[gdal-dev] GDAL Speed Optimization

[Seth Price]

>1) hw accelerated functions as IPP or GPU (e.g CUDA)

This is my (ongoing) Google Summer of Code project, except I'm using
OpenCL. :D

What resampling algorithm are you using?
~Seth


On Thu, June 10, 2010 1:49 am, Stefano Moratto wrote:
> I use GDAL in my traffic optimization CAD program.
> It is a Win32 application written in DELPHI that uses GDAL "C" API - the
> binding was autogenerated by my SWIG module for object pascal.
>
> I use GDAL to download tiles (jpeg) from OpenstreetMap and to compose a
> bitmap of the area that is being viewed. The resulting bitmap (not
> compressed) is warped  and displayed.
>
> The performances are quite acceptable but when I try to print they are
> not.
>
> The drawing to be printed has a resolution larger of the screen (Screen :
> 1024x1024, Printer 4096 x 4094 in A4 and 9000 x 9000 in A3 approximately).
> I think tha the bottleneck could be found in:
> 1) jpeg decompression.
> 2) bitmap interpolation (I use the low qualitiy settings).
> 3) warping ( I use an approsimated warping function).
>
> An increase of performance could be achieved using
> 1) hw accelerated functions as IPP or GPU (e.g CUDA)
> 2) parallel alghorithms that takes advantage from multicore CPU
>
> Has someone already approched these problems?
>
> Regards,
> Stefano
>
>
> --
> Dr.Eng. Stefano Moratto
> stefano.moratto at gmail.com
> stefano.moratto at csiat.it
> http://www.csiat.it - Traffic Optimization Software
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