@InProceedings{MartinsMasc:2011:SpReEn,
author = "Martins, Ana Lu{\'{\i}}sa Dine and Mascarenhas, Nelson Delfino
d'{\'A}vila",
affiliation = "{Universidade Federal de S{\~a}o Carlos} and {Universidade
Federal de S{\~a}o Carlos}",
title = "Spatio-temporal resolution enhancement of vocal tract MRI
sequences based on the Wiener filter",
booktitle = "Proceedings...",
year = "2011",
editor = "Lewiner, Thomas and Torres, Ricardo",
organization = "Conference on Graphics, Patterns and Images, 24. (SIBGRAPI)",
publisher = "IEEE Computer Society",
address = "Los Alamitos",
keywords = "magnetic resonance imaging (MRI), human speech production
research, spatio-temporal resolution enhancement, super-resolution
image reconstruction.",
abstract = "Research on human speech production is highly dependent upon
information about the position and movements of the speech
articulators. Dynamic magnetic resonance imaging (MRI) has been
the main tool to support this process. With this technique, image
sequences can be acquired in the act of speech, which allows
identifying shapes of the vocal tract in real time. However, the
spatial and temporal resolution requirements are not known a
priori and are expected to vary according to the speech task.
Several available approaches enhance resolution by either changing
the acquisition process of current devices, or by trading the
acquisition devices themselves by more powerful ones. Both
solutions involve additional hardware costs. In this paper, we
propose an evolution of an approach to enhance spatio-temporal
resolution of MRI image sequences of the vocal tract using only
digital image processing techniques. On one hand, temporal
resolution is increased by generating intermediate images
according to the movement present in an observed sequence. On the
other hand, spatial resolution is increased by applying a novel
approach to super-resolution image reconstruction based on the
Wiener filter. To evaluate the proposed approach, we processed a
set of five simulated low resolution images in a sequence.
Compared to available methods, results provide evidence of the
effectiveness of the proposed method.",
conference-location = "Macei{\'o}, AL, Brazil",
conference-year = "28-31 Aug. 2011",
doi = "10.1109/SIBGRAPI.2011.33",
url = "http://dx.doi.org/10.1109/SIBGRAPI.2011.33",
language = "en",
ibi = "8JMKD3MGPBW34M/3A3M362",
url = "http://urlib.net/ibi/8JMKD3MGPBW34M/3A3M362",
targetfile = "Sibgrapi2011.pdf",
urlaccessdate = "2024, Apr. 29"
}