Method for measuring directional reflectivity of mountainous region based on terrain sand table

A technology of terrain sand table and measurement method, which is applied in the direction of scattering characteristic measurement, measurement device, and material analysis through optical means, and can solve problems such as slow speed, inability to simulate BRDF in batches, and high complexity of computer simulation

Inactive Publication Date: 2017-12-22
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

However, the calculation process of the computer simulation model is complex and slow, and it is impossible to simulate BRDF in batches.
[0009] For complex terrain areas, the satellite BRDF data is used for verification. The traditional ground multi-angle measurement device is difficult to apply due to the difficulty of loading and unloading, and the complexity of computer simulation is higher than that of flat land, so it is not suitable for large-scale verification.

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  • Method for measuring directional reflectivity of mountainous region based on terrain sand table
  • Method for measuring directional reflectivity of mountainous region based on terrain sand table
  • Method for measuring directional reflectivity of mountainous region based on terrain sand table

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[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without cre...

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Abstract

The present invention relates to a method for measuring the directional reflectivity of a mountainous region based on a terrain sand table. The method comprises: S1, producing a high-precision terrain sand table model, and checking the fidelity; S2, carrying out multi-angle observation on the terrain sand table model; S3, carrying out BRF extraction on the terrain sand table model; and S4, analyzing and using the BRF data. According to the present invention, the method for measuring the directional reflectivity of the mountainous region based on the terrain sand table is provided, such that the multi-angle, near-simultaneous, and larger-scale measurement of the directional reflectivity of the earth surface can be achieved.

Description

technical field [0001] The invention relates to the field of authenticity testing of remote sensing, in particular to a method for measuring mountain directional reflectivity based on terrain sand table. Background technique [0002] The bidirectional reflectance distribution function (BRDF) is often used to describe the directional reflectance properties of non-Lambertian surfaces. In 1977, Nicodemus gave its definition: [0003] [0004] Among them, the unit is 1 / sr (steradian -1 ). E s (Ω s ) is represented on a differential area element dA, since Ω s The radiance L within this differential solid angle s (Ω s ) increase in irradiance on dA caused by the increase. L v (Ω v ) is due to the incremental dE s (Ω s ) caused by Ω v Increment of radiance in direction. The bidirectional reflection factor (BRF) refers to the ratio of the radiant flux reflected by the observed ground object to the ideal Lambertian body under the same conditions, and is equal to BRDF...

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Application Information

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IPC IPC(8): G01N21/47
CPCG01N21/4738G01N2021/1793
Inventor 闫凯阎广建穆西晗童依依李林源漆建波张吴明谢东辉
Owner BEIJING NORMAL UNIVERSITY
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