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Real-Time Depth-of-Field Rendering Using Anisotropically Filtered Mipmap Interpolation

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3 Author(s)
Sungkil Lee ; Dept. of Comput. Sci. & Eng., Pohang Univ. of Sci. & Technol. (POSTECH), Pohang ; Jounghyun Kim, G. ; Seungmoon Choi

This article presents a real-time GPU-based post-filtering method for rendering acceptable depth-of-field effects suited for virtual reality. Blurring is achieved by nonlinearly interpolating mipmap images generated from a pinhole image. Major artifacts common in the post-filtering techniques such as bilinear magnification artifact, intensity leakage, and blurring discontinuity are practically eliminated via magnification with a circular filter, anisotropic mipmapping, and smoothing of blurring degrees. The whole framework is accelerated using GPU programs for constant and scalable real-time performance required for virtual reality. We also compare our method to recent GPU-based methods in terms of image quality and rendering performance.

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Visualization and Computer Graphics, IEEE Transactions on  (Volume:15 ,  Issue: 3 )