[vtkusers] writing image region to a file

[Kevin H. Hobbs]

On Fri, 2006-10-20 at 08:42 +0100, Anja Ende wrote:
> Hi everyone,
> 
> I asked this question a while back and did not get any input. I want
> to write extract part of the image and write it back out. 
> 
> So, what I have are a number of points and I am running a simple
> bezier cubic curve through the them. The curve loops back to itself,
> so it is always a closed curve. What I would like to do is export the
> surface under the curve and I guess the rest of the pixels can just be
> exported with values 0. So, I guess the problem essentially gets
> reduced to taking all the points on the curve and all the points in
> the image and seeing if the image point lies on or inside the curve
> and then export the pixel into the resulting exported image. 

The attached does something similar. The polydata need to be 3D though.


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