[Rtk-users] Python Wrapping

[Cyril Mory]

Hi Johnson,

Regarding the iterative methods:
- In SART, you can use the CUDA forward and back projectors, but the 
rest of the calculation is performed on CPU. We do not use SART a lot, 
so we have not fully optimized it.
- Conjugate gradient, on the other hand, is entirely performed on the 
GPU. Note that a regularized conjugate gradient reconstruction filter is 
also available (with total variation denoising, wavelets denoising, and 
positivity enforcement)

I hope you will find what you need,
Regards,
Cyril

On 03/17/2016 08:54 PM, Johnson Keiriz wrote:
>
> Hello,
>
> I did rebuild and now things are working. I tested reconstruction with 
> and without the filtering and there were differences. Though, I am not 
> sure that filtering have provided a better reconstruction.
>
> I want to experiment the iterative methods. Can you please confirm for 
> me which iterative method are fully implemented in CUDA: is it the 
> conjugate gradient or SART ?
>
> I have noticed that they are not wrapped at all, any guide on how to 
> introduce new filters?
>
> Once I have tested my wrapping, I will submit a github pull-request.
>
> Thanks,
>
> Johnson
>
> *From:*simon.rit at gmail.com [mailto:simon.rit at gmail.com] *On Behalf Of 
> *Simon Rit
> *Sent:* Thursday, March 17, 2016 1:54 PM
> *To:* Johnson Keiriz
> *Cc:* rtk-users at public.kitware.com
> *Subject:* Re: [Rtk-users] Python Wrapping
>
> Hi,
>
> Good! Indeed, many things are not wrapped. There is a trick regarding 
> modifications of the wrappings. You need to either start from scratch 
> the compilation or delete the file 
> SimpleRTK-prefix/src/SimpleRTK-stamp/SimpleRTK-configure. This will 
> trigger a reconfiguration of the SimpleRTK and, hopefully, account for 
> your modifications.
>
> Don't hesitate to submit a github pull-request when you have something 
> working.
>
> Simon
>
> On Thu, Mar 17, 2016 at 4:33 PM, Johnson Keiriz 
> <jkeiriz at theobjects.com <mailto:jkeiriz at theobjects.com>> wrote:
>
> Hello again,
>
> I found out about the json wrapping files. I added the wrapping for 
> all the filters, but I haven’t noticed any effect from setting the 
> filters !!!
>
> Any hints ?
>
> Regards,
>
> Johnson
>
> *From:*Rtk-users [mailto:rtk-users-bounces at public.kitware.com 
> <mailto:rtk-users-bounces at public.kitware.com>] *On Behalf Of *Johnson 
> Keiriz
> *Sent:* Thursday, March 17, 2016 9:23 AM
> *To:* rtk-users at public.kitware.com 
> <mailto:rtk-users at public.kitware.com>; Simon Rit
> *Subject:* [Rtk-users] Python Wrapping
>
> Hello,
>
> I am using the Python wrapped version of RTK. I have a question 
> regarding the wrapping:
>
> It seems that not all functionality is available, for example: for the 
> *CudaFDKConeBeamReconstructionFilter, *I was not able to set the cut 
> frequency of the any of the filters
>
> (RamLaK, Cosine, ShepLogan) except for the Hann . Are the methods not 
> wrapped ?
>
> Thanks,
>
> Johnson
>
> *Description: cid:image002.jpg at 01CB5984.4EABACE0*
>
> 	
>
> *Johnson Keiriz, PhD
> Senior Software Engineer*
>
> 760 St-Paul W, #101
> Montreal, QC
> Canada  H3C 1M4
> tel: (514) 843-3861 <tel:%28514%29%20843-3861>
> ext 217
>
> 	
>
>
>
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