[Insight-users] distance map filters.., writing filters

[Kalpathi Subramanian]

I am already giving it a binary image (background is 0 and object
is white).. what I would like are distances computed only for
the white voxels. As you might know,  in many instances the number
of object voxels is a lot smaller compared to the total number of 
voxels. Thus, the distance computation will run a lot faster.

In other words,  I dont need the distances from the background voxels
in my application.

Thanks.

	-- krs



Karthik Krishnan wrote:
> If you give the DanielssonDistanceMap filter a binary image, its going 
> to calculate distances to the boundaries of that binary image .
> 
> So what you are looking for is probably a filter that classifies/ 
> binarizes your input image into object pixels and non-object pixels ?
> 
> Kalpathi Subramanian wrote:
> 
>>
>> Is there a way to restrict the computation of the distance
>> map to, say, "object pixels"? I am using the Danielsson filter..
>> Seems like its not possible from looking at the docs.
>>
>> Otherwise, I was considering developing a filter. Are there
>> any guidelines on how to go about building  a new  filter that
>> I can plug into the pipeline?
>>
>>     -- krs
>>

-- 
K.R.Subramanian                        Phone: (704) 687-8579
Department of Computer Science         FAX:   (704) 687-3516
UNC Charlotte, STech 435E              Email: krs at uncc.edu
Charlotte, NC 28223-0001               Web: http://www.cs.uncc.edu/~krs