Rendering realistic spectral bokeh due to lens stops and aberrations
Rendering realistic spectral bokeh due to lens stops and aberrations
复制标题
由于镜头光阑和像差而渲染真实的光谱散景
DOI：
10.1007/s00371-012-0673-4
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Fanjiang Xu
中科院分区：
文献类型：
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作者：
Jiaze Wu;C. Zheng;Xiaohui Hu;Fanjiang Xu
在合成图像中创建散景效果可以提高照片真实感，并强调有趣的主题。因此，我们提出了一种新的方法来呈现真实的散景效果，特别是色度效果，这是现有方法所缺乏的。该方法涉及两个关键技术：精确的色散透镜模型和高效的光谱绘制方案。该透镜模型是在真实透镜光学数据的基础上实现的，通过在模型中引入顺序色散光线追踪算法，考虑了物理透镜的波长依赖性。为了支持透镜色散的绘制以及新模型与双向光线追踪的融合，提出了该光谱绘制方案。渲染实验表明，该方法能够模拟出真实的因镜头光斑和像差（尤其是色差）造成的光谱散景效果，并且具有较高的渲染效率。
Creating bokeh effect in synthesized images can improve photorealism and emphasize interesting subjects. Therefore, we present a novel method for rendering realistic bokeh effects, especially chromatic effects, which are absent for existing methods. This new method refers to two key techniques: an accurate dispersive lens model and an efficient spectral rendering scheme. This lens model is implemented based on optical data of real lenses and considers wavelength dependency of physical lenses by introducing a sequential dispersive ray tracing algorithm inside this model. This spectral rendering scheme is proposed to support rendering of lens dispersion and integration between this new model and bidirectional ray tracing. The rendering experiments demonstrate that our method is able to simulate realistic spectral bokeh effects caused by lens stops and aberrations, especially chromatic aberration, and feature high rendering efficiency.