Self-adapting shaded-area detail reproduction method for tongue image with sufficient root-part illumination

An adaptive, image technology, applied in the field of medical image processing, which can solve the problems of loss of detailed information in the base of the tongue area and insufficient illumination in the area of ​​the base of the tongue.

Inactive Publication Date: 2012-06-20
BEIJING UNIV OF TECH
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Problems solved by technology

When acquiring tongue image information, due to insufficient light in t...

Method used

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  • Self-adapting shaded-area detail reproduction method for tongue image with sufficient root-part illumination
  • Self-adapting shaded-area detail reproduction method for tongue image with sufficient root-part illumination
  • Self-adapting shaded-area detail reproduction method for tongue image with sufficient root-part illumination

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Embodiment Construction

[0054] In this implementation method, in the traditional Chinese medicine tongue image acquisition system composed of a mechanical platform and a standard light source (D65 light source), under the condition that the position of the digital camera and the oral tongue body model are fixed, the camera is operated by software to obtain 8 different exposure times of the tongue. image, the exposure time is H=[2, 1, 0.5, 0.25, 0.125, 0.0667, 0.0333, 0.0167]; then transmit the image to the computer, estimate the camera’s response function u, read 8 tongue images for synthesis, and then complete Tone mapping enables adaptiveness of the root region of the tongue image. The specific implementation process is as follows:

[0055] 1. By changing the exposure time, obtain 8 tongue images with different exposure amounts, all of which are m×n in size, and the exposure time is as follows:

[0056] H=[2, 1, 0.5, 0.25, 0.125, 0.0667, 0.0333, 0.0167], input it into the computer;

[0057] 2. Fo...

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Abstract

The invention belongs to the field of medical image processing, and relates to a self-adapting shaded-area detail reproduction method for a tongue image with sufficient root-part illumination. The invention is provided aiming at tongue images with sufficient root-part illumination. According to the invention, under a condition of a same light source, positions of a shooting device and a shooting object are fixed; exposure times are changed, such that a set of tongue images with different exposures are obtained; the shooting device is subject to response curve estimating with a camera radiation calibration algorithm; according to an obtained three-channel response curve, tongue image sequences with different exposures are synthesized; irradiance values of all pixels of the synthesized tongue image are obtained; through tone mapping, the synthesized tongue image data is mapped to a common displaying device, such that the tongue image is displayed. During the mapping procedure, self-adaptation of the tongue image is achieved, and detail reproduction of tongue-roots with sufficient illumination is realized. With the method, mapping of the synthesized tongue image can be realized, such that details of tongue-roots with sufficient illumination can be reproduced. Therefore, light area and shaded area information of a real tongue can be better reproduced, and objectivity of traditional Chinese medicine tongue inspection can be promoted.

Description

technical field [0001] The invention belongs to the field of medical image processing. It is a method of synthesizing and reproducing images using computer technology, image capture technology, digital image processing technology, etc., and applying it to the field of tongue image in traditional Chinese medicine. When the human eye directly observes the tongue body, it can see areas with various brightness levels due to local adaptation. However, the tongue image on the display is at an adaptation level, so that the information contained in the under-illuminated tongue root area cannot be revealed. This method can synthesize and reproduce tongue images with different exposures, so that the detailed information of the under-illuminated tongue root area can be revealed, and the adaptiveness of the under-illuminated tongue image at the root can be realized. [0002] Using computer image analysis technology as the main technical means to study the objectivity of tongue diagnosis ...

Claims

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Application Information

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IPC IPC(8): G06T5/50G06T7/00
Inventor 蔡轶珩吕慧娟唐超卓力
Owner BEIJING UNIV OF TECH
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