Author Topic: Anti-Aliasing: Best Solution for Aliasing in Low Resolution RAW video Upscaling (Read 58837 times)

Roman · « **Reply #25 on:** June 08, 2013, 02:11:31 PM »

Quote from: 3pointedit on June 08, 2013, 11:50:15 AM

Infact this is exactly how I shoot computer monitors at work. Often you find a moire effect when the screen pitch matches that of the camera resolution (a form of extreme brick wall). The easiest way to solve this is to back off focus just a little bit. But sure you get a little contamination in the blacks/edges.

Or perhaps, (if lighting allows) stop down as far as you can go, to introduce diffraction... I think that's essentially the same as what the aliasing filter does.

araucaria · « **Reply #26 on:** June 08, 2013, 08:09:13 PM »

Quote from: Roman on June 08, 2013, 02:11:31 PM

Or perhaps, (if lighting allows) stop down as far as you can go, to introduce diffraction... I think that's essentially the same as what the aliasing filter does.

I tested that on the 50d but it looks very bad as you get everything in focus and you start getting aliasing and halos everywhere. Best thing is to have just a few objects in focus and the rest slightly out of focus, this makes everything nice.

apefos · « **Reply #27 on:** June 08, 2013, 10:31:55 PM »

The optical filter have some advices to use in specific lenses and distances, needs tests... Maybe VAF-Txi will be better option, but I do not have it and do not know if it will be useful for 960x544 cropped sensor, needs tests...

I agree when the image starts to go out of focus the aliasing decrease and disappears. In low resolutions raw shooting a very small amount of "out of focus" can help.

I saw the algorithm test. I believe the Instant HD is different... I think it has some proprietary algorithm which corrects the aliasing in the edges and keep the rest of image untouched. In the same way the Power Retouche plugin does. I tested the power retouche, but the render time is infinitely slow and results are not better than Instant HD, (at this moment it is just 32bits, a 64bits version is on it's way), see:

http://powerretouche.com/Antialias_plugin_tutorial.htm

Here it is a 600D dng file, just some wires against the sky for aliasing tests, do your own settings in ACR:

http://www.apefos.com/upload/000240.dng

N/A · « **Reply #28 on:** June 08, 2013, 10:47:06 PM »

I found a cool one last night, Alien Skin Blow Up. Anyone used it before?

apefos · « **Reply #29 on:** June 08, 2013, 11:43:16 PM »

Interesting! Deserves a try!

I found this page also, lots of comparisons in there (it seems these people did a try in almost everything):

http://www.infognition.com/articles/video_upsize_methods_comparison.html

http://www.infognition.com/articles/video_resize_shootout.html

apefos · « **Reply #30 on:** June 09, 2013, 12:05:24 AM »

others:

http://www.fredmiranda.com/RP/

http://after-effects.softalizer.com/

N/A · « **Reply #31 on:** June 09, 2013, 04:55:16 AM »

Check out this free plugin for AE, uses b-spline.

https://sites.google.com/site/katisvideotoolbox/smooth-bspline-scaler

apefos · « **Reply #32 on:** June 09, 2013, 05:01:12 AM »

Alien Skin BlowUp3 turns T3i 600D into a Pocket Cinema Camera!

No aliasing, just NOTHING, NADA!

Upscales PERFECTLY, much better than InstantHD.

Only wires against sky shows a small amount of aliasing (much less than InstantHD), but this is expected.

Worth every penny!

(Just some advices: it is slower than InstantHD, rendering upscaling frames takes long time... and batch processing just works in LightRoom using still images, batch processing does not work in Photoshop, it does not work in video files also. My tests was done in jpg files exported from the dng, I do not know if it can be applied to dng files in LightRoom, needs tests)

N/A · « **Reply #33 on:** June 09, 2013, 05:32:49 AM »

I'll have to check it out then, ~~that free one was crap lol~~. ACR was better.

I take that back, didn't realize OpenGL had to be off. Gonna test it some more.

apefos · « **Reply #34 on:** June 09, 2013, 11:42:49 AM »

more options:

http://www.benvista.com/photozoompro

http://www.fixerlabs.com/EN/upsize/sizefixer/sizefixerxl.htm

(the last one is supposed to be better than blowup3, but slower)

araucaria · « **Reply #35 on:** June 09, 2013, 12:51:43 PM »

Here two screen grabs, before/after defringe in ACR to get rid of false color detail:
without [50d at 1596x636]
http://farm9.staticflickr.com/8404/8994151471_89d1925783_o.jpg
with
http://farm8.staticflickr.com/7400/8994152585_2664ed408c_o.jpg

apefos · « **Reply #36 on:** June 09, 2013, 01:38:59 PM »

wow, excelente results with defringe!

a review comparing blowup3 and sizefixer, maybe the new version of sizefixer is faster, the article is old...

http://photo.it-enquirer.com/2011/11/review-alien-skin-blow-up-3-vs-sizefixer-xl/

apefos · « **Reply #37 on:** June 09, 2013, 02:29:33 PM »

a comparison between sizefixer and blowup3. blowup3 is more plastic look, but sizefixer does not remove aliasing completely. add a small amount of film grain simulation can be a good solution for both, to hide the imperfections and bring a more analog film look. both are 960x544 upscaled to 1920x1088.

apefos · « **Reply #38 on:** June 09, 2013, 02:48:04 PM »

and here is the instanthd vs default 200%

N/A · « **Reply #39 on:** June 09, 2013, 02:59:50 PM »

Blow Up with film grain would look great imo, too bad its not fot AE

apefos · « **Reply #40 on:** June 09, 2013, 03:05:22 PM »

yes, I already did a try, blowup3 with film grain is perfect! you cannot tell it was shoot in 960x544, looks like fullhd for sure. I think it will be even better if using the defringe in acr before upscaling. I used sharpening 30 / 1 / 10 in acr and worked fine, no need sharpening in blowup3.

sizefixer is a little bit better than instanthd, but just a little bit...

but instanthd works in after, so it is faster and easier to do.

maybe we could do a petition for Alien Skin to develop a version for after...

Doyle4 · « **Reply #41 on:** June 09, 2013, 03:08:58 PM »

I found that importing the dng's into photoshop and in the Raw dialog box that opens at the bottom you can change the size, i found that when filming in 1280x720 and changing it in this box and then using an automate script to then descale down to 1920x1080 from say 2034 when upscaled in the raw settings box, it gave really nice clean results at 1080p ill try and post some results.

apefos · « **Reply #42 on:** June 09, 2013, 03:19:57 PM »

Please upload some screen shoots showing us how to do it. Also tell us the steps to find this scaling dialog box.

Doyle4 · « **Reply #43 on:** June 09, 2013, 03:24:23 PM »

Sounds daft but how do i upload an image? sorry new to this forum.

Sure, if you like the results im more than happy to show you how, the samples also have no sharpening added, i left it as standard so you get the idea of what you get.

Doyle4 · « **Reply #44 on:** June 09, 2013, 03:28:57 PM »

Ill make a screencapture video, be easier

apefos · « **Reply #45 on:** June 09, 2013, 04:04:46 PM »

ok, it will be nice to see the screen capture video!

Doyle4 · « **Reply #46 on:** June 09, 2013, 04:12:09 PM »

Almost done mate, uploading now

Doyle4 · « **Reply #47 on:** June 09, 2013, 04:19:04 PM »

Its in process now so heres the link when its ready

apefos · « **Reply #48 on:** June 09, 2013, 04:33:56 PM »

Hi, thanks for the video, I saw it.

When I open the 960x544 dng in ACR, in the same dialog box you have the resolutions, it does not have other resolution to choose. Maybe I am using an old version?

Doyle4 · « **Reply #49 on:** June 09, 2013, 04:41:50 PM »

No problem,
Sorry its not a great tutorial, was just something quick for you.

I think you could have an old version, I'm running 7.4 or it could be that the resolution you are filming in cant be upscaled in ACR, i have some photos that wouldn't for some reason but again that was on an old version.

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Author Topic: Anti-Aliasing: Best Solution for Aliasing in Low Resolution RAW video Upscaling (Read 58837 times)