CAJ | 학술논문

针对当前蝴蝶彩色效果绘制方法的真实感问题，提出一种应用薄膜干涉模型的真实感绘制方法。首先根据蝴蝶表面脊突结构构造多层薄膜模型；然后利用多层薄膜干涉原理模拟光在薄膜内部的多次反射、透射形成的混合散射特性，其中，菲涅尔公式被引入以解释反射或透射波的幅值变化，微表面散射因子被创造性地引入来模拟蝴蝶粗糙表面的各向异性特性；最后通过全波长光谱建模增强干涉效果，在此基础上还将该算法与光线追踪渲染框架相结合，构建了可应用于光线追踪器的波动双向散射分布函数干涉模型，以精确地模拟光的幅值和相位变动。实验结果表明，该模型能够有效地绘制出较为逼真的蝴蝶彩色效果。
침대당전호접채색효과회제방법적진실감문제，제출일충응용박막간섭모형적진실감회제방법。수선근거호접표면척돌결구구조다층박막모형；연후이용다층박막간섭원리모의광재박막내부적다차반사、투사형성적혼합산사특성，기중，비열이공식피인입이해석반사혹투사파적폭치변화，미표면산사인자피창조성지인입래모의호접조조표면적각향이성특성；최후통과전파장광보건모증강간섭효과，재차기출상환장해산법여광선추종선염광가상결합，구건료가응용우광선추종기적파동쌍향산사분포함수간섭모형，이정학지모의광적폭치화상위변동。실험결과표명，해모형능구유효지회제출교위핍진적호접채색효과。
To address the problems in realistic rendering of butterfly iridescences in computer graphics, this paper proposes a photorealistic simulation method, based on the thin film interference model. The method firstly constructs the multilayer film model, according to the ridge microstructures on butterfly wings; then it applies the multilayer film interference principle to model the mixed scattering characteristics of multiple reflections and transmissions of light inside films; The Fresnel formulae is employed to explain the amplitude variations of reflected or transmitted wave, and the microfacet scattering factor is creatively incorporated to model the anisotropic properties of rough surfaces of butterflies; finally, we augment the interference effects by full wavelength spectrum modeling and further combine the method with a ray tracing framework to construct the wave bidirectional scattering distribution function interference model, to accurately render the amplitude and phase variations of light. The experimental results demonstrate that our method can efficiently model the photorealistic iridescent colors of butterflies.