Computer-Assisted Measurement System for X-Ray Films of the Vocal Tract Measurements on sagittal X rays of the vocal tract may be made directly in terms of the variables of an articulatory model by superimposing a computer-generated vocal-tract outline onto the x-ray image. Previous methods require an operator to trace a pen or pointer coupled to a recording device along the ... Research Article
Research Article  |   June 01, 1973
Computer-Assisted Measurement System for X-Ray Films of the Vocal Tract
 
Author Affiliations & Notes
  • Paul Mermelstein
    Bell Laboratories, Murray Hill, New Jersey
  • D. J. Maclean
    Bell Laboratories, Murray Hill, New Jersey
Article Information
Research Articles
Research Article   |   June 01, 1973
Computer-Assisted Measurement System for X-Ray Films of the Vocal Tract
Journal of Speech, Language, and Hearing Research, June 1973, Vol. 16, 282-285. doi:10.1044/jshr.1602.282
History: Received November 21, 1972 , Accepted April 18, 1973
 
Journal of Speech, Language, and Hearing Research, June 1973, Vol. 16, 282-285. doi:10.1044/jshr.1602.282
History: Received November 21, 1972; Accepted April 18, 1973

Measurements on sagittal X rays of the vocal tract may be made directly in terms of the variables of an articulatory model by superimposing a computer-generated vocal-tract outline onto the x-ray image. Previous methods require an operator to trace a pen or pointer coupled to a recording device along the outlines or the projected image. The new system uses two video signals, one derived from a television camera scanning the projected x-ray image, the second from data in a computer display buffer. The computer display is modified through adjustment of control potentiometers assigned to the model variables. Convergence to a match between the two images is found to be a substantially quicker and easier task than manually tracing the image outline.

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