The Role of Visual Cues in Body Size Estimation

The Role of Visual Cues in Body Size Estimation PDF

Author: Anne Thaler

Publisher: Logos Verlag Berlin GmbH

Published: 2019-12-15

Total Pages: 204

ISBN-13: 3832550267

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Our body is central to what we define as our self. The mental representation of our physical appearance, often called body image, can have a great influence on our psychological health. Given the increase in body mass index worldwide and the societal pressure to conform to body ideals, it is important to gain a better understanding of the nature of body representations and factors that play a role in body size estimation tasks. This doctoral thesis takes a multifaceted approach for investigating the role of different visual cues in the estimation of own body size and shape by using a variety of experimental methods and novel state-of-the-art computer graphics methods. Two visual cues were considered: visual perspective and identity cues in the visual appearance of a body (shape, and color-information), as well as their interactions with own body size and gender. High ecological validity was achieved by testing body size estimation in natural settings, when looking into a mirror, and by generating biometrically plausible virtual bodies based on 3D body scans and statistical body models, and simulating real-world scenarios in immersive virtual reality.

Measuring, modelling and minimizing perceived motion incongruence for vehicle motion simulation

Measuring, modelling and minimizing perceived motion incongruence for vehicle motion simulation PDF

Author: Diane Cleij

Publisher: Logos Verlag Berlin GmbH

Published: 2020-01-28

Total Pages: 294

ISBN-13: 3832550445

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Humans always wanted to go faster and higher than their own legs could carry them. This led them to invent numerous types of vehicles to move fast over land, water and air. As training how to handle such vehicles and testing new developments can be dangerous and costly, vehicle motion simulators were invented. Motion-based simulators in particular, combine visual and physical motion cues to provide occupants with a feeling of being in the real vehicle. While visual cues are generally not limited in amplitude, physical cues certainly are, due to the limited simulator motion space. A motion cueing algorithm (MCA) is used to map the vehicle motions onto the simulator motion space. This mapping inherently creates mismatches between the visual and physical motion cues. Due to imperfections in the human perceptual system, not all visual/physical cueing mismatches are perceived. However, if a mismatch is perceived, it can impair the simulation realism and even cause simulator sickness. For MCA design, a good understanding of when mismatches are perceived, and ways to prevent these from occurring, are therefore essential. In this thesis a data-driven approach, using continuous subjective measures of the time-varying Perceived Motion Incongruence (PMI), is adopted. PMI in this case refers to the effect that perceived mismatches between visual and physical motion cues have on the resulting simulator realism. The main goal of this thesis was to develop an MCA-independent off-line prediction method for time-varying PMI during vehicle motion simulation, with the aim of improving motion cueing quality. To this end, a complete roadmap, describing how to measure and model PMI and how to apply such models to predict and minimize PMI in motion simulations is presented. Results from several human-in-the-loop experiments are used to demonstrate the potential of this novel approach.

The influence of a self-avatar on space and body perception in immersive virtual reality

The influence of a self-avatar on space and body perception in immersive virtual reality PDF

Author: Ivelina Piryankova

Publisher: Logos Verlag Berlin GmbH

Published: 2015-05-26

Total Pages: 146

ISBN-13: 3832539786

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Technologische Fortschritte in der Computergrafik, dem dreidimensionalen Scannen und in Motion-Tracking-Technologien haben zu einem erhöhten Einsatz von Selbst-Avataren in immersiven virtuellen Realitäten (VR) beigetragen. Selbst-Avatare werden zum Beispiel in den Bereichen Visualisierung und Simulation, aber auch in klinischen Anwendungen oder für Unterhaltungszwecke eingesetzt. Deshalb ist es wichtig neue Erkenntnisse über die Wahrnehmung des eigenen Körpers, des Selbst-Avatars und der räumlichen Wahrnehmung des Benutzers zu gewinnen, sowie den Einfluss des Selbst-Avatars auf die räumliche Wahrnehmung in der virtuellen Welt zu untersuchen. Mit Hilfe von moderner VR-Technologie habe ich untersucht wie Veränderungen des Selbst-Avatars die Wahrnehmung des eigenen Körpers und des Raumes verändern. Die Ergebnisse zeigen, dass Selbst-Avatare nicht genau die gleichen Dimensionen wie der Körper des Benutzers haben müssen, damit sich der Benutzer mit seinem Selbst-Avatar identifizieren kann.

The Importance of the Body-Mind Relationship in Mental Functioning and Development of Body-Focused Disorders in Adolescence, volume II

The Importance of the Body-Mind Relationship in Mental Functioning and Development of Body-Focused Disorders in Adolescence, volume II PDF

Author: Stefania Cella

Publisher: Frontiers Media SA

Published: 2024-06-28

Total Pages: 112

ISBN-13: 2832551009

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This collection is Volume II of the Research Topic The Importance of the Body-Mind Relationship in Mental Functioning and Development of Body-Focused Disorders in Adolescence. Adolescence is a critical period when the conflict between the body and mind becomes particularly pronounced due to the physical changes associated with puberty. These pubescent transformations can affect body image and the perception of self, necessitating a renegotiation of the relationship between body and mind. Failure to navigate this process successfully can lead to dissociation from the sexual body, resulting in feelings of alienation, hatred, disinvestment, and even self-destructive behaviors such as eating disorders, self-injury, and suicide.

Human-Computer Interaction – INTERACT 2019

Human-Computer Interaction – INTERACT 2019 PDF

Author: David Lamas

Publisher: Springer Nature

Published: 2019-08-28

Total Pages: 766

ISBN-13: 3030293904

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The four-volume set LNCS 11746–11749 constitutes the proceedings of the 17th IFIP TC 13 International Conference on Human-Computer Interaction, INTERACT 2019, held in Paphos, Cyprus, in September 2019. The total of 111 full papers presented together with 55 short papers and 48 other papers in these books was carefully reviewed and selected from 385 submissions. The contributions are organized in topical sections named: Part I: accessibility design principles; assistive technology for cognition and neurodevelopment disorders; assistive technology for mobility and rehabilitation; assistive technology for visually impaired; co-design and design methods; crowdsourcing and collaborative work; cyber security and e-voting systems; design methods; design principles for safety/critical systems. Part II: e-commerce; education and HCI curriculum I; education and HCI curriculum II; eye-gaze interaction; games and gamification; human-robot interaction and 3D interaction; information visualization; information visualization and augmented reality; interaction design for culture and development I. Part III: interaction design for culture and development II; interaction design for culture and development III; interaction in public spaces; interaction techniques for writing and drawing; methods for user studies; mobile HCI; personalization and recommender systems; pointing, touch, gesture and speech-based interaction techniques; social networks and social media interaction. Part IV: user modelling and user studies; user experience; users’ emotions, feelings and perception; virtual and augmented reality I; virtual and augmented reality II; wearable and tangible interaction; courses; demonstrations and installations; industry case studies; interactive posters; panels; workshops. The chapter ‘Experiencing Materialized Reading: Individuals’ Encounters with Books’ is open access under a CC BY 4.0 license at link.springer.com. The chapter ‘What Is Beautiful Continues to Be Good: People Images and Algorithmic Inferences on Physical Attractiveness’ is open access under a CC BY 4.0 license at link.springer.com.

Advances in Child Development and Behavior

Advances in Child Development and Behavior PDF

Author:

Publisher: Academic Press

Published: 2017-02-18

Total Pages: 312

ISBN-13: 0128121734

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Advances in Child Development and Behavior, Volume 52, includes chapters that highlight some of the most recent research in the field of developmental psychology. Each chapter provides in-depth discussions, with this volume serving as an invaluable resource for developmental or educational psychology researchers, scholars, and students. Contains chapters that highlight some of the most recent research in the area of child development and behavior Presents a wide array of topics that are discussed in detail

Philosophical Explorations of the Legacy of Alan Turing

Philosophical Explorations of the Legacy of Alan Turing PDF

Author: Juliet Floyd

Publisher: Springer

Published: 2017-05-30

Total Pages: 369

ISBN-13: 3319532804

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Chapters “Turing and Free Will: A New Take on an Old Debate” and “Turing and the History of Computer Music” are available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.

Textbook of Obesity

Textbook of Obesity PDF

Author: Sharon R. Akabas

Publisher: John Wiley & Sons

Published: 2012-03-20

Total Pages: 512

ISBN-13: 1118318382

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Textbook of Obesity is designed to cover all of the essential elements concerning the etiology, prevention and treatment of obesity suitable for students in nutrition, dietetics and health science courses. Providing core knowledge for students is an essential and urgent requirement to ensure that those graduating will be properly equipped to deal with the high prevalence of overweight and obesity, currently affecting almost two-thirds of the population of the USA and with prevalence in much of the rest of the world rapidly catching up. This landmark text is organized into 5 parts comprising 27 chapters, each carefully written in a user-friendly style by experts in the area. Part I helps the reader to understand the scope and complexity of the problem of obesity. Part II focuses on obesity etiology. Part III examines the health consequences of obesity for both children and adults. Part IV discusses the challenge of assessing obesity in humans and offers insights into community factors that influence the risk of obesity. Finally, Part V dedicates 13 chapters to a discussion of a wide variety of obesity prevention and treatment interventions that are currently in use. Textbook of Obesity is an essential purchase for students and the many health professionals dealing with obesity on a day-to-day basis. A dedicated companion website features an extensive bank of questions and answers for readers to test their understanding, and all of the book’s illustrations for instructors to download: www.wiley.com/go/akabas/obesity

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