DOCSLIB.ORG

A Vision-Based Approach for Human Hand Tracking and Gesture Recognition

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
A Vision-Based Approach for Human Hand Tracking and Gesture Recognition University of Windsor Scholarship at UWindsor Electronic Theses and Dissertations Theses, Dissertations, and Major Papers 2004 A vision-based approach for human hand tracking and gesture recognition. Jiangnan Lu University of Windsor Follow this and additional works at: https://scholar.uwindsor.ca/etd Recommended Citation Lu, Jiangnan, "A vision-based approach for human hand tracking and gesture recognition." (2004). Electronic Theses and Dissertations. 871. https://scholar.uwindsor.ca/etd/871 This online database contains the full-text of PhD dissertations and Masters’ theses of University of Windsor students from 1954 forward. These documents are made available for personal study and research purposes only, in accordance with the Canadian Copyright Act and the Creative Commons license—CC BY-NC-ND (Attribution, Non-Commercial, No Derivative Works). Under this license, works must always be attributed to the copyright holder (original author), cannot be used for any commercial purposes, and may not be altered. Any other use would require the permission of the copyright holder. Students may inquire about withdrawing their dissertation and/or thesis from this database. For additional inquiries, please contact the repository administrator via email ([email protected]) or by telephone at 519-253-3000ext. 3208. A Vision-Based Approach for Human Hand Tracking and Gesture Recognition By Jiangnan Lu A Thesis Submitted to the Faculty of Graduate Studies and Research through Computer Science in Partial Fulfillment of the Requirements for the Degree of Master of Science at the University of Windsor Windsor, Ontario, Canada 2004 © 2004 Jiangnan Lu Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Library and Bibliotheque et 1*1 Archives Canada Archives Canada Published Heritage Direction du Branch Patrimoine de I'edition 395 Wellington Street 395, rue Wellington Ottawa ON K1A 0N4 Ottawa ON K1A 0N4 Canada Canada Your file Votre reference ISBN: 0-612-96121-4 Our file Notre reference ISBN: 0-612-96121-4 The author has granted a non­ L'auteur a accorde une licence non exclusive license allowing the exclusive permettant a la Library and Archives Canada to Bibliotheque et Archives Canada de reproduce, loan, distribute or sell reproduire, preter, distribuer ou copies of this thesis in microform, vendre des copies de cette these sous paper or electronic formats. la forme de microfiche/film, de reproduction sur papier ou sur format electronique. The author retains ownership of theL'auteur conserve la propriete du copyright in this thesis. Neither thedroit d'auteur qui protege cette these. thesis nor substantial extracts from Niit la these ni des extraits substantiels may be printed or otherwise de celle-ci ne doivent etre imprimes reproduced without the author's ou aturement reproduits sans son permission. autorisation. In compliance with the Canadian Conformement a la loi canadienne Privacy Act some supporting sur la protection de la vie privee, forms may have been removed quelques formulaires secondaires from this thesis. ont ete enleves de cette these. While these forms may be includedBien que ces formulaires in the document page count, aient inclus dans la pagination, their removal does not represent il n'y aura aucun contenu manquant. any loss of content from the thesis. Canada Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Master Thesis A Vision-Based Approach for Human Hand Tracking and Gesture Recognition Abstract Hand gesture interface has been becoming an active topic of human-computer interaction (HCI). The utilization of hand gestures in human-computer interface enables human operators to interact with computer environments in a natural and intuitive manner. In particular, bare hand interpretation technique frees users from cumbersome, but typically required devices in communication with computers, thus offering the ease and naturalness in HCI. Meanwhile, virtual assembly (VA) applies virtual reality (VR) techniques in mechanical assembly. It constructs computer tools to help product engineers planning, evaluating, optimizing, and verifying the assembly of mechanical systems without the need of physical objects. However, traditional devices such as keyboards and mice are no longer adequate due to their inefficiency in handling three-dimensional (3D) tasks. Special VR devices, such as data gloves, have been mandatory in VA. This thesis proposes a novel gesture-based interface for the application of VA. It develops a hybrid approach to incorporate an appearance-based hand localization technique with a skin tone filter in support of gesture recognition and hand tracking in the 3D space. With this interface, bare hands become a convenient substitution of special VR devices. Experiment results demonstrate the flexibility and robustness introduced by the proposed method to HCI. iii Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Master Thesis A Vision-Based Approach for Human Hand Tracking and Gesture Recognition DEDICATED To my parents, my friends and all who love me and beloved iv Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Master Thesis A Vision-Based Approach for Human Hand Tracking and Gesture Recognition Acknowledgements I must begin by acknowledging my supervisor, Dr. Xiaobu Yuan, for sharing his wisdom and his experience while giving me constant advice throughout my study. I am also grateful to him for giving me the artistic freedom necessary to realize this task. I would like to extend my sincere appreciation to my committee members, Dr. Fritz Rieger and Dr. Christie Ezeife, for all their kind help, encouragement and guidance. My special thanks go to Yingxin Xia for her understanding and unbelievable supports. Finally, I would like to express thanks to all others who have helped me to overcome the many technical difficulties in preparing this thesis. v Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Master Thesis A Vision-Based Approach for Human Hand Tracking and Gesture Recognition Table of Contents ABSTRACT............................................................................................... iii DEDICATION........................................................................................... iv ACKNOWLEDGEMENT..........................................................................v LIST OF FIGURES..................................................................................vii 1. INTRODUCTION............................................................................... 1 1.1 Previous Work........................................................................................................ 2 1.1.1 Vision-Based Hand Gesture Interface Architecture ..........................................3 1.1.2 State-of-Art...................................................................................................... 4 1.2 Contributions.......................................................................................................... 6 1.3 Outline of Thesis.................................................................................................... 6 2. HAND GESTURE MODELING.........................................................8 2.1 Hand Gesture Definition ......................................................................................... 8 2.2 Gesture Categorization..........................................................................................10 2.3 3D-based Gesture Modeling ..................................................................................12 2.4 Appearance-based Gesture Modeling .................................................................... 13 3. GESTURE ANALYSIS FOR HAND LOCALIZATION................15 3.1 Color-based Gesture Analysis ...............................................................................15 3.1.1 Skin Color Histogram.....................................................................................16 3.1.2 Color Space........................... 17 3.1.3 Color space reduction and transformation.......................................................18 3.1.4 Limitations......................................................................................................18 3.2 Motion-based Gesture Analysis ............................................................................ 19 3.2.1 Image Differencing.........................................................................................19 3.2.2 Background Image Generation.......................................................................20 3.3 A Hybrid Model for Hand Localization................................................................21 4. 3D HAND POSITION TRACKING.................................................22 4.1 Feature Selection and Detection............................................................................22 4.1.1 Fingertips.......................................................................................................23 4.1.2 Silhouettes and Contours............................................................................... 23 4.1.3 3D-based Feature Estimation ..........................................................................24 4.2 Projective Geometry............................................................................................
Load more

Recommended publications
  • Inverse Kinematic Infrared Optical Finger Tracking
    Inverse Kinematic Infrared Optical Finger Tracking Gerrit Hillebrand1, Martin Bauer2, Kurt Achatz1, Gudrun Klinker2 1Advanced Realtime Tracking GmbH ∗ Am Oferl¨ 3 Weilheim, Germany 2Technische Universit¨atM¨unchen Institut f¨urInformatik Boltzmannstr. 3, 85748 Garching b. M¨unchen, Germany e·mail: [email protected] Abstract the fingertips are tracked. All further parameters, such as the angles between the phalanx bones, are Human hand and finger tracking is an important calculated from that. This approach is inverse input modality for both virtual and augmented compared to the current glove technology and re- reality. We present a novel device that overcomes sults in much better accuracy. Additionally, the the disadvantages of current glove-based or vision- device is lightweight and comfortable to use. based solutions by using inverse-kinematic models of the human hand. The fingertips are tracked by an optical infrared tracking system and the pose of the phalanxes is calculated from the known anatomy of the hand. The new device is lightweight and accurate and allows almost arbitrary hand movement. Exami- nations of the flexibility of the hand have shown that this new approach is practical because ambi- guities in the relationship between finger tip posi- tions and joint positions, which are theoretically possible, occur only scarcely in practical use. Figure 1: The inverse kinematic infrared optical finger tracker Keywords: Optical Tracking, Finger Tracking, Motion Capture 1 Introduction 1.1 Related Work While even a standard keyboard can be seen For many people, the most important and natural as an input device based on human finger mo- way to interact with the environment is by using tion, we consider only input methods that allow their hands.
    [Show full text]
  • Airpen: a Touchless Fingertip Based Gestural Interface for Smartphones and Head-Mounted Devices
    AirPen: A Touchless Fingertip Based Gestural Interface for Smartphones and Head-Mounted Devices Varun Jain Ramya Hebbalaguppe [email protected] [email protected] TCS Research TCS Research New Delhi, India New Delhi, India ABSTRACT Hand gestures are an intuitive, socially acceptable, and a non-intrusive interaction modality in Mixed Reality (MR) and smartphone based applications. Unlike speech interfaces, they tend to perform well even in shared and public spaces. Hand gestures can also be used to interact with smartphones in situations where the user’s ability to physically touch the device is impaired. However, accurate gesture recognition can be achieved through state-of-the-art deep learning models or with the use of expensive sensors. Despite the robustness of these deep learning models, they are computationally heavy and memory hungry, and obtaining real-time performance on-device without additional hardware is still a challenge. To address this, we propose AirPen: an analogue to pen on paper, but in air, for in-air writing and gestural commands that works seamlessly in First and Second Person View. The models are trained on a GPU machine and ported on an Android smartphone. AirPen comprises of three deep learning models that work in tandem: MobileNetV2 for hand localisation, our custom fingertip regression architecture followed by a Bi-LSTM model for gesture classification. The overall framework works in real-time on mobile devices and achieves a classification accuracy of 80% with an average latency of only 0:12 s. Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page.
    [Show full text]
  • Auraring: Precise Electromagnetic Finger Tracking
    AuraRing: Precise Electromagnetic Finger Tracking FARSHID SALEMI PARIZI∗, ERIC WHITMIRE∗, and SHWETAK PATEL, University of Washington Fig. 1. AuraRing is 5-DoF electromagnetic tracker that enables precise, accurate, and fine-grained finger tracking for AR, VR and wearable applications. Left: A user writes the word "hello" in the air. Right: Using AuraRing to play a songinamusic application on a smart glass. Wearable computing platforms, such as smartwatches and head-mounted mixed reality displays, demand new input devices for high-fidelity interaction. We present AuraRing, a wearable magnetic tracking system designed for tracking fine-grained finger movement. The hardware consists of a ring with an embedded electromagnetic transmitter coil and a wristband with multiple sensor coils. By measuring the magnetic fields at different points around the wrist, AuraRing estimates thefive degree-of-freedom pose of the ring. We develop two different approaches to pose reconstruction—a first-principles iterative approach and a closed-form neural network approach. Notably, AuraRing requires no runtime supervised training, ensuring user and session independence. AuraRing has a resolution of 0:1 mm and a dynamic accuracy of 4:4 mm, as measured through a user evaluation with optical ground truth. The ring is completely self-contained and consumes just 2:3 mW of power. CCS Concepts: • Human-centered computing → Interaction devices; Ubiquitous and mobile computing. Additional Key Words and Phrases: Electromagnetic tracking, mixed reality, wearable, input, finger tracking ACM Reference Format: Farshid Salemi Parizi, Eric Whitmire, and Shwetak Patel. 2019. AuraRing: Precise Electromagnetic Finger Tracking. Proc. ACM Interact. Mob. Wearable Ubiquitous Technol. 3, 4, Article 150 (December 2019), 28 pages.
    [Show full text]
  • Lightweight Palm and Finger Tracking for Real-Time 3D Gesture Control
    Lightweight Palm and Finger Tracking for Real-Time 3D Gesture Control Georg Hackenberg* Rod McCall‡ Wolfgang BrollD Fraunhofer FIT Fraunhofer FIT Fraunhofer FIT Freehand multi-touch has been explored within various ABSTRACT approaches, e.g. Oblong’s g-speak1, after initially having been We present a novel technique implementing barehanded introduced in the popular Hollywood movie “Minority Report”. interaction with virtual 3D content by employing a time-of-flight They usually depended heavily on hand-worn gloves, markers, camera. The system improves on existing 3D multi-touch systems wrists, or other input devices, and typically did not achieve the by working regardless of lighting conditions and supplying a intuitiveness, simplicity and efficiency of surface (2D) based working volume large enough for multiple users. Previous multi-touch techniques2. In contrast to those approaches, the goal systems were limited either by environmental requirements, of our approach was to use barehanded interaction as a working volume, or computational resources necessary for real- replacement for surface based interaction. time operation. By employing a time-of-flight camera, the system Only a vision-based approach will allow for freehand and is capable of reliably recognizing gestures at the finger level in barehanded 3D multi-touch interaction. The system must also real-time at more than 50 fps with commodity computer hardware provide sufficient solutions for the following four steps: detection using our newly developed precision hand and finger-tracking of hand position without prior knowledge of existence; for each algorithm. Building on this algorithm, the system performs appearance determine pose from image cues; track appearances gesture recognition with simple constraint modeling over over time; recognize gestures based on their trajectory and pose statistical aggregations of the hand appearances in a working information.
    [Show full text]
  • Perception-Action Loop in the Experience of Virtual Environments
    Perception-Action Loop in the Experience of Virtual Environments by Seung Wook Kim A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Architecture and the Designated Emphasis in New Media in the Graduate Division of the University of California, Berkeley Committee in charge: Professor Yehuda E. Kalay, Chair Professor Galen Cranz Professor John F. Canny Fall 2009 Abstract Perception-Action Loop in the Experience of Virtual Environments by Seung Wook Kim Doctor of Philosophy in Architecture and the Designated Emphasis in New Media University of California, Berkeley Professor Yehuda Kalay, Chair The goal of this work is to develop an approach to the design of natural and immersive interaction methods for three-dimensional virtual environments. My thesis is that habitation and presence in any environment are based on a continuous process of perception and action between a person and his/her surroundings. The current practice of virtual environments, however, disconnects this intrinsic loop, separating perception and action into two different ‘worlds’—a physical one (for perception) and a virtual one (for action). This research is aimed at bridging the gap between those two worlds. Being drawn from perceptual philosophy and psychology, the theoretical study in this dissertation identifies three embodiments of natural perception-action loop: direct perceptual acts, proprioceptive locomotion, and motor intentionality. These concepts form the basis for the interaction methods proposed in this work, and I demonstrate these methods by implementing pertinent prototype systems. First, I suggest a view-dependent, non-planar display space that supports natural perceptual actions, thereby enhancing our field of view as well as depth perception.
    [Show full text]
  • Finger Tracking for Interaction in Augmented Environments
    Finger tracking for interaction in augmented environments ;+ + Klaus Dorfmuller-Ulhaas¨ ∗ , Dieter Schmalstieg ∗Imagination Computer Services, Austria +Vienna University of Technology, Austria klaus, dieter @ims.tuwien.ac.at f g Abstract 1 Introduction In order to convey a sense of immersion, a virtual envi- Optical tracking systems allow three-dimensional input ronment (VE) system must not only present a convincing for virtual environment applications with high precision and visual rendering of the simulated objects, but also allow to without annoying cables. Spontaneous and intuitive inter- manipulate them in a fast, precise, and natural way. Rather action is possible through gestures. In this paper, we present than relying on mouse or keyboard, direct manipulation of a finger tracker that allows gestural interaction and is sim- virtual objects is enabled by employing tracking with six de- ple, cheap, fast, robust against occlusion and accurate. It grees of freedom (6DOF). Frequently, this is done via hand- is based on a marked glove, a stereoscopic tracking system held props (such as flying mouse or wand) that are fitted and a kinematic 3-d model of the human finger. Within our with magnetic trackers. However, this technology can only augmented reality application scenario, the user is able to offer limited quality because it is inherently tethered, inac- grab, translate, rotate, and release objects in an intuitive curate and susceptible to magnetic interference. Early on, way. We demonstrate our tracking system in an augmented optical tracking has been proposed as an alternative. One reality chess game allowing a user to interact with virtual main reason why optical tracking is so attractive is because objects.
    [Show full text]
  • Arxiv:2103.04380V1 [Cs.HC] 7 Mar 2021 Environmental Context and Interaction Context As Much As Possible
    A Full Body Avatar-Based Telepresence System for Dissimilar Spaces Leonard Yoon* Dongseok Yang† Korea Advanced Institute of Science and Technology Korea Advanced Institute of Science and Technology Choongho Chung‡ Sung-Hee Lee§ Korea Advanced Institute of Science and Technology Korea Advanced Institute of Science and Technology Figure 1: Our telepresence system allows for different room environments by retargeting the user’s placement and deictic gesture to the remote avatar so as to preserve the user’s context of placement and interaction. In this figure, a user in the left space is sitting facing a display and pointing at a point in the display. The user is represented in the right space by a male avatar sitting on the right side of a display, pointing at the corresponding point in the display. A user sitting in front of the display in the right space is represented by a female avatar sitting to the left of the display in the left space. Small figures are user’s egocentric views. ABSTRACT However, in the case of using a whole space of two rooms with We present a novel mixed reality (MR) telepresence system enabling different shapes and object arrangements, directly placing an avatar a local user to interact with a remote user through full-body avatars with respect to the spatial relation between a user, an avatar, and in their own rooms. If the remote rooms have different sizes and shared objects of interest may cause a discrepancy, for instance, an furniture arrangements, directly applying a user’s motion to an avatar avatar sitting in the air or penetrating some objects.
    [Show full text]
  • Fine-Grained Device-Free Tracking Using Acoustic Signals
    Strata: Fine-Grained Device-Free Tracking Using Acoustic Signals ABSTRACT it is more natural to play games and interact with VR/AR Next generation devices, such as virtual reality (VR), aug- objects using hands directly. mented reality (AR), and smart appliances, demand a simple and intuitive way for users to interact with them. To ad- Challenges: Enabling accurate device-free tracking is par- dress such needs, we develop a novel acoustic based device- ticularly challenging. In such a case, reflected signal has to free tracking system, called Strata, to enable a user to inter- be used for tracking. Reflected signal is much weaker than act with a nearby device by simply moving his finger. In the directly received signal (e.g., in free space, the directly 2 Strata, a mobile (e.g., smartphone) transmits known audio received signal attenuates by 1=d whereas the reflected sig- 4 signals at an inaudible frequency, and analyzes the received nal attenuates by 1=d , where d is the distance between the signal reflected by the moving finger to track the finger loca- device and the target to be tracked). Moreover, it is more dif- tion. To explicitly take into account multipath propagation, ficult to handle multiple reflection paths in device-free track- the mobile estimates the channel impulse response (CIR), ing. In device-based tracking, one may rely on finding the which characterizes signal traversal paths with different de- first arriving signal since the straight-line path between the lays. Each channel tap corresponds to the multipath effects sender and receiver is shortest.
    [Show full text]
  • Implementation of a 3D Hand Pose Estimation System John-Certus Lack BJ.: 2014 Institut Für Robotik Und Mechatronik IB.Nr.: 572-2014-22
    Drucksachenkategorie Pose Estimation System Estimation Pose 3D Hand a of Implementation John-Certus Lack BJ.: 2014 Institut für Robotik und Mechatronik IB.Nr.: 572-2014-22 BACHELORARBEIT IMPLEMENTATION OF A 3D HAND POSE ESTIMATION SYSTEM Freigabe: Der Bearbeiter: John-Certus Lack Betreuer: Dr.-Ing. Ulrike Thomas Der Institutsdirektor Dr. Alin Albu-Schäffer Dieser Bericht enthält 65 Seiten, 41 Abbildungen und 7 Tabellen Ort: Oberpfaffenhofen Datum: 28.08.2014 Bearbeiter: John-Certus Lack Zeichen: 74703 Technische Universit¨at Munchen¨ Institute for Media Technology Prof. Dr.-Ing. Eckehard Steinbach Bachelor Thesis Implementation of a 3D Hand Pose Estimation System Author: John-Certus Lack Matriculation Number: 03620284 Address: Steinickeweg 7 80798 Munich Advisor: M.Sc. Nicolas Alt (TUM) Dr.-Ing. Ulrike Thomas (DLR) Begin: 01.04.2014 End: 11.09.2014 Abstract Chair of Media Technology Bachelor of Science Implementation of a 3D Hand Pose Estimation System by John-Certus Lack The variety of means for human-computer interaction has experienced a surge in recent years and currently covers several methods for haptic communication and voice control. These technologies have proven to be a vital tool for information exchange and are already a fundamental part of daily human interaction. However, they are mainly restricted to a two dimensional input and the interpretation of formulated commands. To overcome these limitations, several approaches of 3D hand pose detection systems were made that often imply computation intensive models or large databases with synthetic training sets. Therefore, this thesis presents a 3D hand pose estimation system that provides real-time processing at low computational cost. The first parts describes methods for the hand-background segmentation and the tracking of specific feature points, which include the center of the palm and the fingertips.
    [Show full text]
  • Exploring 3D User Interface Technologies for Improving the Gaming Experience
    EXPLORING 3D USER INTERFACE TECHNOLOGIES FOR IMPROVING THE GAMING EXPERIENCE by ARUN KUMAR KULSHRESHTH M.S. University of Central Florida, 2012 M.Tech. Indian Institute of Technology Delhi, 2005 A dissertation submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in the Department of Computer Science in the College of Engineering & Computer Science at the University of Central Florida Orlando, Florida Spring Term 2015 Major Professor: Joseph J. LaViola Jr. c 2015 Arun Kumar Kulshreshth ii ABSTRACT 3D user interface technologies have the potential to make games more immersive & engaging and thus potentially provide a better user experience to gamers. Although 3D user interface technolo- gies are available for games, it is still unclear how their usage affects game play and if there are any user performance benefits. A systematic study of these technologies in game environments is required to understand how game play is affected and how we can optimize the usage in order to achieve better game play experience. This dissertation seeks to improve the gaming experience by exploring several 3DUI technologies. In this work, we focused on stereoscopic 3D viewing (to improve viewing experience) coupled with motion based control, head tracking (to make games more engaging), and faster gesture based menu selection (to reduce cognitive burden associated with menu interaction while playing). We first studied each of these technologies in isolation to understand their benefits for games. We present the results of our experiments to evaluate benefits of stereoscopic 3D (when coupled with motion based control) and head tracking in games. We discuss the reasons behind these findings and provide recommendations for game designers who want to make use of these technologies to enhance gaming experiences.
    [Show full text]
  • A Systematic Review of Commercial Smart Gloves: Current Status and Applications
    sensors Review A Systematic Review of Commercial Smart Gloves: Current Status and Applications Manuel Caeiro-Rodríguez * , Iván Otero-González , Fernando A. Mikic-Fonte and Martín Llamas-Nistal atlanTTic Research Center for Telecommunication Technologies, Universidade de Vigo, 36312 Vigo, Spain; [email protected] (I.O.-G.); [email protected] (F.A.M.-F.); [email protected] (M.L.-N.) * Correspondence: [email protected]; Tel.: +34-683-243-422 Abstract: Smart gloves have been under development during the last 40 years to support human- computer interaction based on hand and finger movement. Despite the many devoted efforts and the multiple advances in related areas, these devices have not become mainstream yet. Nevertheless, during recent years, new devices with improved features have appeared, being used for research purposes too. This paper provides a review of current commercial smart gloves focusing on three main capabilities: (i) hand and finger pose estimation and motion tracking, (ii) kinesthetic feedback, and (iii) tactile feedback. For the first capability, a detailed reference model of the hand and finger basic movements (known as degrees of freedom) is proposed. Based on the PRISMA guidelines for systematic reviews for the period 2015–2021, 24 commercial smart gloves have been identified, while many others have been discarded because they did not meet the inclusion criteria: currently active commercial and fully portable smart gloves providing some of the three main capabilities for the whole hand. The paper reviews the technologies involved, main applications and it discusses about the current state of development. Reference models to support end users and researchers comparing and selecting the most appropriate devices are identified as a key need.
    [Show full text]
  • Fingartips – Gesture Based Direct Manipulation in Augmented Reality
    FingARtips – Gesture Based Direct Manipulation in Augmented Reality Volkert Buchmann† Stephen Violich‡ Mark Billinghurst* Andy Cockburn§ HIT Lab NZ University of HIT Lab NZ University of Canterbury, NZ Canterbury, NZ Abstract been little research on the use of free hand interaction. Since hands are our main means of interaction with objects in real life, This paper presents a technique for natural, fingertip-based AR interfaces should also allow for free hand interaction with interaction with virtual objects in Augmented Reality (AR) virtual objects. This would not only enable natural and intuitive environments. We use image processing software and finger- and interaction with virtual objects, but it would also help to ease the hand-based fiducial markers to track gestures from the user, transition between interaction with real and virtual objects at the stencil buffering to enable the user to see their fingers at all times, same time. In this paper we present techniques for free hand and fingertip-based haptic feedback devices to enable the user to interaction with AR content. feel virtual objects. Unlike previous AR interfaces, this approach allows users to interact with virtual content using natural hand We can distinguish between two different interaction spaces for gestures. The paper describes how these techniques were applied hand based interaction: near space and far space. Near objects are in an urban planning interface, and also presents preliminary within arm’s reach and can be manipulated intuitively. Far objects informal usability results. are no longer within arm’s reach and cannot be manipulated with a hand in real life. There are other range-based AR and Virtual CR Categories: H.5.1 [Information Systems]: Multimedia Reality (VR) techniques that are more appropriate for selection Information Systems – Artificial, augmented, and virtual realities; and manipulation of far objects, such as ray based selection.
    [Show full text]