Tongue image segmentation method based on threshold technology and gray scale projection

Abstract

The invention provides a tongue image segmentation method based on the threshold technology and gray scale projection, and the method comprises the following steps: S1, transforming a hue component ofan obtained tongue image in an HSI color space, so that there is a difference in hue between the hue component of a tongue and an upper lip and its neighbor tissues after transformation; S2, employing the image threshold segmenting technology on the transformed hue component to obtain a binary segmentation result, and performing a morphological operation of the result to extract an initial tongueregion including the true tongue and the upper lip; S3, using the gray projection technique to find an image line corresponding to the boundary of a tongue root, removing the false tongue regions through the image line, such as the false region of the upper lip and the gap between the tongue root and the upper lip, correcting the tongue region, and taking the boundary of the tongue region as an initial tongue contour; S4, carrying out the smoothing processing of the tongue contour through using an active contour model to obtain a final segmentation result of the tongue image. The method remarkably improves the tongue image segmentation effect.

Description

technical field [0001] The invention belongs to the field of image processing, and in particular relates to a tongue image segmentation method based on threshold technology and grayscale projection. Background technique [0002] Tongue diagnosis is one of the main contents of "inspection" in traditional Chinese medicine, and it is one of the traditional diagnostic methods with Chinese characteristics. Tongue image is the most sensitive index to reflect the physiological function and pathological changes of the human body, and it has important application value in the process of diagnosis and treatment of traditional Chinese medicine. Applying image processing technology to establish an objective quantification and recognition method for tongue diagnosis information and realize the automation of TCM tongue diagnosis has important practical significance for the modernization of TCM. In the automatic tongue diagnosis system, after the patient's tongue image is acquired by a di...

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Problems solved by technology

[0006] In summary, the existing tongue image segmentation methods have cer

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