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Laserschwert

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Join date
27-Sep-2004
Last activity
25-Jun-2025
Posts
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Post
#72552
Topic
.: The Zion DVD Project :. (Released)
Link
https://originaltrilogy.com/post/id/72552/action/topic#72552
Time
All right, time for some screenies regarding my "new" ghostbusting-method. The old method (using the Exorcist-filter in VirtualDub) caused some new halos, so I guess it wouldn't work that way. Here's a comparison between the old and the new one:

http://www.scummbar.com/mi2/temp/oldnew3.gif

On first sight they look similar, but let's take a closer look, by brightening up the image:

http://www.scummbar.com/mi2/temp/oldnew1.gif

As you can see, the old method caused quite an ugly halo to appear left of Leia's face, which of course resulted from brightening up that "halo-area" (of course there was no halo visible in the original source, instead the color was SUPPOSED to be dark there... but how could the filter know that?). So I thought it was necessary, to not brighten up dark halos, and ONLY darkening the bright halos, which worked very well through AviSynth, by layering an offset version of the image on top of the original, using the "Darken" transfer-mode.

All right, we've got rid of the bright halos, and there's no "new" halo on the left side. But, as you might notice, there's now a dark-halo on the right side on Leia's hair. OK, this halo IS supposed to be brighten up, but we can't do that, because... well, have a look at the next image:

http://www.scummbar.com/mi2/temp/oldnew2.gif

You see that black part on the Stormtrooper's arm? If we would use a filter to brighten up the halo around Leia's hair, the black part on the stormtrooper would get a bright halo... something we don't want (it's looking good in the original). But since it's only in the dark parts of the image, i guess we could leave it this way.

Here's the AviSynth-script:
    v1=AviSource("e:\zion.avi").ConvertToYUY2.GuavaComb(mode="NTSC").SeparateFields.SelectEvery(10,0,1,2,3,4,5,6,9).Weave.AssumeFPS(23.976)

    v2=v1.crop(4,0,0,0).AddBorders(0,0,4,0, color=$FFFFFF).blur(.5)

    v3 = overlay(v1,v2, opacity=0.2, mode="Darken") # remove only bright halos

    return v3

I guess now it's necessary to IVTC in AviSynth, since the image gets blurred in line 2. This requires the video to already be "IVTC"ed, because blurring a video with fields is basically suicide.
Post
#72505
Topic
.: The Zion DVD Project :. (Released)
Link
https://originaltrilogy.com/post/id/72505/action/topic#72505
Time
I think the halo-problem can't be solved through chroma-shifting, since it's a BRIGHTNESS-problem... I guess the exorcist-filter works by multiplying an inverted version of the image on top of the original (but only in the overlapping parts, caused by the given offset). This results in bright areas getting darker, and dark areas getting brighter, which in most cases is fine. Unfortunately, some dark areas (like those which were black before) don't need to get brighten up, and so this causes some errors.

I have found a little workaround for this through AviSynth, although by this workaround only the bright-halos get removed. But since these are the most visible ones, I think it might be an option. I'll post the script and some screenshots later.
Post
#72490
Topic
.: The Zion DVD Project :. (Released)
Link
https://originaltrilogy.com/post/id/72490/action/topic#72490
Time
Originally posted by: ChainsawAsh
Looks really good! Except there is a blue halo around the right side of some objects (notably faces) and a red halo around the left side...this is particularly noticeable in the shot of Leia where you can see all 4 stormtroopers around her, but it's noticeable in the one you posted here.


Oh shit!!! I've never noticed these "new" halos, and after some testing I've found out that they are the result of the "Exorcist" filter... damn.... that tool is supposed to remove ghosting-artifacts, and it works by shifting the luminance to the side a bit, and multiplying it with the image. Well, it DID remove the bright halos around the edges, but now it's obvious, that it introduces some new halos as well... damn, damn, damn!!!

So, basically, it's all my fault...

Post
#71336
Topic
.: The Zion DVD Project :. (Released)
Link
https://originaltrilogy.com/post/id/71336/action/topic#71336
Time
Well, LucasFilm and all its "sub"-companies do appear to all act the same when it comes to their fanbase... never a "nice work, people!", always a "please don't!". I run a site named LucasArts Soundtracks, and although their decision (as seen on the main page) was quite reasonable, their mails contained no praise or "thank you" in any way, it's just a dry "You're not supposed to...".
Post
#70796
Topic
.: The Zion DVD Project :. (Released)
Link
https://originaltrilogy.com/post/id/70796/action/topic#70796
Time
Dude, we've already changed mails on an almost regular basis... I am Jan! But no trading yet, the Brisco-set isn't even close to being finished. By the way, it's gonna be in PAL, and it's gonna have a German language track (besides the English one, of course). And regarding "Parker Lewis", no, didn't get it from MySpleen, I got it from eDonkey a while ago (in German, so it wouldn't be too interesting for you).
Post
#70744
Topic
.: The Zion DVD Project :. (Released)
Link
https://originaltrilogy.com/post/id/70744/action/topic#70744
Time
OHHH, you mean that "bounce"... I thought you meant jerky frames. No, THAT bounce was already on Zion's capture. If you look closely, you see that the image doesn't just shift, it literally "waves" like a flag (in frame 302 the lower part of the image moves to the left, and in frame 303 the upper part follows... looks like some analogue error... old videotapes sometimes show this artifact). I am not sure if this is already on the laserdisc, or if it occured during capturing.

Zion?
Post
#70635
Topic
.: The Zion DVD Project :. (Released)
Link
https://originaltrilogy.com/post/id/70635/action/topic#70635
Time
Maybe you haven't read the entire thread, I haven't done any "thought out" color-correction (that's Zion's job ). I have adjusted the levels judging by the brightness range of only the first shot, which is very good for this, because there you have the lights at the ceiling (which are 100% white) and Vader's costume (which in parts is 100% black).

Compared to TK47's screenshots from the screenshot-thread (I don't have the actual DVDs) my version has FAR better levels:

TR47's version:
http://img79.exs.cx/img79/25/TR47_000.jpg

My version:
http://www.scummbar.com/mi2/temp/anh5.jpg

Notice the difference? My version isn't too dark... TR47's version is too BRIGHT. See how in his screenshot the distinction between the stormtrooper's helmet and the ceiling light - as well as the helmet's rim under the two gray shapes - is completely lost? The same goes for the upper edge of the backpack-thingy. Or the shoulder of the stormtrooper on the right side of the frame. Much better detail in my version, I think.
Post
#70621
Topic
.: The Zion DVD Project :. (Released)
Link
https://originaltrilogy.com/post/id/70621/action/topic#70621
Time
In case anybody's interested, I've put my result up for DOWNLOAD (~10MB).

And Zion, if you're interested, here's my AviSynth-script to IVTC the thing:

AviSource("e:\zion.avi").ConvertToYUY2
SeparateFields
SelectEvery(10,0,1,2,3,4,5,6,9)
Weave
AssumeFPS(25) # for NTSC this should be 23.976
Return last


I guess instead of using the "SelectEvery"-command, and entering the frame order by yourself, some IVTC-plugs will yield the same results.

And here's the filter-qeue I used for VirtualDub:

http://www.scummbar.com/mi2/temp/vdub.gif

As you can see I did the resizing and letterboxing in VirtualDub after all. The sharpening might not be necessary (I think I didn't use it for the example-MPG I posted), as well as the Levels-filter. Note that the result of this scripts is a PAL-clip... just change the framerate to 23.976 and the final size to 720x480 (mine isn't anamorph, by the way).

One more thing: For your raw captures the Exorcist-filter has to be set to 4 pixels, not 3 as I posted earlier (that was the value suitable for your screenshots only).
Post
#70601
Topic
.: The Zion DVD Project :. (Released)
Link
https://originaltrilogy.com/post/id/70601/action/topic#70601
Time
@Zion:

If I remember correctly I read about the TOOT-filter (or something similar) in the Doom9-forums, and if you really have three different sources to capture from, you can even use this thing to remove noise, since most probably a lot of the noise is different in the three sources (except of course for the noise, that's already been on the scanned film images), and it'll only keep the stuff that's the same in all three sources. I don't know how good this might work (and our result is already pretty clean, so I guess even this "elaborate" approach to noise reduction isn't needed). By the way, in the forum this method was used with several captures from the SAME source, which helps removing (analog) noise end errors that occured during capturing.

If you use this filter with captures from different sources, you have to scale, crop and basically line them all up PERFECTLY (down to the pixel)... I am not sure if this is possible at all, if the image is slightly rotated or skewed (might happen when scanning film images).
Post
#70506
Topic
.: The Zion DVD Project :. (Released)
Link
https://originaltrilogy.com/post/id/70506/action/topic#70506
Time
Mmh... did you use my settings for the "Exorcist"-filter? Because your image still contains some halo... though I am sure they are the result of your sharpening filter applied, because this time they're on both sides. Maybe you should try the Xsharpen approach (which means scaling the image up to something like 2000x1000, applying that filter, and scaling it back, down to 720x480. The filter sharpens by another method, which won't induce halos). But while my method doesn't produce halos, I've gotta admit that your method very nicely sharpens the detailed areas (although there's some combing visible):

http://www.scummbar.com/mi2/temp/anh3.gif

http://www.scummbar.com/mi2/temp/anh4.gif

http://www.scummbar.com/mi2/temp/anh5.gif

Of course my levels are a little different (but yours are better... I haven't spend much time on my color). But note that I haven't used a noise filter at all (and I still don't think it's necessary... the film-grain adds a little detail, and if you're going for a dual-layer-disc, you won't have to worry about compression, I guess).