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NVIDIA working on Subpixel Reconstruction Antialiasing (SRAA)

Posted on Friday, January 28 2011 @ 21:43:01 CET by


NGOHQ spotted that NVIDIA is working on a new antialiasing technology to compete with AMD's MLAA (Morphological Anti-Aliasing). The new technology is called Subpixel Reconstruction Antialiasing (SRAA), here's a snip that describes NVIDIA's research:
"Subpixel Reconstruction Antialiasing (SRAA) combines single-pixel (1x) shading with subpixel visibility to create antialiased images without increasing the shading cost. SRAA targets deferred-shading renderers, which cannot use multisample antialiasing. SRAA operates as a post-process on a rendered image with superresolution depth and normal buffers, so it can be incorporated into an existing renderer without modifying the shaders.

In this way SRAA resembles Morphological Antialiasing (MLAA), but the new algorithm can better respect geometric boundaries and has fixed runtime independent of scene and image complexity. SRAA benefits shading-bound applications. For example, our implementation evaluates SRAA in 1.8 ms (1280x720) to yield antialiasing quality comparable to 4-16x shading. Thus SRAA would produce a net speedup over supersampling for applications that spend 1 ms or more on shading; for comparison, most modern games spend 5-10 ms shading. We also describe simplifications that increase performance by reducing quality."



 



 

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