Blob pattern ID

Hello , can you guys give a hand with this ?

I,m trying to get ID from a group of blobs which are a group of IR leds always place in the same manner , so i,m trying to get and x and y from every group , the thing is that i dont get the way i should compare each blob to select the right ones . regards ;D

groups_blobs_ID.v4p (25.2 kB)