The Synthesis of Three Dimensional Haptic Textures: Geometry, Control, and Psychophysics (Springer Series on Touch and Haptic Systems)

The Synthesis of Three Dimensional Haptic Textures: Geometry, Control, and Psychophysics (Springer Series on Touch and Haptic Systems)

Gianni Campion

Language: English

Pages: 160

ISBN: 0857295756

Format: PDF / Kindle (mobi) / ePub


The sense of touch is fundamental during the interaction between humans and their environment; in virtual reality, objects are created by computer simulations and they can be experienced through haptic devices. In this context haptic textures are fundamental for a realistic haptic perception of virtual objects.

This book formalizes the specific artefacts corrupting the rendering of virtual haptic textures and offers a set of simple conditions to guide haptic researchers towards artefact-free textures. The conditions identified are also extremely valuable when designing psychophysical experiments and when analyzing the significance of the data collected.

The Synthesis of Three Dimensional Haptic Textures, Geometry, Control, and Psychophysics examines the problem of rendering virtual haptic textures with force feedback devices. The author provides an introduction to the topic of haptic textures that covers the basics of the physiology of the skin, the psychophysics of roughness perception, and the engineering challenges behind haptic textures rendering. The book continues with the presentation of a novel mathematical framework that characterizes haptic devices, texturing algorithms and their ability to generate realistic haptic textures. Finally, two psychophysical experiments link the perception of roughness with the parameters of the haptic rendering algorithms.

This book formalizes the specific artefacts corrupting the rendering of virtual haptic textures and offers a set of simple conditions to guide haptic researchers towards artefact-free textures. The conditions identified are also extremely valuable when designing psychophysical experiments and when analyzing the significance of the data collected.

 

 

 

 

 

 

 

 

 

 

haptic mouse [74], and a P HANTOM™ [92]. Lederman conducted a set of experiments with linear gratings, produced by cutting parallel linear groves of different width on the surface. This process results in a 22 2 Literature Review series of raised ridges; these stimuli belong to the category of macro textures (with inter-element spacing >200 µm), and their estimated roughness was found to be significantly affected by a number of parameters, both when explored with a bare finger or through a

Darian-Smith, I.: Spatial and temporal factors determining afferent fiber responses to a grating moving sinusoidally over the monkey’s fingerpad. J. Neurosci. 9(4), 1280–1293 (1989) 48. Goodwin, A., Browning, A., Wheat, H.: Representation of curved surfaces in responses of mechanoreceptive afferent fibers innervating the monkey’s fingerpad. J. Neurosci. 15(1), 798–810 (1995) 49. Goodwin, A.W., Wheat, H.E.: Effects of nonuniform fiber sensitivity, innervation geometry, and noise on information

characteristic number and thus the passivity margin of the haptic interaction. The mapping of planar patches onto curved surfaces is a widely explored topic in the computer graphics domain [5], and the same techniques can be applied to generate the mapping function for haptic textures. For this reason, the texture map problem is not discussed in detail in this chapter. The extensions contained in this chapter have not been experimentally validated, but offer interesting insights on the problems

nevertheless far from being unique. Depending on the assumptions made, there are many different ways to convert a surface geometry into a force field. The same surface geometry can give rise to different fields according to the assumed geometry of a probe tip, as a first example. Besides geometry, many further assumptions must be made regarding the materials in contact, their compliance, the resulting tribology, the statics and dynamics of the probe, the presence of foreign particles, of

Tyrrell, R.A., Owens, D.A.: A rapid technique to assess the resting states of the eyes and other threshold phenomena: The modified binary search MOBS. Behav. Res. Meth. Instrum. Comput. 20(2), 137–41 (1988) 29. Weisenberger, J.M., Kreier, M.J., Rinker, M.A.: Judging the orientation of sinusoidal and square-wave virtual gratings presented via 2-DOF and 3-DOF haptic interfaces. Haptics-e 1(4) (2000), online Chapter 10 Conclusions Abstract The book is concluded by a chapter summarizing the major

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