[OpenDroneMap-dev] OpenMPI

[Stephen Mather]

Shared, or the messy part of passing data around...

Looking at the portions of the toolchain:

resize -- easily can be massively parallelized (also not a bottleneck)
keypoints -- same, but is a slow process now
match -- harder to parallelize without *a priori* knowledge of likely
matches
bundler -- currently not fully parallelized and a major bottleneck
cmvs/pmvs -- CMVS chops the scene into bite-sized chunks, making PMVS work
within smaller, reassembleable scene chunks. Ideal for distribution
meshing -- not sure, but fast to run relative to rest of toolchain
texturing -- not sure, but fast to run relative to rest of toolchain
georeferencing -- not sure, but fast to run relative to rest of toolchain
orthophoto -- not sure, but fast to run relative to rest of toolchain

match is probably the hardest part to efficiently parallize without shared
storage, but with some a priori knowledge of likely matching images (e.g.
exif geolocation), something clever might be done to overcome this
limitation.

Cheers,
Best,
Steve




On Mon, Apr 27, 2015 at 6:38 PM, Alex Mandel <tech_dev at wildintellect.com>
wrote:

> On 04/27/2015 09:18 AM, Bales, Donald J. wrote:
> > All,
> >
> > Forgive me if you feel this inquiry is misplaced, but I was wondering if
> OpenDroneMap has an OpenMPI implementation, or if you know of any OpenMPI
> implementation for image processing?  If not, is there any interest in the
> OpenDroneMap community to create an OpenMPI implementation so one can
> leverage high performance computing platforms?
> > Sincerely,
> >
> > Donald J. Bales
> > (630) 776-0071
> >
>
> We have been talking about converting the current Perl master script to
> something in Python (possibly flask based). At that point there would be
> good places to hook in an MPI library for python.
>
> The tricky part is going to be an efficient means of distributing the
> data. If you have a compute cluster this shouldn't be an issue (assuming
> you have some sort of shared storage). If you use Amazon it might mean
> you have all your nodes reads from the same S3, etc.
>
> Thanks,
> Alex
>
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