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Old 18th May 2008, 01:45   #21  |  Link
WorBry
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I haven’t had opportunity to test TempGaussMC with other ‘shimmery’ scenes as yet, but with the ‘striped tee-shirt’ clip I posted above I cannot see that either the script posted by Map1742 or that suggested by Scharfis offer an improvement on YadifMod.NNEDI alone, in this context

Here are the results:

Spline36Resize(1024,height)
bob(0.0, 1.0)
i=last
mdata = DePanEstimate(i)
DePanStabilize(i, data=mdata)
AssumeFrameBased().SeparateFields().SelectEvery(4,0,3).assumefieldbased().weave()
yadifmod(order=0, mode=1, edeint=nnedi(field=-2))
Scripted_MVDegrain5() # as posted by Didee

http://rapidshare.com/files/11566271...-YV12.avi.html


yadifmod(order=0, mode=1, edeint=nnedi(field=-2))
i=last
mdata = DePanEstimate(I, pixaspect=1.454)
DePanStabilize(i, data=mdata, , pixaspect=1.454)
Scripted_MVDegrain5() # as posted by Didee

http://rapidshare.com/files/11566355...-YV12.avi.html

Compare with the results for yadifmod(order=0, mode=1, edeint=nnedi(field=-2)) alone and for TempGaussMC, as posted above (post # 9)

I might add that the clip was shot with OIS (Optical Image Stabilization) on. Whilst OIS theoretically degrades ‘image quality’ (assumed resolution) by around 10% (according to Panasonic), this is a vast improvement on Electronic Image Stabilization, which for those Panasonic cams that use it, is reckoned to degrade quality by as much as 30-40%. As you can see (from the Depan borders), even in my shaky little mits, the clip is reasonably steady for a hand-held shot. I should maybe include some shots with OIS off (hand-held and tripod) in my further tests.

@Map1742, I agree aliasing is a problem with consumer-level DV cams, and the GS400 is quite prone to it - probably a by-product of the 3CCD pixel-shift technology. There’s some evident in this clip on the wall beading. One thing I do note is that your routine removes this quite effectively, but so does YadifMod.NNEDI plus MVDegrain5 alone. Delete the MVDegrain5 step from your script and the aliasing comes back. So the reasonable conclusion would be…….

Perhaps you could provide some clips that demonstrate the benefits of your pre-deinterlace processing.
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Old 18th May 2008, 02:38   #22  |  Link
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Well, I tested a little around, too, and it has been interesting. Examined DV sequences were this one of yours, WorBry, and the one that Terka once peddled with. Then I looked at some of the notorious VQEG Test Sequences.

With map1742's script, there wasn't much noticeable improvement, the usual flicker just keeps being there. That's what I had expected. Flicker reduction only gets better when 'thSAD' for MVDegrain is cranked up to *very* high values, but then you start getting artefacts on moving objects.
Also I'm having an issue with DePanStabilize producing a green stripe beneath the right frame border, can't tell why. (Never used it before.)

The interesting part was testing TempGaussMC. I had expected all kinds of issues when throwing such a rather primitive brute-force processor at difficult content, but ... there are no serious ones! Just a slight loss of detail/shadings (and noise as well), but apart from that, it's very promising. In those parts where MCBob shines, it's quite close. And in those parts where MCBob fails, it's pretty good instead ...

This little plantlet must be cultivated. With some STT fertilizer and a few twists, it could become a strong one.
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Old 18th May 2008, 03:31   #23  |  Link
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Ah, the VQEG test sequences, we are knowing them well I see they've added a few more and fancified the index....probably due to the notoriety.

Just a query about the 'sharpness' param in TempGaussMC. What are the intervals/limits, or more specifically, is the (default) 11.66 denominator in the calc a constant value (i.e. sharpness is modulated purely by the tr0, tr1, tr2 values) or a variable that can be tweaked? Not that I'm planning on much tweaking at this point
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Old 18th May 2008, 15:04   #24  |  Link
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Well, the sharpness thingy is 100% arbitrary. It's just a "sharpen(x)" (plus repair-limiting) thrown between the two MVDegrain calls, to counteract softening that might come from the temporal averaging. The 11.66 denomoinator was chosen arbitrarily to end up with a default of sharpen(0.6) when all temporal radii are maxed out. The possible range for setting it manually is 0.0~1.0, because that's what sharpen() allows.
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Old 18th May 2008, 17:19   #25  |  Link
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OK, thanks.
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Old 20th May 2008, 13:32   #26  |  Link
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Bugfix for TempGaussMC:

I was thinking too easy and managed to use incorrect weightings in Merge() to create the gauss.

The function in post#13 is correct now.

That was an embarrassing bug. I feel ashamed.
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Old 20th May 2008, 15:38   #27  |  Link
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Didée!
Please explain why need calculating fv4,fv5, bv4,bv5 vectors? Value this vector not use MVDegrainx. It is feature MVTools?
With kind regards yup.
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Old 20th May 2008, 16:08   #28  |  Link
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Oh, indeed. There was an error in Scripted_MVDegrain5, too ... I fed the 2nd MVDegrain with the wrong vectors.
The script has been corrected. Thank you for noting!
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Old 20th May 2008, 16:25   #29  |  Link
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May be for noisy source usefull other approach. We use only MVDegrain1 but using mask which calculate ME error and use previous, current and next frame or previous -2 previous current or current next next +2. This very good for my VHS capture source. Also we can use multipass. I think about this more time but can not formalizing. Also we need care luma value for dark scene we need degrease THSad.
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Old 20th May 2008, 16:43   #30  |  Link
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OK I’ve had a little time for some testing. Dug around a bit in my home video DV archives and frankly I’ve been hard pressed to find scenes that TempGaussMC doesn’t cope with completely. Put together a little collage that you might want to look at in your tweaking. This one is all 4:3 DV.

http://rapidshare.com/files/11629337...V_4.3.avi.html


Scene 1. More electrified stripy tee-shirts. Some residual shimmer on the finer-line red one.

Scene 2. On the Farm. Some reduction in the shimmering of the vertical slats on the barn wall, relative to MCBob. Maybe too much to expect that this can be eliminated completely without excessive distortion/ blurring – more of a camera resolution limitation issue?

Scene 3. Safari Sofa. Nigh-on perfect calming of the shimmer on the cushion patterns.

Scene 4. Toy car mat. Again excellent calming of shimmers on the car mat pattern and edges of the cupboards. Just some very slight aliasing in places

Scene 5. Jumpy ride. Threw this one in just to see how well it copes with a very jerky motion scene, and it does so very well. Just a little more distortion of the wire mesh than MCBob, but it’s very close.

I won’t upload the Huff-YV12 outputs for TempGaussMC and MCBob as they are too large.

Cheers.

Edit: PS - I used the bug fixed version.
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Old 20th May 2008, 16:48   #31  |  Link
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@ yup: If you want to discuss about a new denoising strategy, that's fine, but please open a new thread for that. This thread is mainly about deinterlacing flicker.
(Also, you don't need to speak in Oxford English or something, really. But try to be a bit more verbose on what is the new point in your idea, and why it would/should work better than existing solutions.)

That said, I don't claim that MVDegrain5 (or -7 or -10 or -25) is very useful. It's just that map1742 posted a script that used such a function, and most people couldn't try it out because MVDegrain5 wasn't posted somewhere. That's why I made it.
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Old 20th May 2008, 17:31   #32  |  Link
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@ WorBry: Thanks for the clip. I'll definetly keep it for testing.

One thing to note about TempGaussMC is that it does a much "easier" (say: sloppy) job than any bob filter: a true bob filter has to keep the original fields unchanged, i.e. with xyzBob().SelectEvery(4,0,3).Weave() one should get back the original interlaced input, pixel-identical.
TempGaussMC doesn't care about that, it processes both the interpolated and the original fields. That's most probably okay for the usual application where one often does some denoising etc. after bobbing anyway. Still, this behaviour disqualifies that approach as being a "clinic" bob filter.
(And MCBob also produces less shimmering when the need to keep original fields untouched is removed ... it's MCBob's internal clip "repaired".)
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Old 21st May 2008, 03:30   #33  |  Link
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Quote:
Originally Posted by Didée View Post
with xyzBob().SelectEvery(4,0,3).Weave() one should get back the original interlaced input, pixel-identical.
Surely SeparateFields before the SelectEvery....?

Yeah, for the helluvit, I re-interlaced just to see what it would look like on a typical software player that uses simple bob & weave (like PowerDVD). Doesnt look bad but edges tend to be wavy in parts.
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Old 21st May 2008, 21:00   #34  |  Link
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Rrrrrrrrr .... yes, definetly with SeparateFields before the SelectEvery. <swears>

There'll be another update to TempGaussMC today or tomorrow. A little tweaking here, a little addition there, and it handles practically everything that I've tried in a visually satisfying way. Much better on shaky motion, but still stable on static or slowly moving areas. Your clip seems fine, VQEG sequences ToyTrain, Musicians, Rugby and Formula-1 are fine. (The only funbreaker is "Scrolling Text", but that one is almost impossible anyway [the green letters!].)
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Old 22nd May 2008, 12:04   #35  |  Link
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sounds interesting..
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Old 22nd May 2008, 23:44   #36  |  Link
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New version up in post#13.

Major change:
- repairing of temporalsoften-ghosting for 'searchlip' (parameter "rep0") results in better motion estimation. Together with "rep1" (similar repairing on the end result) this gives better results in high-motion areas.

Minors:
- defaults for temporal radii reduced to (2,2,1). For most things, (2,1,1) should give reasonable stable output. If you need even more, use (2,2,2).
- sharpening now can be bigger than 1.0
- "border=1" makes sure that half-scanlines at top & bottom also don't flicker. (clip internally padded, since some filters don't process 1st & last line of their input)

It's still not a "lossless" bob filter, since the original fields are changed by the filter chain. But the results IMHO are pretty nice visually. If visual quality is more important than PSNR / SSIM scores, give it a go.
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Old 23rd May 2008, 00:29   #37  |  Link
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Very nice and definitely faster I'm surprised folks over in the 'film-look' thread havent twigged onto this. Maybe I'll give them a nudge

Note:

Quote:
Originally Posted by Didée View Post
Minors:
- defaults for temporal radii reduced to 2,1,1. Should give reasonable stable output for most things. If you need even more, use 2,2,2.
The defaults in the script are 2,2,1, not 2,1,1. I'm assuming the former is correct?
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Old 23rd May 2008, 01:04   #38  |  Link
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Oops, a typo. The default is (2,2,1) just because it's in the middle between the even faster (2,1,1) and the even calmer (2,2,2). Post above corrected.

Here's another example of a source that drove me nuts in the past:



Sample (Mediafire.com)

Left: YadifMod(mode=1,edeint=NNEDI()) -- Right: TempGaussMC(2,2,2). Not uber-perfect, but way beyond all past results.
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Old 23rd May 2008, 01:16   #39  |  Link
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Quote:
Originally Posted by Didée View Post
....Not uber-perfect, but way beyond all past results.
Definitely
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Old 23rd May 2008, 15:24   #40  |  Link
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The example looks really good! Good work!
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