“…Several protocols for evaluating data obtained with videostroboscopy have been developed (eg, Hirano and Bless." Dejonckere et al,3 and Poburka"), Recent advances in the technique of digital processing of laryngeal images have enabled the develop-ment of methods for deriving objective measurements from such endoscopic examinations (eg, Colton et aI,S Sercarz et al, 6 Johnson et aI, 7 Omori et al,8,9 Goncalves and Leonard, 10 Hanson et al, II Jeannon et al,12 and Bjorck and Hertegard!"). Quantitative measurements derived from videolaryngostroboscopic images of vocal fold vibration in normal speakers of both sexes were published by Woo,14 and his reference data can be used to identify dysphonic patients as opposed to normal subjects.…”