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DrDre

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Members
Join date
16-Mar-2015
Last activity
6-Sep-2024
Posts
3,989

Post History

Post
#954170
Topic
Color matching and prediction: color correction tool v1.3 released!
Time

Chewtobacca said:

Thanks for checking, but I’ve tried uninstalling all previous versions and MATLAB and then reinstalling, but that pop-up box still won’t go away. I’ll keep trying.

EDIT: Once again, the tool seems to function as it should when I increase the number of color spaces to maximum.

Could you send me two of the frames (test and ref), that you were having problems with?

Post
#954154
Topic
Color matching and prediction: color correction tool v1.3 released!
Time

Chewtobacca said:

I’m having a problem with the box that pops up saying: Building color matching model, please wait….
Unlike previous versions of the tool, only part of the white bar goes red; after that, it stops and remains in place, even when the model has obviously been constructed and can be used to color-match images.

For me, the tool also seems slower than previous versions, even after selecting Fast processing mode. I’m using the default settings. Is anyone else experiencing this?

EDIT: Well, increasing the number of color spaces to maximum seems to increased the speed, which is the opposite of what I’d expect. The box that pops up has disappeared too. Strange!

Perhaps you should try reinstalling the tool, after you’ve removed earlier versions. I’ve tested the stand alone version, and it works just fine on my laptop. Building a color matching model using the default settings (10 color spaces, fast processing mode) for a 1080p test and reference frame takes 18 seconds. The same process takes 2 minutes and 20 seconds on the previous version of the tool.

Post
#949190
Topic
Color matching and prediction: color correction tool v1.3 released!
Time

nightstalkerpoet said:

Hey DrDre

Since you appear to be our resident “build algorithms from scratch” guy, I have a request.

Multiple projects on this site use some form of an average of multiple captures or sources.

I’ve seen a few different ways people are doing this, but they appear to be limited to mean and median averages. IMO, a mode average would be the preferred method of averaging in this specific instance, but I’ve never found a plugin or tool that implements mode. Avisynth would be the preferred platform, but perhaps it’s something you could implement in a matlab environment?

Is this something you could/would be willing to look into?

Not sure if I will have the time available, but I will dwell on it for a little while…

Post
#947965
Topic
Star Wars Trilogy SE bluray color regrade (a WIP)
Time

g-force said:

DrDre said:

yotsuya said:

DrDre - you sir are a master. That is it. Perfection.

Thanks, I like them a lot also!

Good idea for another source to use! but… Some look a bit blue, some too bright, some with a lack of contrast. Not loving them I gotta say.

Do the same for the JSC, and the LPP, and the IB, and this one, throw out the outliers, average the results, and then you may have something.

-G

There’s still some color variation, because I applied a single correction to the entire sequence. The variation is part of the source sadly. A bluray matched to this source definitely would require a second pass to unify the colors, but many print scans are really no different. However, I think there’s something lurking in there…

Post
#945865
Topic
The Original Trilogy restored from 35mm prints (a WIP)
Time

Poita and Williarob both have a beta version of the color restoration tool I’ve developed. Hopefully they’ll be able to put it to good use. Here’s an example of what the tool can do to aid the process of restoring the colors of the red faded TESB print scan, that poita will be using for his restoration:

Post
#945831
Topic
Estimating the original colors of the original Star Wars trilogy
Time

canofhumdingers said:

That final correction of the emperor shot above is obviously a marked improvement over the untouched or the “non blue” versions, but it still feels a bit too pinkish.

This is why I said, you should in practise use a frame for calibration, that’s closer to the frame you want to correct. 😉 This was only an example to show the process, not an example of a final correction.