Supression LUT

[Thomas Singh]

Peter Doyle mentions suppression LUTs in one of his interviews. Do you know what that is?

[Tom Poole]

I’m guessing he means “constrain” - A film/print emulation LUT that constrains (suppresses) highlights etc.

[Jussi Rovanperä]

What Doyle used on Harry Potter is the kind of spill suppression math compositors use for removing fill created by blue/green screen, but that can be used to remove other unwanted color fill as well.  So the suppression math does a better job than desaturating the unwanted color.

So the contrain LUT is a different thing...

 

 

 

Edited February 8, 2018 by Jussi Rovanperä

[Tom Poole]

15 hours ago, Jussi Rovanperä said:

What Doyle used on Harry Potter is the kind of spill suppression math compositors use for removing fill created by blue/green screen, but that can be used to remove other unwanted color fill as well.  So the suppression math does a better job than desaturating the unwanted color.

So the contrain LUT is a different thing...

 

 

 

Well ok. I didn’t read the article, but that makes sense. 

[Anton Meleshkevich]

On 2/8/2018 at 2:38 PM, Jussi Rovanperä said:

So the suppression math does a better job than desaturating the unwanted color.

 

 

Some kind of 3D LUT Creator AB grid?
I mean, more saturated colors are desaturated, but less saturated colors are untouched or desaturated less.
Or something like this?

Edited February 22, 2018 by Anton Meleshkevich

[Paul Dore]

Peter Doyle used simple math expressions to achieve channel suppression, much like a despill operation (which Jussi was referring to). You can do this in Resolve with LUTs (good) or DCTLs (better). One of my first plugins was called BlueBox, which was based on the process Peter Doyle described in an fxphd interview he did several years ago. An extended version of the plugin, called ChannelBox, is described here:

ChannelBox info

Links to the source files and complied plugin can be found there too.

 

[dermot.shane]

i LURVE blue box (and channel box too)  btw... super awesome tools, used every day that i'm on Resolve

[Orash Rahnema]

11 hours ago, dermot.shane said:

i LURVE blue box (and channel box too)  btw... super awesome tools, used every day that i'm on Resolve

What do you use it for?

I'd love to hear real world example. 

I'm scratching the surface of the Matrix potential and i want to really understand what Can be done

[Dylan R. Hopkin]

I would like to learn more about «entering the matrix» too. (Pun intended of course). A life time ago I did study matrix maths at university, but it’s pretty rusty now.

https://en.m.wikipedia.org/wiki/Matrix_(mathematics)

I suppose having some basic maths will help understanding how color matrices operate.

Edited March 4, 2018 by Dylan R. Hopkin

[Adéyẹmi]

On 3/2/2018 at 5:11 PM, Paul Dore said:

Peter Doyle used simple math expressions to achieve channel suppression, much like a despill operation (which Jussi was referring to). You can do this in Resolve with LUTs (good) or DCTLs (better). One of my first plugins was called BlueBox, which was based on the process Peter Doyle described in an fxphd interview he did several years ago. An extended version of the plugin, called ChannelBox, is described here:

ChannelBox info

Links to the source files and complied plugin can be found there too.

 

Any thoughts on dealing with DR's harsh highlights technically? I am trying to imitate the baselights carefully compressed very soft and soothing highlight roll off. Either by DCTL, or anything. Any tricks, at all? Thanks in advance.

[Luca Di Gioacchino]

There are Fusion tutorials that explain spill suppression (using that max value of two channels to suppress the third).  Search Simon Ubsdell.  He's a Fusion instructor who goes into detail about that.