^ I didn’t say that the colors of the new BD were inaccurate – just that they were different from the previous releases. The point of my question was to ascertain which colors were being handled by DrDre’s algorithm, not to make any statement about the accuracy of the color-timing of any particular release.
^ I didn’t say that the colors of the new BD were inaccurate – just that they were different from the previous releases. The point of my question was to ascertain which colors were being handled by DrDre’s algorithm, not to make any statement about the accuracy of the color-timing of any particular release.
Ah, I see. Sorry, my mistake.
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So… I think I understand some of it, But what of the color casts in those three films? Were those done on purpose (Like to give the ROTJ some dark looks during the scenes with the emperor, which had a blue cast)?
Yes, filtered shots were done on purpose, and yes, they present a problem. If I understand correctly, the best way to handle them is to correct an unfiltered shot on the same reel, then use that same color adjustment on the filtered shot. e.g. if the whole reel has a pink shift, but one scene has a blue filter too.
Exactly, take the example of the red shifted ROTJ frames.
Correcting both frames indidually removes the red cast:
However, for the second frame the delibirate blue cast is also removed. Assuming the red cast is similar for the entire film, I can build a color restoration model based on the first frame, and use it to correct the second frame:
Now, the red cast is removed, but the delibirate blue cast is retained. In practise it is better to use a frame closer to the second frame for constructing the color restoration model, but you get the idea.
A thought just occurred to me. Wouldn’t it be useful to have the border scanned as well? My understanding is that it is printed using the photographic process, so it is the 3 color black and should faded in the same way. So couldn’t it be used to better predict the original unfaded colors? Just a thought. I like the way your algorithm works. It makes some very nice images.
A thought just occurred to me. Wouldn’t it be useful to have the border scanned as well? My understanding is that it is printed using the photographic process, so it is the 3 color black and should faded in the same way. So couldn’t it be used to better predict the original unfaded colors? Just a thought. I like the way your algorithm works. It makes some very nice images.
Yes, that would certainly be very helpful, if it is available.
It is helpful to calculate the shadow fade, as well as absolute black to use the space between frames, but the shadows midtones and highlights all fade at a different rate, so it is useful, but mostly for the blacks.
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The color balancing/restoration algorithm not only restores color, but also restores detail, as the detail is in the color information. Here’s an example for the severely red faded 70mm print of The Empire Strikes Back:
Here’s a screenshot comparison:
Wow! That’s impressive!
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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.
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.
Wish I had more to contribute, but I’m afraid most of my comments here are just similar “you’re an amazing wizard, DrDre” comments. Keep it up 😃
Wish I had more to contribute, but I’m afraid most of my comments here are just similar “you’re an amazing wizard, DrDre” comments. Keep it up 😃
Thanks! 😃
I just read about a new iOS app for “scanning” faded photo prints with the iPhone camera. The initial comments aren’t very encouraging, but it seems that this is proof of a broader (and marketable) hunger for color-restoration apps amongst photo enthusiasts:
http://www.dpreview.com/news/2782682139/unfade-for-ios-scans-and-restores-old-prints
Note some comments mentioning “Digital ROC Pro” on the Nikon Super Coolscan 9000ED still film scanner. This is one of the older color-restoration tools I’ve used with my own Coolscan 9000ED, and mentioned in one of my earlier comments back on page 1 of this thread. Digital ROC Pro seems to have been left to languish in 32-bit EOL-land, but might be worth a look if you haven’t already done so.
DrDre, I don’t think I’ve read you mentioning it… have you heard of the Digital ROC color-restoration processing plug-in by Kodak subsidiary Applied Science Fiction?
http://www.asf.com/products/plugins/rocpro/pluginROCPRO/
I don’t know that the product has been updated for many years. My Nikon film scanner came bundled with a version, but it only works during the scanning of film. Worked fairly well. Reminds me of your work on restoring color to red-faded motion picture film scans.
If your crop is water, what, exactly, would you dust your crops with?
DrDre you have a PM, Thanks.
Has this thread ceased to continue for some reason?
It doesn’t hurt to offer help, but it always hurts to disregard those that do.
I’m finding the silence exciting honestly. Dre has been online as recently as today but hasn’t posted in nearly a month after frequent posts. Amazing things are most likely happening behind the scenes 😃
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I anticipate big things as well. His Color Correct Tool is amazing and this Color estimation tool would be the icing on the cake! I spent hours last night rereading this whole thread to refresh my memory and make sure I didn’t miss anything, especially for the recent months.
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Hello there,
There are exciting things happening behind the scenes under the Team Blu banner, that I can’t divulge at the moment. At the same time I’ve been taking it a little easier, after a period of intense development. Recently a much faster version of the color matching tool was released, and poita and Williarob are testing the color balancing/restoration tool. To be continued…
I have been testing the BETA of the new Color Balance tool and the results are very promising 😃
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Those do look very nice, especially considering the extend of the fading in those shots. Thanks for showing these examples! 😃
Looks brilliant.
Williarob said:
I have been testing the BETA of the new Color Balance tool and the results are very promising 😃
Lucky fellow! The shot of the swordsman looks particularly nice.
Now you just need to use the tool on the shot of Indy shooting the poor bastard.
she/her
mwah