[Insight-developers] itk::Image updates

[Bill Lorensen]

Make sure you check the dashboard tomorrow. We MUST HAVE A CLEAN BOARD for the meeting on Thursday.

Thanks,

Bill

At 05:34 PM 11/5/01 -0500, Damion Shelton wrote:
>Wilson and I made the changes to itk::Image discussed earlier (as a temporary solution until a stable TransformBase exists). A few pieces of additional info:
>
>GetIndexToPhysicalTransform and GetPhysicalToIndexTransform are no longer const functions. They now have the ability to create transforms (stored as private members of the class) if none exist when a transform is requested. If a transform pointer exists when the function is called, it is not modified.
>
>TransformPhysicalPointToContinuousIndex and TransformContinuousIndexToPhysicalPoint now rely on cached values of the transforms, rather than recomputing the transform each time. Additionally, I had some problems with the existing version of this function, due to the constructor of AffineTransform being protected (a normal instance of the transform was created rather than ::New() ). This is now resolved, since the transforms are stored as pointers.
>
>We are also thinking of adding the following functions:
>
>TransformPhysicalPointToDiscreteIndex
>TransformDiscreteIndexToPhysicalPoint
>
>which would allow you to use normal indices rather than continuous indices. I am currently truncating continuous indices to obtain normal ones in external code, which tends to look the same every time points are transformed. Any suggestions on whether or not the above two functions would be useful are welcome.
>
>Finally, I did a complete build of all tests and things seem to be fine, but let me know if there are any problems.
>
>-Damion-
>
>
>
>
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