Dear rtk users,
I ran into a small problem with the geometric phantom filter
(rtk::DrawGeometricPhantomImageFilter).
Here comes the description:
Input:
Geometry: Magnification = 1 (virtual detector at the image center)
GeometricFile: [Box] A=50. B=50. C=50. x=0.
y=0. z=0. beta=0 gray=5.
Spacing: 1
Dimension: 150
centered.
Projection stack:
Spacing: 1
Dimension: 1500 (much larger than the projection)
Projector:
CudaForwardProjectionImageFilter (step=0.1)
Problem:
If I connect the output of drawGeometricPhantom filter to the input of the
projector (input 1), the result has non-zero pixels on the projection image
which is not part of the projection.
If I write and read the output drawGeometricPhantom filter to and from the disc
first, the result is correct, i.e. there is nothing but the projection of the
object.
Question:
Can anyone reproduce this? Why is there such a difference?
Best regards,
Louie
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