Realistic Rendering of Bokeh Effects

This paper proposes a new high quality rendering approach of bokeh effect based on geometrical optics theory.A sequential ray tracing technique based on refraction law for transporting light,is employed to accurately model optical imaging characteristics of a camera lens;the internal structure of a camera lens is precisely simulated,including the aperture stop and the vignetting stop,in order to simulate bokeh effect influenced by both the aperture shape and the vignetting;The geometrical optics theory and sequential ray tracing method are used to accurately estimate the position and size of exit pupil in a camera lens,improving the performance of ray tracing.The results show that our method can quickly render realistic bokeh effects with faithful influences from the aperture shape and the vignetting.