Split jointed bee pollens

I believe this is a difficult problem...I want to split 2 or more jointed bee pollens....I n the upper right area

i use this code

function cluster_splited=clustering(cluster_binary);

se = strel('sphere',10);
 cluster_splited0=imerode(cluster_binary,se);
 cluster_splited1=imclose(cluster_splited0,se);
 cluster_splited2=imclose(cluster_splited1,se);
 cluster_splited=imclose(cluster_splited2,se);
end

but the result is this

it doesnt split the cluster...How could i do it ??I want to split in the middle of the cluster and segment 2 pollens...