NDLI: Integration of the Senses of Vision and Touch in Perceiving Object Softness

Content Provider	IEEE Xplore Digital Library
Author	Widmer, A. Yaoping Hu
Copyright Year	2007
Description	Author affiliation: Univ. of Calgary, Calgary (Widmer, A.; Yaoping Hu)
Abstract	Based upon virtual reality (VR) technologies, a challenging issue for surgical planning is to permit surgeons intuitive and accurate interaction using their sense of vision and touch (e.g. to distinguish the softness of tissues). Since a viewing angle (VA) can influence apparent visual deformation of objects, we hypothesize that the VA would affect the perception of object softness. We conducted an experiment to test this hypothesis and to investigate the mechanisms of integrating the senses of vision and touch. Using a desktop VR setup, we tested 15 human participants for perceiving object softness under 3 conditions: (a) both visual and touch (haptic) information available; (b) only haptic information available; and (c) only visual information available. In each trial, participants had to select the harder object among two deformable balls of same softness but placed in different VAs. Our results showed that the VA affected the perception of object softness (within-subject ANOVA; F = 8.62, p < 0.001) -the larger the VA was the harder the ball was perceived. When two VAs differed at least 15deg, we found a significant difference in perceiving object softness (post-hoc Tukey test, p < 0.05). We applied the method of maximum likelihood estimate to compute the individual and combined weights of visual and haptic information during perceiving object softness. The computation revealed that the visual information was predominant when the VA was at -15deg, whereas the haptic information was prevailing when the VA was +15deg. We also discovered that the variance of both visual and haptic information lay between the individual variances of visual and haptic information, indicating the dependency between visual and haptic information. In conclusion, the VA should never be greater than 15deg to eliminate perceptual illusions. The visual and haptic information depends upon each other, disapproving the assumption of independency in early studies.
Starting Page	1353
Ending Page	1356
File Size	209987
Page Count	4
File Format	PDF
ISBN	1424410207
ISSN	08407789
DOI	10.1109/CCECE.2007.341
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-04-22
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Virtual reality Haptic interfaces Humans Surgery Three dimensional displays Testing Drives Technology planning Analysis of variance Maximum likelihood estimation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Hardware and Architecture

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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