[Insight-users] Question about using OpenCL shared buffer for more than one kernel

[Denis Shamonin]

Dear Weber,

1. I've implemented the Gaussian Filter
    itkGPURecursiveGaussianImageFilter and
itkGPUSmoothingRecursiveGaussianImageFilter
    in my paper http://hdl.handle.net/10380/3393 have a look to the article.
2. Yes, the memory could be copied only once from CPU->GPU and used by the
multiple kernels via pointers, use itkGPUDataManager for that.

Regards,


-Denis Shamonin, MSc

Division of Image Processing (LKEB)

Department of Radiology

Leiden University Medical Center

On Wed, Feb 20, 2013 at 12:02 AM, Joachim Weber <
joachim.weber at stud.hs-regensburg.de> wrote:

> Hi,
> i want to write a Gaussian Filter with ITK-GPU. I have a 3D image, which
> has to be filtered in all 3 directions(first Z, then X and then Y).
> Because ITK encapsulates the whole OpenCL functionality inside its on
> methods and classes, I find it very hard to define memory objects for
> multiple kernels.
> It don't want to copy the image between Host and Device the whole time,
> which would result in a heavy performance drawback.
> Is there a simple way to define OpenCL memory objects, which can be used
> by multiple kernels?
> I am not to much into ITK GPU, but it looks like, defining memory buffers
> for multiple kernels(which stay on Device) is not possible right now.
> Or do all kernels run in the same context?
>
>
> Many thanks in advance,
> Weber Joachim
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