Fourth International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2005) Florence, Italy October 29-31, 2005

Fast FFT-Based Motion Compensation for Laryngeal High-Speed Videoendoscopy

Szymon Cieciwa (1), Dimitar D. Deliyski (2), Tomasz P. Zielinski (1)

(1) Department of Instrumentation and Measurement, AGH University of Science and Technology, Cracow, Poland
(2) Department of Communication Sciences and Disorders, University of South Carolina, Columbia, SC, USA

Six methods for endoscopic motion compensation for laryngeal high-speed videoendoscopy (HSV) are compared. Two of them are based on tracking the maximum of the cross-correlation function of two images; two are based on minimization of the L2–norm and L2-like distance between two images; and the other two make use of the peak present in the cross-power FFT-based spectrum of two images. All six methods are applied to compensate the motion, at the sub-pixel level, of the endoscopic lens relative to the vocal folds in HSV recordings. The new motion compensation methods based on FFT cross-power spectrum demonstrated remarkable computational speed and acceptable accuracy. While accuracy was best for the L2-minimization techniques, they were slower and had a limited motiontracking range.

Full Paper (reprinted with permission from Firenze University Press)

Bibliographic reference.  Cieciwa, Szymon / Deliyski, Dimitar D. / Zielinski, Tomasz P. (2005): "Fast FFT-based motion compensation for laryngeal high-speed videoendoscopy", In MAVEBA-2005, 129-132.