基于矢量间角度计算的物理正确的光反射率模型的建立

Y. Zavalniuk, O. Romaniuk, A. Snigur, R. Shevchuk
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摘要

本文提出了一种新的基于矢量间角度计算的物理正确反射率模型。分析了主要的双向反射分布函数群的特征。基于角度计算的模型允许近似具有低次函数的标准龙Blinn模型。为了提高震源区辉光形成的真实感,对近似的Blinn模型进行了修正系数的修正。编制了计算修正模型修正系数的计算机程序。提出了符合节能规律的修正模型归一化系数。利用TuringBot软件建立了系数公式选择的数据集。从计算的变量中选择归一化系数公式。1与半球面积分反射率值的绝对误差值不大于210^(-2)。所建立的物理正确的反射率模型可用于高真实感的计算机图形系统。
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THE DEVELOPMENT OF PHYSICALLY CORRECT LIGHT REFLECTANCE MODEL BASED ON ANGLE CALCULATION BETWEEN VECTORS
The new physically correct reflectance model based on angle calculation between vectors is proposed in this article. The main bidirectional reflectance distribution functions groups characteristics are analyzed. The models based on angle calculations allow to approximate the etalon Blinn model with low degree function. The approximated Blinn model was modified with correction coefficient in order to increase the realism level of the epicenter zone glow formation. The computer program for the modified model correction coefficient calculation was developed. The modified model normalizing coefficient for the energy conservation law adherence was proposed. The dataset for the coefficient formula selection using TuringBot software was created. The normalizing coefficient formula was selected from calculated variants. The absolute error value between 1 and hemispherical integral reflectivity value is not bigger than 210^(-2). The developed physically correct reflectance model can be used in high realism level computer graphics systems.
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