One more thx Guillaume! =) I understand that my image is edited in tiles and I have to calculate and use absolute min/max values to be sure, each tile is processed the same way. Thx for that! I'll try soon, but I first have to make other things running and to do that faster, I'd like to know, if otbConvert is able to extract three selected bands only while converting format?
I'd like to give three integers (e.g. 5,3,2) as arguments and having converted a multispectral image TIFF to a 3-channel RGB PNG, for instance. Is that possible? Thx again, Robin Am Mittwoch, 3. September 2014 14:21:13 UTC+2 schrieb Guillaume Pasero: > > 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 > -- > -- > Check the OTB FAQ at > http://www.orfeo-toolbox.org/FAQ.html > > You received this message because you are subscribed to the Google > Groups "otb-users" group. > To post to this group, send email to [email protected] > <javascript:> > To unsubscribe from this group, send email to > [email protected] <javascript:> > For more options, visit this group at > http://groups.google.com/group/otb-users?hl=en > --- > You received this message because you are subscribed to the Google Groups > "otb-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > > > > -- > <http://www.c-s.fr> *Guillaume PASERO* > Ingénieur d'études et développement > *Business Unit E-SPACE & Geo Information* > <https://thor.si.c-s.fr/blogs/cs-blogs-business/>* - Département > APPLICATIONS* > > *CS Systèmes d'Information* > Parc de la Grande Plaine - 5, Rue Brindejonc des Moulinais - BP 15872 > 31506 Toulouse Cedex 05 - FRANCE > +33 561 17 64 21 - [email protected] <javascript:> > -- -- Check the OTB FAQ at http://www.orfeo-toolbox.org/FAQ.html You received this message because you are subscribed to the Google Groups "otb-users" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/otb-users?hl=en --- You received this message because you are subscribed to the Google Groups "otb-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
