04-26-2020, 11:04 PM
If the colors can be separated by their luminosities (or this is a grayscale image) then:
* Add a layer mask to the image, and initialize to Grayscale copy of layer
* Make as many copies of this as you want images
* Use the threshold tool on the mask to keep opaque only the range of values for the image (the threshold tool has two handles and defines a range).
In the example below, since the spectrum of the solid noise is a bit restricted, I used wider ranges at both ends
* Add a layer mask to the image, and initialize to Grayscale copy of layer
* Make as many copies of this as you want images
* Use the threshold tool on the mask to keep opaque only the range of values for the image (the threshold tool has two handles and defines a range).
In the example below, since the spectrum of the solid noise is a bit restricted, I used wider ranges at both ends