Towards a 3D articulatory model of velum based MRI and CT images


Serrurier, A. and Badin, P. (2005) Towards a 3D articulatory model of velum based MRI and CT images. ZAS Papers in Linguistics, 40, 195-211.

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Description/Abstract

This paper describes the processing of MRI and CT images needed for developing
a 3D linear articulatory model of velum. The 3D surface that defines each organ
constitutive of the vocal and nasal tracts is extracted from MRI and CT images
recorded on a subject uttering a corpus of artificially sustained French vowels and
consonants. First, the 2D contours of the organs have been manually extracted
from the corresponding images, expanded into 3D contours, and aligned in a
common 3D coordinate system. Then, for each organ, a generic mesh has been
chosen and fitted by elastic deformation to each of the 46 3D shapes of the
corpus. This has finally resulted in a set of organ surfaces sampled with the same
number of 3D vertices for each articulation, which is appropriate for Principal
Component Analysis or linear decomposition. The analysis of these data has
uncovered two main uncorrelated articulatory degrees of freedom for the velum’s
movement. The associated parameters are used to control the model. We have in
particular investigated the question of a possible correlation between jaw / tongue
and velum’s movement and have not find more correlation than the one found in
the corpus.

Item Type: Article
Additional Information:
Related URLs:
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
T Technology > TA Engineering (General). Civil engineering (General)
Q Science > QP Physiology
Divisions: University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Signal Processing and Control
ePrint ID: 49540
Date Deposited: 15 Nov 2007
Last Modified: 27 Mar 2014 18:33
URI: http://eprints.soton.ac.uk/id/eprint/49540

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