Image sampler specific radius and specific custom preview.

hi to all!

im fairly new to grasshopper, i started using it two weeks ago :)

so what im trying to achieve is a perforated facade with a fixed radius on the perforations given by a gray scale image.

i have managed to obtain the circles on the surface but im having trouble to remap the values given by the image sampler to various fixed radius simply because i cant seem to understand how remap works. :(

then each circle type should display a different color to export to autocad and laser cut. each individual panel.

any suggestions ?