Three-strip Technicolor: Please help! — Page 2

I just noticed this. WOW!

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

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.

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?

frank678 said:

AntcuFaalb said:

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?

 

This is pretty much THE question for me. I saw some posts where someone indicated they could repair the red channel out of the RGB channels. My understanding is that the red shift is an organic shift in the film - its not the red channel is damaged but the greens and blues have faded leaving the red over represented. Anyone know how correct that is? If so can the green and blue be repaired?

edit: had a go at a blind ajustment to blue and green curves to find a result = http://originaltrilogy.com/forum/topic.cfm/Calling-all-Color-Correctors-Can-this-source-yield-a-different-set-of-results-to-Gout/post/598240/#TopicPost598240

 

I asked You_Too to provide some examples of the over-represented reds (if possible) in my GOUT Bugs thread.

OK, so GOUT has over-represented reds. Challenge accepted!

Enter YellowMagic™ (a joke on Laserman's BlackMagic and _,,,^..^,,,_'s WhiteMagic).

I'm not claiming that these colors are correct, but I believe this may be right approach to de-emphasizing the reds in GOUT.

gout = gout.Tweak(cont=1.1, sat=1.3).ConvertToRGB24(matrix="Rec601")

gout.Overlay(gout.BlankClip(color=$D29628), mask=gout.ShowRed(), opacity=0.1, mode="lighten")

The $D29628 color was chosen because (1) it's yellowish, (2) it's close to -1's crawl text color, and (3) I didn't know what else to choose.

Pay close attention to skin-tones. Also, note how high I'm setting the saturation. This approach works for even higher saturation values.

Can someone please try my method with $CDAA96 instead of $D29628? A screenshot or two would be greatly appreciated. (I don't have access to my computer right now.)

Great job.  I'd say it's definitely an improvement. 

Here's your latest method with a couple extra steps for the other 2 channels. The saturation is over the top just to give a better idea of what's happening.

EDIT: Just to be clear the first image is unsaturated.  The bottom 2 contain the same saturation tweak.

source=avisource()
rgb= source.Tweak(cont=1.1, sat=1.1).ConvertToRGB24(matrix="Rec601")
fixr=source.Overlay(rgb.BlankClip(color=$FFFF00 ), mask=rgb.ShowRed(), opacity=0.1, mode="lighten")
fixg=fixr.overlay(rgb.blankclip(color=$00ffff),mask=rgb.showgreen(),opacity=0.15,mode="chroma")
fixb=fixg.overlay(rgb.blankclip(color=$ff00ff),mask=rgb.showblue(),opacity=0.15,mode="chroma")
test=source.tweak(sat=2)
comp=stackhorizontal(source.subtitle("original",x=-1),fixb.tweak(sat=2).subtitle("adjusted",x=-1),test.subtitle("original (saturated)",x=-1))
comp

althor1138 said:

Great job.  I'd say it's definitely an improvement. 

Here's your latest method with a couple extra steps for the other 2 channels. The saturation is over the top just to give a better idea of what's happening.

EDIT: Just to be clear the first image is unsaturated.  The bottom 2 contain the same saturation tweak.

source=avisource()
rgb= source.Tweak(cont=1.1, sat=1.1).ConvertToRGB24(matrix="Rec601")
fixr=source.Overlay(rgb.BlankClip(color=$FFFF00 ), mask=rgb.ShowRed(), opacity=0.1, mode="lighten")
fixg=fixr.overlay(rgb.blankclip(color=$00ffff),mask=rgb.showgreen(),opacity=0.15,mode="chroma")
fixb=fixg.overlay(rgb.blankclip(color=$ff00ff),mask=rgb.showblue(),opacity=0.15,mode="chroma")
test=source.tweak(sat=2)
comp=stackhorizontal(source.subtitle("original",x=-1),fixb.tweak(sat=2).subtitle("adjusted",x=-1),test.subtitle("original (saturated)",x=-1))
comp

looks pretty good to me..

later

-1

-1: Agreed. It does look pretty good.

With that being said, I think this approach deserves more exploration. Would anyone like to meet on IRC to brainstorm?

I'd be willing to meet up and chat about it.  I haven't used IRC in like 10 years though so I'd have to brush up on it.  Where would you want to meet?

There should be a place for OT'ers to hang out and chat realtime.  Is there one already?

EDIT: can somebody point me to a good(free) irc program?  Apparently MIRC costs money now. 

althor1138 said:

There should be a place for OT'ers to hang out and chat realtime.  Is there one already?

 

EDIT: can somebody point me to a good(free) irc program?  Apparently MIRC costs money now. 

There are plenty, but I'd suggest trying mibbit.com's web-client first.

Well I think that adding yellow to the red is a bad idea.  After a little bit of research it seems that it should be something like this:

RED-Add cyan

Green-Add magenta

Blue-Add yellow

source=avisource()
 rgb= source.ConvertToRGB()
 red=rgb.showred().overlay(source.blankclip(color=$00FFFF),mask=rgb.showred(),mode="chroma",opacity=.5)
 green=rgb.showgreen().overlay(source.blankclip(color=$FF00FF),mask=rgb.showgreen(),mode="chroma",opacity=.9)
 blue=rgb.showblue().overlay(source.blankclip(color=$FFFF00),mask=rgb.showblue(),mode="chroma",opacity=.1)
newrgb=mergergb(red,green,blue)
mix=source.overlay(newrgb,mode="chroma",opacity=1.0)

return(mix)

This seems to work a lot better imo. The opacity for each channel has to be tweaked scene by scene still.  Is anybody still pursuing this?

EDIT: Forgot to add tweak to the last variable so you might wanna do that and tweak it up really high. Somewhere between 3 and 5.

althor1138 said:

Well I think that adding yellow to the red is a bad idea.  After a little bit of research it seems that it should be something like this:

RED-Add cyan

Green-Add magenta

Blue-Add yellow

source=avisource()
 rgb= source.ConvertToRGB()
 red=rgb.showred().overlay(source.blankclip(color=$00FFFF),mask=rgb.showred(),mode="chroma",opacity=.5)
 green=rgb.showgreen().overlay(source.blankclip(color=$FF00FF),mask=rgb.showgreen(),mode="chroma",opacity=.9)
 blue=rgb.showblue().overlay(source.blankclip(color=$FFFF00),mask=rgb.showblue(),mode="chroma",opacity=.1)
newrgb=mergergb(red,green,blue)
mix=source.overlay(newrgb,mode="chroma",opacity=1.0)

return(mix)

This seems to work a lot better imo. The opacity for each channel has to be tweaked scene by scene still.  Is anybody still pursuing this?