Jonathan Guinet <[email protected]> wrote: > > Hi > > OTB paser which wrap MuParser class defines some functions in particular the > ndvi function > > in order to avoid numerical instabilites i think a test is made with "nir + > red " value > http://hg.orfeo-toolbox.org/OTB/file/80aea183436c/Code/Common/otbParser.cxx#l211 > > if the test fails 0 value is associated to the pixel > > http://hg.orfeo-toolbox.org/OTB/file/80aea183436c/Code/Common/otbParser.cxx#l213 > > to my opinion another value should be affected to the pixel, because a 0 > valued ndvi has a meaning, > > in suggest to assign a value outside [-1,1] interval for those pixels > > What do you think about that ?
I don't agree. If vcl_abs(r + niri) < 1E-6, that means that there is no vegetation, so ndvi=0 is OK. -- -- 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/groups/opt_out.
