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:*[email protected] [mailto:[email protected]] *On Behalf Of
*Simon Rit
*Sent:* Thursday, March 17, 2016 1:54 PM
*To:* Johnson Keiriz
*Cc:* [email protected]
*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
<[email protected] <mailto:[email protected]>> 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:[email protected]
<mailto:[email protected]>] *On Behalf Of *Johnson
Keiriz
*Sent:* Thursday, March 17, 2016 9:23 AM
*To:* [email protected]
<mailto:[email protected]>; 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:[email protected]*
*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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