Calibration of high-speed imaging by laser triangulation

A method was developed for absolute calibration of endoscopic vocal fold images using laser triangulation. The laser is attached to a rigid endoscope with 8-degrees angle in relation to the optical axis of the endoscope. A special software is used for calibration and measurements from high-speed ima...

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Bibliographic Details
Published inLogopedics, phoniatrics, vocology Vol. 29; no. 4; p. 154
Main Authors Larsson, Hans, Hertegård, Stellan
Format Journal Article
LanguageEnglish
Published England 01.12.2004
Subjects
Calibration
Glottis - anatomy & histology
Glottis - physiology
Humans
Image Processing, Computer-Assisted - instrumentation
Laryngoscopes
Lasers
Software
Vibration
Video Recording - instrumentation
Vocal Cords - anatomy & histology
Vocal Cords - physiology
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Summary:A method was developed for absolute calibration of endoscopic vocal fold images using laser triangulation. The laser is attached to a rigid endoscope with 8-degrees angle in relation to the optical axis of the endoscope. A special software is used for calibration and measurements from high-speed images. The equipment can provide measurements both in horizontal and vertical planes, and can be used for calibrated measurements of vocal fold length, amplitude of vocal fold vibrations and vertical movements.
ISSN:1401-5439
DOI:10.1080/14015430410024353