NDLI: Comparison of eye and lip measurements obtained using single and stereo photogrammetry

Content Provider	IEEE Xplore Digital Library
Author	Douglas, T.S. Meintjes, E.M. Vaughan, C.L. Viljoen, D.
Copyright Year	2003
Description	Author affiliation: Dept. of Human Biol., Cape Town Univ., South Africa (Douglas, T.S.; Meintjes, E.M.; Vaughan, C.L.)
Abstract	Some of the facial distances used in Fetal Alcohol Syndrome (FAS) screening, namely palpebral fissure length, upper lip width and upper lip height, obtained using single and stereo photogrammetry, were examined. Photogrammetry as an alternative to direct measurements to obtain facial distances is less intrusive to subjects and reduces screening time, but measurements from single frontal photographs neglect depth information and may be inadequate for screening purposes. We therefore examined the role of depth in eye and lip measurements and found that depth contributed less than 1 mm to distance measurements in an idealized system where the real-world co-ordinates of points were known from three-dimensional calibration of stereo photographs. However, the differences found between measurements taken from single frontal photographs and those from stereo-photogrammetry indicated that measurements from single photographs are prone to errors.
Sponsorship	Whitaker Found
Starting Page	545
Ending Page	547
File Size	330522
Page Count	3
File Format	PDF
ISBN	0780377893
ISSN	1094687X
DOI	10.1109/IEMBS.2003.1279795
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-17
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Birth disorders Africa Calibration Facial features Humans Distance measurement Length measurement Biomedical imaging Time measurement Cities and towns
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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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
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