[Octave-bug-tracker] [bug #56141] [octave forge] (image) bwmorph option 'endpoints' not implemented

[Nicholas Jankowski]

Follow-up Comment #16, bug #56141 (project octave):

I ran a quick script to test 3x3 arrays output in matlab. (fed it 0 to 511
converted to 9-digit binary, reshaped to 3x3, recorded which ones had 1 or 0
in the returned value).

so I could use this output in a manual function fed to makelut to generate a
look-up table that will emulate matlab's endpoints behavior. I'm hesitant to
do it that way because it's more-or-less flying blind without understanding
the ruleset behind the LUT. We wouldn't be able to troubleshoot anything, but
it would guarantee we are compatible with (this version of) matlab. 

Here are the 57 3x3 arrays that produce a '1' from find endpoints:


>> bw_endpoints_true
bw_endpoints_true(:,:,1) =
     0     0     0
     0     1     0
     0     0     0
bw_endpoints_true(:,:,2) =
     0     0     0
     0     1     0
     0     0     1
bw_endpoints_true(:,:,3) =
     0     0     0
     0     1     1
     0     0     0
bw_endpoints_true(:,:,4) =
     0     0     0
     0     1     1
     0     0     1
bw_endpoints_true(:,:,5) =
     0     0     1
     0     1     0
     0     0     0
bw_endpoints_true(:,:,6) =
     0     0     1
     0     1     1
     0     0     0
bw_endpoints_true(:,:,7) =
     0     0     1
     0     1     1
     0     0     1
bw_endpoints_true(:,:,8) =
     0     0     0
     0     1     0
     0     1     0
bw_endpoints_true(:,:,9) =
     0     0     0
     0     1     0
     0     1     1
bw_endpoints_true(:,:,10) =
     0     0     0
     0     1     1
     0     1     1
bw_endpoints_true(:,:,11) =
     0     0     1
     0     1     1
     0     1     1
bw_endpoints_true(:,:,12) =
     0     1     0
     0     1     0
     0     0     0
bw_endpoints_true(:,:,13) =
     0     1     1
     0     1     0
     0     0     0
bw_endpoints_true(:,:,14) =
     0     1     1
     0     1     1
     0     0     0
bw_endpoints_true(:,:,15) =
     0     1     1
     0     1     1
     0     0     1
bw_endpoints_true(:,:,16) =
     0     1     1
     0     1     1
     0     1     1
bw_endpoints_true(:,:,17) =
     0     0     0
     0     1     0
     1     0     0
bw_endpoints_true(:,:,18) =
     0     0     0
     0     1     0
     1     1     0
bw_endpoints_true(:,:,19) =
     0     0     0
     0     1     0
     1     1     1
bw_endpoints_true(:,:,20) =
     0     0     0
     0     1     1
     1     1     1
bw_endpoints_true(:,:,21) =
     0     0     1
     0     1     1
     1     1     1
bw_endpoints_true(:,:,22) =
     0     1     1
     0     1     1
     1     1     1
bw_endpoints_true(:,:,23) =
     0     0     0
     1     1     0
     0     0     0
bw_endpoints_true(:,:,24) =
     0     0     0
     1     1     0
     1     0     0
bw_endpoints_true(:,:,25) =
     0     0     0
     1     1     0
     1     1     0
bw_endpoints_true(:,:,26) =
     0     0     0
     1     1     0
     1     1     1
bw_endpoints_true(:,:,27) =
     0     0     0
     1     1     1
     1     1     1
bw_endpoints_true(:,:,28) =
     0     0     1
     1     1     1
     1     1     1
bw_endpoints_true(:,:,29) =
     0     1     1
     1     1     1
     1     1     1
bw_endpoints_true(:,:,30) =
     1     0     0
     0     1     0
     0     0     0
bw_endpoints_true(:,:,31) =
     1     1     0
     0     1     0
     0     0     0
bw_endpoints_true(:,:,32) =
     1     1     1
     0     1     0
     0     0     0
bw_endpoints_true(:,:,33) =
     1     1     1
     0     1     1
     0     0     0
bw_endpoints_true(:,:,34) =
     1     1     1
     0     1     1
     0     0     1
bw_endpoints_true(:,:,35) =
     1     1     1
     0     1     1
     0     1     1
bw_endpoints_true(:,:,36) =
     1     1     1
     0     1     1
     1     1     1
bw_endpoints_true(:,:,37) =
     1     0     0
     1     1     0
     0     0     0
bw_endpoints_true(:,:,38) =
     1     1     0
     1     1     0
     0     0     0
bw_endpoints_true(:,:,39) =
     1     1     1
     1     1     0
     0     0     0
bw_endpoints_true(:,:,40) =
     1     1     1
     1     1     1
     0     0     0
bw_endpoints_true(:,:,41) =
     1     1     1
     1     1     1
     0     0     1
bw_endpoints_true(:,:,42) =
     1     1     1
     1     1     1
     0     1     1
bw_endpoints_true(:,:,43) =
     1     0     0
     1     1     0
     1     0     0
bw_endpoints_true(:,:,44) =
     1     0     0
     1     1     0
     1     1     0
bw_endpoints_true(:,:,45) =
     1     0     0
     1     1     0
     1     1     1
bw_endpoints_true(:,:,46) =
     1     0     0
     1     1     1
     1     1     1
bw_endpoints_true(:,:,47) =
     1     0     1
     1     1     1
     1     1     1
bw_endpoints_true(:,:,48) =
     1     1     0
     1     1     0
     1     0     0
bw_endpoints_true(:,:,49) =
     1     1     1
     1     1     0
     1     0     0
bw_endpoints_true(:,:,50) =
     1     1     1
     1     1     1
     1     0     0
bw_endpoints_true(:,:,51) =
     1     1     1
     1     1     1
     1     0     1
bw_endpoints_true(:,:,52) =
     1     1     0
     1     1     0
     1     1     0
bw_endpoints_true(:,:,53) =
     1     1     0
     1     1     0
     1     1     1
bw_endpoints_true(:,:,54) =
     1     1     0
     1     1     1
     1     1     1
bw_endpoints_true(:,:,55) =
     1     1     1
     1     1     0
     1     1     0
bw_endpoints_true(:,:,56) =
     1     1     1
     1     1     0
     1     1     1
bw_endpoints_true(:,:,57) =
     1     1     1
     1     1     1
     1     1     0



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