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Displaying 1-44 out of 44 total
An Experimental Study of Perceived Instability During Haptic Texture Rendering: Effects of Collision Detection Algorithm
Found in: Haptic Interfaces for Virtual Environment and Teleoperator Systems, International Symposium on
By Seungmoon Choi, Hong Z. Tan
Issue Date:March 2003
pp. 197
This paper presents a quantitative characterization of the instability that a human user often experiences while interacting with a virtual textured surface rendered with a force-reflecting haptic interface. Psychophysical experiments were conducted to mea...
 
Mechanical Impedance of the Hand Holding a Spherical Tool at Threshold and Suprathreshold Stimulation Levels
Found in: World Haptics Conference
By Ali Israr, Seungmoon Choi, Hong Z. Tan
Issue Date:March 2007
pp. 56-60
We report mechanical impedance of the hand for sinusoidal stimulation at the threshold and suprathreshold levels in the frequency range of 10-500 Hz delivered through a ball-shaped interface. The participants held the ball mounted on a minishaker in a way ...
 
A Frequency-Domain Analysis of Haptic Gratings
Found in: IEEE Transactions on Haptics
By Steven A. Cholewiak, Kwangtaek Kim, Hong Z. Tan, Bernard D. Adelstein
Issue Date:January 2010
pp. 3-14
The detectability and discriminability of virtual haptic gratings were analyzed in the frequency domain. Detection (Exp. 1) and discrimination (Exp. 2) thresholds for virtual haptic gratings were estimated using a force-feedback device that simulated sinus...
 
Toward Realistic Haptic Rendering of Surface Textures
Found in: IEEE Computer Graphics and Applications
By Seungmoon Choi, Hong Z. Tan
Issue Date:March 2004
pp. 40-47
<p>New sophisticated haptic-rendering algorithms let users experience virtual objects through touch. The authors systematically investigate the unrealistic behavior of virtual haptic textures.</p>
 
Template-based Recognition of Static Sitting Postures
Found in: Computer Vision and Pattern Recognition Workshop
By Manli Zhu, Aleix M. Martínez, Hong Z. Tan
Issue Date:June 2003
pp. 50
In this paper we introduce a generalization of Fisher-Rao's discriminant analysis and its application in a human-computer interaction scenario: a sensing chair. Our algorithm shows to be able to successfully estimate the underlying distributions of the pre...
 
An Analysis of Perceptual Instability During Haptic Texture Rendering
Found in: Haptic Interfaces for Virtual Environment and Teleoperator Systems, International Symposium on
By Seungmoon Choi, Hong Z. Tan
Issue Date:March 2002
pp. 129
This paper investigates the problem of perceived instability during haptic texture rendering. We focus on the perceptual analysis of the stability of textured surfaces rendered with a force-reflecting device. The method of limits is used to assess the dete...
 
An Eyetracker Study of the Haptic Cuing of Visual Attention
Found in: World Haptics Conference
By Chanon M. Jones, J. Jay Young, Rob Gray, Charles Spence, Hong Z. Tan
Issue Date:March 2007
pp. 557-558
We investigated the haptic cuing of visual attention using spatially-predictive (75% valid) and spatiallynonpredictive (25%) haptic cues. The participants performed a visual change detection task immediately following a haptic spatial cue whose location co...
 
Discrimination of Virtual Haptic Textures Rendered with Different Update Rates
Found in: World Haptics Conference
By Seungmoon Choi, Hong Z. Tan
Issue Date:March 2005
pp. 114-119
This paper addresses the discriminability of virtual haptic textures rendered with different update rates. Two psychophysical experiments were conducted. In the first experiment, we examined the pairwise discriminability of textured surfaces rendered with ...
 
Validity of Haptic Cues and Its Effect on Priming Visual Spatial Attention
Found in: Haptic Interfaces for Virtual Environment and Teleoperator Systems, International Symposium on
By J. Jay Young, Hong Z. Tan, Rob Gray
Issue Date:March 2003
pp. 166
This study investigated cross-modal links in attention between haptics and vision. A visual change-detection task was used as a measure of visual attention. Haptic taps on the back was used to prompt the user the visual quadrant within which changes occurr...
 
A Perceptual Study of Haptic Rendering of Surface Topography when Both Surface Height and Stiffness Vary
Found in: Haptic Interfaces for Virtual Environment and Teleoperator Systems, International Symposium on
By Laron Walker, Hong Z. Tan
Issue Date:March 2004
pp. 137-145
This study is concerned with the distorted perception of surface topography when both surface height and surface stiffness vary. Three psychophysical experiments were conducted using virtual surfaces rendered with a force-feedback device. In Exp. I, we fou...
 
Perceptual Issues in Haptic Digital Watermarking
Found in: IEEE Multimedia
By Domenico Prattichizzo, Mauro Barni, Gloria Menegaz, Alessandro Formaglio, Hong Z. Tan, Seungmoon Choi
Issue Date:July 2007
pp. 84-91
The growing interest in haptic applications suggests that haptic digital media will soon become widely available, and the need will arise to protect digital haptic data from misuse. In this article, we present our study and findings on psychophysical exper...
 
Manual Detection of Spatial and Temporal Torque Variation through a Rotary Switch
Found in: IEEE Transactions on Haptics
By Hong Z. Tan, Shuo Yang, Zygmunt Pizlo, Pietro Buttolo, Matthew Johnston
Issue Date:July 2008
pp. 96-107
We report three experiments on manual detection of torque variations experienced through a rotary switch. The experiments were designed to investigate whether torque perception was determined by the spatial or by the temporal characteristics of the rotary ...
 
Haptic stiffness identification by veterinarians and novices: A comparison
Found in: World Haptics Conference
By Neil Forrest, Sarah Baillie, Hong Z. Tan
Issue Date:March 2009
pp. 646-651
Palpation is important in both veterinary and medical health professions. It is however difficult to learn, teach and assess. More must be understood about the skills involved in palpation. The present study compares the ability of practicing veterinarians...
 
Haptic Edge Sharpness Perception with a Contact Location Display
Found in: IEEE Transactions on Haptics
By Jaeyoung Park,Andrew J. Doxon,William R. Provancher,David E. Johnson,Hong Z. Tan
Issue Date:September 2012
pp. 323-331
The effect of contact location information on virtual edge perception was investigated in two experiments. In Experiment 1, participants discriminated edge sharpness under force-alone and force-plus-contact-location conditions using a 4.8 mm radius contact...
 
Design and Evaluation of Identifiable Key-Click Signals for Mobile Devices
Found in: IEEE Transactions on Haptics
By Hsiang-Yu Chen,Jaeyoung Park,Steve Dai,Hong Z. Tan
Issue Date:October 2011
pp. 229-241
As touch based input becomes more popular in mobile devices, there is an increasing need for haptic feedback on key-less input surface. Four experiments were conducted to design and evaluate identifiable emulated key-click signals using a piezoelectric act...
 
What You Can't Feel Won't Hurt You: Evaluating Haptic Hardware Using a Haptic Contrast Sensitivity Function
Found in: IEEE Transactions on Haptics
By Curt M. Salisbury, R. Brent Gillespie, Hong Z. Tan, Federico Barbagli, J. Kenneth Salisbury
Issue Date:April 2011
pp. 134-146
In this paper, we extend the concept of the contrast sensitivity function—used to evaluate video projectors—to the evaluation of haptic devices. We propose using human observers to determine if vibrations rendered using a given haptic device are accompanie...
 
A Comparative Study of Haptic Stiffness Identification by Veterinarians and Students
Found in: IEEE Transactions on Haptics
By Neil Forrest, Sarah Baillie, Patrick Kalita, Hong Z. Tan
Issue Date:April 2011
pp. 78-87
Palpation is an important clinical skill in both veterinary and medical health professions. The present study compares the ability of practicing veterinarians and veterinary students to identify the stiffness of virtual surfaces through palpation. An absol...
 
Optimum Information Transfer Rates for Communication through Haptic and Other Sensory Modalities
Found in: IEEE Transactions on Haptics
By Hong Z. Tan, Charlotte M. Reed, Nathaniel I. Durlach
Issue Date:April 2010
pp. 98-108
This paper is concerned with investigating the factors that contribute to optimizing information transfer (IT) rate in humans. With an increasing interest in designing complex haptic signals for a wide variety of applications, there is a need for a better ...
 
To Go or Not to Go: Stimulus-Response Compatibility for Tactile and Auditory Pedestrian Collision Warnings
Found in: IEEE Transactions on Haptics
By Stacie M. Straughn, Rob Gray, Hong Z. Tan
Issue Date:April 2009
pp. 111-117
This study examined the effect of the stimulus-response (S-R) compatibility of pedestrian collision warnings presented via different sensory modalities in a driving simulator. Despite the well-established fact that reaction times (RT) are faster under S-R ...
 
Tactile Perception of Rotational Sliding
Found in: World Haptics Conference
By William R. Provancher, Brandt D. Erickson, Federico Barbagli, Hong Z. Tan
Issue Date:March 2007
pp. 127-132
We present a new tactile display for rendering rotational friction at the fingertips. To inform the design and control of this device, we have conducted an initial set of perceptual experiments to investigate perceptual thresholds for rates of rotational s...
 
Frequency Analysis of the Detectability of Virtual Haptic Gratings
Found in: World Haptics Conference
By Steven Cholewiak, Hong Z. Tan
Issue Date:March 2007
pp. 27-32
The tactile detectability of sinusoidal and squarewave virtual texture gratings were measured and analyzed. Using a three-interval one-up three-down adaptive tracking procedure, detection thresholds for virtual gratings were estimated using a customdesigne...
 
The Effect of Virtual Haptic Training on Real Surgical Drilling Proficiency
Found in: World Haptics Conference
By Christopher Sewell, Nikolas H. Blevins, Sumanth Peddamatham, Hong Z. Tan
Issue Date:March 2007
pp. 601-603
This sketch presents the design and preliminary results of a study that investigates the transference of motor skills learned in a haptic-enabled virtual environment to performance on a surgically-relevant task in the real world. The chosen task, which req...
 
Discriminability of Real and Virtual Surfaces with Triangular Gratings
Found in: World Haptics Conference
By Matthew Kocsis, Hong Z. Tan, Bernard D. Adelstein
Issue Date:March 2007
pp. 348-353
Human sensitivity to height differences in textured surfaces is on the order of microns. Research on human texture perception requires texture samples with precisely controlled micro-geometry. This can be achieved with an electrical discharge machining (ED...
 
Discrimination of Real and Virtual High-Definition Textured Surfaces
Found in: Haptic Interfaces for Virtual Environment and Teleoperator Systems, International Symposium on
By Hong Z. Tan, Bernard D. Adelstein, Ryan Traylor, Matthew Kocsis, E. Dan Hirleman
Issue Date:March 2006
pp. 1
Research on haptic texture perception requires the availability of textured surfaces with high precision and fine resolution. Given the exquisite sensitivity of the human fingers to minute differences in surface details, the textured surfaces need to be pr...
 
Tactual Frequency and Amplitude Discrimination with Fixed and Roving Background
Found in: Haptic Interfaces for Virtual Environment and Teleoperator Systems, International Symposium on
By Ali Israr, Hong Z. Tan, Charlotte M. Reed
Issue Date:March 2006
pp. 59
The authors present frequency and amplitude discrimination thresholds for motional and vibrational stimuli presented with and without the presence of roving background signals. Participants received on their left index fingertip sinusoidal displacement wav...
 
Tactile Change Detection
Found in: World Haptics Conference
By Alberto Gallace, Hong Z. Tan, Charles Spence
Issue Date:March 2005
pp. 12-16
Interest in the use of tactile information displays has grown rapidly in recent years. However, relatively little research has been conducted to explore any cognitive and/or attentional limitations that may be inherent when using the body as a receptor sur...
 
Perceptibility of Haptic Digital Watermarking of Virtual Textures
Found in: World Haptics Conference
By Domenico Prattichizzo, Mauro Barni, Hong Z. Tan, Seungmoon Choi
Issue Date:March 2005
pp. 50-55
Digital watermarking refers to the process of embedding a digital code into an image, video, printed document or audio media. The code should not interfere with the normal use of the media but can be recovered later. With the growing interest in haptic int...
 
Multi-Modal Perceptualization of Volumetric Data and Its Application to Molecular Docking
Found in: World Haptics Conference
By Ross Maciejewski, Seungmoon Choi, David S. Ebert, Hong Z. Tan
Issue Date:March 2005
pp. 511-514
In this paper, we present a multi-modal data perceptualization system used to analyze the benefits of augmenting a volume docking problem with other perceptual cues, particularly stereoscopic vision and haptic rendering. This work focuses on the problem of...
 
Effect of Cognitive Load on Tactor Location Identification in Zero-g
Found in: World Haptics Conference
By Anu Bhargava, Michael Scott, Ryan Traylor, Roy Chung, Kimberly Mrozek, Jonathan Wolter, Hong Z. Tan
Issue Date:March 2005
pp. 56-62
A wearable haptic interface has been developed to impart vibrotactile information to its user with the goal of improving situation awareness. The effectiveness of the haptic interface has been evaluated in three experiments aboard the NASA KC-135A reduced ...
 
Do Multimodal Signals Need to Come from the Same Place? Crossmodal Attentional Links Between Proximal and Distal Surfaces
Found in: Multimodal Interfaces, IEEE International Conference on
By Rob Gray, Hong Z. Tan, J. Jay Young
Issue Date:October 2002
pp. 437
Previous research has shown that the use of multimodal signals can lead to faster and more accurate responses compared to purely unimodal displays. However, in most cases response facilitation only occurs when the signals are presented in roughly the same ...
 
Development of a Wearable Haptic Display for Situation Awareness in Altered-gravity Environment: Some Initial Findings
Found in: Haptic Interfaces for Virtual Environment and Teleoperator Systems, International Symposium on
By Ryan Traylor, Hong Z. Tan
Issue Date:March 2002
pp. 159
Efforts are under way to develop a wearable haptic display that can impart directional information on a user's back for situation awareness. To date, two studies have been conducted aboard the NASA KC-135A reduced gravity aircraft to investigate the percep...
 
Tactual Displays for Wearable Computing
Found in: Wearable Computers, IEEE International Symposium
By Hong Z. Tan, Alex Pentland
Issue Date:October 1997
pp. 84
This paper provides a general overview of tactual displays (i.e., devices that communicate to a user through the sense of touch) and issues concerning the development of such displays for wearable computing. A wearable tactile directional display is presen...
 
Human Detection and Discrimination of Tactile Repeatability, Mechanical Backlash, and Temporal Delay in a Combined Tactile-Kinesthetic Haptic Display System
Found in: IEEE Transactions on Haptics
By Andrew J. Doxon,David E. Johnson,Hong Z. Tan,William R. Provancher
Issue Date:October 2013
pp. 453-463
Many of the devices used in haptics research are over-engineered for the task and are designed with capabilities that go far beyond human perception levels. Designing devices that more closely match the limits of human perception will make them smaller, le...
 
A Haptic Interface for Human-in-the-Loop Manipulation at the Nanoscale
Found in: World Haptics Conference
By Hong Z. Tan, Laron Walker, Ron Reifenberger, Sorubh Mahadoo, George Chiu, Arvind Raman, Aron Helser, Pablo Colilla
Issue Date:March 2005
pp. 271-276
This paper outlines major challenges that we are facing in interfacing a human user with objects in the nanoworld via a haptic interface. After a review of prior efforts at haptically-enabled nanomanipulation systems, we present the current state of our na...
 
Design Considerations for Stand-Alone Haptic Interfaces Communicating via UDP Protocol
Found in: World Haptics Conference
By Ryan M. Traylor, Danny Wilhelm, Bernard D. Adelstein, Hong Z. Tan
Issue Date:March 2005
pp. 563-564
This work was motivated by the need for high speed communication between a stand-alone haptic interface and a computer running haptic rendering algorithms. This paper describes our recent work on the use of User Datagram Protocol (UDP) over ethernet as a c...
   
Attentional gradient for crossmodal proximal-distal tactile cueing of visual spatial attention
Found in: ACM Transactions on Applied Perception (TAP)
By Hong Z. Tan, Rob Gray, Robert W. Proctor, Roslizawaty Mohd Rosli
Issue Date:November 2011
pp. 1-12
Past studies have established a crossmodal spatial attentional link among vision, audition, and touch. The present study examined the dependence of visual attention on the distance between a distal visual target (a changing element among static distractors...
     
The spatial resolution of crossmodal attention: Implications for the design of multimodal interfaces
Found in: ACM Transactions on Applied Perception (TAP)
By Hong Z. Tan, Rayka Mohebbi, Rob Gray
Issue Date:February 2009
pp. 1-14
Previous research on crossmodal attentional orienting has reported speeded reaction times (RT) when the stimuli from the different modalities are in the same spatial location and slowed RTs when the stimuli are presented in very different locations (e.g., ...
     
Discrimination and identification of finger joint-angle position using active motion
Found in: ACM Transactions on Applied Perception (TAP)
By Charlotte M. Reed, Hong Z. Tan, Mandayam A. Srinivasan, Nathaniel I. Durlach
Issue Date:July 2007
pp. 10-es
The authors report six experiments on the human ability to discriminate and identify finger joint-angle positions using active motion. The PIP (proximal interphalangeal) joint of the index finger was examined in Exps. 1--3 and the MCP (metacarpophalangeal)...
     
Haptic discrimination of force direction and the influence of visual information
Found in: ACM Transactions on Applied Perception (TAP)
By Charles Spence, Cristy Ho, Federico Barbagli, Hong Z. Tan, Ken Salisbury
Issue Date:April 2006
pp. 125-135
Despite a wealth of literature on discrimination thresholds for displacement, force magnitude, stiffness, and viscosity, there is currently a lack of data on our ability to discriminate force directions. Such data are needed in designing haptic rendering a...
     
Wearable vibrotactile displays
Found in: ACM SIGGRAPH 2005 Courses (SIGGRAPH '05)
By Hong Z. Tan
Issue Date:July 2005
pp. 49-es
We present a system, ArtNova, for 3D model design with a haptic interface. ArtNova offers the novel capability of interactively applying textures onto 3D surfaces directly by brush strokes, with the orientation of the texture determined by the stroke. Buil...
     
Toward realistic haptic rendering of surface textures
Found in: ACM SIGGRAPH 2005 Courses (SIGGRAPH '05)
By Hong Z. Tan, Seungmoon Choi
Issue Date:July 2005
pp. 125-es
The emerging science of haptic rendering consists of delivering properties of physical objects through the sense of touch. Owing to the recent development of sophisticated haptic-rendering algorithms, users can now experience virtual objects through touch ...
     
Tactual displays for sensory substitution and wearable computers
Found in: ACM SIGGRAPH 2005 Courses (SIGGRAPH '05)
By Alex Pentland, Hong Z. Tan
Issue Date:July 2005
pp. 105-es
A major challenge in building practical wearable computer systems is the development of output devices to display or transmit information to the human user. Much effort has been devoted to visual displays that are lightweight and have high resolution. Such...
     
Force constancy and its effect on haptic perception of virtual surfaces
Found in: ACM Transactions on Applied Perception (TAP)
By Hong Z. Tan, Laron Walker, Ron Reifenberger, Scott Crittenden, Seungmoon Choi
Issue Date:April 2005
pp. 89-105
The force-constancy hypothesis states that the user of a force-feedback device maintains a constant penetration force when stroking virtual surfaces in order to perceive their topography. The hypothesis was developed to address a real-world data perceptual...
     
Perceptual user interfaces: haptic interfaces
Found in: Communications of the ACM
By Hong Z. Tan
Issue Date:January 1988
pp. 40-41
The online Risks Forum has long been a hotbed for discussions of the relative merits of openness relating to the dissemination of knowledge about security vulnerabilities. The debate has now been rekindled, and is summarized here.
     
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