(2017-11-25, 10:12 PM)Doctor M Wrote: I think once you hit the Platinum and Diamond editions, too much damage has been done.

For me the worst damage is the degraining and that we can't get back..
I'm sure the colors are fixable.

For degraining, there's always grainplates.

One could always create a lut and then encode the AVS script with ffmpeg, then you just apply a -vf lut3d="name.cube" filter to have the color correction applied on encode.

BronzeTitan - VirtualDub filters can be used under AVISynth. I've done it before.

Koopa - Not a fan of grain plates. That's just allowing you to perceive the grain still exists when it doesn't. You are stealing from what is left of the image to do that.

titanic - A lot of Disney's 'restorations', Platinum, Diamond, etc. didn't just make changes like BronzeTitan is showing to simulate color timing changes. They often will outright repaint regions to a new color. Finding curves, gamma tweaks or whatever to fix it will fail because of this.
Additionally, Disney's tricksy visual fx are also often destroyed during digital cleanup, not just grain.

Well, the general rule for grainplates is to use that from the original film stock, if possible.

Grain plates and grain 'management' are commonplace in the industry, more so than you would think.

Doctor M Wrote: VirtualDub filters can be used under AVISynth.

I never tried that, thinking that the VDub filter would not be interactive under Avisynth. But once an acceptable coloring was attained on VDub, it could then be handled by Avisynth (as long as it can easily do any other processing VDub can't).

BTW, I found the VirtualDub filter Gradations Curve . .
http://members.chello.at/nagiller/vdub/index.html

In doing so, this recommendation came from another site for another VDub filter Color Mill . .
http://fdump.narod.ru/rgb.htm
It looks like your typical enter-the-numbers filter, which would be your typical Avisynth agony  .

Quote:A lot of Disney's 'restorations' ... will outright repaint regions to a new color.

Beetwaaf Wrote: One could always create a lut and then encode the AVS script with ffmpeg, then you just apply a -vf lut3d="name.cube" filter to have the color correction applied on encode.

I've always kept in mind DrDre's color correction tool v1.3 (with any updates). It uses analysis and LUT transference. Didn't know (or just glanced over) ffmpeg's function. Considering the Disney repainting, either of these approach might be the first step of reversing the Blu-ray (for it's resolution) back to a pre-restoration base. If Peter Pan was a pre-repaint restoration, then a one-step laserdisc to Blu-ray color-correction is a possible solution.

I was thinking about your "repaint regions to a new color". Actually, with the HSL color wheel in my paint program, it can be just as easily reversed.

I tried it on the Star Wars "lobster man" (as C3P0 walked into a dark side-room while looking for R2D2) shot. It was the George Lucas Personally Supervised® Blu-ray mess ... color CRUSH in half the picture area [see 2nd picture] and BLOWN Red (but they reduced the top-end to darken the whole thing, so you can't tell). Histogram color-correction [see 3rd picture] couldn't isolate lobster-man to adjust him. A narrowed range of HSL was able to do that without the corrections (Red for lobster-man, Yellow for C3P0) spilling over to other areas [see 4th picture] . .


This is the digital "repaint" before-and-after using the HSL color wheel. Normally the Red range is at the top and has a 60-degree range of the circle. Here, that range was narrowed to affect only the lobster-color flesh-tone. Then that range was shifted 20-degrees and de-saturated to blend naturally with it's immediate surroundings. The HSL default settings window is on the left and lobster-man color correction window is on the right . .


Digital magic restoration!  

Is this a dead conversation? I was hoping someone would be willing to try to whip up an avisynth script that balances the colors. Possibly using the 1991 laserdisc as reference (if that seems right).
I have some screenshots for comparison still available: http://www.mediafire.com/download/qykmip...er_Pan.htm

My color matching skills are poor. Partially because my knowledge is limited and partially because my color vision isn't the greatest.

Well, I can do some proof-of-concepts in Avisynth form.

Obviously, first would be DeHalo_alpha() like you did -- maybe try a few settings but your defaults look pretty good. Next, LimitedSharpen() (or the suggested, updated one) to restore the edge that DeHalo_alpha() softens when removing the haloing. Then, VDub's GradationCurves for (universal) color correction -- using the numbers I worked up for the previous test -- and tweaking them as necessary. Finally I'll try to get it into Avisynth through VDub by injecting the static settings-data (which was earlier suggested).

From there, you can add the suggested grain-plate(s). I've never tried that but I'm sure recommendations for which to use will come with the Avisynth implementation, too.