Real-time selective antialiasing

Przemyslaw Rokita

doi:10.1117/12.525036

18 May 2004 Real-time selective antialiasing

Przemyslaw Rokita

Proceedings Volume 5297, Real-Time Imaging VIII; (2004) https://doi.org/10.1117/12.525036
Event: Electronic Imaging 2004, 2004, San Jose, California, United States

Abstract

Antialiasing is still a challenge in real-time computer graphics. In this paper we present a real-time selective antialiasing solution that builds upon our experience. We investigated existing approaches to real-time antialiasing and finally found a new simpler solution. Our new idea is to use the z-buffer directly for extracting visible edges information. The solution presented here can be summarized as follows: 1) select objects edges by applying on the z-buffer spatial convolution with Laplacian; 2) filter out aliasing artifacts by applying lowpass spatial convolution filtering to selected pixels. In this approach the same circuit architecture can be used for selection and the antialiasing of selected pixels. The major advantage of using spatial convolution in the context of antialiasing is hat general purpose hardware real-time convolution filters are well known and available. Method presented here can be used to improve image quality in graphics accelerators but also applications such as real-time ray tracing.

Citation Download Citation

Przemyslaw Rokita "Real-time selective antialiasing", Proc. SPIE 5297, Real-Time Imaging VIII, (18 May 2004); https://doi.org/10.1117/12.525036

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KEYWORDS

Convolution

Computer graphics

Electronic imaging

Image quality

Ray tracing

Real time imaging

Spatial filters

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