[Octave-bug-tracker] [bug #50071] [octave forge] (image) bwfill(..., 4) in Octave behaves like bwfill(..., 8) in MATLAB and vice versa

[Carnë Draug]

Follow-up Comment #5, bug #50071 (project octave):

The bug is really not that simple, and fixing this should come with a
prominent note on the NEWS file and on the help text.

The issue is that the N value bwfill in Matlab specifies the connectivity of
the foreground but act on the background. This is really not obvious and not
how this type of functions usually work. Octave's implementation specifies the
connectivity of the background and act on the background.

This function has been around since 2002 and such change is very much
backwards incompatible. But I guess the change needs to be done for sake of
Matlab compatibility.

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