[Insight-users] physical coordinates vs image coordinates

[Luis Ibanez]

Hi Kathy,

The formal way of converting Index coordinates to PhysicalPoint
coordinates is to invoke the following methods from the Image class:

http://www.itk.org/Insight/Doxygen/html/classitk_1_1Image.html

       TransformIndexToPhysicalPoint()
       TransformPhysicalPointToIndex()

You may find useful to look at the code of the itkResampleImageFilter.

The core code in the GenerateData() method performs a similar
task to what you want to do.


   Regards,


      Luis



================================
smythek at u.washington.edu wrote:
> Hi ITK,
> 
> I was wondering if anyone knows of a way I can "snap" physical 
> coordinates (double) to image coordinates (int).  This is why:  I have 
> registered two rather large images and would like to output the 
> composite image.  PasteImageFilter cuts off the double index values 
> since it takes only integer values, and I cannot use an iterator since I 
> can't tell the iterator where to start in the composite image.
> 
> 
> Kathy
> 
> 
> 
> 
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