AntcuFaalb

First question: Is aliasing a problem for the entire GOUT or just ANH?

Discussions of the bugs in GOUT are strewn all over the forum. I’d like this thread to serve (well, this post) as a reference for the easily-correctable ones.

The definition of a bug in this context is left intentionally open. Question marks will be used to indicate a need for more information and/or examples.

Please don’t list things like: “DVNR! har har har!”. An exception is the infamous speeder shot because a replacement can be dropped in from an LD source (and color-corrected) without being too distracting.

Please do mention if a problem in NTSC GOUT is fixed in PAL GOUT or vice versa.

All

• Missing frames
• Aliasing
• Haloing
• Over-represented reds?

ANH

• NTSC version has more detail
• Soundtrack not faithful to the '77 mix?
• AR is off (less horizontal resolution) in a shot in Ben’s hut
• 139-frame infamous speeder shot is DVNR’d to hell

TESB

• NTSC version has more detail
• Chroma shift

ROTJ

• PAL version has more detail

Here's a GOUT-related question: Assuming that we don't make any color changes beforehand, how much do the reds need to be lowered to fit in with the rest of the colors? That is, what change would result in them no longer being over-represented? Is it just the reds?

Also, I just experimented and determined that applying the contrast-fix after Technicolor() preserves details in very bright scenes, but still has the desired effect.

I just noticed this. WOW!

Edit: It seems like the contrast is definitely too high now.

Here's contrast=1.4 and a tiny bit of sharpening (that is, UnFilter(42, 0)):

Interesting! Increasing the contrast to 1.4 seems to solve the problem without having to resort to dialing-down the reds.

Edit: It also fixes issues I was having the grain in the sky in some scenes. It looks great!!!

Thanks for this excellent information! Can we do something similar for VHS?

bkev said:

Black... magic? Wasn't that the software Laserman had planned to use with the X0 project? Intriguing!

I don't know, but he may have "borrowed" the dedicated-workstation version of it from work.

Does anyone here have experience with or access to this software?

bkev said:

Judge for yourself here. Their transfer was done many many years ago, so I doubt it. DJ has gone on record numerous times saying that he thinks it's crap... I think...

Yeah, unfortunately, it looks in need of a good comb filter.

Yes, Chewie did a DVD of Arnie.d's raw X9 capture as I recall. I don't want to piss on his/their effort and Mallwalker's huge undertaking of uploading these, as I'm very grateful but the truth is that those captures doesn't accurately represent how those LD-transfers look, something clearly went wrong in the capture chain, they aren't smear-free at all, the colors are bleeding and there's a chroma shift that's nowhere to be seen on the actual LD's. Arnie d's V8 DVD is actually superior to his lossless X9-capture but even that is its own beast, examine for yourself. I think it's very unfortunate when the hardware and good will was there but I never got any answers to this when I asked in the thread, It's hard to put forth without sounding like an ungrateful bastard.

So is the Dark/Sega JSC Preservation of higher (visual) quality?

OK, raw capture #1 has been uploaded.

negative1 said:

AntcuFaalb said:

Hm. That might look a bit on the cool side, but it's definitely better than red balance you had before!

OK, I can do <10. I think I'll have to determine the best value experimentally... somehow.

match it up against harmy's technicolor version

for the closest approximation.

 

that is what you're doing right?

 

later

-1

That's a great idea, thanks!

Also, know that my goal here is not one of preservation; that is, I'm not trying to get a '77 IB Technicolor colortiming. Rather, my goal is to give Star Wars a look-and-feel similar to the 3-strip Technicolor films of the 30's-50's; e.g., The Adventures of Robin Hood (1938) and The Wizard of Oz (1939). (More recently, The Aviator used some digital witchcraft to get that look in post-processing.)

I know the trilogy isn't supposed to look like that, but I find the look so appealing that I figured it'd be worth a try.

Hm. That might look a bit on the cool side, but it's definitely better than red balance you had before!

OK, I can do <10. I think I'll have to determine the best value experimentally... somehow.

Also, interestingly, I find that it fixes the black-levels nicely (without having to touch AviSynth's Levels() function). Look closely:

Is the following better? I dialed back the reds by 10.

I downloaded raw captures #2 and #3 last night and I was able to repair both with MultiPar. Enjoy!

I'll be uploading raw capture #1 in a little bit.

bkev said:

It's a very slippery slope considering the high red level in the GOUT whenever increasing the saturation. Despite that, these newest shots look okay. I'm a bit distracted by how stretched they are though, haha.

My only problem is, again, the reds. And that's really only a problem with the second shot in this set.

I can dial-down the reds with RGBAdjust, but I don't know how much that'll impact the "benefit" of the filter. I'll try it out.

They shouldn't be stretched, as I only did cropping.

OK, so I've tried to exercise some restraint. Increasing the contrast to 1.3 (thereby lowering the pseudo-technicolor effect) results in:

function Technicolor(clip c)

{

  red_matte = c.ChannelMixer(100, -50, -50, 100, -50, -50, 100, -50, -50).Invert()

  green_matte = c.ChannelMixer(-50, 100, -50, -50, 100, -50, -50, 100, -50).Invert()

  blue_matte = c.ChannelMixer(-50, -50, 100, -50, -50, 100, -50, -50, 100).Invert()

  red = c.Overlay(green_matte, mode="multiply").Overlay(blue_matte, mode="multiply")

  green = c.Overlay(red_matte, mode="multiply").Overlay(blue_matte, mode="multiply")

  blue = c.Overlay(red_matte, mode="multiply").Overlay(green_matte, mode="multiply")

  return MergeRGB(red, green, blue)

}

gout = AVISource("E:\GOUT.avi", audio=false, pixel_type="YUY2", fourCC="HFYU").Crop(6, 102, -2, -104, true)

StackVertical(gout.subtitle("gout"), gout.Tweak(cont=1.3).ConvertToRGB32(matrix="Rec601").Technicolor().ConvertBackToYUY2(matrix="Rec601").subtitle("mine"))

(PS picasa web albums are a huge pain to use on the forum.  what site do you guys use to host pics?)

I use imageshack.us. You don't need an account if you rip the URL(s) out of view source after uploading your image(s).

althor1138: That looks like good work, but it may not be a good idea to follow the website in the OP. Here's a comparison between my AviSynth version of the GIMP filter and the final image on that website.

Edit: Here's my function without any contrast nonsense...

function Technicolor(clip c)

{

  red_matte = c.ChannelMixer(100, -50, -50, 100, -50, -50, 100, -50, -50).Invert()

  green_matte = c.ChannelMixer(-50, 100, -50, -50, 100, -50, -50, 100, -50).Invert()

  blue_matte = c.ChannelMixer(-50, -50, 100, -50, -50, 100, -50, -50, 100).Invert()

  red = c.Overlay(green_matte, mode="multiply").Overlay(blue_matte, mode="multiply")

  green = c.Overlay(red_matte, mode="multiply").Overlay(blue_matte, mode="multiply")

  blue = c.Overlay(red_matte, mode="multiply").Overlay(green_matte, mode="multiply")

  return MergeRGB(red, green, blue)

}

negative1 said:

AntcuFaalb said:

 

Hey, -1. Yes, I'm using the raw GOUT for this. It's GOUT on top and GOUT.Technicolor() on the bottom in the images above.

This is all a work-in-progress, of course. Converting between color-spaces seems to be tripping me up, so I'm going to learn more about that before progressing.

ok,

yeah, i know you're messing around with it..

i don't have a problem with the GOUT colors or DVD's,

 

in fact it looks pretty good to me most of the time,

even in these comparisons the colors look more

'right' to me.. currently.

 

looking forward to see what else you can

get out of them..

 

later

-1

 

 

Me, too. I'm going to have to learn quite a bit about color-space conversions before I'm able to do anything more. Hopefully someone with more knowledge can take my current Technicolor function and make it work well.

Maybe it's just me, but I've always enjoyed warm/over-saturated colors; e.g., The Wizard of Oz. I love the color in this.

negative1 said:

could you label your pictures?

 

i take it the bottom pictures are the

newer ones?

 

the contrast seems way too high?

the skin colors look really red,

and in the first picture, the red light

(in the upper left), loses almost all the detail in it..

 

maybe less would look better..

i'm not sure how the technicolor script

is working,  are you using RAW gout 

screencaps?

 

later

-1

Hey, -1. Yes, I'm using the raw GOUT for this. It's GOUT on top and GOUT.Technicolor() on the bottom in the images above.

This is all a work-in-progress, of course. Converting between color-spaces seems to be tripping me up, so I'm going to learn more about that before progressing.

I spotted a minor error. Here's the corrected script.

Edit: See post #11.