Light scattering modeling method for complex spatial object

Abstract

The invention relates to a light scattering modeling method for a complex spatial object, belonging to the technical field of modeling aerospace spatial objects. The method of the invention comprises the following steps: firstly, establishing a light scattering empirical model of a material according to the comprehensive light scattering intensity of the material; obtaining incident sections of the spatial object by parallel projection transformation, and judging and selecting an effective incident section; according to the light scattering empirical model of the material, counting the mean value of the reflectivity of pixels on the drawn effective incident section to obtain the mean reflectivity; calculating the area of the effective incident section according to the proportional relation between the total number of the pixels on the effective incident section and the area of a drawn window; and establishing a light scattering model of the complex spatial object. In the invention, on the basis of considering the incoherent scattering characteristic and coherent scattering characteristic of the material, according to the practical propagation characteristic of rays, complex calculation of a three-dimensional space is projected to a two-dimensional surface, the computer graphics theory is utilized for realizing quick determination of the effective incident section and the mean reflectivity of the section, and the problem of light scattering calculation of the complex spatial object is better solved.

Description

technical field [0001] The invention relates to a complex space object light scattering modeling method, belonging to the technical field of aerospace space object modeling. Background technique [0002] The analysis of optical characteristics of space targets is the premise of optical detection and identification of targets. The light scattering characteristics of space targets are an important part of optical properties and are receiving more and more attention. Many scholars have carried out a lot of research work in this area. In summary, their methods focus on the following two aspects: one is to regard the space target as a diffuse reflective Lambertian surface with several typical shapes. According to the radiation theory and Lambert's cosine law, Calculate its illuminance in space; the second is to use the accurate bidirectional reflectance distribution function (BRDF) of the actual measured material sample to calculate the light scattering characteristics of the tar...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a complex space object light scattering modeling method to solve the problem of the contradiction between the accuracy and computational complexity of the existing complex space object modeling method

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