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- Title
Efficient Ray Tracing Through Aspheric Lenses and Imperfect Bokeh Synthesis.
- Authors
Joo, Hyuntae; Kwon, Soonhyeon; Lee, Sangmin; Eisemann, Elmar; Lee, Sungkil
- Abstract
We present an efficient ray-tracing technique to render bokeh effects produced by parametric aspheric lenses. Contrary to conventional spherical lenses, aspheric lenses do generally not permit a simple closed-form solution of ray-surface intersections. We propose a numerical root-finding approach, which uses tight proxy surfaces to ensure a good initialization and convergence behavior. Additionally, we simulate mechanical imperfections resulting from the lens fabrication via a texture-based approach. Fractional Fourier transform and spectral dispersion add additional realism to the synthesized bokeh effect. Our approach is well-suited for execution on graphics processing units (GPUs) and we demonstrate complex defocus-blur and lens-flare effects.
- Subjects
RAY tracing; PARAMETRIC processes; BOKEH (Photography); LENSES; GRAPHICS processing units; RENDERING (Computer graphics)
- Publication
Computer Graphics Forum, 2016, Vol 35, Issue 4, p99
- ISSN
0167-7055
- Publication type
Article
- DOI
10.1111/cgf.12953