[Rtk-users] How to make the comparison?

[Chao Wu]

Hi Guangming,

If you half the spacing you need twice the dimension (in length, or 8 times
in volume) to cover the same area, i.e. --spacing 1 --dimension 512.
Is this what you want?

Regards,
Chao

2015-05-10 22:50 GMT+02:00 Guangming Zang <guangming.zang at kaust.edu.sa>:

> Hi all.
> I have implemented SART algorithm with some optimizations.and i wanna to
> make a comparison with the implementations in our RTK.
> My questions are:
> 1. how to use RTK to  generate the initial  volume(i.e., ground Truth )to
> make the comparison?
> 2. My answer to the question 1 is that maybe i can use rtkdrawgeometricphantom
> to generate a reference volume. However,
> I noticed that in  the ADMMTV example in RTK wiki page,
> <http://wiki.openrtk.org/index.php/RTK/Examples/ADMMTVReconstruction>
> when i use the default demand, it works well (both for rtkadmmtotalvariation
> and rtkdrawgeometricphantom)
> . But when i change the spacing from 2 to 1, and dimension as 128.
> i.e. the commands
> from
> rtkdrawgeometricphantom --spacing 2 --dimension 256--phantomfile
> SheppLogan.txt -o ref.mha
> to
>
> rtkdrawgeometricphantom --spacing 1 --dimension 128 --phantomfile SheppLogan.txt -o ref.mha
>
> the volume's visualization(ref.mha) is wired .
>
> So can you help me to find what's going on or tell me a better way to make the comparison between RTK method and my implementations.
>
>
> Thanks in advance and with my best regards
>
> Guangming
>
>
> *Guangming Zang (Alex)*
> *King Abdullah University of Science and Technology(KAUST)*
> *University of Chinese Academy of Sciences(UCAS)*
>
>
>
>
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