[Insight-users] SpatialObjectToImageFilter

[Julien Jomier]

Hi Yan,

The SpatialObjectToImageFilter is working backward, meaning that it 
iterates through the output image and for each pixel ask the 
SpatialObject if the current pixel is inside the object. So the speed of 
the filter is driven by the size of the output image as well as the 
number of points in the SpatialObjects (for point-based SpatialObjects).

If you have only one line, I would suggest to iterate through your line 
points and project them onto your image.
Can you log a feature request in the BugTracker (www.itk.org/Bug)?

Thanks,

Julien

Yan Yang wrote:
> Hi All,
>  
> I am using itk::SpatialObjectToImageFilter to rasterize a line spatial 
> object into a 3D image with the size 128x128x128, it takes quite a long 
> time to run filter->Update(). Is there any method to accelerate the 
> speed? Is the filtering speed related to the number of points in the 
> spatial object? Any help would be appreciated.
>  
> Thanks,
>  
> Yan
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users