Method for extracting tongue body from tongue images

An extraction method and image technology, applied in the field of image processing, to achieve high tongue segmentation accuracy, high practical value, and balance segmentation accuracy and efficiency requirements

Inactive Publication Date: 2006-07-19
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, this method is not directly applied to color tongue images, they are aimed at grayscale images. Obviously, ignoring color information will affect the correctness of the final tongue body segmentation, and this method does not address the situation where the segmentation effect is not ideal. Corresponding measures

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  • Method for extracting tongue body from tongue images
  • Method for extracting tongue body from tongue images
  • Method for extracting tongue body from tongue images

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Embodiment Construction

[0024] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] 1. Determine the characteristic area of ​​the tip of the tongue: the original RGB tongue image as figure 1 As shown in (a), it is transformed into a grayscale image, and the transformed grayscale image is as follows figure 1 As shown in (b), and perform threshold segmentation, the threshold segmentation results are as follows figure 1 As shown in (c), then search from the bottom of the image upwards to get the tongue tip feature point Q, and then get the upper endpoints QL and QR of the tongue tip feature area, as shown in figure 1 (c) shown.

[0026] 2. Determine the characteristic area of ​​the tongue root: grayscale projection the gray tongue image obtained in the above 1 to the vertical direction to obtain the valley point of the histogram; use the Sobel operator to obtain the edge of the tongue root, and search for the ...

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Abstract

The invention relates to a tongue body extracting method in the field of image processing technology. It comprises: ascertaining the tongue tip character area, ascertaining the tongue root character area, generating color gradient picture, constructing Snake initial curve, cutting initially, quoting the cutting effect: directly extracting the tongue body image when it cuts accurately, or enters into the next step; ascertaining some seed points around the tongue body, auto generating Pit line by the color gradient picture and doing second cutting: the corresponding Snake curve has been equally divided, the end point of each section is connected with the corresponding point of the Pit line, computing the spring force between the Pit points, adding the external force in the energy function, iterating the Snake curve until it contracts, at last extracting the tongue body image.

Description

technical field [0001] The present invention relates to a method in the technical field of image processing, in particular to a method for extracting a tongue from a tongue image. Background technique [0002] As an important content of inspection in traditional Chinese medicine, tongue diagnosis is an important way to obtain information about the patient's health status. For a long time, the tongue diagnosis method has mainly relied on the intuitive qualitative observation of doctors, which has disadvantages such as strong subjective dependence and poor repeatability. The objectification, quantification and standardization of TCM tongue diagnosis have important theoretical value and practical significance for the standardization of TCM syndrome differentiation and the further development of TCM tongue diagnosis. Using computer image analysis technology to process tongue images is an innovative way to develop TCM tongue diagnosis. In the TCM tongue diagnosis system that an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/34
Inventor 杨杰周越郁生阳王永刚张艳
Owner SHANGHAI JIAO TONG UNIV
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