[Rtk-users] Forward Projection Geometry

[Simon Rit]

Hi,
The geometry object does the link between the 3D image and the projections.
The 3D image (second input for the forward filter) may be oriented by
setting the ImageDirection (e.g., via the OrientImageFilter). The best I
guess is to play around with it to feel what changing the input orientation
does.
Any source and detector positions / detector orientation can be described
with the geometry so you can chose what you'd like to do. You might find it
easier to use rtk::Reg23ProjectionGeometry::AddReg23Projection to add
projections, then you need to provide 3D positions of the source and the
detector and two 3D vectors for the detector orientation.
I hope this helps. Best regards,
Simon

On Sat, Jul 9, 2016 at 8:46 PM, Yu Zhang <yuzhang at echopixeltech.com> wrote:

> Hi, I am a new user of RTK, and I want to use the ForwardProjectionFilters.
> I would like to ask Mr. Simon Rit some questions about
> rtk::ThreeDCircularProjectionGeometry class.
> How to change the input itkImage orientation using the same geometry input?
> The itkOrientImageFilter seems to have no impact on output images.
> Could the AddProjection function parameters correspond to RAO or RAU
> values?
> Best regards,
> Yu Zhang
>
>
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