[Rtk-users] Python Wrapping

[Johnson Keiriz]

Hi Cyril,

Thanks for the valuable information, I will test and get back to you.

Regards,

Johnson

 

From: Cyril Mory [mailto:cyril.mory at uclouvain.be] 
Sent: Friday, March 18, 2016 4:13 AM
To: Johnson Keiriz; 'Simon Rit'
Cc: rtk-users at public.kitware.com
Subject: Re: [Rtk-users] Python Wrapping

 

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>
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] On Behalf Of
Johnson Keiriz
Sent: Thursday, March 17, 2016 9:23 AM
To: 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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