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Automatic tongue contour extraction method based on nuclear magnetic resonance images

A technology of nuclear magnetic resonance images and contours, applied in the field of image analysis, can solve the problems of increasing the difficulty of automatic extraction of tongue contours, and achieve the effect of saving time and manpower

Inactive Publication Date: 2012-10-24
TIANJIN UNIV
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Problems solved by technology

Compared with the heart and face, the tongue is more dynamic, which also increases the difficulty of automatic tongue contour extraction

Method used

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  • Automatic tongue contour extraction method based on nuclear magnetic resonance images
  • Automatic tongue contour extraction method based on nuclear magnetic resonance images
  • Automatic tongue contour extraction method based on nuclear magnetic resonance images

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Embodiment Construction

[0034] The specific implementation, structure, features and effects provided by the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0035] This specific example mainly describes the details of the automatic tongue contour extraction experiment from MRI images. The experiments include the steps of annotating a development set of images and an evaluation set. In addition, the pronunciation features obtained by AAM will also be proved in this part.

[0036] 1. Obtaining regions of interest in MRI images of vocal organs

[0037] As shown in the figure, an example of the MRI image of the vocal organs when a person is speaking, the MRI image in the figure includes not only the vocal organs but also other regions of the human head, such as the brain and spine. Since the brightness, position and other information of structures on each frame of MR images are changing, the more objects on the image, the mo...

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Abstract

The invention discloses an automatic tongue contour extraction method based on nuclear magnetic resonance images. The method is based on an active appearance model (AAM) algorithm, and a magnetic resonance image (MRI) of a vocal organ serves as a data extraction source. The method is characterized by comprising the steps of firstly performing image annotation and data set division of a development set and an evaluation set according to a MRI, and secondly constructing an AAM and performing automatic annotation of a tongue model according to the AAM. Compared with the prior art, the method has the advantages that the tongue contour extraction is achieved with small errors, the effect on survey errors in the later period is small and can be ignored, MRIs to be processed are large in quantity, and the method for extracting tongue contours through automatic annotation based on the AAM can save a large amount of time and human resources. The method has great significance to a series of speech studies.

Description

technical field [0001] The present invention relates to the technical field of image analysis based on nuclear magnetic resonance imaging technology, in particular to a technology for using computer technology to dynamically extract tongue contours from high-resolution images recorded by nuclear magnetic resonance imaging technology of tongue movement during speech generation. Background technique [0002] Speech is one of the most important ways for humans to communicate in daily life, and it is the most important characteristic that distinguishes them from other animals on earth. Compared with animals, humans have a set of very flexible pronunciation organs and interact with the brain, so that they can use speech and acoustic signals to express abstract concepts and achieve various communication purposes. Uncovering the mechanism of human speech production is of great significance for understanding human speech function and helping people with speech impairment. Human bei...

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Application Information

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IPC IPC(8): G06K9/62
Inventor 魏建国宋婵党建武王宇光黄典冯新元
Owner TIANJIN UNIV
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