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Author: Linbo Bai
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
In recent years, point-sampled geometry is becoming ubiquitous in graphics and geometric information processing. From a computer graphics point of view, the first major challenge in point-based geometry is to render high quality realistic images. A commonly used technique in realistic rendering is texture mapping, which essentially adds surface and/or material property detail in the final stages of rendering the image. The primary focus of the research reported in this thesis is to find suitable solutions to directly map one or more textures onto the surface of geometry represented by points without explicitly converting the surface to polygon mesh or to another geometric surface representation. Parameterization is the most important step required for adding texture onto the surfaces of objects. In this thesis, a global parameterization method is developed by using level set methods to evolve the concerned surface to a surface with implied parameterization, say a sphere. By tracking the point samples to their final destinations on the sphere, a polar coordinate is assigned to every point in the original model. The user then chooses a few anchor points that map into one or more texture images to yield a simple and flexible procedure to map texture images onto the surface of a point-based model. The method has been implemented using MATLAB and C++ and tested on a number of point-based models.
Author: Linbo Bai
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
In recent years, point-sampled geometry is becoming ubiquitous in graphics and geometric information processing. From a computer graphics point of view, the first major challenge in point-based geometry is to render high quality realistic images. A commonly used technique in realistic rendering is texture mapping, which essentially adds surface and/or material property detail in the final stages of rendering the image. The primary focus of the research reported in this thesis is to find suitable solutions to directly map one or more textures onto the surface of geometry represented by points without explicitly converting the surface to polygon mesh or to another geometric surface representation. Parameterization is the most important step required for adding texture onto the surfaces of objects. In this thesis, a global parameterization method is developed by using level set methods to evolve the concerned surface to a surface with implied parameterization, say a sphere. By tracking the point samples to their final destinations on the sphere, a polar coordinate is assigned to every point in the original model. The user then chooses a few anchor points that map into one or more texture images to yield a simple and flexible procedure to map texture images onto the surface of a point-based model. The method has been implemented using MATLAB and C++ and tested on a number of point-based models.
Author: Changsheng Xiang
Publisher:
ISBN:
Category : Digital image correlation
Languages : en
Pages : 75
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Book Description
Adding texture to an object is extremely important for the enhancement of the 3D model's visual realism. This thesis presents a new method for mapping texture onto a 3D face model. The complete architecture of the new method is described. In this thesis, there are two main parts, one is 3D mesh modifying and the other is image processing. In 3D mesh modifying part, we use one face obj file as the 3D mesh file. Based on the coordinates and indices of that file, a 3D face wireframe can be displayed on screen by using OpenGL API. The most common method for mapping texture onto 3D mesh is to do mesh parametrization. To achieve this goal, a perspective-projection method is used to map 3D mesh to a 2D plane. To improve the degree of the accuracy, we separates the 3D mesh into three pieces based on three different view positions from left to right. In image processing part, we extracted the face information from the green background images by using image segmentation. Because of the three face images from different view positions, so they have different light illumination. In this thesis, a button controller was made to control the light illumination of three parts separately. The image blending method was used to reduce the texture seam between two different parts of the mesh.The proposed method in this thesis is new way to add detail to a 3D model. It provides a valid texture mapping, also satisfies the man-machine interaction exactly. Even if the images are taken under the different illumination, users can use keyboard to change its illumination for color matching. This new way provides a new method to parametrize and modify the mesh so as to be used for texture mapping.
Author: David S. Ebert
Publisher: Academic Press
ISBN: 1483297020
Category : Computers
Languages : en
Pages : 363
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Book Description
Congratulations to Ken Perlin for his 1997 Technical Achievement Award from the Academy of Motion Picture Arts and Science Board of Governors, given in recognition of the development of "Turbulence", Perlin Noise, a technique discussed in this book which is used to produce natural appearing textures on computer-generated surfaces for motion picture visual effects. Dr. Perlin joins Darwyn Peachey (co-developer of RenderMan(R), also discussed in the book) in being honored with this prestigious award. * * Written at a usable level by the developers of the techniques* Serves as a source book for those writing rendering systems, shaders, and animations.* Discusses the design and implementation of noise functions.* Contains procedural modeling of gases, hypertextures, mountains, and landscapes.* Provides a toolbox of specific procedures and basic primitive functions for producing realistic images.* Procedures are presented in C code segments or in Renderman shading language. * 3.5" disk contains the code from within the book for easy implementation
Author: Minh Xuan Nguyen
Publisher:
ISBN:
Category :
Languages : en
Pages : 274
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Book Description
Author: Peter M.A. Sloot
Publisher: Springer
ISBN: 3540460802
Category : Computers
Languages : en
Pages : 1153
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Book Description
Computational Science is the scienti?c discipline that aims at the development and understanding of new computational methods and techniques to model and simulate complex systems. The area of application includes natural systems – such as biology, envir- mental and geo-sciences, physics, and chemistry – and synthetic systems such as electronics and ?nancial and economic systems. The discipline is a bridge b- ween ‘classical’ computer science – logic, complexity, architecture, algorithms – mathematics, and the use of computers in the aforementioned areas. The relevance for society stems from the numerous challenges that exist in the various science and engineering disciplines, which can be tackled by advances made in this ?eld. For instance new models and methods to study environmental issues like the quality of air, water, and soil, and weather and climate predictions through simulations, as well as the simulation-supported development of cars, airplanes, and medical and transport systems etc. Paraphrasing R. Kenway (R.D. Kenway, Contemporary Physics. 1994): ‘There is an important message to scientists, politicians, and industrialists: in the future science, the best industrial design and manufacture, the greatest medical progress, and the most accurate environmental monitoring and forecasting will be done by countries that most rapidly exploit the full potential ofcomputational science’. Nowadays we have access to high-end computer architectures and a large range of computing environments, mainly as a consequence of the enormous s- mulus from the various international programs on advanced computing, e.g.
Author: Nobuhiko Mukai
Publisher: BoD – Books on Demand
ISBN: 9535104551
Category : Computers
Languages : en
Pages : 270
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Book Description
Computer graphics is now used in various fields; for industrial, educational, medical and entertainment purposes. The aim of computer graphics is to visualize real objects and imaginary or other abstract items. In order to visualize various things, many technologies are necessary and they are mainly divided into two types in computer graphics: modeling and rendering technologies. This book covers the most advanced technologies for both types. It also includes some visualization techniques and applications for motion blur, virtual agents and historical textiles. This book provides useful insights for researchers in computer graphics.
Author: Fazilah Hassan
Publisher: Springer Nature
ISBN: 981997240X
Category : Computers
Languages : en
Pages : 518
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Book Description
This book constitutes the refereed proceedings of the 22nd Asia Simulation Conference on Methods and Applications for Modeling and Simulation of Complex Systems, AsiaSim 2023, held in Langkawi, Malaysia, during October 25–26, 2023. The 77 full papers included in this book were carefully reviewed and selected from 164 submissions. They were organized in topical sections as follows: Modelling and Simulation, Artificial intelligence, Industry 4.0, Digital Twins Modelling, Simulation and Gaming, Simulation for Engineering, Simulation for Sustainable Development, Simulation in Social Sciences.
Author: Pengfei Zhao
Publisher: Springer
ISBN: 9811076294
Category : Technology & Engineering
Languages : en
Pages : 932
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Book Description
This book includes a selection of reviewed papers presented at the 49th Conference of the International Circle of Educational Institutes for Graphic Arts Technology and Management & 8th China Academic Conference on Printing and Packaging, which was held on May 14-16, 2017 in Beijing, China. The conference was jointly organized by the Beijing Institute of Graphic Communication, China Academy of Printing Technology, and International Circle of Educational Institutes for Graphic Arts Technology and Management. With eight keynote talks and 200 presented papers on graphic communication and packaging technologies, the event attracted more than 400 scientists. The proceedings cover the latest advances in color science and technology; image processing technology; digital media technology; digital process management technology in packaging; packaging, etc., and will be of interest to university researchers, R&D engineers and graduate students in the graphic arts, packaging, color science, image science, material science, computer science, digital media and network technology.
Author: Vipin Kumar
Publisher: Springer
ISBN: 354044842X
Category : Computers
Languages : en
Pages : 982
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Book Description
The three-volume set, LNCS 2667, LNCS 2668, and LNCS 2669, constitutes the refereed proceedings of the International Conference on Computational Science and Its Applications, ICCSA 2003, held in Montreal, Canada, in May 2003.The three volumes present more than 300 papers and span the whole range of computational science from foundational issues in computer science and mathematics to advanced applications in virtually all sciences making use of computational techniques. The proceedings give a unique account of recent results in computational science.
Author: Ali Ahmadian
Publisher: CRC Press
ISBN: 1000432467
Category : Computers
Languages : en
Pages : 160
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Book Description
This book describes different mathematical modeling and soft computing techniques used to solve practical engineering problems. It gives an overview of the current state of soft computing techniques and describes the advantages and disadvantages of soft computing compared to traditional hard computing techniques. Through examples and case studies, the editors demonstrate and describe how problems with inherent uncertainty can be addressed and eventually solved through the aid of numerical models and methods. The chapters address several applications and examples in bioengineering science, drug delivery, solving inventory issues, Industry 4.0, augmented reality and weather forecasting. Other examples include solving fuzzy-shortest-path problems by introducing a new distance and ranking functions. Because, in practice, problems arise with uncertain data and most of them cannot be solved exactly and easily, the main objective is to develop models that deliver solutions with the aid of numerical methods. This is the reason behind investigating soft numerical computing in dynamic systems. Having this in mind, the authors and editors have considered error of approximation and have discussed several common types of errors and their propagations. Moreover, they have explained the numerical methods, along with convergence and consistence properties and characteristics, as the main objectives behind this book involve considering, discussing and proving related theorems within the setting of soft computing. This book examines dynamic models, and how time is fundamental to the structure of the model and data as well as the understanding of how a process unfolds • Discusses mathematical modeling with soft computing and the implementations of uncertain mathematical models • Examines how uncertain dynamic systems models include uncertain state, uncertain state space and uncertain state’s transition functions • Assists readers to become familiar with many soft numerical methods to simulate the solution function’s behavior This book is intended for system specialists who are interested in dynamic systems that operate at different time scales. The book can be used by engineering students, researchers and professionals in control and finite element fields as well as all engineering, applied mathematics, economics and computer science interested in dynamic and uncertain systems. Ali Ahmadian is a Senior Lecturer at the Institute of IR 4.0, The National University of Malaysia. Soheil Salahshour is an associate professor at Bahcesehir University.
