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Tracking of non-rigid articulatory organs in X-ray image Sequences

Höwing, Frank; Dooley, Laurence S. and Wermser, Diederich (1999). Tracking of non-rigid articulatory organs in X-ray image Sequences. Computerised Medical Imaging and Graphics, 23(2) pp. 59–67.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/S0895-6111(98)00067-6
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Abstract

This article presents a system for the automated tracking of non-rigid anatomic structures in two-dimensional image sequences, which was primarily applied to X-ray image sequences of the vocal tract. In this particular application articulatory organs have to be measured to investigate the complex dynamic characteristics of human speech production. Of particular interest is a robust boundary detection of non-rigid organs such as lips and tongue. To solve this ill-posed detection problem under the presence of transparently superimposing structures, varying textural appearances of organs and noise, a two-level system is proposed. At the lower level, several edge-, region-, and motion-based image operators are combined to exploit their respective benefits and concomitantly compensate for their deficiencies. For the sake of precision, the result of these operators are not represented as larger tokens, such as line segments, but remain pixel-related cues or image evidences. At the higher level, an active contour-based component allows for the introduction of a priori knowledge about the object to be detected.

Item Type: Journal Article
ISSN: 0895-6111
Keywords: X-ray image sequences; Vocal tract; Boundary detection; Non-rigid objects; Active contours
Academic Unit/Department: Mathematics, Computing and Technology > Computing & Communications
Interdisciplinary Research Centre: Centre for Research in Computing (CRC)
Item ID: 11717
Depositing User: Laurence Dooley
Date Deposited: 19 Sep 2008 08:46
Last Modified: 02 Dec 2010 20:12
URI: http://oro.open.ac.uk/id/eprint/11717
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