4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

Extraction of Tongue Contours in X-ray Images with Minimal User Interaction

Yves Laprie, Marie-Odile Berger

CRIN-CNRS & INRIA-Lorraine, Vandoeuvre-les-Nancy, France

In spite of the development of new imaging techniques, X-ray images still keep a prominent place to studying articulatory phenomena. Indeed, they are still unsurpassed to obtain an overall view of the moving vocal tract. However X-ray images require that articulators contours are extracted by hand which is a tedious task. This paper describes an approach towards the automatization of the tongue contour extraction. The "Snake"method introduced in computer vision to extract contours is unable alone to achieve the task. Therefore we make "Snakes" cooperate with an optical flow method applied where contours are not sufficiently isolated from spurious contours. Our experiments have shown that the tongue is tracked successfully when it is visible, and that interaction with the user remains necessary when the tongue is obscured.

Full Paper

Bibliographic reference.  Laprie, Yves / Berger, Marie-Odile (1996): "Extraction of tongue contours in x-ray images with minimal user interaction", In ICSLP-1996, 268-271.