Modeling method for human skin spectrum and mathematical modeling method for multiple skin parameters with high fitting degree

A modeling method and skin technology, applied in the field of computational biology, can solve problems such as difficult optimization, insufficient accuracy of results, and long calculation time

Active Publication Date: 2016-07-20
陈威
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This type of model is mainly used for skin rendering, emphasizing visual effects, and accuracy is not a key indicator. Therefore, there are problems in using it for quantitative analysis of skin parameters: ①There are few skin parameters, and there are only 4 component parameter variables, which cannot fully reflect the actual skin. Insufficient accuracy of results for quantitative analysis
②It only reflects the 400-600nm wavelength range of visible light, and the wavelength range above 600nm cannot be fitted
(Because the Kubelka-Munk model does not consider horizontal scattering, the result will be higher than the real result; the Multipole model cannot be simulated in some cases of too thin skin layer due to its assumed discrete point light source position, which often occurs at 590 -700nm wavelength range; the Monte-Carlo model results are uncertain, difficult to optimize, and the required calculation time is very long) ③ Only skin-related absorption-related skin composition parameters, scattering-related skin composition parameters

Method used

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  • Modeling method for human skin spectrum and mathematical modeling method for multiple skin parameters with high fitting degree
  • Modeling method for human skin spectrum and mathematical modeling method for multiple skin parameters with high fitting degree
  • Modeling method for human skin spectrum and mathematical modeling method for multiple skin parameters with high fitting degree

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Embodiment 1

[0057] Based on the needs of the application of the theoretical equation of radiation conduction, the present invention builds a four-layer structure (skin surface, epidermis, dermis, subcutaneous tissue) model of the skin under the action of visible light (400-700nm, the maximum depth of action on human skin is 4mm) , abstracted the analysis of the radiation conduction path of the four action forms of light (reflection, transmission, absorption, and scattering) on ​​the four-layer structure model of the skin. The optical analysis model between skin spectrum and reflection, absorption, scattering and transmission is formed comprehensively. The model has two characteristics: 1. In the structural model of the skin, the thickness of the epidermis and dermis of the skin are used as structural variables, highlighting the influence of these two variables on the spectrum; 2. The model covers the relationship between light and skin. The four action forms are a complete optical model. ...

Embodiment 2

[0101] On the basis of the above-mentioned skin spectral characteristic model, skin biological parameters related to light sensitivity are found, a skin parameter set corresponding to the skin structure model is formed, and the relationship between skin parameters, skin structure, and light action form is established. Furthermore, by modeling the three kinds of light action forms and skin parameters, a set of mathematical expressions is established, and the relationship between skin parameters and optical properties is built. In the present invention, as many relevant skin biological parameters are involved, The mathematical modeling method of making the model data sufficient and improving the accuracy of the algorithm, that is, multiple skin parameters with a high degree of fitting, is as follows:

[0102] Step one establishes an equation expressing the relationship between the reflectance in the rough surface layer of the skin and the roughness of the skin and the lightness o...

Embodiment 3

[0128] Preferably, in the mathematical modeling method of multiple skin parameters with high fitting degree of the present invention, step seven is also included: comparing the skin parameters calculated in steps 1 to 4 with the actual skin parameters of the sample to calculate the fitting degree, Judging whether the above-mentioned mathematical modeling method for multiple skin parameters is accurate can be used for quantitative analysis of skin parameters. The specific steps include 1. Measure the reflectance samples of each band of the target skin, and perform preprocessing to increase smoothness and reduce measurement noise; 2. Guess a set of initial skin biological parameters; 3. Calculate the skin surface according to the above steps , the reflectance and transmittance of the epidermis and the dermis; 4. according to the steps, calculate the reflectance of the three-layer structure of the skin epidermis, dermis and subcutaneous tissue; 5. calculate the reflectance of the ...

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Abstract

The invention discloses a modeling method for a human skin spectrum and a mathematical modeling method for multiple skin parameters with the high fitting degree. Two hierarchies of analysis models, namely, a skin spectrum analysis model and a mathematical skin parameter model, are established, so that the skin spectrum is related to light-sensitive biological skin parameters, a virtual spectrum is simulated by the aid of a group of skin parameters, then optimization iteration is performed with the information processing technology through the virtual spectrum and an actual spectrum, a group of optimal solutions can be found and reach the designated fitting degree standard, and biological quantitative analysis of skin is realized.

Description

technical field [0001] The present invention relates to computational biology, relates to a method for establishing an analysis model of skin spectrum and a modeling method for constructing skin biological parameters using the model, in particular to a modeling method for human skin spectrum and multiple skin parameters with high fitting degree mathematical modeling method. Background technique [0002] The interaction between light and matter will cause electronic transitions in the energy levels of atoms and molecules inside the matter, causing changes in wavelength and intensity information in the absorption, reflection, and scattering of light by the matter. Spectrometers can be used to detect and process such changes. Compared with other analytical methods, spectral detection has the characteristics of non-destructive, high sensitivity, and high precision, so it has been widely used in the detection and identification of various materials. [0003] Biological and optic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/11G06F17/50
CPCG06F17/11G06F30/20
Inventor 陈威
Owner 陈威
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