Closed AnderBiguri closed 3 years ago
I think it is there for keeping the back-projection of unity matrix (Vs) does not have zeros. Offset may make this logic fail, hence the artefacts. Should check if geox has correct settings.
@yliu88au thanks for the clarification!
I see and that makes sense. I think the better solution is perhaps to increase the size of the detector, instead of shirking the image size. I think that should be enough to make sure there are no zeros, while maintaining the correct pixel value in the V matrix.
nah, that does work to remove zeroes, but does not work with offsets.
Seems that the easy solution was to simply +0.000001 to V with standard geo.
the 0.9 multiplier in computeV creates ring artifacts in detector offset recons.
Why is that there? I forgot.