Sharpening DV footage

[Hotte]

Hi,

I was wondering if there is a way to sharpen dv sources (720x576 deinterlaced) without emphasizing the compression raster. I tried out many sharpeners basically all with the same ugly "silky" raster appearance result. Deblock_QED after the sharpening showed no improvement. The only method that somehow worked was awarsarp, but turned out to be an unsuitable sharpener for standard footage.

See the two samples original and sharpened with LSFMOD to see what I mean.

Any ideas ?

[jmartinr]

How did you deinterlace it and what is your goal? Do you want to encode it?

[Hotte]

This is 50i footage. I imported it into an Edius NLE 50p progressive project.

The project combines various source material (24p, 50i, 25p, 30p, 50p). I find that Edius' automatic deinterlacing is very good quality. Somewhat on a par with the slower QTGMC modes.

Usually I export from Edius using Canopus lossless Avi codec and reimport into Vdub/Avisynth to do e.g. MDegrain or sharpening postprocessing.

[jmartinr]

Until the pictures are approved it's hard to say something usefull.

It depends on your camera.

I've gotten nice results with a DV-camera in the past with motion adapted degraining and sharpening, like

SMDegrain(tr=2, RefineMotion=true, contrasharp=true, lsb=true)

See http://avisynth.nl/index.php/SMDegrain

[Reel.Deel]

Deblock_QED after the sharpening showed no improvement.

No surprise there, Deblock_QED (and other deblockers) are meant to be used right after the the source filter without any processing before hand. On interlaced sources I usually deblock first (if needed) and then deinterlace.

The original sample picture you uploaded looks like a bit like PointResize (or a similar artifact). The sharpener is probably just sharpening the artifacts already present in the source, try denoising and then sharpening. Do you have a small unprocessed video sample you can upload?

I find that Edius' automatic deinterlacing is very good quality. Somewhat on a par with the slower QTGMC modes.


That's a bold statement right there, seeing is believing :).

[Ghitulescu]

It looks like animes, and therefore they can't originate from a camcorder, but from VHS via a DV converter (like ADVC series, a camcorder or a dual deck).

[creaothceann]

(The plural of anime is anime.)

[TheSkiller]

No surprise there, Deblock_QED (and other deblockers) are meant to be used right after the the source filter without any processing before hand. On interlaced sources I usually deblock first (if needed) and then deinterlace.Right, but it's important to note that with interlaced video Deblock_QED needs to be wrapped like this (http://forum.videohelp.com/threads/361152-Correct-usage-of-Deblock_QED-for-Interlaced-footage). It should not be used alone right after the source filter if the video is interlaced.

[Reel.Deel]

Right, but it's important to note that with interlaced video Deblock_QED needs to be wrapped like this (http://forum.videohelp.com/threads/361152-Correct-usage-of-Deblock_QED-for-Interlaced-footage). It should not be used alone right after the source filter if the video is interlaced.

Indeed, although I use the original suggestion from here (http://forum.doom9.org/showthread.php?t=131198#post1059181) without the Merge(SelectEven(),SelectOdd()). I don't see much of a difference without it. Was it you (http://forum.doom9.org/showthread.php?t=165297#post1581083) that added that? Anyways for those who want more information about deblocking before deinterlacing see here (http://forum.doom9.org/showthread.php?t=136601&page=2#post1185608), here (http://forum.doom9.org/showthread.php?t=136601#post1121603), and here (http://forum.doom9.org/showthread.php?t=82264&page=45#post934083).

[TheSkiller]

Indeed, although I use the original suggestion from here (http://forum.doom9.org/showthread.php?t=131198#post1059181) without the Merge(SelectEven(),SelectOdd()). I don't see much of a difference without it. Was it you (http://forum.doom9.org/showthread.php?t=165297#post1581083) that added that?No, I didn't add it, I quoted it from here (http://forum.videohelp.com/threads/361152-Correct-usage-of-Deblock_QED-for-Interlaced-footage). The link to that thread can be found on the avisynth.nl page of Deblock_QED (here (http://avisynth.nl/index.php/Deblock_QED)) which is how I found it.

[Reel.Deel]

Yeah, I added that link to the wiki but the odd thing is this post (http://forum.doom9.org/showthread.php?t=165297#post1581083) by you predates it. So I was under the impression you had added that line. :confused:

[Hotte]

Hi, you guys pointed me into the right direction!

It was Edius to produce most of the blocks. With qtgmc slow the blocks are much much weaker and leave headroom for sharpening. So much better now!

The wrapped Deblock_QED suggestion by TheSkiller did not really change anything except for an irrelevant less bit of noise. Strange enough...

jmartinr, I am already using MDegrain3 for denoising.

I would love to denoise even more regardless of processing time. Any suggestions ?

Also antialiasing of the residual blocked lines after sharpening - but I assume this would drop sharpness again - right ?
I tried daa3mod() (no parameters) but it had absolutely no effect.