[Octave-bug-tracker] [bug #46547] image package: canny detector in edge() should use LoG as first step

[Hartmut]

Follow-up Comment #6, bug #46547 (project octave):

(This drives me crazy...)
Could someone please test, if the script of the original bug post gives a
roughly Matlab compatible result, if you do the following change in edge.m?

-      Es = sqrt ( Jx.^2 + Jy.^2 );
+      Es = sqrt ( Jx.^2 + Jy.^2 );
+      Es_max = max(Es(:));
+      if Es_max > 0
+        Es = Es ./ Es_max;
+      endif

(I think I've seen this work fine. But I start mixing up file versions
now...)

This change is ment to be used additionally to the introduction of some kind
of im2double at the beginning of the Canny routine. (see last post)

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