdorff Distance ◽  
3D Model ◽  
Chaotic Map ◽  
3D Models ◽  
Experimental Results ◽  
The Internet ◽  
Mesh Model ◽  
Polygon Mesh ◽  
Matching Degree ◽  
Excellent Property

<p class="0abstract">The multimedia application developments in recent years lead to the widespread of 3D model applications. It becomes more popular in various fields as well as exchanging it over the internet. The security of the 3D models is a very important issue now a day, so the scheme for encrypting the 3D model will be proposed in this work. In this proposed scheme, the 3D polygon mesh model will be protected through the encrypting process based on a 3D Lorenz Chaotic map where the vertices value of the 3D polygon mesh model will be modified using 3D keys generated by 3D Lorenz Chaotic Map, which has excellent property and provides a good diffusion. The proposed scheme was implemented on various 3D models, which have a different number of vertices and faces. The experimental results show that the proposed scheme has good encryption results, which were noted through completely deforming and changing the whole shape of the 3D models. The Hausdorff Distance (HD) and histogram metrics are adopted to calculate the matching degree between the original and extracted model. The results show that the original and extracted model are identical through the values of HD, where they are approximately zero, and the histogram visually is identical.    </p>

Cataloging the 3D web: the availability of educational 3D models on the internet

2016 ◽  
Vol 34 (2) ◽  
pp. 239-258 ◽  
Author(s):  
Michael Groenendyk
Keyword(s):  
Computer Aided Design ◽  
3D Model ◽  
3D Models ◽  
3D Modelling ◽  
The Internet ◽  
Content Type ◽  
3D Printers ◽  
3D Printed ◽  
The Subject ◽  
Aided Design

Purpose – The number of 3D models available on the internet to both students and educators is rapidly expanding. Not only are the 3D model collections of popular websites like Thingiverse.com growing, organizations such as the Smithsonian Institution and NASA have also recently begun to build collections of 3D models and make these openly accessible online. Yet, even with increased interest in 3D printing and 3D scanning technologies, little is known about the overall structure of the 3D models available on the internet. The paper aims to discuss this issue. Design/methodology/approach – To initiate this project, a list was built of 33 of the most widely used 3D model websites on the internet. Freely downloadable models, as well as models available for purchase or as 3D printed objects were included in the list. Once the list of 33 websites was created, the data for each individual 3D model in the collections was manually assembled and recorded. The titles of the 3D models, keywords, subject headings, license information, and number of views and downloads were recorded, as this information was available. The data were gathered between January and May 2015, and compiled into a CSV database. To determine how online 3D model content relates to a variety of educational disciplines, relevant subject terms for a variety of educational disciples were extracted from the EBSCO database system. With this list of subject terms in hand, the keywords in the CSV database of model information were searched for each of the subject terms, with an automated process using a Perl script. Findings – There have been many teachers, professors, librarians and students who have purchased 3D printers with little or no 3D modelling skills. Without these skills the owners of these 3D printers are entirely reliant on the content created and freely shared by others to make use of their 3D printers. As the data collected for this research paper shows, the vast majority of open 3D model content available online pertains to the professions already well versed in 3D modelling and Computer Aided Design design, such as engineering and architecture. Originality/value – Despite that fact that librarians, teachers and other educators are increasingly using technologies that rely on open 3D model content as educational tools, no research has yet been done to assess the number of 3D models available online and what educational disciplines this content relates to. This paper attempts to fill this gap, providing an overview of the size of this content, the educational disciplines this content relates to and who has so far been responsible for developing this content. This information will be valuable to librarians and teachers currently working with technology such as 3D printers and virtual reality, as well as those considering investing in this technology.

Constructing Web-Based Object-Oriented Design Support System for Collaborative Ship Modeling

2007 ◽  
Vol 44 (03) ◽  
pp. 139-150
Author(s):  
Wei Tann ◽  
Heiu-Jou Shaw
Keyword(s):  
Support System ◽  
Collaborative Design ◽  
Three Dimensional ◽  
Object Oriented ◽  
3D Models ◽  
Communication Process ◽  
The Internet ◽  
Design Support ◽  
Object Oriented Design ◽  
Design Support System

Multidiscipline three-dimensional (3D) design tools are utilized by most advanced shipyards in the world to gain both competitive advantage and productivity. While deadlines become shorter and shorter, the complexity of modern commercial vessels increases steadily; therefore, it is imperative for the marine industry to integrate diverse engineering information systems. 3D models are repetitiously constructed mainly because specified requirements on different design stages are time-consuming. In order to supersede costly point-to-point integration or system-specific integration that have been used, much attention has been paid to develop the advanced and open platform to not only codevelop parts by designers at different geographical locations, coordinate dissimilar applications and application components, but facilitate connectivity and the overall communication process to provide the end user with integrated and consistent data. This paper describes the object-oriented data-sharing collaborative design support system (DSS). DSS is proposed to speed up the construction of 3D models by the Internet technologies to translate product data and further be capable of providing reasonable model configurations of XML descriptions and sharing Web Services on the Internet to comply with shipyards' specific strategies.

An Agent Based Framework to Automatically Generate 3D CAD Models of Customer Specified Products

2003 ◽  
Author(s):  
Zahed Siddique ◽  
Karunakar Reddy Boddu
Keyword(s):  
Mass Customization ◽  
3D Model ◽  
Product Information ◽  
3D Models ◽  
The Internet ◽  
Agent Based ◽  
User Input ◽  
3D Cad ◽  
Design And Manufacturing ◽  
Cad Models

To survive in today’s volatile market, companies are striving to deliver greater quality, more customization, faster response, more innovative designs and lower prices. The new shift in the current market has introduced the concept of mass customization. One of the aspects of mass customization is to provide customers with products that are manufactured to their needs and requirements. To provide such a support requires better integration of customer with different stages of design and manufacturing. Expansion of the Internet provides an opportunity for such an integration, which will need to link design and manufacturing of the company with the customer. In current approaches, customer usually specifies the options and gets the price or simple pictures of the object. In this paper a system is presented, where customer options and size parameters are gathered using the Internet and is used to automatically generate 3D CAD model of the product and then display the 3D model to the customer for feedback. Development of a framework to generate 3D models from user input will require maintaining explicit correspondence among various types of product information from a module perspective. The Internet based system presented in this paper uses templates to automatically generate 3D CAD models of components, assemble them into products and then export VRML files that are displayed to the customer.

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