36 research outputs found

    3D CAD systems for the clothing industry

    Get PDF
    The approaches for designing virtual garments may be categorised as ‘2D to 3D’ and ‘3D to 2D’. The former refers to draping flat digital pattern pieces on a virtual mannequin, and the later indicates the development of clothing design on a realistic body and subsequent flattening into 2D pattern pieces. Several computer-aided design (CAD) systems for garment visualisation in space from flat patterns have already been introduced into the clothing industry. Any industrial application of the pattern flattening technique is yet to be made, due to the non-availability of an appropriate CAD system on the market. This article reviews the historical developments of 3D CAD systems for the clothing industry, and assesses the features of currently available systems on market

    Web based public participation in visual impact assessment of urban landscape.

    Get PDF
    Zhang Zongyu.Thesis (M.Phil.)--Chinese University of Hong Kong, 2001.Includes bibliographical references (leaves 101-108).Abstracts in English and Chinese.ABSTRACT IN ENGLISH --- p.i-iiABSTRACT IN CHINESE --- p.iiiACKNOWLEDGEMENTS --- p.iv-vTABLE OF CONTENTS --- p.vi-viiiLIST OF TABLES --- p.ixLIST OF FIGURES --- p.x-xiChapter CHAPTER ONE --- INTRODUCTIONChapter 1.1 --- Landscape and landscape Assessment --- p.1Chapter 1.1.1 --- The descriptive inventory approach --- p.2Chapter 1.1.2 --- Public preference models --- p.4Chapter 1.2 --- Urban Landscape --- p.5Chapter 1.3 --- Relationship between professional and public --- p.8Chapter 1.3.1 . --- Inherent conflicts --- p.9Chapter 1.3.2. --- Roles of both sides --- p.9Chapter 1.3.3 --- Collaboration between professionals and the public --- p.10Chapter CHAPTER TWO --- VISUAL IMPACT ASSESSMENTChapter 2.1 --- The needs for visual impact assessment --- p.13Chapter 2.2 --- The visual impact assessment process --- p.16Chapter 2.3 --- The information inventory in the visual impact assessment --- p.19Chapter 2.3.1 --- Landscape simulation --- p.20Chapter 2.3.2 --- Visual impacts identification --- p.22Chapter 2.4 --- Public participation --- p.23Chapter 2.4.1 --- Public preference in the urban landscape --- p.24Chapter 2.4.2 --- Public accessibility to the urban landscape planning process --- p.28Chapter CHAPTER THREE --- CAPTURING THE SYSTEM SPECIFICATIONSChapter 3.1 --- General considerations --- p.30Chapter 3.1.1 --- Function requirements --- p.30Chapter 3.1.2 --- Project management --- p.32Chapter 3.1.3 --- User interface --- p.33Chapter 3.1.4 --- Web access --- p.34Chapter 3.1.5 --- Qualification of public participation in urban planning --- p.35Chapter 3.2 --- Envisioning the proposed web based system --- p.37Chapter 3.2.1 --- Proposed virtual collaboration --- p.38Chapter 3.2.1.1 --- Improving participants' access to the web based visual impact assessment --- p.39Chapter 3.2.1.2 --- Capturing the public appreciation --- p.41Chapter 3.2.2 --- Collaboration between planners and public --- p.43Chapter CHAPTER FOUR --- SYSTEM DESIGNChapter 4.1 --- Main software or tools for developing the proposed web based system --- p.45Chapter 4.1.1 --- Arcview 3.1 or Arc/Info with 3D analyst and Internet mapping server extensions --- p.46Chapter 4:1.2 --- VRML 2.0 and Java --- p.49Chapter 4.1.3 --- Java3D API --- p.52Chapter 4.2 --- System configuration --- p.55Chapter 4.2.1. --- System architecture --- p.55Chapter 4.2.2. --- Data management --- p.57Chapter 4.2.2.1 --- Urban landscape information management --- p.57Chapter 4.2.2.2 --- Public participation --- p.64Chapter 4.2.3. --- User interface design --- p.69Chapter CHAPTER FIVE --- PROTOTYPE SYSTME AND PILOT STUDYChapter 5.1 --- General description --- p.74Chapter 5.2 --- Implementation --- p.75Chapter 5.2.1 --- Connecting the two-dimensional world with a three-dimensional virtual urban environment --- p.75Chapter 5.2.2 --- Data flow of the system for interactions between the GIS and the VRML browser --- p.77Chapter 5.3 --- Data preparation --- p.81Chapter 5.3.1 --- Constructing the terrain model --- p.81Chapter 5.3.2 --- Retrieving the landscape themes --- p.87Chapter 5.4 --- Public oriented user interface design --- p.88Chapter 5.5 --- Participation log --- p.96Chapter CHAPTER SIX --- CONCLUSIONAPPENDI

    The Simulation System for Propagation of Fire and Smoke

    Get PDF
    This work presents a solution for a real-time fire suppression control system. It also serves as a support tool that allows creation of virtual ship models and testing them against a range of representative fire scenarios. Model testing includes generating predictions faster than real time, using the simulation network model developed by Hughes Associates, Inc., their visualization, as well as interactive modification of the model settings through the user interface. In the example, the ship geometry represents ex-USS Shadwell, test area 688, imitating a submarine. Applying the designed visualization techniques to the example model revealed the ability of the system to process, store and render data much faster than the real time (in average, 40 times faster)

    Framework for indoor video-based augumented reality applications

    Get PDF
    Augmented Reality (AR) has been proven to be useful in many fields such as medical surgery, military training, engineering design, tourist guiding, manufacturing and maintenance. Several AR systems and tracking tools have been reviewed and examined. Taking into consideration the different shortcomings of the available AR systems, a framework for indoor video-based AR applications is proposed to integrate four main components of AR applications, which are large scale virtual environment, mobile devices, interaction methods and video-tracking, in one system. The proposed framework benefits from the rapidly evolving technology in virtual modeling by combing GIS maps and 3D virtual models of cities and building interiors in one single platform. Interaction methods for AR applications are introduced, such as the automatic 3D picking which allows for a location-based data access. In addition, a practical method is proposed for the configuration and the deployment of video tracking. This method makes use of the XML mark-up language to allow for future extensions and simplified interchangeability. An implementation of the proposed approach is developed to demonstrate the feasibility of the framework. Different case studies are carried out to validate the applicability of the system and identify its benefits and limitations

    A Framework for Test & Evaluation of Autonomous Systems Along the Virtuality-Reality Spectrum

    Get PDF
    Test & Evaluation of autonomous vehicles presents a challenge as the vehicles may have emergent behavior and it is frequently difficult to ascertain the reason for software decisions. Current Test & Evaluation approaches for autonomous systems place the vehicles in various operating scenarios to observe their behavior. However, this introduces dependencies between design and development lifecycle of the autonomous software and physical vehicle hardware. Simulation-based testing can alleviate the necessity to have physical hardware; however, it can be costly when transitioning the autonomous software to and from a simulation testing environment. The objective of this thesis is to develop a reusable framework for testing autonomous software such that testing can be conducted at various levels of mixed reality provided the framework components are sufficient to support data required by the autonomous software. The paper describes the design of the software framework and explores its application through use cases
    corecore