[vtkusers] Finding Boundary

[Shady Shidfar]

----- Forwarded Message ----
From: Shady Shidfar <shady_shidfar at yahoo.com>
To: Brian Gee Chacko <hebrev at gmail.com>
Sent: Tuesday, 9 September, 2008 11:48:32
Subject: Re: [vtkusers] Finding Boundary


Well the problem is that I'm using a region growing method to find the regions. So the pixels in each region won't be having predictable values. I guess I need to know the values if I want to draw a contour, using vtkContourFilter. I guess vtkExtractEdges or vtkEdgePoints might be useful, but I'm not successful with getting them to work yet. I was hoping someone might come up with an idea :-/

Thanks
Shaadi 



----- Original Message ----
From: Brian Gee Chacko <hebrev at gmail.com>
To: Shady Shidfar <shady_shidfar at yahoo.com>
Cc: vtkusers at vtk.org
Sent: Monday, 8 September, 2008 16:33:29
Subject: Re: [vtkusers] Finding Boundary


Hi, Shaadi

as you have mentioned contouring.....You can get the points from the data output of a vtkContourFilter (provided you have contoured it well enough to get the boundary dataset). 

Regards
Brian


On Mon, Sep 8, 2008 at 6:40 PM, Shady Shidfar <shady_shidfar at yahoo.com> wrote:

Can someone please tell me how I can find the boundary points of a selection of points. I have regions consisting of pixels or points and I want to draw a contour around them. I'm thinking of finding the border points and later on attaching them. 


Thanks 
Shaadi


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-- 
Brian Gee Chacko
Software Engineer
VCreate Logic Pvt. Ltd.
Bangalore, Karnataka, India
www.vcreatelogic.com


      
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