Document Detail

Telescope aiming point tracking method for bioptic driving surveillance.
MedLine Citation:
PMID:  20529756     Owner:  NLM     Status:  MEDLINE    
A bioptic telescope is a visual aid used by people with impaired vision when driving in many U.S. states, though bioptic driving remains controversial. Objective data on how and when bioptic drivers use the telescope and what they look at with it are crucial to understanding the bioptic telescope's effects on driving. A video-based technique to track the telescope's aiming point is presented in this paper. With three infrared retro-reflective markers pasted on the bioptic spectacles frame, its movement is recorded using an infrared camera unit with infrared LED illuminators. The angles formed by the three markers are used to calculate the telescope's aiming points, which are registered with road scene images recorded by another camera. The calculation is based on a novel one-time calibration method, in which the light spot from a head-mounted laser pointer projected on a wall while the scanning is recorded by the scene camera, in synchronization with the infrared camera. Interpolation is performed within small local regions where no samples were taken. Thus, nonlinear interpolation error can be minimized, even for wide-range tracking. Experiments demonstrated that the average error over a 70(°)×48(°) field was only 0.86 (°) , with lateral head movement allowed.
Xianping Fu; Gang Luo; Eli Peli
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2010-06-07
Journal Detail:
Title:  IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society     Volume:  18     ISSN:  1558-0210     ISO Abbreviation:  IEEE Trans Neural Syst Rehabil Eng     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-08     Completed Date:  2011-04-01     Revised Date:  2014-09-21    
Medline Journal Info:
Nlm Unique ID:  101097023     Medline TA:  IEEE Trans Neural Syst Rehabil Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  628-36     Citation Subset:  IM    
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MeSH Terms
Audiovisual Aids*
Automobile Driving*
Equipment Design
Infrared Rays
Vision Disorders / rehabilitation
Grant Support
AG034553/AG/NIA NIH HHS; EY05957/EY/NEI NIH HHS; EY12890/EY/NEI NIH HHS; R01 EY005957/EY/NEI NIH HHS; R01 EY005957-21/EY/NEI NIH HHS; R01 EY012890/EY/NEI NIH HHS; R01 EY012890-08/EY/NEI NIH HHS; R01 EY012890-09/EY/NEI NIH HHS; R21 AG034553/AG/NIA NIH HHS; R21 AG034553-01/AG/NIA NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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