Hi,
I wonder if I found a bug in the WriteByITK() method of the mitk::ImageWriter
class regarding spacing and origin for 4 dimensional (3d+t) data. Could someone
please check and verify this?
I tried to save some 3d+t data to .nrrd format and found some weird "space
directions" and "space origin" information in the output file.
In mitk::ImageWriter::WriteByITK(...) there is a for-loop setting spacing and
origin information for each dimension to the itk image IO object:
[...]
for(unsigned int i=0; i<dimension; i++)
{
imageIO->SetDimensions(i,dimensions[i]);
imageIO->SetSpacing(i,spacing[i]);
imageIO->SetOrigin(i,origin[i]);
[...]
}
The attributes "spacing" and "origin" are mitk::Vector3D and mitk::Point3D
objects. If dimension is 4 (as in my case) the loop addresses spacing[3] and
origin[3] which are not defined, producing corrupt spacing and origin
information.
A somehow related bug is filed in the bug tracker: "NRRD format does not save
4D images" (Bug 8211). But it is closed and marked as "resolved fixed"...
Best regards,
Andreas
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