CN113057583A - Tongue picture color correction method - Google Patents
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- CN113057583A CN113057583A CN202110257022.6A CN202110257022A CN113057583A CN 113057583 A CN113057583 A CN 113057583A CN 202110257022 A CN202110257022 A CN 202110257022A CN 113057583 A CN113057583 A CN 113057583A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
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Abstract
The invention provides a tongue image color correction method, and relates to the field of color recognition. The invention aims to solve the problems that the acquired tongue picture color is influenced by illumination factors and the accuracy of the color value of the used tongue picture color correction color card is different, so that the accuracy of the acquired tongue picture color is poor. Step S1, placing 2 square hard bottom plates pasted with color cards on two sides of the tongue of the subject respectively and keeping the color cards parallel to the tongue and in the same plane; step S2, simultaneously shooting images of the tongue and the two groups of color cards; step S3, analyzing the tongue picture and the color values of the two groups of color cards from the image; and step S4, obtaining the color of the tongue picture according to the color values of the tongue picture and the two groups of color cards.
Description
Technical Field
The invention relates to tongue color identification. Belonging to the field of color recognition.
Background
The tongue diagnosis is an important component of diagnosis and treatment in traditional Chinese medicine, and mainly refers to the tongue proper, tongue coating and tongue movement, and combines with relevant knowledge to determine the nature of the disease, the abundance or insufficiency of qi and blood, and the excess or insufficiency of body fluid. Because the tongue manifestation of traditional Chinese medicine is influenced by objective factors, the objective, quantitative and standardized research on tongue manifestation by means of modern information technology has become one of the research hotspots in the development of traditional Chinese medicine.
Modern tongue diagnosis relies on image acquisition technology to acquire tongue pictures, but color value errors exist between the colors of tongue picture images and real colors due to environmental parameters such as shooting illumination conditions and equipment in the tongue picture acquisition process, and accuracy of subsequent computer correction results is affected. Therefore, in order to avoid errors, some color correction methods are proposed, mainly including "initial detection of light source selection in objective tongue image information research published in the university of Shanghai medicine in 2004," tongue image color correction algorithm based on CS-BP neural network "published in 2019 in the university of Guizhou (Nature science edition) by Shiqiang et al," research and design of tongue image data mining system based on mobile terminal in Chinese medicine based on Mobile terminal "published in 2015 by Shenzhong Cai, and" A novel imaging system for measuring instruction Technology Conference, Anchorage "published in 2002 by Yang Cai; wherein, the stone strength and the like simulate natural light to observe the traditional tongue picture by taking a standard light source D50 as a lighting source, and obtain the tongue picture consistency rate of more than 90 percent under two conditions of a D50 light source and the natural light; zhao Xiaomei et al put the standard 24-color card on the bridge of the nose of the examinee, and then carry out color correction based on the tongue diagnosis image of the CS-BP neural network; selecting a non-reference color plate to assist in correcting chromatic aberration when analyzing characteristics of tongue image feature expressions under different color space models, and providing a white plate as a color correction method of a color scale mode; yang Cai adopts a Munsell color card to be placed under the tongue body to shoot together.
However, the chromatic aberration correction realized by simulating various environmental lighting conditions by means of the light source and the color management of the photographing equipment has high requirements on the environment except the light source conditions, is complex to operate and has no universal adaptability. The color plate without reference or the standard 24-color card with the white plate as the color code mode is not much similar to the tongue coating color, the color which can be contrasted with the content color of the tongue picture is single, the accuracy of the corrected illumination environment condition is not high, and a large error exists; and the price of the Munsell color card is too expensive, so that the Munsell color card is difficult to popularize and use in common experiments.
The above different research methods show different tongue picture correction results. Because there is no standardized and normalized tongue picture standard color card correction method at present, and the color accuracy of the color card is different, the correction data of the tongue picture can not be unified, and the popularization and the use are difficult.
Based on the above reasons, it can be known that there is a color value error between the color of the photographed tongue picture image and the real color possibly caused by the environmental factors such as the illumination condition, and in addition, the accuracy of the existing color card is not enough, so that the popularization and the use are difficult.
Disclosure of Invention
The invention aims to solve the problems that the acquired tongue picture color is influenced by illumination factors and the accuracy of the color value of the used tongue picture color correction color card is different, so that the accuracy of the acquired tongue picture color is poor. A tongue picture image color correction method is now provided.
The color correction method of the tongue picture is realized based on a tongue picture color correction color card, the color card comprises 2 square hard bottom plates and two groups of color cards,
each group of color cards comprises a plurality of color cards, the color values of the two groups of color cards are different,
a group of color cards are respectively stuck on the 2 square hard bottom plates, the 2 square hard bottom plates are parallel to the tongue of a subject and are positioned in the same plane, the 2 square hard bottom plates and the two groups of color cards are arranged in axial symmetry,
a plurality of color cards in each group of color cards are transversely and sequentially arranged on each square hard bottom plate to form a plurality of rows of color cards,
and an empty color card area is reserved at the bottom of each two groups of color cards and at the opposite edges of the two groups of color cards.
The identification method comprises the following steps:
step S1, holding the empty color card area on the 2 square hard bottom plates by hand, respectively placing the 2 square hard bottom plates adhered with the two groups of color cards on two sides of the tongue of the subject and keeping the color cards parallel to the tongue;
step S2, simultaneously shooting images of the tongue and the two groups of color cards;
step S3, analyzing the tongue picture and the color values of the two groups of color cards from the image;
and step S4, obtaining the color of the tongue picture according to the color values of the tongue picture and the two groups of color cards.
Preferably, in step S1, the specific process of pasting the two sets of color cards is as follows:
24 color cards are respectively adhered to each square hard bottom plate, and the 24 color cards are transversely and sequentially arranged on each square hard bottom plate to form a plurality of rows of color cards.
Preferably, in step S2, the images of the tongue and the two sets of color charts are captured simultaneously using the mobile phone.
Preferably, the specific process of analyzing the tongue image and the color values of the two color charts from the images of the tongue and the two color charts is as follows:
and processing the images of the tongue and the two groups of color cards by adopting an image processing algorithm to obtain the color values of the tongue picture and the two groups of color cards.
Preferably, in step S3, the image processing algorithm is image processing software.
Preferably, the image processing software is Adobe Photoshop CS 6.
Preferably, in step S4, the specific process of obtaining the tongue color is as follows:
and correcting the color value of the tongue picture by using the color card color value close to the tongue picture to obtain the corrected color value of the tongue picture, thereby identifying the real color of the tongue picture.
Preferably, in step S3, the color values include RGB values and Lab values.
Preferably, the 48 color chips are all the same size.
The invention has the beneficial effects that:
the two prepared tongue picture color correction color cards are respectively placed at two sides of the tongue of a subject, the color cards are kept parallel to the tongue, and photographing is carried out without shielding, shaking and blurring; shooting the images of the tongue and the two groups of color cards into one image; because the tongue and the color card are arranged in parallel, the received light source has the same angle and intensity, the influence of the light source on the tongue picture color is not considered, and the tongue picture color can be directly corrected according to the color value of the color card in the image, so that the obtained tongue picture color is more accurate, simpler and more direct.
In addition, the application has two groups of color cards, each group of color cards comprises a plurality of color cards, the color values in the two groups of color cards are different, the number of the color cards is large, the accuracy is high, the accuracy of tongue picture color identification is improved, the change of the tongue picture can be reflected more accurately, the authenticity and the reliability are realized, and the correction method is suitable for correcting different tongue picture colors.
The method and the device can avoid the interference of illumination conditions, reduce color value errors between the tongue picture and the real tongue picture caused by shooting tongue picture images under different illumination conditions, and improve the accuracy of shooting the images by the mobile phone. Breaks through the limitation of single illumination condition and provides more accurate and convenient health self-checking way for common people.
Drawings
FIG. 1 is a left side color chip;
FIG. 2 is a right side color chip;
FIG. 3 is a flowchart illustrating a method for correcting color of a tongue image according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of real-time embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention is further described with reference to the following figures and specific examples.
Example 1:
the identification method of the tongue picture image color correction provided by the invention is realized based on a tongue picture color correction color card, as shown in figure 1 and figure 2, the color card comprises 2 square hard bottom plates 1 and two groups of color cards 2,
each group of color cards comprises a plurality of color cards, the color values of the two groups of color cards are different,
a group of color cards 2 are respectively stuck on 2 square hard bottom plates 1, the 2 square hard bottom plates 1 are parallel and positioned in the same plane, the 2 square hard bottom plates 1 and the two groups of color cards 2 are arranged in axial symmetry,
the color cards in each group of color cards 2 are transversely arranged on each square hard bottom plate in turn to form a plurality of rows of color cards,
and an empty color card area is reserved at the bottom of the two groups of color cards 2 and at the opposite edges of the two groups of color cards 2.
It is characterized in that the preparation method is characterized in that,
as shown in fig. 3, the identification method includes the following steps:
step S1, holding the empty color card area on the 2 square hard bottom plates 1 by hand, respectively placing the 2 square hard bottom plates 1 adhered with the two groups of color cards 2 at two sides of the tongue of the subject and keeping the color cards 2 parallel to the tongue;
step S2, simultaneously shooting the images of the tongue and the two groups of color cards 2;
step S3, analyzing the tongue picture and the color values of the two groups of color cards from the image;
and step S4, obtaining the color of the tongue picture according to the color values of the tongue picture and the two groups of color cards.
Specifically, when the tongue image of a subject is shot, two groups of color cards are placed at two sides of the tongue of the subject, the color cards are kept parallel to the tongue, the photographing is carried out without shielding, shaking or blurring, and the color cards and the tongue image need to appear in the same shooting interface to be used as comparison; therefore, the tongue and the 2 square hard bottom plates 1 are positioned on the same plane and are subjected to the same illumination condition, the comparison is directly carried out after the same image of the color card and the tongue image is collected, the comparison result is more accurate, and the situation that the tongue and the color card receive different illumination influences to cause the comparison result to be inaccurate is avoided. In addition, the color cards are divided into two groups, the number is large, the color value range is more comprehensive, and the result of correcting the tongue picture color is more accurate.
In a preferred embodiment of the present invention, in step S1, the specific process of pasting the two color cards 2 is as follows:
24 color cards are respectively adhered to each square hard bottom plate 1, and the 24 color cards are transversely arranged on each square hard bottom plate 1 in sequence to form a plurality of rows of color cards.
Specifically, 24 color cards are adhered to each square hard base plate 1, 4 color cards are shown in fig. 1 and 2, and the 24 color cards on 2 square hard base plates are arranged in axial symmetry.
The application has the advantages that the number of the color cards is large due to the fact that the number of the color cards is 48, the accuracy of the color card value is high, different tongue color can be accurately corrected, the obtained tongue color is accurate, and the method has authenticity and reliability.
In a preferred embodiment of the present invention, in step S2, the images of the tongue and the two color charts 2 are captured simultaneously by using a mobile phone.
Specifically, a tongue diagnostic device or other imaging device may be used to capture images of the tongue and color chart.
Specifically, 2 square hard base plates 1 are set to be gray to avoid interfering with the color of the color chart.
Because 2 square hard bottom plates 1 are used for being placed on two sides of the tongue, the size of 2 square hard bottom plates 1 cannot be too large, and the size cannot be completely drawn into a picture, so the size of 2 square hard bottom plates 1 in the application can be 7.5cm × 5.5cm, the size of two groups of color cards 2 can be 6cm × 4cm, and the width of a blank color card area can be 1.5 cm. The function of reserving a hollow color card area is to separate the tongue from the color card, so that which area is the image of the tongue and which area is the image of the color card can be clearly distinguished from the pictures of the tongue and the color card, and therefore, the function of reserving a hollow color card area is to distinguish the images of the tongue and the color card.
In a preferred embodiment of the present invention, in step S3, the specific process of analyzing the tongue image and the color values of the two color charts from the images of the tongue and the two color charts 2 is as follows:
and processing the images of the tongue and the two groups of color cards 2 by adopting an image processing algorithm to obtain the color values of the tongue image and the two groups of color cards.
Specifically, after the image is processed, the image will show the tongue image and the color values of the two sets of color cards. The color cards are large in number and high in precision, so that the color value of the tongue picture can be completely corrected by using the color value close to the color cards to obtain the real color of the tongue picture, and the tongue diagnosis result is more accurate.
In a preferred embodiment of the present invention, in step S3, the image processing algorithm is image processing software.
In a preferred embodiment of the present invention, the image processing software is Adobe Photoshop CS 6.
Specifically, if images of tongue and color cards were taken with a cell phone, images taken with the cell phone were derived, and color values (Lab values) of each color card in the taken images were derived using Adobe Photoshop CS6 software and recorded.
In a preferred embodiment of the present invention, in step S4, the specific process of obtaining the tongue color is as follows:
and correcting the color value of the tongue picture by using the color card color value close to the tongue picture to obtain the corrected color value of the tongue picture, thereby identifying the real color of the tongue picture.
Specifically, due to the fact that the number of the color cards is large, the color value accuracy is high, and different tongue object colors can be effectively corrected. The method is adopted to identify the tongue picture color, and the obtained tongue picture color is real and reliable.
In a preferred embodiment of the present invention, in step S3, the color values include RGB values and Lab values.
Specifically, the color code number of each color card, its RGB value and Lab value are detailed in Table 1
TABLE 1
Lab generally refers to three indicators in color difference, L represents white and black, a represents red and green, b represents blue and yellow, and a positive value indicates a shift to the former color, and if a negative value indicates a shift to the latter color. And the RGB values are the names of three colors: r is red, G is green, and B is blue.
In addition, the color card has a plurality of types, the color card used in the application is a U-type color card, and after the type of the color card is known, the color number color and the color card of the corresponding type can be inquired by comparing the type.
Specifically, the design of 48 color card values is realized according to international standards, which is a common color card realization standard in the field, and based on the research of the existing documents on various tongue picture lab ranges as reference, the standard color values meeting the uniform experimental design method for tongue picture shooting are selected, so that the change of different tongue pictures can be reflected more accurately, and the method has authenticity and reliability. The method is beneficial to reducing color value errors between the tongue picture image shot by the mobile phone and the real tongue picture caused by different lighting conditions, and improving the accuracy of the digital image shot by the mobile phone. The limitation of single illumination condition is broken through, the universal adaptability of shooting equipment to different illumination conditions when the APP program objectively identified by the mobile phone tongue diagnosis collects tongue picture image data is expanded, the collected images have good sharability and universality, and the popularization of family medical health service is facilitated.
In a preferred embodiment of the present invention, the 48 color chips are all the same size.
Specifically, the 48 color cards are the same in size and shape, so that the color values displayed by the 48 color cards are the same in definition, and the tongue picture correction result is more accurate.
Claims (9)
1. The color correction method of the tongue picture image is realized based on a tongue picture color correction color card, the color card comprises 2 square hard bottom plates (1) and two groups of color cards (2),
each group of color cards (2) comprises a plurality of color cards, the color values of the two groups of color cards (2) are different,
a group of color cards (2) are respectively stuck on the 2 square hard bottom plates (1), and a hollow color card area is reserved at the bottom and one side of each square hard bottom plate (1);
it is characterized in that the preparation method is characterized in that,
the identification method comprises the following steps:
step S1, holding the empty color card area on the 2 square hard bottom plates (1) by hand, respectively placing the 2 square hard bottom plates (1) adhered with the two groups of color cards (2) at two sides of the tongue of the subject and keeping the color cards (2) parallel to the tongue;
step S2, simultaneously shooting the images of the tongue and the two groups of color cards (2);
step S3, analyzing the tongue picture and the color values of the two groups of color cards from the image;
and step S4, obtaining the color of the tongue picture according to the color values of the tongue picture and the two groups of color cards.
2. The method for color correction of tongue image according to claim 1, wherein the step S1 is performed by pasting two color charts (2) in the following steps:
24 color cards are respectively stuck to each square hard bottom plate (1), and the 24 color cards are transversely arranged on each square hard bottom plate (1) in sequence to form a plurality of rows of color cards.
3. The color correction method for tongue image according to claim 1, wherein in step S2, the images of the tongue and the two sets of color charts (2) are taken simultaneously by using a mobile phone.
4. The method for correcting color of tongue image according to claim 1, wherein the specific process of analyzing the color values of the tongue image and the two sets of color charts (2) from the images of the tongue image and the two sets of color charts in step S3 is as follows:
and processing the images of the tongue and the two groups of color cards (2) by adopting an image processing algorithm to obtain the color values of the tongue image and the two groups of color cards.
5. The tongue image color correction method according to claim 3, wherein the image processing algorithm is image processing software in step S3.
6. The tongue image color correction method according to claim 4, wherein the image processing software is Adobe Photoshop CS 6.
7. The method for correcting color of tongue image according to claim 1, wherein the step S4 comprises the following steps:
and correcting the color value of the tongue picture by using the color card color value close to the tongue picture to obtain the corrected color value of the tongue picture, thereby identifying the real color of the tongue picture.
8. The color correction method for tongue image according to claim 1, wherein in step S3, the color values include RGB values and Lab values.
9. The color correction method for tongue image according to claim 2, wherein the 48 color charts are all the same size.
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Cited By (1)
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| CN114092574A (en) * | 2021-11-19 | 2022-02-25 | 上海中医药大学 | Color correction method for tongue surface image in traditional Chinese medicine |
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