What is the magnification factor of your geometry? 2016-06-27 23:56 GMT+02:00 Solomon Tang <[email protected]>:
> Hi Simon, > > I am using RTK to simulate CT acquisitions using different detector sizes > to see how this impact on image quality might change some of our in-house > metrics. > > The images I have linked to below have been created using > rtkforwardprojections with different projection spacings (0.3 isometric and > 0.75 isometric) reconstructed with rtkfdk with the same pixel spacing and > image dimensions (0.4688x0.4688x0.6 | 512x512x225). The CUDA projection > stepsize is equal to the projection spacing. The window levels between > images of their respective rows are the same. > > I am simply wondering if the differences between these images are > realistic. I would expect the image with a detector size than is more than > twice as large as the original would be drastically different when in fact > they turn out to be incredibly similar. Are the assumptions made about > projection spacing == cuda stepsize == simulated hardware detector size > incorrect? > > <http://goog_1486088111> > https://gyazo.com/e86436826f687a2db4b234699d050450 > > https://gyazo.com/ca9612218f082e78ba3082950a27fa4c > > Solomon > > _______________________________________________ > Rtk-users mailing list > [email protected] > http://public.kitware.com/mailman/listinfo/rtk-users > >
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