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  1. pkg load all;@(x)nnz(~imdilate(c=imerode(~x,o=ones(3)),o)-x)+max(bwlabel(c)(:))
  2.  
  3. ans([0,0,1,0,0,0,1,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0;
  4. 0,0,0,0,0,1,1,1,0,0,1,0,0,0,0,0,0,1,0,0,1,0,1,1,0,0,0,0,0,0;
  5. 0,1,0,0,0,0,1,0,0,1,0,1,0,0,1,0,0,1,0,1,1,0,0,0,1,0,1,0,1,0;
  6. 0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,0,0,0;
  7. 0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0;
  8. 0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,1,1,0,1;
  9. 0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,1,1;
  10. 0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0;
  11. 0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0;
  12. 0,0,1,0,0,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,1,0,1,0,0,0,1,0,0,0;
  13. 1,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,1,1;
  14. 0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,1,1,0,1,1,0,0,0,0,1,1,0,0;
  15. 0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,1,0,1,1,0,0,0,1,0,0,0,1,1,0,0;
  16. 0,1,1,1,0,0,0,0,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0;
  17. 0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,1,0,0,0,0,1,0,0,0;
  18. 0,0,1,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0])
Success #stdin #stdout 0.53s 122304KB
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stdin
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Standard input is empty
stdout
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ans =

@(x) nnz (!imdilate (c = imerode (!x, o = ones (3)), o) - x) + max (bwlabel (c) (:))

ans =  187
https://ideone.com/aHoYRo
language:
Octave (octave 4.4.1)
created:
7 years ago
visibility:
public

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