- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Indoor Navigation With Virtual Graph Representation: Exploiting Peak Intensities of Unmodulated Luminaries
摘要： The ubiquitous luminaries provide a new dimension for indoor navigation, as they are often well-structured and the visible light is reliable for its multipath-free nature. However, existing visible light-based technologies, which are generally frequency-based, require the modulation on light sources, modification to the device, or mounting extra devices. The combination of the cost-extensive floor map and the localization system with constraints on customized hardwares for capturing the flashing frequencies, no doubt, hinders the deployment of indoor navigation systems at scale in, nowadays, smart cities. In this paper, we provide a new perspective of indoor navigation on top of the virtual graph representation. The main idea of our proposed navigation system, named PILOT, stems from exploiting the peak intensities of ubiquitous unmodulated luminaries. In PILOT, the pedestrian paths with enriched sensory data are organically integrated to derive a meaningful graph, where each vertex corresponds to a light source and pairwise adjacent vertices (or light sources) form an edge with a computed length and direction. The graph, then, serves as a global reference frame for indoor navigation while avoiding the usage of pre-deployed floor maps, localization systems, or additional hardwares. We have implemented a prototype of PILOT on the Android platform, and extensive experiments in typical indoor environments demonstrate its effectiveness and efficiency.
关键词： pervasive computing,Human computer interaction,ubiquitous computing,computational and artificial intelligence
更新于2025-09-23 15:23:52
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[IEEE 2018 IEEE Conference on Virtual Reality and 3D User Interfaces (VR) - Reutlingen (2018.3.18-2018.3.22)] 2018 IEEE Conference on Virtual Reality and 3D User Interfaces (VR) - Casting Virtual Shadows Based on Brightness Induction for Optical See-Through Displays
摘要： This paper proposes a novel method for casting virtual shadows on real surfaces on an optical see-through head-mounted display without any extra physical filter devices. Instead, the method presents shadows as results of brightness induction. To produce brightness induction, we place a texture of the real scene with a certain transparency around the shadow area to amplify the luminance of the surrounding area. To make this amplification unnoticeable, the transparency of the surrounding region is gradually increased as the distance from the shadow region. In the experiment with 23 participants, we confirmed that users tend to perceive the shadow region is darker than a non-shadow area under the conditions where a circular virtual shadow is placed on a flat surface.
关键词： Interaction paradigms,Displays and imagers,Mixed / augmented reality,Interaction devices,Human-computer interaction (HCI),Human-centered computing
更新于2025-09-23 15:22:29
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[IEEE 2018 International Flexible Electronics Technology Conference (IFETC) - Ottawa, ON, Canada (2018.8.7-2018.8.9)] 2018 International Flexible Electronics Technology Conference (IFETC) - Deformable User Interfaces: Using Flexible Electronics for Human Computer Interaction
摘要： Deformable inputs offer users the ability to physically manipulate a device for system interaction. We combine flexible electronic technologies with human computer interaction to study how changing the form factor of digital devices can offer new interaction techniques to users. We introduce our research on deformable user interfaces by discussing bend gestures as a source of input, presenting our process to rapidly prototype flexible devices, and demonstrate three deformable user interfaces: bend passwords, bend for mobile games, and bend for vision impaired users. We show how flexible devices and deformable interactions can improve how we interact with our devices.
关键词： Human Computer Interaction,Flexible Electronics,Deformable User Interfaces
更新于2025-09-23 15:22:29
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A camera based human computer interaction through virtual keyboard assistant
摘要： Human Computer Interaction has evolved with time and exploited almost all the possible relationships that human can have with computers. The present scenario of using the computer is often inaccessible to people with severe motor impairment, which cannot inhabit the traditional keyboard and mouse, and require another specialized input device. A Camera mouse Human-Computer Interface (HCI) based virtual assistant is designed and planned to be evaluated with 15 subjects and hoped to work for individuals with advanced Amyotrophic Lateral Sclerosis (ALS), all of whom were given tasks to execute through the virtual assistant. In the proposed system, this includes primarily, a virtual keyboard with an embedded Internet browser. The virtual keyboard allows users with movement impairments, basically hand movement issues, to directly interact with the computer. The keyboard has varied functions, apart from just typing; namely, searching anything on google, login to social media and checking emails, text to speech facilities and has a database that holds all the basic helper commands for the person. The camera mouse is software that allows people to interact with the computer by registering any part of their body and then using that part as the pointing device to work on the computer system. The participants of the evaluation will be both, subjects that have knowledge about the HCI interface and those completely new to it. We define additional criteria for unrestricted internet access for evaluation of the presented and future internet browsers, Camera based browser provides unrestricted access and enables free web surfing for individuals with motor impairments. This system improves the subject’s quality of life and provides uninterrupted access for the subject to use the computer.
关键词： Camera,Virtual keyboard,Graphical User Interface,Human computer Interaction
更新于2025-09-23 15:22:29
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New Impressions in Interaction Design: A Task Taxonomy for Elastic Displays
摘要： Novel shape-changing interfaces promise to provide a rich haptic experience for human-computer interaction. As a specific instance of shape-changing interfaces, Elastic Displays provide large interaction surfaces that can be temporally deformed using force-touch. The unique property of these displays is that they automatically return to their initial flat state. Recently, several review and position papers have stimulated a discussion towards consolidating the knowledge about shape-changing interfaces. The knowledge about Elastic Displays is similarly scattered across multiple publications from recent years. This paper contributes a task taxonomy based on productive uses of Elastic Displays found in literature, on the web, and in our interaction lab. This taxonomy emphasizes tasks, but also encompasses general aspects regarding content types, visualization technology, and interaction styles. All aspects of the taxonomy are illustrated using case studies from literature.
关键词： Task Taxonomy,Organic User Interfaces,Human-computer Interaction,Physics-based Interaction,Shape-changing Interfaces,Interaction Design,Tangible Interaction,Elastic Displays
更新于2025-09-23 15:21:01
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Detecting task demand via an eye tracking machine learning system
摘要： Computerized systems play a significant role in today’s fast-paced digital economy. Because task demand is a major factor that influences how computerized systems are used to make decisions, identifying task demand automatically provides an opportunity for designing advanced decision support systems that can respond to user needs at a personalized level. A first step for designing such advanced decision tools is to investigate possibilities for developing automatic task load detectors. Grounded in decision making, eye tracking, and machine learning literature, we argue that task demand can be detected automatically, reliably, and unobtrusively using eye movements only. To investigate this possibility, we developed an eye tracking task load detection system and tested its effectiveness. Our results revealed that our task load detection system reliably predicted increased task demand from users’ eye movement data. These results and their implications for research and practice are discussed.
关键词： task demand,human computer interaction,cognitive effort,adaptive decision making,eye tracking,machine learning
更新于2025-09-23 15:21:01
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Photoinduced phase segregation and degradation of perovskites revealed by x-ray photoelectron spectroscopy
摘要： A study was conducted to investigate the criterion validity of measures of upper extremity (UE) motor function derived during practice of virtual activities of daily living (ADLs). Fourteen hemiparetic stroke patients employed a Virtual Occupational Therapy Assistant (VOTA), consisting of a high-fidelity virtual world and a Kinect? sensor, in four sessions of approximately one hour in duration. An unscented Kalman Filter-based human motion tracking algorithm estimated UE joint kinematics in real-time during performance of virtual ADL activities, enabling both animation of the user's avatar and automated generation of metrics related to speed and smoothness of motion. These metrics, aggregated over discrete sub-task elements during performance of virtual ADLs, were compared to scores from an established assessment of UE motor performance, the Wolf Motor Function Test (WMFT). Spearman's rank correlation analysis indicates a moderate correlation between VOTA-derived metrics and the time-based WMFT assessments, supporting the criterion validity of VOTA measures as a means of tracking patient progress during an UE rehabilitation program that includes practice of virtual ADLs.
关键词： Human computer interaction,occupational therapy,patient rehabilitation,human motion tracking,virtual reality,human motor performance
更新于2025-09-23 15:19:57
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Optical Mouse Sensor for Eye Blink Detection and Pupil Tracking: Application in a Low-Cost Eye-Controlled Pointing Device
摘要： In this paper, a new application of the optical mouse sensor is presented. The optical mouse is used as a main low-cost infrared vision system of a new proposal of a head-mounted human-computer interaction (HCI) device controlled by eye movements. The default optical mouse sensor lens and illumination source are replaced in order to improve its ?eld of view and capture entire eye images. A complementary 8-bit microcontroller is used to acquire and process these images with two optimized algorithms to detect forced eye blinks and pupil displacements which are translated to computer pointer actions. This proposal introduces an inexpensive and approachable plug and play (PnP) device for people with severe disability in the upper extremities, neck, and head. The presented pointing device performs standard computer mouse actions with no extra software required. It uses the human interface device (HID) standard class of the universal serial bus (USB) increasing its compatibility for most computer platforms. This new device approach is aimed at improving comfortability and portability of the current commercial devices with simple installation and calibration. Several performance tests were done with di?erent volunteer users obtaining an average pupil detection error of 0.34 pixels with a successful detection in 82.6% of all mouse events requested by means of pupil tracking.
关键词： human-computer interaction,low-cost device,optical mouse sensor,pupil tracking,eye blink detection
更新于2025-09-23 15:19:57
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Research and design of low-power grid-connected PV power generation system based on automatic solar tracking
摘要： A low-power grid-connected photovoltaic (PV) power generation system based on automatic solar tracking is designed in this paper. In order to increase the level of accuracy of automatic solar tracking, the part of automatic solar tracking adopts the method of hybrid tracking and uses pin-cushion two-dimensional position sensitive detector plus four silicon PV cells as the photosensitive element. An adaptive topological structure of the main circuit based on a cascaded Boost converter circuit and the H6-type inverter topology are designed for the system to obtain a better working condition. Then an MPPT algorithm combined modified constant voltage algorithm with modified variable step-size increment conductance algorithm is proposed in order to improve the efficiency of PV power generation. The experimental results showed the effectiveness of the control system. Finally, the hardware and software of the system are also designed. Moreover, a graphic interface made with the LabVIEW software allows the user to monitor and save the data in a file.
关键词： Automatic solar tracking,human–computer interaction,H6-type inverter topology,pin-cushion PSD,PV grid-connected,MPPT
更新于2025-09-19 17:15:36
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[IEEE 2019 IEEE International Conference on Electro Information Technology (EIT) - Brookings, SD, USA (2019.5.20-2019.5.22)] 2019 IEEE International Conference on Electro Information Technology (EIT) - Characterization of the response of Perovskite solar cells to gamma rays and neutrons
摘要： Touch plays a prominent role in communicating emotions and intensifying interpersonal communication. Affective haptics is an emerging ?eld, which focuses on the analysis, design, and evaluation of systems that can capture, process, or display emotions through the sense of touch. The objective of this paper is to present an overview of the recent achievements in affective haptics and to discuss how the sense of touch can elicit or in?uence human emotions. We ?rst introduce a de?nition to the term affective haptics and describe its multidisciplinary nature—as a ?eld that integrates ideas from affective computing, haptic technology, and user experience. Second, we provide a thorough discussion about the effectiveness of using the haptic channel to communicate affective information through direct and mediated means. Third, we present a variety of applications in the area ranging from interhuman social interaction systems to human robot interaction applications. Finally, we discuss some of the key ?ndings discerned from the various surveyed papers, and present some of the challenges and trends in this ?eld. We extract the following conclusions pertaining to affective haptics: 1) haptic stimulation can be successfully used to achieve a higher level of emotional immersion during media consumption or emotional telepresence; 2) existing research has demonstrated that haptics is effective in communicating valence and arousal, and the emotions of happiness, sadness, anger and fear, and less focus have been given to the communication of disgust and surprise; 3) the haptic-based affect detection remains an understudied topic, whereas the haptic-based affect display is a well-established subject; and 4) the interpretation of the haptic stimulation by human beings is highly contextual.
关键词： social computing,haptic interfaces,human computer interaction,Affective computing,tactile sensors
更新于2025-09-19 17:13:59