Fully analytic shading model with specular reflections for polygon-based hologram
Fully analytic shading model with specular reflections for polygon-based hologram
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基于多边形的全息图的具有镜面反射的完全解析着色模型
DOI：
10.1016/j.optlaseng.2022.107235
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发表时间：
2022
影响因子：
4.6
通讯作者：
Tomoyoshi Shimobaba
中科院分区：
文献类型：
--
作者：
Fan Wang;Harutaka Shiomi;Tomoyoshi Ito;Takashi Kakue;Tomoyoshi Shimobaba
对于基于多边形的全息图，与基于光谱插值的方法相比，完全解析算法的效率非常出色。然而，由于每个三角形的幅度均匀，完整的解析算法不利于物体的渲染。在本文中，我们提出了一种基于完全解析光谱的着色渲染方法。我们使用 Blinn-Phong 反射模型来模拟具有真实光照的场景，并在不改变采样的多边形数量的情况下渲染有光泽、光滑的物体表面。所提出的方法开发了近似指数函数来代替繁琐的漫反射和镜面反射，使我们能够导出完全分析的光谱。多个 3D 物体的计算结果表明，所提出的方法非常高效，并且由于解析方程而呈现出逼真的照明效果。
For polygon-based holograms, the efficiency of the fully analytical algorithm is outstanding compared with that of the spectral interpolation-based method. However, the full analytical algorithm is not beneficial for the rendering of objects, owing to the uniform amplitude of each triangle. In this paper, we propose a shading rendering method based on a fully analytical spectrum. We used the Blinn-Phong reflection model to simulate a scene with realistic lighting and render a glossy, smooth object surface without changing the number of polygons sampled. The proposed method develops approximate exponential functions to replace cumbersome diffuse and specular reflections, allowing us to derive fully analytical spectra. The computational results for several 3D objects show that the proposed method is highly efficient and presents realistic illumination effects owing to the analytical equations.