Saturday, April 14, 2012

D800 Redeemed! Moire ain't no more, eh?

Thanks to David Cubanski of Mosaic Engineering (, the downscaling insufficiencies of Nikon Engineering are being mitigated. See below the very encouraging results of a prototype test for an antialiasing filter designed specifically for the D800's sensor at video resolutions.

See that awful false color moire in the bricks on the house? The aliasing on the shingles and the particularly egregious issues with the window on the right?

And with the filter:

Without filter:

With filter:

Note the aliasing of the power lines--they nearly disappear in some cases, and that familiar rainbow on the house.

And with the filter:

These are screen grabs from 1080 24p footage recorded internally with a picture profile set halfway between default and ideal. By that I mean that contrast and sharpening are NOT set to 0 but neither are they set to their default positions. I split the difference. Reasons for this are that sharpening exacerbates the aliasing issues and I wanted to try the filter in a scenario common to what many people may shoot.

These tests, shot outdoors in changing light conditions with a prototype model, are primitive but promising. Couple with an external HDMI recorder (with compatible EDID, updated firmare, and range between camera and recorder conciding), we have ourselves a mighty fine D800!

Thanks Mosaic Engineering!


  1. No way to remove moire in post as with stills?

  2. Yes, there are methods depending on whether the false pattern has interfered with the color only or luma channels. Google for more info, but one way is to inversely apply the 'B' channel in LAB mode to the 'L' channel to cancel out the pattern. Other techniques involve blurring and are successful to varying degrees. Adobe has incorporated a slider for moire reduction in recent versions of their software as well.