Match Tint [SUBMITTED]

[Shem Namo]

Hi everyone, hope you are doing great!!

I'm working on a keying tutorial, and needed to match the grade of the keyed foreground with the background.
I saw this interesting AE tutorial that uses AE's "Tint" effect to do exactly that.

So I made a DCTL fuse that maps the highlights of an input image to one color and the shadows to another color.
It's a pretty simple fuse, but it can be very useful.

I hope it can be useful to all of you.

Thanks again,
David

com.LearnNowFX.MatchTint.zip

[Millolab]

@Shem Namo A small suggestion: Why not adding a PreDivide/PostMultiply?

[Shem Namo]

Nice Suggestion @Millolab !!
I don't know what's the algorithm for that, do you happen to know it?

Thanks again.
David

Added in 19 minutes 24 seconds:
Never mind, I found it.

[Millolab]

well, I don't know any algorithm but the math is pretty simple: first you divide your RGB channels by the alpha, then do your tinting, then multiply RGB by the alpha again. That's all. How to implement that in a Fuse, well... I sadly don't know...

[Shem Namo]

Thanks @Millolab, I found the info in one of Vito's videos.
My only concern is: what if the alpha pixel is equal to 0?
Can't divide by zero.
I'll experiment for a little bit first.

Thanks again,
David

[Midgardsormr]

You'll need a test condition for alpha == 0, which will do nothing. It's pretty easy to verify your code against Fusion's own behavior. Check the Waveform subview on this:

Code: Select all

{
	Tools = ordered() {
		Background2 = Background {
			Inputs = {
				Width = Input { Value = 1920, },
				Height = Input { Value = 1080, },
				Depth = Input { Value = 3, },
				["Gamut.SLogVersion"] = Input { Value = FuID { "SLog2" }, },
				TopLeftBlue = Input { Value = 0.431, },
				EffectMask = Input {
					SourceOp = "Background1",
					Source = "Output",
				}
			},
			ViewInfo = OperatorInfo { Pos = { 529, 121 } },
		},
		Background1 = Background {
			CtrlWZoom = false,
			Inputs = {
				Width = Input { Value = 1920, },
				Height = Input { Value = 1080, },
				Depth = Input { Value = 3, },
				["Gamut.SLogVersion"] = Input { Value = FuID { "SLog2" }, },
				Type = Input { Value = FuID { "Gradient" }, },
				Start = Input { Value = { 0.482905982905983, 0.507604562737643 }, },
				Gradient = Input {
					Value = Gradient {
						Colors = {
							[0] = { 0, 0, 0, 0 },
							[1] = { 1, 1, 1, 1 }
						}
					},
				},
			},
			ViewInfo = OperatorInfo { Pos = { 406, 122 } },
		},
		Transform1 = Transform {
			Inputs = {
				ProcessAlpha = Input { Value = 0, },
				Center = Input { Value = { 0.282868525896414, 0.5 }, },
				Edges = Input { Value = 2, },
				Input = Input {
					SourceOp = "Background2",
					Source = "Output",
				},
			},
			ViewInfo = OperatorInfo { Pos = { 651, 123 } },
		},
		AlphaDivide1 = AlphaDivide {
			Inputs = {
				Input = Input {
					SourceOp = "Transform1",
					Source = "Output",
				},
			},
			ViewInfo = OperatorInfo { Pos = { 766, 121 } },
		}
	}
}

That should give you an idea of the behavior to expect.

[SecondMan]

And version 1 i submitted!

Please check if everything is working as you'd expect

Thanks!

[Shem Namo]

Thanks Pieter!!
I try it out asap.

Sorry that version 2 is coming so soon.
I should have asked you to postpone submission.
Sorry

Thanks again,
David

[SecondMan]

No worries

[Shem Namo]

And here it is:
v1.1, now with a Pre-Divide/Post-Multiply control.

@SecondMan, if you have time could you please update it?

Thanks again,
David

com.LearnNowFX.MatchTint.zip

[SecondMan]

Available in Reactor now, thanks!

(I adjusted the date in the atom file for you)

[Shem Namo]

Hi @SecondMan, It's a little late, but I want to thank you for fixing the date in the Atom.

A friend of mine was trying to install this fuse from Reactor, but it didn't show up.
I think that the problem was in the atom and also in the fuse, so I think I fixed the problem.

If you have some time, could you please update the atom?

Thanks again,
David

com.LearnNowFX.MatchTint.zip

[SecondMan]

No problem, you're welcome

The problem seemed to be that previously you had put the Fuse in a Tools folder, rather than a Fuses folder.

The Fuse is in the correct folder now, but you've also changed the Atom Category to Fuses/Color, rather than Tools/Color which doesn't follow convention and is not conform your other tools.

Make the quick change on your end? Just so we're in sync here...

[Shem Namo]

Do you mean that I can have the category in the Tools/Color menu, while the fuse is in the Fuses/Color folder?

Thanks again,
David

[SecondMan]

Err, yes, just like you have done it with all your other tools