[Insight-users] Tr: Problem while testing curves2dextractor application

[Luis Ibanez]

Hi Heyfa,


The curve2d extractor application is setup to
extract curves that are dark in a bright background.


This is because the original motivation for this
application was to find blood vessels in fluoroscopy
X-Ray images, where a contrast agent was injected
in the vasculature.


As an example you can take a look at:

    http://www.itk.org/HTML/Applications.htm

In particular to:

http://www.itk.org/HTML/Curve2DExtraction.htm



At this point, your two options are:


1) Invert the intensities of your images using
    the IntensityWindowingImageFilter or the
    InvertImageFilter

OR

2) Modify the code so that in the parametric space
    you look for regions that are bright, and where
    the eigen values of the hessian are negative.



Hint: Option 1 is *a lot* easier.



   Regards,



       Luis



---------------------------
ammar.heyfa at voila.fr wrote:
> 
> 
> 
> 
> 
>      Hi dear insight-users,
> 
>      > I'm testing the Curve2Dextractor application on some images and
>     the result isn't what I'm waited for. The curves are not well
>     extracted. You'll find in attachement the original image and the 2D
>     curves extracted. Could anyone give me what's wrong, please.
> 
>      > Thanks.
> 
>      > --Heyfa
> 
>      >  
> 
> 
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