Canny edge detection and close contours

Is it a definite must for Canny edge detection to produce an image
with closed contours? I found a C++ source code on the net that
produces an edge image one pixel thick with few gaps here and there,
and my colleague said that it shouldn't. I could go ahead and ignore
her view and move on with my project because I do not anticipate major
problems for my goal, but I am curious is it really a necessary
feature? If it is so, could somebody point a C++ source code on the
web for Canny that they know and trust ? I don't want any family of
libraries of the OpenCV sort etc.

Many thanks.

.

Relevant Pages

  • Re: Canny edge detection and close contours
    ... I don't think you're guaranteed of getting closed contours. ... and my colleague said that it shouldn't. ... her view and move on with my project because I do not anticipate major ... could somebody point a C++ source code on the ...
    (sci.image.processing)
  • Re: Canny edge detection and close contours
    ... produces an edge image one pixel thick with few gaps here and there, ... could somebody point a C++ source code on the ... If you want closed contours why not try using active contours. ...
    (sci.image.processing)