Another try, this time using luminosity masks in Photoflow,
enfused_CRW_3008-3012-cw05sw06.pfi (113.1 KB)
I did almost the same workflow as @Carmelo_DrRaw above, but on the final step I decided to use a modified version of luminosity masks in PF: instead of three luminosity masks, I used nine (like L, LL, LLL, M, …)