[Insight-users] Re: 2D boundary tracking

[Zachary Pincus]

There should be relatively little itk-specific code in the actual  
implementation. Some basic index types and iterators but nothing  
more. The itk::PolyLineParametricPath objects can just be substituted  
for std::vectors, or some even simpler type. Not a lot of work, really.

The code will return open contours if they intersect the image edge,  
and closed contours if they do not. This can be pretty easily  
modified as well.

Zach Pincus


> Thanks! I implemented a naive 2D bdry tracking algorithm
> a while back, which starts at a boundary point, and keeps moving
> along the boundary until it gets back at the starting point.
> Yes, I'm assuming the "object" is entirely in the interior of
> the image. Every time I run it on new examples I run into trouble
> and discover a new bug (not really bugs, but rather situations I
> had not anticipated), which made me realize it's not as trivial
> as I first thought.
>
> Good to have an implementation of real algorithm. You wouldn't
> happen to have a non itk implementation, would you? I'm using
> this outside itk and it's not exactly easy to merge itk code into
> my own.
>
>
>
>
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