Howto make after color separation each color an individual layer?

[Reinhard80]

[Hangman]

@Reinhard80, welcome to the forums...

Are you wanting to make RGB or CMYK colour separations or are you talking about a separation for each and every colour that appears in the image, e.g.,, the yellow, black, pink etc?

[Reinhard80]

Thanks for your reply. Either CMYK or RGB would be fine. 

[Reinhard80]

Sorry posted too quickly. What I teally need is to see where identical colours are on the image. If I converted to b&w and posterised it, sometimes the values are difficult to make out. Thanks

[Hangman]

There are numerous ways to create RGB separations, one of the simplist ways is shown here... The same applies if you have a CMYK file, just replace the layers accordingly with their CMYK equivalents...

I don't know if this gives you what you're looking for, if not let us know what it is you are looking to achieve by generating the separations so we can better advise...

[Reinhard80]

Thank you so very much. I hope I dońt abuse your generosity. Is there a similar way to separate color by color as seen in the imaga? Pink for pink, black for black, etc. I‘m hoping that this possible. Thx again,

Reinhard

[NotMyFault]

This might help

 

[NotMyFault]

On 2/20/2023 at 8:51 PM, Reinhard80 said:

Sorry posted too quickly. What I teally need is to see where identical colours are on the image. If I converted to b&w and posterised it, sometimes the values are difficult to make out. Thanks

The hue live mask may help to identify „identical colors“. But it depends on how you define „identical“.

• Identical RGB values / identical HSL values?
• same hue, any saturation and lightness?
• same hue and saturation, any lightness?
• a range from … to ?

[Hangman]

@NotMyFault, that’s as per the original post and will only show either CMYK or RGB seps rather than specific colours as  @Reinhard80 is looking for…

[fde101]

You can do this on a color-by-color basis:

• Select -> Select Sampled Color...
• Click the color you want to copy into a new layer
• Apply
• Layer -> Duplicate Selection
• Repeat for additional colors

[loukash]

4 hours ago, Reinhard80 said:

way to separate color by color as seen in the imaga? Pink for pink, black for black, etc.

First you may want to separate the posterized image into R, G and B layers, so that you have better overview:

1. make three copies of the posterized pixel layer
2. open the Channels panel
3. in Layers panel, select the pixel layer that will keep Red
4. ctrl/right-click on the Green and Blue channels (not the "composite" but the other section below) and select Clear
5. for the Green layer, clear Red and Blue channels
6. for the Blue layer, clear Red and Green
7. (if you set the top two layers to Screen blend mode, you'll get your RGB composite back)

Then, you may want to proceed with:

3 hours ago, fde101 said:

Select Sampled Color

… each channel one by one. Each layer will now have as many shades as your initial Posterize adjustment levels.

And I guess this all can be largely automated by a macro. (I'm no Macro Jedi though, sorry…)

[loukash]

Something like this, with R already separated into the 4 Posterize levels:

[NotMyFault]

8 hours ago, Hangman said:

@NotMyFault, that’s as per the original post and will only show either CMYK or RGB seps rather than specific colours as  @Reinhard80 is looking for…

If combined with live hue mask you can separate any color.

But it depends on how do you define color. The live hue mask will separate based on hue only, saturation information will be lost during separation, and lightness may change as you remove lightness participation of filtered out colors.

So we really need the intention how the extracts will be used.