pbmclean: 0 0 0 0
pbmlife: 0 0 0 0
pbmmask: 0 0 0 0
pbmminkowski: 0 0 0 0
pbmtoepsi: 0 0 0 0
pbmtopsg3: 0 0 0 0
pbmpscale 1 : 0 0 0 0
pbmreduce -threshold 2 : 0 0 0 0
pbmtopgm 2 2 : 0 0 0 0