Designing a Virtual Reality Game for the Pediatric Patient-Player Experience
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The Application of Voxel Size Correction in X-Ray Computed Tomography for Dimensional Metrology
SINCE2013 Singapore International NDT Conference & Exhibition 2013, 19-20 July 2013 The Application of Voxel Size Correction in X-ray Computed Tomography for Dimensional Metrology Joseph J. LIFTON1,2, Andrew A. MALCOLM2, John W. MCBRIDE1,3, Kevin J. CROSS1 1The University of Southampton, United Kingdom; Email: [email protected]. 2Singapore Institute of Manufacturing Technology, Singapore; Email: [email protected]. 3The University of Southampton Malaysia Campus (USMC), Malaysia; Email: [email protected]. Abstract X-ray computed tomography (CT) is a non-destructive, radiographic scanning technique that enables the visualisation and dimensional evaluation of both internal and external features of a workpiece; it is therefore an attractive alternative for measurement tasks that prove problematic for conventional tactile and optical instruments. The data output of a CT measurement is a volume of grey value integers that describe the material distribution of the scanned workpiece; the relative spacing of volume-elements (voxels) is termed voxel size and influences all dimensional information evaluated from a CT data-set. Voxel size is defined by the position of a workpiece relative to the X-ray source and detector, and is therefore prone to axis position errors, errors in the geometric alignment of the CT system’s hardware, and the positional drift of the X-ray focal spot. In this work a method is presented for calculating a voxel scaling factor that corrects for voxel size errors, and this method is then applied to a general X-ray CT measurement task and demonstrated to reduce measurement errors. Keywords: X-ray computed tomography, dimensional metrology, calibration, uncertainty, voxel size. -
Temporal Voxel Cone Tracing with Interleaved Sample Patterns by Sanghyeok Hong
c 2015, SangHyeok Hong. All Rights Reserved. The material presented within this document does not necessarily reflect the opinion of the Committee, the Graduate Study Program, or DigiPen Institute of Technology. TEMPORAL VOXEL CONE TRACING WITH INTERLEAVED SAMPLE PATTERNS BY SangHyeok Hong THESIS Submitted in partial fulfillment of the requirements for the degree of Master of Science in Computer Science awarded by DigiPen Institute of Technology Redmond, Washington United States of America March 2015 Thesis Advisor: Gary Herron DIGIPEN INSTITUTE OF TECHNOLOGY GRADUATE STUDIES PROGRAM DEFENSE OF THESIS THE UNDERSIGNED VERIFY THAT THE FINAL ORAL DEFENSE OF THE MASTER OF SCIENCE THESIS TITLED Temporal Voxel Cone Tracing with Interleaved Sample Patterns BY SangHyeok Hong HAS BEEN SUCCESSFULLY COMPLETED ON March 12th, 2015. MAJOR FIELD OF STUDY: COMPUTER SCIENCE. APPROVED: Dmitri Volper date Xin Li date Graduate Program Director Dean of Faculty Dmitri Volper date Claude Comair date Department Chair, Computer Science President DIGIPEN INSTITUTE OF TECHNOLOGY GRADUATE STUDIES PROGRAM THESIS APPROVAL DATE: March 12th, 2015 BASED ON THE CANDIDATE'S SUCCESSFUL ORAL DEFENSE, IT IS RECOMMENDED THAT THE THESIS PREPARED BY SangHyeok Hong ENTITLED Temporal Voxel Cone Tracing with Interleaved Sample Patterns BE ACCEPTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN COMPUTER SCIENCE AT DIGIPEN INSTITUTE OF TECHNOLOGY. Gary Herron date Xin Li date Thesis Committee Chair Thesis Committee Member Pushpak Karnick date Matt -
Video Game Archive: Nintendo 64
Video Game Archive: Nintendo 64 An Interactive Qualifying Project submitted to the Faculty of WORCESTER POLYTECHNIC INSTITUTE in partial fulfilment of the requirements for the degree of Bachelor of Science by James R. McAleese Janelle Knight Edward Matava Matthew Hurlbut-Coke Date: 22nd March 2021 Report Submitted to: Professor Dean O’Donnell Worcester Polytechnic Institute This report represents work of one or more WPI undergraduate students submitted to the faculty as evidence of a degree requirement. WPI routinely publishes these reports on its web site without editorial or peer review. Abstract This project was an attempt to expand and document the Gordon Library’s Video Game Archive more specifically, the Nintendo 64 (N64) collection. We made the N64 and related accessories and games more accessible to the WPI community and created an exhibition on The History of 3D Games and Twitch Plays Paper Mario, featuring the N64. 2 Table of Contents Abstract…………………………………………………………………………………………………… 2 Table of Contents…………………………………………………………………………………………. 3 Table of Figures……………………………………………………………………………………………5 Acknowledgements……………………………………………………………………………………….. 7 Executive Summary………………………………………………………………………………………. 8 1-Introduction…………………………………………………………………………………………….. 9 2-Background………………………………………………………………………………………… . 11 2.1 - A Brief of History of Nintendo Co., Ltd. Prior to the Release of the N64 in 1996:……………. 11 2.2 - The Console and its Competitors:………………………………………………………………. 16 Development of the Console……………………………………………………………………...16 -
Game Changer: Investing in Digital Play to Advance Children’S Learning and Health, New York: the Joan Ganz Cooney Center at Sesame Workshop
Game 2 changer: June 2009 Investing in digital play to advance children's learning and health Ann My Thai David Lowenstein Dixie Ching David Rejeski The Joan Ganz Cooney Center at Sesame Workshop © The Joan Ganz Cooney Center !""#. All rights reserved. The mission of the Joan Ganz Cooney Center at Sesame Workshop is to foster innovation in children’s learning through digital media. The Center supports action research, encourages partnerships to connect child development experts and educators with interactive media and technology leaders, and mobilizes public and private investment in promising and proven new media technologies for children. For more information, visit www.joanganzcooneycenter.org. The Joan Ganz Cooney Center is committed to disseminating useful and timely research. Working closely with our Cooney Fellows, national advisers, media scholars, and practitioners, the Center publishes industry, policy, and research briefs examining key issues in the $eld of digital media and learning. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, or any information storage and retrieval system, without permission from The Joan Ganz Cooney Center at Sesame Workshop. A full-text PDF of this document is available for free download from www.joanganzcooneycenter.org. Individual print copies of this publication are available for %&' via check, money order, or purchase order sent to the address below. Bulk-rate prices are available on request. For permission to reproduce excerpts from this report, please contact: Attn: Publications Department The Joan Ganz Cooney Center Sesame Workshop One Lincoln Plaza New York, NY &""!( p: !&! '#' ()'* f: !&! +,' ,("+ [email protected] Suggested citation: Thai, A., Lowenstein, D., Ching, D., & Rejeski, D. -
Human Body Model Acquisition and Tracking Using Voxel Data
Submitted to the International Journal of Computer Vision Human Body Model Acquisition and Tracking using Voxel Data Ivana Mikić2, Mohan Trivedi1, Edward Hunter2, Pamela Cosman1 1Department of Electrical and Computer Engineering University of California, San Diego 2Q3DM, Inc. Abstract We present an integrated system for automatic acquisition of the human body model and motion tracking using input from multiple synchronized video streams. The video frames are segmented and the 3D voxel reconstructions of the human body shape in each frame are computed from the foreground silhouettes. These reconstructions are then used as input to the model acquisition and tracking algorithms. The human body model consists of ellipsoids and cylinders and is described using the twists framework resulting in a non-redundant set of model parameters. Model acquisition starts with a simple body part localization procedure based on template fitting and growing, which uses prior knowledge of average body part shapes and dimensions. The initial model is then refined using a Bayesian network that imposes human body proportions onto the body part size estimates. The tracker is an extended Kalman filter that estimates model parameters based on the measurements made on the labeled voxel data. A voxel labeling procedure that handles large frame-to-frame displacements was designed resulting in the very robust tracking performance. Extensive evaluation shows that the system performs very reliably on sequences that include different types of motion such as walking, sitting, dancing, running and jumping and people of very different body sizes, from a nine year old girl to a tall adult male. 1. Introduction Tracking of the human body, also called motion capture or posture estimation, is a problem of estimating the parameters of the human body model (such as joint angles) from the video data as the position and configuration of the tracked body change over time. -
Effects of Controller-Based Locomotion on Player
Effects of Controller-based Locomotion on Player Experience in a Virtual Reality Exploration Game Julian Frommel, Sven Sonntag, Michael Weber Institute of Media Informatics, Ulm University James-Franck Ring Ulm, Germany {firstname.lastname}@uni-ulm.de ABSTRACT 1 INTRODUCTION Entertainment and in particular gaming is currently consid- With the recent release of several consumer grade VR HMDs, ered one of the main application scenarios for virtual reality there has been growing interest in the design and development (VR). The majority of current games rely on any form of loco- of VR games. As a result, player experience research has been motion through the virtual environment while some techniques increasingly concerned with interaction in VR gaming. Games can lead to simulator sickness. Game developers are currently in general as well as VR games frequently require that the implementing a wide variety of locomotion techniques to cope player can move from one position to another. While providing with simulator sickness (e.g. teleportation). In this work we such an interaction is easy in non-VR games it can be quite implemented and evaluated four different controller-based challenging for VR games. Although locomotion is possible locomotion methods that are popular in current VR games for roomscale VR systems like the HTC Vive [12] the available (free teleport, fixpoint teleport, touchpad-based, automatic). space is too limited for the requirements of a lot of games. We conducted a user study (n = 24) in which participants Therefore, game developers employ many different approaches explored a virtual zoo with these four different controller-based to provide locomotion for players. -
Video Game Violence: a Review of the Empirical Literature
Aggression and Violent Behavior, Vol. 3, No. 4, pp. 407±428, 1998 Copyright 1998 Elsevier Science Ltd Printed in the USA. All rights reserved 1359-1789/98 $19.00 ϩ .00 PII S1359-1789(97)00001-3 VIDEO GAME VIOLENCE: A REVIEW OF THE EMPIRICAL LITERATURE Karen E. Dill and Jody C. Dill Lenoir-Rhyne College ABSTRACT. The popularity of video games, especially violent video games, has reached phenomenal proportions. The theoretical line of reasoning that hypothesizes a causal relation- ship between violent video-game play and aggression draws on the very large literature on media violence effects. Additionally, there are theoretical reasons to believe that video game effects should be stronger than movie or television violence effects. This paper outlines what is known about the relationship between violent video-game playing and aggression. The available literature on virtual reality effects on aggression is discussed as well. The preponder- ance of the evidence from the existing literature suggests that exposure to video-game violence increases aggressive behavior and other aggression-related phenomena. However, the paucity of empirical data, coupled with a variety of methodological problems and inconsistencies in these data, clearly demonstrate the need for additional research. 1998 Elsevier Science Ltd KEY WORDS. Violence, video games, aggression, virtual reality VIDEO GAME VIOLENCE: A REVIEW OF THE EMPIRICAL LITERATURE All the time people say to me, ªVlad, how do you do it? How come you're so good at killing people? What's your secret?º I tell them, ªThere is no secret. It's like anything else. Some guys plaster walls, some guys make shoes, I kill people. -
A Process Algebraic Form to Represent Extensive Games 1
A Process Algebraic Form to Represent Extensive Games Department of Mathematical Sciences, Sharif University of Technology, P. O. Box 11365-9415, Tehran, Iran Complex and Multi Agent System Lab Omid Gheibi∗, Rasoul Ramezaniany (alphabetical order) Abstract We present an agent-based display of extensive games inspired by concepts in process theory and process algebra. In games with lots of agents, it is a good strategy to explain the behavior of each agent individually by an adequate process (called process- game), and then obtain the whole of the game through parallel composition of these process-games. We propose a method based on agent-based display (introduced in this paper) to find the Nash equilibrium of extensive games in linear space complexity by deploying a revision of depth first search. Keywords: Extensive games, Nash equilibrium, process theory, process algebra 1 Introduction The word processes refers to behavior of a system (a game, a protocol, a machine, a software, and so on). The behavior of a system is the total of actions performed in the system and the order of their executions. The process theory [8] makes it possible to model the behavior of a system with enormous complexity through modeling the behavior of its components. Then using the process algebra [3] [9] [5] [7] [1] [15], we can code the process theory terms and definitions and take the advantage of the algebra such as automating calculations and running algorithms using parallel computing techniques. The process algebra has vast variety of applications in diverse fields such as performance evaluation [6], safety critical systems [13], network protocols [2] and biology [14]. -
Photorealistic Scene Reconstruction by Voxel Coloring
In Proc. Computer Vision and Pattern Recognition Conf., pp. 1067-1073, 1997. Photorealistic Scene Reconstruction by Voxel Coloring Steven M. Seitz Charles R. Dyer Department of Computer Sciences University of Wisconsin, Madison, WI 53706 g E-mail: fseitz,dyer @cs.wisc.edu WWW: http://www.cs.wisc.edu/computer-vision Broad Viewpoint Coverage: Reprojections should be Abstract accurate over a large range of target viewpoints. This A novel scene reconstruction technique is presented, requires that the input images are widely distributed different from previous approaches in its ability to cope about the environment with large changes in visibility and its modeling of in- trinsic scene color and texture information. The method The photorealistic scene reconstruction problem, as avoids image correspondence problems by working in a presently formulated, raises a number of unique challenges discretized scene space whose voxels are traversed in a that push the limits of existing reconstruction techniques. fixed visibility ordering. This strategy takes full account Photo integrity requires that the reconstruction be dense of occlusions and allows the input cameras to be far apart and sufficiently accurate to reproduce the original images. and widely distributed about the environment. The algo- This criterion poses a problem for existing feature- and rithm identifies a special set of invariant voxels which to- contour-based techniques that do not provide dense shape gether form a spatial and photometric reconstruction of the estimates. While these techniques can produce texture- scene, fully consistent with the input images. The approach mapped models [1, 3, 4], accuracy is ensured only in places is evaluated with images from both inward- and outward- where features have been detected. -
A Sense of Presence: Mediating an American Apocalypse
religions Article A Sense of Presence: Mediating an American Apocalypse Rachel Wagner Department of Philosophy and Religion, Ithaca College, Ithaca, NY 14850, USA; [email protected] Abstract: Here I build upon Robert Orsi’s work by arguing that we can see presence—and the longing for it—at work beyond the obvious spaces of religious practice. Presence, I propose, is alive and well in mediated apocalypticism, in the intense imagination of the future that preoccupies those who consume its narratives in film, games, and role plays. Presence is a way of bringing worlds beyond into tangible form, of touching them and letting them touch you. It is, in this sense, that Michael Hoelzl and Graham Ward observe the “re-emergence” of religion with a “new visibility” that is much more than “simple re-emergence of something that has been in decline in the past but is now manifesting itself once more.” I propose that the “new awareness of religion” they posit includes the mediated worlds that enchant and empower us via deeply immersive fandoms. Whereas religious institutions today may be suspicious of presence, it lives on in the thick of media fandoms and their material manifestations, especially those forms that make ultimate promises about the world to come. Keywords: apocalypticism; Orsi; enchantment; fandom; video games; pervasive games; cowboy; larp; West 1. Introduction Michael Hoelzl and Graham Ward observe the “re-emergence” of religion today with a “new visibility” that is “far more complex and nuanced than simple re-emergence of something that has been in decline in the past but is now manifesting itself once more” (Hoelzl and Ward 2008, p. -
Online Detector Response Calculations for High-Resolution PET Image Reconstruction
Home Search Collections Journals About Contact us My IOPscience Online detector response calculations for high-resolution PET image reconstruction This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2011 Phys. Med. Biol. 56 4023 (http://iopscience.iop.org/0031-9155/56/13/018) View the table of contents for this issue, or go to the journal homepage for more Download details: IP Address: 171.65.80.217 The article was downloaded on 15/06/2011 at 20:11 Please note that terms and conditions apply. IOP PUBLISHING PHYSICS IN MEDICINE AND BIOLOGY Phys. Med. Biol. 56 (2011) 4023–4040 doi:10.1088/0031-9155/56/13/018 Online detector response calculations for high-resolution PET image reconstruction Guillem Pratx1 and Craig Levin2 1 Department of Radiation Oncology, Stanford University, Stanford, CA 94305, USA 2 Departments of Radiology, Physics and Electrical Engineering, and Molecular Imaging Program at Stanford, Stanford University, Stanford, CA 94305, USA E-mail: [email protected] Received 3 January 2011, in final form 19 May 2011 Published 15 June 2011 Online at stacks.iop.org/PMB/56/4023 Abstract Positron emission tomography systems are best described by a linear shift- varying model. However, image reconstruction often assumes simplified shift- invariant models to the detriment of image quality and quantitative accuracy. We investigated a shift-varying model of the geometrical system response based on an analytical formulation. The model was incorporated within a list- mode, fully 3D iterative reconstruction process in which the system response coefficients are calculated online on a graphics processing unit (GPU). -
Intersomatic Awareness in Game Design
The London School of Economics and Political Science Intersomatic Awareness in Game Design Siobhán Thomas A thesis submitted to the Department of Management of the London School of Economics for the degree of Doctor of Philosophy. London, June 2015 1 Declaration I certify that the thesis I have presented for examination for the PhD degree of the London School of Economics and Political Science is solely my own work. The copyright of this thesis rests with the author. Quotation from it is permitted, provided that full acknowledgement is made. This thesis may not be reproduced without my prior written consent. I warrant that this authorisation does not, to the best of my belief, infringe the rights of any third party. I declare that my thesis consists of 66,515 words. 2 Abstract The aim of this qualitative research study was to develop an understanding of the lived experiences of game designers from the particular vantage point of intersomatic awareness. Intersomatic awareness is an interbodily awareness based on the premise that the body of another is always understood through the body of the self. While the term intersomatics is related to intersubjectivity, intercoordination, and intercorporeality it has a specific focus on somatic relationships between lived bodies. This research examined game designers’ body-oriented design practices, finding that within design work the body is a ground of experiential knowledge which is largely untapped. To access this knowledge a hermeneutic methodology was employed. The thesis presents a functional model of intersomatic awareness comprised of four dimensions: sensory ordering, sensory intensification, somatic imprinting, and somatic marking.