Today, 06:48 AM
Looking at your example, it seems impossible to isolate different shades. Many dots have been placed on top of each other, creating various color gradations (dark - light). Actually, this example should consist of multiple layers, but you want to convert this type of image into layers. It is a bit like merging different layers with different images in, for example, GIMP and saving the result as a JPG/PNG file. You cannot then convert this file back to the original layers. You would actually need a 3D image of the dots, or the dots in separate images/layers. In my opinion, there is no solution to your question.