872 research outputs found
HAPTIC VISUALIZATION USING VISUAL TEXTURE INFORMATION
Haptic enables users to interact and manipulate virtual objects. Although haptic
research has influenced many areas yet the inclusion of computer haptic into
computer vision, especially content based image retrieval (CBIR), is still few and
limited. The purpose of this research is to design and validate a haptic texture search
framework that will allow texture retrieval to be done not just visually but also
haptically. Hence, this research is addressing the gap between the computer haptic and
CBIR fields.
In this research, the focus is on cloth textures. The design of the proposed
framework involves haptic texture rendering algorithm and query algorithm. The
proposed framework integrates computer haptic and content based image retrieval
(CBIR) where haptic texture rendering is performed based on extracted cloth data. For
the query purposes, the data are characterized and the texture similarity is calculated.
Wavelet decomposition is utilized to extract data information from texture data. In
searching process, the data are retrieved based on data distribution.
The experiments to validate the framework have shown that haptic texture
rendering can be performed by employing techniques that involve either a simple
waveform or visual texture information. While rendering process was performed
instability forces were generated during the rendering process was due to the
limitation of the device. In the query process, accuracy is determined by the number
of feature vector elements, data extraction, and similarity measurement algorithm. A
user testing to validate the framework shows that users’ perception of haptic feedback
differs depending on the different type of rendering algorithm. A simple rendering
algorithm, i.e. sine wave, produces a more stable force feedback, yet lacks surface
details compared to the visual texture information approach
Haptic wearables as sensory replacement, sensory augmentation and trainer - a review
Sensory impairments decrease quality of life and can slow or hinder rehabilitation. Small, computationally powerful
electronics have enabled the recent development of wearable systems aimed to improve function for individuals
with sensory impairments. The purpose of this review is to synthesize current haptic wearable research for clinical
applications involving sensory impairments. We define haptic wearables as untethered, ungrounded body worn
devices that interact with skin directly or through clothing and can be used in natural environments outside a
laboratory. Results of this review are categorized by degree of sensory impairment. Total impairment, such as in an
amputee, blind, or deaf individual, involves haptics acting as sensory replacement; partial impairment, as is common
in rehabilitation, involves haptics as sensory augmentation; and no impairment involves haptics as trainer. This
review found that wearable haptic devices improved function for a variety of clinical applications including:
rehabilitation, prosthetics, vestibular loss, osteoarthritis, vision loss and hearing loss. Future haptic wearables
development should focus on clinical needs, intuitive and multimodal haptic displays, low energy demands, and
biomechanical compliance for long-term usage
Enhancing Fingertip Tactile Sensitivity by Vibrotactile Noise and Cooling Skin Temperature Effect
This paper discusses a method to enhance fingertip tactile sensitivity by applying a vibrotactile noise at the wrist. This is an application of stochastic resonance to the field of haptics. We consider that the tactile sensitivity of the fingertip improves when a sufficiently large noise is propagated to it from the wrist. However, fingertip tactile sensitivity decreases when a large noise that humans can perceive is applied to the wrist. Therefore, in this paper, we cool the wrist skin to reduce the wrist's tactile sensitivity to noise. This allows us to apply noise that is large, but still imperceptible, at the wrist and thus to propagate it to the fingertip. On the basis of these procedures, we propose a method to enhance fingertip tactile sensitivity. Further, we carry out several experiments and confirm that the proposed method improves fingertip tactile sensitivity
Sensory Communication
Contains table of contents for Section 2, an introduction and reports on fourteen research projects.National Institutes of Health Grant RO1 DC00117National Institutes of Health Grant RO1 DC02032National Institutes of Health/National Institute on Deafness and Other Communication Disorders Grant R01 DC00126National Institutes of Health Grant R01 DC00270National Institutes of Health Contract N01 DC52107U.S. Navy - Office of Naval Research/Naval Air Warfare Center Contract N61339-95-K-0014U.S. Navy - Office of Naval Research/Naval Air Warfare Center Contract N61339-96-K-0003U.S. Navy - Office of Naval Research Grant N00014-96-1-0379U.S. Air Force - Office of Scientific Research Grant F49620-95-1-0176U.S. Air Force - Office of Scientific Research Grant F49620-96-1-0202U.S. Navy - Office of Naval Research Subcontract 40167U.S. Navy - Office of Naval Research/Naval Air Warfare Center Contract N61339-96-K-0002National Institutes of Health Grant R01-NS33778U.S. Navy - Office of Naval Research Grant N00014-92-J-184
Generating haptic texture using solid noise
Texture enhances haptic interaction by providing unique, distinguishable, and versatile surfaces. In computer haptics, texture can render environments more realistic and provide useful information. In this paper, an algorithm is proposed for virtual texture simulation by using solid noise, where only a few parameters need to be altered to generate a range of realistic and diverse textures by reproducing different frequencies similar to that of real vibrational signals in a virtual environment. The proposed method can capture the textural effect in a haptic simulation while retaining a simple overall geometry and stable update rate. This method also allows the user to change the texture at runtime and can be easily incorporated into any existing code and used in any traditional haptic device without affecting overall haptic-rendering performance. Moreover, the solid noise texture is independent of object geometry and can be applied to any shape without additional computations. We conducted a human-subject study to evaluate the recognition accuracy for each generated haptic texture as well as its realism and correspondence to real texture. The results indicated the high performance of the method and its ability to generate haptic textures with a very high recognition rate that were highly realistic. 2021 The AuthorsThis paper was jointly supported by Qatar University M-QJRC-2020-7. The findings achieved herein are solely the responsibility of the authors. The Open Access funding is provided by the Qatar National Library .Scopu
Haptics: Science, Technology, Applications
This open access book constitutes the proceedings of the 12th International Conference on Human Haptic Sensing and Touch Enabled Computer Applications, EuroHaptics 2020, held in Leiden, The Netherlands, in September 2020. The 60 papers presented in this volume were carefully reviewed and selected from 111 submissions. The were organized in topical sections on haptic science, haptic technology, and haptic applications. This year's focus is on accessibility
Modeling and rendering for development of a virtual bone surgery system
A virtual bone surgery system is developed to provide the potential of a realistic, safe, and controllable environment for surgical education. It can be used for training in orthopedic surgery, as well as for planning and rehearsal of bone surgery procedures...Using the developed system, the user can perform virtual bone surgery by simultaneously seeing bone material removal through a graphic display device, feeling the force via a haptic deice, and hearing the sound of tool-bone interaction --Abstract, page iii
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