Thank Arnaud, And yes, d and e are scalars. In fact, they are constant for the entire image, while the image has three bands.
If I understand you correctly, this still counts as a vector transformation? On Apr 23, 2015 7:50 AM, "Arnaud Durand" <[email protected]> wrote: > Hi GiNN, > > I'm not sure that it is possible with such a simple expression, as the doc > said : > > > > *For instance, it is not possible to add vectors of different dimensions > (this implies the addition of a row vector with a column vector),or add a > scalar to a vector or a matrix, or divide two vectors, and so on...Thus, it > is important to remember that a pixel of n components is always represented > as a row vector.* > > However, if you know the number of bands in your image, and if d and e are > scalars, you might try to use vector syntax in your expression like that : > im1*{d^2,d^2,d^2,d^2}/{cos e, cos e, cos e, cos e} > > Arnaud > > Le mercredi 22 avril 2015 21:02:15 UTC+2, GiNN a écrit : >> >> >> I have three-band images and I want to apply the same expression to each >> band and get a three-bad output. >> I am just starting with OTB and Monteverdi. Used installer on a 64 bit W7 >> machine. >> >> The expression is very simple: output_pixel = (input_pixel*d^2)/cos e >> >> I read the cookbook recipe, and concluded BandmahX is what I need. But I >> am not sure how to formulate the expression so that the application goes >> through all pixels in all three bands. >> >> Any assistance is greatly appreciated. >> >> Gin >> > -- > -- > 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 a topic in the > Google Groups "otb-users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/otb-users/UHugkLOJEmw/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- -- 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.
