[ITK-users] [ITK] location of point in FloodFilledSpatialFunctionConditionalConstIterator

[Matt McCormick]

Hi Matthew,

Could the ellipsoid code be place in a self-contained, small test that
we could use to verify and possible correct the behavior?

Thanks,
Matt

On Mon, Apr 14, 2014 at 1:02 PM, matthew <mrrm at web.de> wrote:
> Hi Matt,
>
> I am not sure, but the following code seems to be suspicious.
> To my mind, the origin case is the actual center case.
> The origin case is similar to the center case, but the offset needs to be
> subrtacted.
> I haven't looked at the rest.
>
> I was using it with an ellipsoid inside-outside-function, and the ellipsoids
> were all shifted by 0.5 along each dimension.
>
> ...
> switch ( m_InclusionStrategy )
>     {
>     // Origin
>     case 0:
>       {
>       // Get the physical location of this index
>       this->m_Image->TransformIndexToPhysicalPoint(index, position);
>
>       // Evaluate the function at this point
>       return this->GetFunction()->Evaluate(position);
>       }
>       break;
>
>     // Center
>     case 1:
>       {
>       // The center of the pixel is the index provided in the function
>       // call converted to a continuous index with an offset of 0.5
>       // along each dimension
>       ContinuousIndex< double, TImage::ImageDimension > contIndex;
>
>       for ( unsigned int i = 0; i < TImage::ImageDimension; i++ )
>         {
>         contIndex[i] = (double)index[i] + 0.5;
>         }
>
>       // Get the physical location of this index
>       this->m_Image->TransformContinuousIndexToPhysicalPoint(contIndex,
> position);
>
>       // Evaluate the function at this point
>       return this->GetFunction()->Evaluate(position);
> ...
>
>
>
>
>
> --
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