hofig3s8
8-connected boundaries

from morph import *

S=mmbinary([
       [0,0,0,0,0,0,0,0,0],
       [0,0,0,1,1,1,0,0,0],
       [0,0,0,1,1,1,0,0,0],
       [0,1,1,1,1,1,1,1,0],
       [0,1,1,1,1,1,1,1,0],
       [0,1,1,1,1,1,1,1,0],
       [0,0,0,1,1,1,1,1,0],
       [0,0,0,1,1,1,1,1,0],
       [0,0,0,0,0,1,0,0,0],
       [0,0,0,0,0,0,0,0,0]])

DS=mmthreshad(S,0)

Warning: Converting input image from binary uint8 to uint8.
Warning: Converting input image from int32 to uint8.

B0=mmsecross(0)

B4=mmsecross()

B8=mmsebox()

a = mmbshow(DS,S)

b = mmbshow(DS,mmdil(S,B4))

c = mmbshow(DS,mmero(S,B4))

d = mmbshow(DS,mmgradm(S,B4,B0))

e = mmbshow(DS,mmgradm(S,B0,B4))

f = mmbshow(DS,mmgradm(S,B8,B4))

mmshow(a)

mmshow(b)

mmshow(c)

mmshow(d)

mmshow(e)

mmshow(f)