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A Method of Constructing a Function Expressing the Spatial Distribution Characteristics of Light Scattering of Mineral Particles

A technology of spatial distribution and mineral particles, applied in the field of remote sensing geology, can solve problems affecting simulation accuracy

Inactive Publication Date: 2018-06-19
CHINA AERO GEOPHYSICAL SURVEY & REMOTE SENSING CENT FOR LAND & RESOURCES
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Problems solved by technology

In fact, some phase functions cannot meet this basic condition, and the numerical simulation directly used in rock and mineral spectra will affect the simulation accuracy

Method used

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  • A Method of Constructing a Function Expressing the Spatial Distribution Characteristics of Light Scattering of Mineral Particles
  • A Method of Constructing a Function Expressing the Spatial Distribution Characteristics of Light Scattering of Mineral Particles
  • A Method of Constructing a Function Expressing the Spatial Distribution Characteristics of Light Scattering of Mineral Particles

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Embodiment Construction

[0025] See figure 1 , in order to better illustrate the method for constructing a function expressing the spatial distribution characteristics of mineral particle light scattering in the present invention, a new phase function is constructed. Specific steps are as follows:

[0026] Step 1: Selection of phase function

[0027] The second-order Lerend polynomial is selected as the expression of the phase function, and its expression is,

[0028]

[0029] Among them, P is the scattering phase function, g is the phase angle, which is the angle between the incident light and the scattered light, and the range of variation is 0 to 2π, that is, 0-360 degrees. b and c are coefficients that control the spatial distribution characteristics of scattered light, b, The variation range of c is -1.0~1.0, 0~1.0 respectively. When both are 0, the scattering is isotropic, that is, the scattering phase function does not change with the phase angle and is constant at 1. When b is negative, ...

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Abstract

The invention discloses a construction method of a function expressing a mineral particle light scattering distribution feature. The method comprises the following four steps: I, selecting a phase function; II, deducing a phase function integral expression; III, analyzing the phase function integral expression; IV, constructing a new phase function. Compared with the conventional phase function, the construction method has the advantages that the constructed phase function satisfies a basic physical condition which needs to be satisfied by a scattering phase function, namely, the integral value is kept constant at 2pi when the scattering phase function is integrated in the range of 0-2pi. The construction method belongs to the field of remote sensing geology, is suitable for numerical simulation and emulation of rock and mineral reflection and emission spectrums, and contributes to increase of the numerical simulation accuracy of rock and mineral spectrums since the basic physical condition of particle light scattering is satisfied.

Description

technical field [0001] The invention relates to a construction method of a function expressing the spatial distribution characteristics of mineral particle light scattering. The constructed function is a function quantitatively expressing the spatial distribution characteristics of scattering energy, which belongs to the field of remote sensing geology, and is applicable to the numerical value of reflection and emission spectra of rocks and minerals Simulation and emulation. Background technique [0002] The function that quantitatively expresses the spatial distribution characteristics of the scattered energy after light is scattered by mineral particles is an important mathematical basis for the numerical simulation and simulation model of the reflection and emission spectra of rocks and minerals. At present, it is mainly expressed by mathematical polynomials, and Legendre polynomials are the most widely used. This expression, also known as the phase function, is a functi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/15G01N21/47
Inventor 闫柏琨赵哲杨苏明
Owner CHINA AERO GEOPHYSICAL SURVEY & REMOTE SENSING CENT FOR LAND & RESOURCES
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