Is it possible to select a colour by providing HSL or RGB parameters?

[Affinity Rat]

I’m trying to create a way of removing all colours but black from a group of files, is there a way to automate this? My original thot was a script, but no way to run in batch mode, at least that I know of.

Any ideas?

I was wanting to create a macro to select black on an image, invert the selection then delete leaving only black, but first how to select black without clicking on part of image? Then how to apply in batch?

 

 

[walt.farrell]

Just to confirm: Are you talking about Black in Pixel layers, or in vector objects?

[Affinity Rat]

Black in pixels.

Clicking on black with a 23% tolerance works, but how to determine where to click in a script.

• Anyway to assign a black area to all images then click there to make selection?
• Invert, delete coloured areas
• Then crop black area added in.

[carl123]

28 minutes ago, Affinity Rat said:

Clicking on black with a 23% tolerance works, but how to determine where to click in a script.

If you record a macro using the tolerance you want (23%) when you replay that macro it should select the same colour & tolerance you used to record it

(I think)

[David in Яuislip]

Set blend ranges in a macro, try this one, should work in a new batch job

BlackOnly.afmacro

[Affinity Rat]

@David in Яuislip 

Thank you for that, but it erased a large part of the image, but the technique does have potential. Looking at the “black” is black but rather

RGB (1,0,2) or HSL (270,100,0)

 

 

[Affinity Rat]

39 minutes ago, carl123 said:

If you record a macro using the tolerance you want (23%) when you replay that macro it should select the same colour & tolerance you used to record it

(I think)

Thanks Carl123

The problem is where to select, the macro must know where to click, all images are different.

[walt.farrell]

18 minutes ago, Affinity Rat said:

The problem is where to select, the macro must know where to click, all images are different.

Carl is saying that the color and tolerance you used for the recording will be applied when you replay the macro. The macro won't be clicking, but selecting using the parameters you used originally.

(I have not tried this.)

[Affinity Rat]

Ok thanks Walt for the clarification. 🙂

 

[Affinity Rat]

@carl123 Thank you very much yes that does work.