[Rtk-users] rtkReg23ProjectionGeometry

[Simon Rit]

Hi,
Wrong assumption. It's the coordinate of point (0,0) in the coordinate 
of the projection image in the word coordinates, it's not the coordinate 
of the center of the first pixel. This is mentioned in the geometry 
description file <http://www.openrtk.org/Doxygen/geometry.pdf> on the wiki.
You should not change the mhd parameters. If you want to account for 
offset parameters that change from projection to projection, you can put 
that offset in the computation of the detector position in world 
coordinates.
Simon

On 13/01/2016 13:42, Shiras Abdurahman wrote:
> Dear all,
>
> I am trying to generate geometry xml file with 
> rtkReg23ProjectionGeometry after decomposing projection matrix. One of 
> the argument to the function AddReg23Projection is detector position. 
> I assume that, it is the position vector of the center of the first 
> pixel in world co-ordinates. This will be used for computing the 
> projection offset parameters by projecting detector origin vector onto 
> the u and v axis of the detector. If that is the case, do we need to 
> change the offset parameters of each projection in the mhd file. Will 
> this create problems during displaced detector correction?
>
>
> With regards,
> Shiras
>
>
>
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