[Octave-bug-tracker] [bug #46099] image package: edge(I, 'canny') gives very bad quality results

[Hartmut]

Follow-up Comment #14, bug #46099 (project octave):

Here is a new PATCH for this bug:
* This patch includes two new TESTs for the Canny edge detection method. Those
tests will fail if my current patch of bug #45568 is NOT applied before
(because then all results will be shifted downwards and to the right by one
pixel).
* This patch (identically) includes my previous patch in this bug report,
concerning the edge DIRECTION calculation in nonmax_supress.cc
* This patch should make the "Canny" method of edge.m mostly Matlab
COMPATIBLE. (There will only be slight differences when using automatic
threshold computation, because this seems to be extraordinary fancy in
Matlab...)

This patch might also fix the issue in bug #46547. (I wasn't able to test this
any more.)

Please give me feedback if this patch works as I assume. (And don't forget to
apply the patch of bug #45568 beforehand...)



(file #35650)
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Additional Item Attachment:

File name: edge_canny_direction+compatibility.patch Size:5 KB


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