How to separate an image into multiple layers based on color

[jpummill]

Hi Everyone,

First post.

I would like to know if there is a way to separate an image into multiple layers based on color (or pallet)?

I have created an image with Filter -> Render -> Clouds -> Difference Clouds

   

Then I apply the Color -> Posterize effect to make the image look like a terrain map

   

Now I would like to automatically split each color into its own layer (so this image should be about 8 or 9 layers).

Any suggestions would be most appreciated!!!

Thank you,
jpummill