Hi Robin,
There is a cleaner way to do it.
In your example, the input minimum and maximum are not given to the
VectorRescaler, so it has to estimate them on each buffered region (i.e.
each stream block). This is why you get a different rescaling for each
block (some block may also have black borders, which gives a "wrong"
minimum value of 0).
What you can do is :
- estimate the min / max values in your input image using an
otb::StreamingStatisticsVectorImageFilter.
- set the input min/max values in the rescale filter.
- disable the automatic computation of input min/max
You can have a look to the application Convert
(Applications/Utils/otbConvert.cxx), which does nearly the same thing.
Regards,
Guillaume
Le 03/09/2014 13:33, Robin Holler a écrit :
I'm as glad as proud having resolved this by myself. Don't know if
it's the finest solution, but for now it works. The problem was
writing output through streaming TIFF in tiles ... some researching
brought http://wiki.orfeo-toolbox.org/index.php/Writing_large_images
and
http://www.orfeo-toolbox.org/doxygen-current/otbImageFileWriter_8h_source.html
... So I did some experiments and since export GDAL_CACHEMAX=256
didn't have any effect I finally ended with changing to stripped
Streaming but without dividing in lines or tiles:
|
Writer->SetAutomaticStrippedStreaming();
Writer->SetNumberOfLinesStrippedStreaming(0);
|
Works for now, but maybe somebody once will come up with a better
(more experienced) solution.
Regards,
Robin
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