Tongue image enhancement method

Abstract

The invention provides a tongue image enhancement method, and belongs to the technical field of medical image processing. The method comprises the steps of converting an RGB color space of an input tongue image F (x, y) into an HSI color space; performing global smoothing processing on the brightness component I of the HSI color space tongue image to obtain a tongue image smooth image G (x, y); performing edge detection on the G (x, y) to obtain a tongue image edge image B (x, y); carrying out nonlinear guided filtering on the tongue image by utilizing B (x, y) to obtain a filtered image Z (x,y); decomposing the brightness component I of the tongue image F (x, y) by using Z (x, y) to obtain a reflection component R (x, y); enhancing the image brightness through R (x, y) and normalizationto obtain an image L (x, y); and converting to an RGB color space by combining H and S components of an image F (x, y) HSI color space. According to the method, the problem that in tongue image detection, image details are not clear due to salt and pepper noise, camera tube and camera noise and the like, so that the accuracy of subsequent tongue body segmentation, feature extraction and other operations is affected is solved, the effect of the enhanced tongue image is improved, and the details are outstanding.

Description

technical field [0001] The invention relates to the technical field of image enhancement, in particular to an image enhancement method for performing image analysis on tongue images, and belongs to the technical field of medical image processing. Background technique [0002] Tongue diagnosis is one of the characteristics of TCM diagnosis. The tongue body is called the only exposed viscera. It can distinguish the pathological changes of the internal organs and the symptoms of human functions according to the biological characteristics of the tongue. By observing the color and texture features of the tongue image, it can be used to differentiate syndromes and diseases of the human body, better evaluate the health status of the human body, and provide a basis for disease diagnosis and analysis. The color and texture of the tongue can reflect the health of the heart and serve as the basis for the diagnosis of various cardiovascular diseases. However, traditional tongue diagnos...

AI Technical Summary

Problems solved by technology

The currently commonly used image enhancement methods do not specifically address the characteristics of tongue image images, the computer tongue diagnosis system and the application scenarios of tongue image analysis, thus adversely affecting the accuracy of tongue image segmentation and feature extraction in the subsequent tongue image diagnosis process.

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