[Rtk-users] Python Wrapping

[Johnson Keiriz]

Hello,
Can you please confirm that the following classes are the ones used for 
the iterative reconstruction:
1 - SART: SARTConeBeamReconstructionFilter
2- Conjugate gradient: FourDConjugateGradientConeBeamReconstructionFilter

Is there a 3D conjugate gradient?
Are these the only classes for iterative reconstruction?

Thanks,
Johnson

On 3/18/2016 4:12 AM, Cyril Mory wrote:
> 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
>>
>> 	
>>
>>
>>
>> _______________________________________________
>> Rtk-users mailing list
>> Rtk-users at public.kitware.com
>> http://public.kitware.com/mailman/listinfo/rtk-users
>

-- 

*Johnson Keiriz, PhD
Senior Software Engineer*

760 St-Paul W, #101
Montreal, QC
Canada  H3C 1M4
tel: (514) 843-3861
ext 217

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