[Insight-users] Curve/Surface representation and operations

[Brecht Heyde]

Hi David,

Thanks for the clarrification, with 3D I indeed meant the extension from a
2D path to a 3D surface instead of just a 3D path.
Are you familiar with operations on the classes you meantioned which would
allow me to perform these operations (per my previous mail):
(1)	Calculate the mean intensity of the image above/below the contour
over a certain distance
(2)	Calculate the (local/mean) curvature of the curve

Siqi Shen already pointed me to use vtkPolyData in combination with the
vtkcurvature class for (2).

Best,
Brecht

-----Original Message-----
From: David Doria [mailto:daviddoria at gmail.com] 
Sent: woensdag 10 augustus 2011 18:13
Cc: Brecht Heyde; insight-users at itk.org
Subject: Re: [Insight-users] Curve/Surface representation and operations

>> I found PolyLineParametricPath as an example, but that is only for two
dimensions (see:
http://www.itk.org/Wiki/ITK/Examples/Curves/PolyLineParametricPath).

PolyLineParametricPath is templated, as is almost everything in ITK.

Simply change

 typedef itk::PolyLineParametricPath< 2 > PathType;

to

 typedef itk::PolyLineParametricPath< 3 > PathType;

to obtain a 3D path.

itkMesh and itkQuadEdgeMesh are ITK's discrete surface
representations. There is also an itkSurfaceSpatialObject, but I never
have good luck with SpatialObject classes.

David