[Insight-users] DanielssonDistanceMapFilter

[Zachary Pincus]

The documentation for this filter specifies the meaning of the  
outputs. It is available in the filter's header file, or online:  
http://www.itk.org/Doxygen/html/ 
classitk_1_1DanielssonDistanceMapImageFilter.html (This is part of  
the ITK's doxygen-generated documentation here: http://www.itk.org/ 
Doxygen/html/classes.html )

The documentation states:
> The filter will produce as output the following images:
>
> - A voronoi partition using the same numeric codes as the input.
>
> - A distance map with the approximation to the euclidean distance.  
> from a particular pixel to the nearest object to this pixel in the  
> input image.
>
> - A vector map containing the component of the vector relating the  
> current pixel with the closest point of the closest object to this  
> pixel. Given that the components of the distance are computed in  
> "pixels", the vector is represented by an itk::Offset. That is,  
> physical coordinates are not used.
So the vector map contains offsets which associate each point in the  
output image with the closest point on the object boundary.

Zach Pincus

Program in Biomedical Informatics and Department of Biochemistry
Stanford University School of Medicine



On Dec 3, 2005, at 3:41 PM, Sonali Barua wrote:

> Hello,
>
> What does the third output  the Vector Map  of the
> DanielssonDistanceMapImageFilter store? Of what is the vector map? and
> what is it's significance.
>
> Sincerely,
>
> Sonali Barua.
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