Hi, Yes, you can even if you don't know the geometry in advance. The application rtkinlinefdk and its code rtkinlinefdk.cxx illustrates this. Best regards, Simon
On Thu, Feb 22, 2018 at 2:05 PM, Chao Wu <wucha...@gmail.com> wrote: > Hi Fredrik, If the geometry and projection angles are known in advance, I > think it is possible to perform FDK online. > Regards, Chao > > 2018-02-22 11:11 GMT+01:00 Fredrik Hellman <fredrik.hell...@gmail.com>: > >> Hi, >> >> I am wondering if it is possible to do "online" reconstruction with RTK >> using FDK backprojection, i.e. that you populate the geometry object angle >> by angle and backproject only one or a few projections at a time with the >> geometry object not fully populated initially. >> >> I have seen that the backprojection can be done projection by projection, >> but it seems that the geometry object must be populated with all angles >> before starting. For example in the code for parker weighting, it seems >> that the overscan angle is estimated based on the actual angles in the >> geometry object. Also, computing the angular gap weighting done in the 2D >> weighting depends on adjacent angles. >> >> Best regards, >> Fredrik Hellman >> >> _______________________________________________ >> Rtk-users mailing list >> Rtk-users@public.kitware.com >> https://public.kitware.com/mailman/listinfo/rtk-users >> >> > > _______________________________________________ > Rtk-users mailing list > Rtk-users@public.kitware.com > https://public.kitware.com/mailman/listinfo/rtk-users > >
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