Color matching and prediction: color correction tool v1.3 released! — Page 12

I think for today, I like the Tech IB the best followed by the GOUT although neither are what I would consider perfect.  :-)

Here's a screenshot of the bluray matched to another scan of a 35 mm print of the same frame:

"green haze in dark areas" = "RGB crush" flush?

GREEN crush the worst, RED not too bad, BLUE minimal

[individual RGB channels 0-inverted; white-reduced to isolate natural contrast from crush-hilighting]

I have corrected frame 8228. I think this is what it's supposed to look like without a green shift:

Bluray:

Corrected:

I think a lot of Tech prints of the time had a green shift? Or at least a lot of the Star Wars IB prints?

Though to be fair, there is similar "green shift" in AntcuFaalb's VHS bootleg (not taken from a British IB Tech, but from a regular USA Eastman Kodak print), and on the official 70mm collectible film cells (which were from a new 70mm positive - 1995 LPP stock, according to the edge codes - and came from an "original internegative", which apparently had near-fully intact color as recently as 20 years ago!)

Also, back in 2012 someone posted this in the DeEd thread:

"I have owned and/or had access to multiple Star Wars (the original) 35mm prints and screened numerous others as well (been in the theater exhibition biz for a long time). I remember seeing SW in the theater probably a dozen times during its 77-82 runs. The one fairly unifying factor in all of those prints (including mine) was the muted colors and almost greenish hue. There were a much smaller percentage that had excellent color that was more robust (but never popping mind you).  But by and large, especially at the smaller theaters, the prints always looked more muted."

So maybe the green "shift" was on most/all of the original theatrical print run? (Verta? Can you weigh in on this?)

I think the new "Corrected" one is a little too purple, like you went too far correcting the green.

-G

g-force said:

I think the new "Corrected" one is a little too purple, like you went too far correcting the green.

-G

 Yeah, I think you're right. This looks a lot better:

TServo2049 said:

I think a lot of Tech prints of the time had a green shift? Or at least a lot of the Star Wars IB prints?

Though to be fair, there is similar "green shift" in AntcuFaalb's VHS bootleg (not taken from a British IB Tech, but from a regular USA Eastman Kodak print), and on the official 70mm collectible film cells (which were from a new 70mm positive - 1995 LPP stock, according to the edge codes - and came from an "original internegative", which apparently had near-fully intact color as recently as 20 years ago!)

Also, back in 2012 someone posted this in the DeEd thread:

"I have owned and/or had access to multiple Star Wars (the original) 35mm prints and screened numerous others as well (been in the theater exhibition biz for a long time). I remember seeing SW in the theater probably a dozen times during its 77-82 runs. The one fairly unifying factor in all of those prints (including mine) was the muted colors and almost greenish hue. There were a much smaller percentage that had excellent color that was more robust (but never popping mind you).  But by and large, especially at the smaller theaters, the prints always looked more muted."

So maybe the green "shift" was on most/all of the original theatrical print run? (Verta? Can you weigh in on this?)

 The photos from the Senator screening seem to suggest that print did not have a green shift, like many of the others:

Weird, I always thought those pictures looked greenish too, but if you think they don't...

I know the Senator print had color differences from the IB print(s) the reference stills come from - the shots in the light saber duel of Ben and Vader in front of the big doorway looking out toward the Falcon had an overpowering blue tint, but there is a picture of the same scene from the Senator and the colors looked more "normal".

DrDre said:

g-force said:

I think the new "Corrected" one is a little too purple, like you went too far correcting the green.

-G

 Yeah, I think you're right. This looks a lot better:

that looks perfect to me! How different is this correction from when you were using Verta's Leia pic?

-G

g-force said:

DrDre said:

g-force said:

I think the new "Corrected" one is a little too purple, like you went too far correcting the green.

-G

 Yeah, I think you're right. This looks a lot better:

that looks perfect to me! How different is this correction from when you were using Verta's Leia pic?

-G

 This one is based on on a 35 mm frame that can be found on thestarwarstrilogy.com:

I matched the bluray to this reference:

I then first manually adjusted the curves to reduce the green shift, and after overdoing it, I used a white balancing script in MATLAB to get to the final result:

Here's another frame corrected in a similar way, by first matching to a print, and then further correcting color shifts, etc.

Bluray:

Match to print:

Correction:

I've been working on an automated correction for color shifted sources. Here are some preliminary results:

Edit: accidentally deleted picture. 

I think you're right. Back to the drawing board...

Having looked at the photos of the Senator screening, I came to the conclusion that the panels in the back, should not be gray, but more beige. I now think this would be my final color grading for frame 8228:

Senator print:

Bluray:

Harmy's Despecialized Edition 2.5:

DrDre color grading:

^^ I quite like that.

-G

I think this looks just right, i compared it with some older versions and it looks much nicer.

I love that look. I think I will prepare a short video sample of this sequence, to see how it looks in motion.

This publicity shot seems to confirm that the panels are indeed beige, and not gray:

Here's another frame from the same scene, color corrected with a color correction model, based on the color correction for frame 8228.

Bluray:

DrDre color grading: