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[Octave-patch-tracker] [patch #8812] Added imquantize to image toolset

From: Guy B
Subject: [Octave-patch-tracker] [patch #8812] Added imquantize to image toolset
Date: Wed, 02 Dec 2015 20:23:54 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36

Follow-up Comment #9, patch #8812 (project octave):

It does seem to work for the special case in which you only want to label
regions and not assign them costume values.

But it shouldn't work according to the documentation... in fact, I can't see
how the documentation on this function is correct.

Did I miss anything? 

>From help lookup:

If table is increasing and 'idx = lookup (table, y)', then
     'table(idx(i)) <= y(i) < table(idx(i+1))' for all 'y(i)' within the
     table.  If 'y(i) < table(1)' then 'idx(i)' is 0.  If 'y(i) >=
     table(end)' or 'isnan (y(i))' then 'idx(i)' is 'n'.

     If the table is decreasing, then the tests are reversed.  For
     non-strictly monotonic tables, empty intervals are always skipped.
     The result is undefined if TABLE is not monotonic, or if TABLE
     contains a NaN.

     The complexity of the lookup is O(M*log(N)) where N is the size of
     TABLE and M is the size of Y.  In the special case when Y is also
     sorted, the complexity is O(min(M*log(N),M+N)).


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