<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN style="COLOR: black"><FONT size=2><FONT face="arial, helvetica, sans-serif">Hi Luis,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN style="COLOR: black"><FONT size=2><FONT face="arial, helvetica, sans-serif">A one more question to clear completely my understanding.<o:p></o:p></FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"><FONT face="arial, helvetica, sans-serif">You said that “The Level Set implementations of deformable models have all<BR>the "LevelSet" string as part of their name” . Does this means that there is no </FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"><FONT face="arial, helvetica, sans-serif">level set (purely level set without active contour) based segmentation?</FONT></SPAN><SPAN style="COLOR: black"><FONT size=2><FONT face="arial, helvetica, sans-serif"> <BR>Thank you for your time<o:p></o:p></FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN style="COLOR: black"><FONT face="arial, helvetica, sans-serif" size=2>Juliette</FONT> <o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p> </o:p></P></DIV>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif"><BR>
<DIV style="FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face=Tahoma size=2>
<HR SIZE=1>
<B><SPAN style="FONT-WEIGHT: bold">De :</SPAN></B> Luis Ibanez <luis.ibanez@kitware.com><BR><B><SPAN style="FONT-WEIGHT: bold">À :</SPAN></B> Juliette Deniau <juliette.deniau@yahoo.fr><BR><B><SPAN style="FONT-WEIGHT: bold">Cc :</SPAN></B> insight-users@itk.org<BR><B><SPAN style="FONT-WEIGHT: bold">Envoyé le :</SPAN></B> Mardi, 2 Décembre 2008, 21h04mn 06s<BR><B><SPAN style="FONT-WEIGHT: bold">Objet :</SPAN></B> Re: [Insight-users] active contour, snake, deformable model and level set segmentation ???<BR></FONT><BR><BR>Hi Juliette,<BR><BR><BR>Your observations are correct.<BR><BR>If you are looking for a mesh-based implementation of a deformable model, then you should look at<BR><A href="http://www.itk.org/Insight/Doxygen/html/classitk_1_1DeformableSimplexMesh3DBalloonForceFilter.html" target=_blank>http://www.itk.org/Insight/Doxygen/html/classitk_1_1DeformableSimplexMesh3DBalloonForceFilter.html</A><BR><BR><BR>and its example
application in<BR><BR> InsightApplications/DeformableModelSimplexMesh<BR><BR><BR>This is closer to what is known as "Snakes" in the medical field.<BR><BR>The Level Set implementations of deformable models have all<BR>the "LevelSet" string as part of their name.<BR><BR><BR>They will be:<BR><BR><BR>$ find . -name
"*LevelSetImageFilter.h"<BR>./itkAnisotropicFourthOrderLevelSetImageFilter..h<BR>./itkCannySegmentationLevelSetImageFilter.h<BR>./itkCurvesLevelSetImageFilter.h<BR>./itkGeodesicActiveContourLevelSetImageFilter.h<BR>./itkGeodesicActiveContourShapePriorLevelSetImageFilter.h<BR>./itkIsotropicFourthOrderLevelSetImageFilter.h<BR>./itkLaplacianSegmentationLevelSetImageFilter.h<BR>./itkNarrowBandCurvesLevelSetImageFilter.h<BR>./itkNarrowBandLevelSetImageFilter.h<BR>./itkNarrowBandThresholdSegmentationLevelSetImageFilter.h<BR>./itkSegmentationLevelSetImageFilter.h<BR>./itkShapeDetectionLevelSetImageFilter.h<BR>./itkShapePriorSegmentationLevelSetImageFilter.h<BR>./itkThresholdSegmentationLevelSetImageFilter.h<BR>./itkUnsharpMaskLevelSetImageFilter.h<BR>./itkVectorThresholdSegmentationLevelSetImageFilter.h<BR><BR><BR><BR>Please let us know if you have further questions,<BR><BR><BR> Thanks<BR><BR><BR>
Luis<BR><BR><BR><BR>------------------------<BR>Juliette Deniau wrote:<BR>> Hi All,<BR>> <BR>> I’m confused about what type of segmentation methods are within itk, in particular the ones related to active contour and level set?<BR>> <BR>> In my understanding, active contour is the same as a deformable model and the same as a snake. The levelset segmentation is another type (use a PDE to evolve the curve).<BR>> <BR>> In itk there are some active contours implemented with the level set framework like the CurvesLevelSetImageFilter, I’m alright?<BR>> <BR>> Can any one tell me what are the segmentation filters which are purely active contour (snake) and those which use level set to evolve the curve? <BR>> Sorry if my question is too stupid!<BR>> <BR>> Thanks a lot<BR>> <BR>> Juliette<BR>> <BR>> <BR>> <BR>> ------------------------------------------------------------------------<BR>> <BR>>
_______________________________________________<BR>> Insight-users mailing list<BR>> <A href="mailto:Insight-users@itk.org" ymailto="mailto:Insight-users@itk.org">Insight-users@itk.org</A><BR>> <A href="http://www.itk.org/mailman/listinfo/insight-users" target=_blank>http://www.itk..org/mailman/listinfo/insight-users</A><BR></DIV></DIV></div><br>
</body></html>