[Insight-users] Exact boundary obtained by the approximate boundary

[Luis Ibanez]

Hi Superzz

A) Do you need to mark the pixels of the object boundary ?

or

B) Do you need to find locations of points in the boundary ?


If what you need is (A) then you could use the
CannyEdgeDetection filter.
http://www.itk.org/Doxygen/html/classitk_1_1CannyEdgeDetectionImageFilter.html

See the example in

Insight/Examples/Filtering/CannyEdgeDetectionImageFilter.cxx


If what you need is (B) you may want to consider
Model-to-Image registration as described in the
example:

Insight/Examples/Registration/
        ModelToImageRegistration1.cxx
        ModelToImageRegistration2.cxx


   Regards,


          Luis


-------------------------------------------------------------------------------
On Sat, Apr 24, 2010 at 12:48 AM, superzz <jxdw_zlf at yahoo.com.cn> wrote:

>
> Hello
> I have an approximate round object in picture. I can use hough circle to
> determine the circle object center and radius. The hough circle result is
> its approximate boundary. I want to use hough circle result as inital
> result, and use some algorithm to obtain the exact boundary. What algorithm
> I should use?
>
> Thanks
>
> superZZ
> --
> View this message in context:
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