Iíve previously posted about the small program PtBi that I use to display 360 and PS3 games. Today I added the ability to use NVidiaís FXAA ó thanks to them for releasing the code to the public domain and making it easy to integrate.
For those that are unaware, FXAA is a post-processing method that tries to reduce the amount of aliasing artifacts (think pixel staircase) in an image. Itís similar to MLAA in that aspect. Like all post-processing methods that act purely on image data, it has some drawbacks:
- It canít handle subpixel aliasing well. (Unlike most similar methods, it at least tries to reduce it though)
- Sometimes aliasing may be detected incorrectly, resulting in an overblurring of the image. PtBi can mitigate this by adaptive sharpening after the FXAA pass.
- Particularly when used as a post-filter external to a game, itís impossible to distinguish between UI and rendered 3D elements. This results in some UI distortion.
Advantages are that it can be used on any image data, it is really good at smoothing the edges it detects and itís very fast. On my system, with YUV decoding, FXAA and adaptive scaling on, it still only takes less than 5 ms for a frame to be completely processed. Another nice point is that it can be used on top of images generated with eg. 2xMSAA (like many modern console games) and still achieve an improvement in edge quality.
[More pictures/comparison screenshots]
Source: PS3Hax via NeoGaf