brdf 中文意思是什麼

brdf 解釋
雙向反射分佈功能組
  1. The equation of the radiation transfer between two surfaces indicates that there are three factors that have influence on radiation transfer : brdf, projected solid angle ( psa ), and incident radiation flux. thereafter, a new baffle system design idea is put forward

    本文首先介紹了光學系統雜光的抑制措施，從光輻射在兩個表面傳遞的基本能量傳輸方程出發，指出影響輻射能量傳輸的三個因子：雙向反射分佈系數brdf 、投影立體角psa和入射輻射通量。
  2. Brdf of material surface has relations with wavelength, incidence angle and scattering angle. it can barely be expressed by analytical formula, and can only be obtained through experiments

    材料表面的brdf ，與波段、入射及出射角都有關系，幾乎不可能用解析表達式表示，只能通過實驗手段測試獲得。
  3. Sampling data for brdf is analyzed with spherical harmonics, and then the brdf surface could be rendered fast under environment illumination

    物體表面雙向反射分佈函數的采樣數據利用球面調和函數系進行分析，然後可以在環境光源下作快速繪制。
  4. We have built a special experimental set - up to measure brdf at the infrared wavelength and visible wavelength. the spatial brdf distributions of 2 optical surfaces and 5 absorption coat samples

    本文在長波紅外波段和可見波段，在實驗室建立了材料表面brdf的專門測試裝置，測得了可見和長波紅外波段兩個光學鏡面和5片「黑色」吸收塗層的brdf的空間分佈值。
  5. Pst denotes optical system capability of suppressing stray light, and brdf represents material surface scatter and reflectance property. these two physical values are the base of stray light analysis and calculation

    表示光學系統雜光抑制能力的點源透過率pst和材料表面散射特性的雙向反射分佈系數brdf ，這兩個物理概念是光學系統雜光分析與計算的基礎。
  6. Standard lamp and diffusers are very important calibration elements, in chapter three, first uv and vuv radiometric standard for calibration are introduced. then the fabrication and characteristics of baso4 diffuser and alminium diffuser are researched, the baso4 diffuser ' s hemispheric reflectance and bi - directional reflectance distribution function were measured and compared with lambtian surface, and the deviation from that of lambtian surface is given. in the experiment, al diffuser ' s brdf is researched, obtain the change of spectral characteristic of al diffuser, compare al diffuser ' s brdf before and after coated with al + mgf2, and different al diffusers with different surface roughness

    鋁漫反射板作為一個漫反射光學元件安裝在太陽紫外光譜監視器的入射狹縫前，太陽紫外光譜監視器在軌測量時，太陽輻射入射到鋁漫反射板后進入入射狹縫，光譜輻照度的角度是變化的，本章測量了鋁漫反射的相對雙向反射分佈函數，研究了鍍膜（ al + mgf _ 2 ）前後光譜反射率的變化，漫反射的光譜特性及漫反射板表面粗糙度對相對雙向反射分佈函數的影響，使得測量數據反演成為可能。
  7. In this paper, various previous brdf models, which include empirical models, geometrical optics models and theory models, are summarized and their merits and demerits are analysed. both shadowing function and facet distribution function as statistical characters of rough surface are discussed besides simpled fresnel reflectance function

    本文首先總結了前人提出的各種目標表面brdf模型? ?經驗模型、幾何光學模型、理論模型等，分析了這些模型的優缺點，論述了隨機粗糙表面幾何光學統計特性? ?遮蔽函數、小面元分佈函數，簡化了菲涅爾反射函數。
  8. Thus, it is quite necessary to deeply investigate some related problems, such as stray light transfer, stray light analysis and calculation, stray light suppression method, and baffle system design, bi - directional reflectance distribution function ( brdf ) of material surface, and accurate quantitative analysis and measurement of stray light performance of optical systems, like point source transmittance ( pst ) etc. this paper introduces stray light suppression method

    因此，對系統雜光的產生和傳輸、分析和計算、雜光抑制措施的採用與遮光系統的設計、材料表面brdf以及系統雜光pst的定量測試等方面進行深入研究，是非常有必要的。
  9. Using genetic algorithm, established brdf models of the silicon carbide paper and granite material and optimized parameters retrieval models

    採用遺傳演算法建立了金剛砂和大理石材料的雙向反射分佈函數的參數模型，對模型進行參數反演時，通過遺傳演算法進行優化。
  10. The empirical formula of brdf changes with different incident angles is fitted according to the experiment data. in chapter four, the solar ultraviolet spectrum monitor was calibrated

    第四章在對標準光源和漫反射板的研究基礎上，建立了定標裝置，對太陽紫外光譜監視器進行了地面輻射定標。
  11. Curve shape - is used to define the falloff of the brdf curve

    曲線弧度通常被用作定義brdf的效應消散范圍。
  12. For rendering of real - world surface material and 3d texture surface, the bi - directional reflection distribution function ( brdf ) and bi - directional texture function ( btf ) are described

    在復雜材質和3d紋理技術方面，本文主要闡述了對應的兩個描述函數，雙向反射分佈函數和雙向紋理函數的相應處理方法。
  13. By measuring the brdf of a kind of typical material - granite, sample ' s hemisphere reflectivity has been acquired and the law of its dependence on the zenith - angle and azimuth - angle variation has been studied

    摘要對以大理石為代表的材料進行了雙向反射分佈函數測量實驗，得出了樣品的半球反射率，並研究了其隨入射、反射天頂角等參數變化的規律。
  14. The main works and results are as follows : 1. by use of one order multiple scattering theory, light scattering and reflection by a single coating layer is analyzed. the variance of radiation intensity, bidirectional reflection distribution function ( brdf ) and laser radar scattering cross section with coating layer parameters is given, with the effect of rough contrast on bidirectional reflection distribution function

    本文主要研究了單層和多層塗層結構介質的光散射特性，以及近場條件下復雜目標對激光波束的散射，其主要工作如下： 1 、採用一階多重散射近似理論分析單層塗層對光波的散射和反射，計算並討論了輻射強度、雙向反射分佈函數和單位面積激光雷達散射截面隨塗層結構參數的變化規律，數值分析了粗糙基底對雙向反射分佈函數的影響。
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