Blur Busters Forums

Who you gonna call? The Blur Busters! For Everything Better Than 60Hz™ Skip to content

TestUFO Anti aliasing visibility test question

NEW for 2017: Discussion about the www.TestUFO.com Blur Busters Motion Tests. Widely used by enthusiasts, display tweakers, reviewers, monitor manufacturers and VR headset makers!

TestUFO Anti aliasing visibility test question

Postby Strobe » 02 Sep 2019, 12:05

That AA test on testufo.com website, you can turn the anti aliasing of that white line on and off. My question is, what type of anti aliasing was is used when its set to "on"?

There is many different types of anti aliasing with many different settings, I have no idea what specific type of anti aliasing of what specific strenght is used when its set to ON setting.

For example, is it 4x AA or 16x?? 8bit color depth requires alot more than even 16x AA for maximum aliasing suppression, the higher the dynamic range (bit depth), the higher the anti aliasing needs to be to avoid banding.
Strobe
 
Posts: 1
Joined: 27 Aug 2019, 04:48

Re: TestUFO Anti aliasing visibility test question

Postby Chief Blur Buster » 02 Sep 2019, 21:05

Strobe wrote:That AA test on testufo.com website, you can turn the anti aliasing of that white line on and off. My question is, what type of anti aliasing was is used when its set to "on"?

Browser default AA, provided by Javascript. I'm not sure what AA algorithm is in use, but probably simple linear AA used for line drawing that was available since the pre-GPU days.

Strobe wrote:the higher the anti aliasing needs to be to avoid banding.

Banding from a far distance is often more linked to gamma used in the AA blending -- rather than the AA algorithm. This is because of the average brightness of an analog pin prick at any arbitrary point along the grid, is not always constant along the axis, and can even be noticed when pixels are smaller than human resolution. There are some articles and papers that covers this sort of thing.

Strobe wrote:For example, is it 4x AA or 16x??

AA for line-drawing does not have a multiplier value.
It is frequently done using the Wus Algorithm but there are a lot of other AA algorithms used during line-drawing. However, the specifics of the AA algorithm used by the default JavaScript line drawing function, is a black box to the software developer.
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

       To support Blur Busters:
       • Official List of Best Gaming Monitors
       • List of G-SYNC Monitors
       • List of FreeSync Monitors
       • List of Ultrawide Monitors
User avatar
Chief Blur Buster
Site Admin
 
Posts: 6315
Joined: 05 Dec 2013, 15:44


Return to Test UFO Motion Tests

Who is online

Users browsing this forum: No registered users and 2 guests