Restoring new life to old film classics

[jagabo]

Blur also allows different amounts of blur horizontally and vertically: http://avisynth.org/mediawiki/Blur

I haven't any of the specific dehalo filters. I'll have to check them out.

[carlmart]

I am having some difficulty in finding the blur filter. It's not listed as such in the Filter Collection or anywhere else. Where do I get it?

It's built in. Just use it without loading anything:

Blur(1.0)

I think you can use any decimal up to and including 1.54.

I did try using it with lsfmod and I didn't like it.

In fact I put the trims through 4 different combos, adding one filter at a time, and the one which seems to improve things most, without getting over the top, is this:

ChromaShift(c=-2)
ConvertToYV12
UnDot()
spline36resize(720,480)
Trim(8000, 9000)

Using this things are clearer and detail is still there.

Personally, when removing halos I prefer to use a halo-specific filter, one such as BlindDeHalo:

I already have blinddehalo in plugins, but I couldn't quite understand the syntax.

[jagabo]

ChromaShift(c=-2)
ConvertToYV12
UnDot()
spline36resize(720,480)
Trim(8000, 9000)

Are you still dealing with that Wings MPEG 2 source? If so, you probably don't need the ConvertToYV12 because MPEG 2 decoders usually produce YV12 output already. And the frame size is already 720x480 so the Spline36Resize isn't necessary.

[carlmart]

ChromaShift(c=-2)
ConvertToYV12
UnDot()
spline36resize(720,480)
Trim(8000, 9000)

Are you still dealing with that Wings MPEG 2 source? If so, you probably don't need the ConvertToYV12 because MPEG 2 decoders usually produce YV12 output already. And the frame size is already 720x480 so the Spline36Resize isn't necessary.

Certainly so about the resize. I wasn't sure about the YV12.

Anything else you think might improve things? I didn't try blinddehalo yet. Are you familiar with it to suggest what I might start with?

[jagabo]

Note you can use Info() to get information about the video state anywhere within the script.

[carlmart]

Note you can use Info() to get information about the video state anywhere within the script.

How's that? What information do I get?

[manono]

Among other things it'll tell you the colorspace, so you'll know that you don't need the ConvertToYV12() line when it's already in YV12. Just try it, you'll see.

[carlmart]

OK. Info is implemented.

Does anyone have a clue on how you handle blinddehalo?

I don't think there's much else I can use to improve on what I showed, right?

In any case it made some improvements.

The problem in this video mods are identifying and properly naming specific problems. So if someone could tell me what I should see, correcting it or not, should help me a lot to understand this thing.

Thanks!

[jagabo]

Does anyone have a clue on how you handle blinddehalo?

How far have you gotten? The link manono gave shows the arguments.

[carlmart]

I'm sorry, Manono. I had skipped your very useuful links. Will apply them and get back with what I get.

Thanks, Jagabo.

[carlmart]

Well, it seems to get better and better. My latest script was this:

ChromaShift(c=-2)
BlindDeHalo2(2.0,2.0,100)
UnDot()

Things seemed to improve with the dehalo filter. I am looking at the test trim on a 42" plasma screen, and there's a definite improvement. The "dirt" seemed to vanish a bit.

I tried more dehalo, but things got foggy.

It looks as that combo seems right for "Wings of Eagles".

Now I will go back to "Drums along the Mohawk" and check what else to do there.

[carlmart]

UPDATING RESTORATION

"The wings of the eagles" went quite fine using the filters I mentioned, and is now a wonderful DVD.

Now I am going back to the oldest "Drums along the Mohawk". I have uploaded a small m2v piece for anyone to see.

http://www.mediafire.com/?dnyz4ya3n1m

As you will see there are plenty of chromashifts, particularly on the widest scenes. But we could take the "Kings Road" sign as a starting point. On the left vertical stick, the blue bleeds in with a green vertical halo. On the lower horizontal stick, there's a horizontal red bleed on the low border.

I see you can correct vertical chroma, but is it possible to correct horizontal chroma shift for specific colors?

Resolution is a problem, and I don't think there's much more we can extract from it.

[jagabo]

is it possible to correct horizontal chroma shift for specific colors?

You can shift U and V horizontally separately with ChromaShift(u=?, v=?). But not vertically. You should be able to compensate for this by rotating the frame 90 degress (turnleft() or turnright()), shifting U and V separately, then rotating back. I'm not convinced that video requires any chroma shift though.

Resolution is a problem, and I don't think there's much more we can extract from it.

The resolution in that video looks fine to me.